Detection and molecular characterization of a first isolate of rabbit haemorrhagic disease virus in Nigeria
AbstractRabbit haemorrhagic disease virus (RHDV) was recovered from necropsied rabbits that died during an outbreak characterized by epistaxis, incoordination, paralysis, and multi-organ haemorrhages in Ilorin, Nigeria. The haemagglutination test (HA) and RT-PCR assay targeted against a fragment of the RHDV VP60 gene were performed on liver, spleen, and kidney homogenates; faeces; and urine obtained from the rabbits. Amplicons were purified, sequenced, and phylogenetically analysed. The liver homogenates yielded the highest HA titres while RT-PCR of liver, spleen, and kidneys yielded the expected 1252 bp band. Sequence and...
Source: Tropical Animal Health and Production - February 28, 2021 Category: Veterinary Research Source Type: research

Metabolic status of lactating cows given a hepatoprotectant and different feed energy sources
AbstractThe present study aimed to evaluate the effects of hepatoprotective agents added to diets containing different energy sources on the metabolic status of lactating dairy cows in confinement. Sixteen Holstein × Gir crossbred midlactation cows with a body weight of 553 ± 85 kg were included in this feeding trial. These animals were arranged in a 4 × 4 Latin square experimental design. A 2 × 2 factorial arrangement was employed in this feeding experiment. Experimental treatments consisted of the admini stration of diets supplemented with a hepatoprotectant and diets without hepatoprotectant. Th...
Source: Tropical Animal Health and Production - February 28, 2021 Category: Veterinary Research Source Type: research

Principal component analysis of breeding values for birth weight milk and reproductive traits of the Egyptian buffalo
This study was conducted to estimate the genetic parameters and breeding values for birth weight (BW) and reproductive and milk traits of the Egyptian buffalo. Moreover, the relationship among the estimated breeding values was analyzed using the principal component analysis, and selection index was constructed to improve performance. A total of 65,734 records of 2426 buffalo cows calved from 1980 to 2018 were collected from five buffalo experimental herds to estimate the genetic parameters and breeding values and then standardized for use in the principal component analysis with covariance matrix. The estimated heritabilit...
Source: Tropical Animal Health and Production - February 26, 2021 Category: Veterinary Research Source Type: research

The effect of dilution rate and successive semen collections on sperm quality and sexual motivation of sexually mature South African Merino rams
This study investigated whether dilution rate and successive semen collections influenced sperm viability, morphology, motility and male sexual motivation in sexually mature South African Merino rams (SAMR). Semen was collected from 11 rams up to either sperm or behavioural exhaustion. Semen was then immediately serial diluted to make 0, 2, 4, 8 and 16 × dilutions with Hams F10 diluent. Following dilution, sperm motility was evaluated using computer-assisted sperm analysis (SCA®), while sperm morphology and viability were assessed using nigrosin–eosin staining and SYBR14/PI, respectively. Male sexual motiva...
Source: Tropical Animal Health and Production - February 25, 2021 Category: Veterinary Research Source Type: research

Risk factors associated with Ctenocephalides felis flea infestation of peri-urban goats: a neglected parasite in an under-appreciated host
AbstractGoats are critical in mixed smallholder agricultural systems in lower and middle-income countries, while fleas are important human and animal health concerns around the world. Convenience sampling was used to describe and consider risk factors for flea infestations of peri-urban goats, with the aim of informing the iterative development of animal husbandry and management based control strategies. Seven hundred and ninety-two goats were examined in 228 households across 10 peri-urban communities surrounding Blantyre in southern Malawi. The prevalence ofCtenocephalides felis fleas was 18.3, 37.1 and 100% at the level...
Source: Tropical Animal Health and Production - February 24, 2021 Category: Veterinary Research Source Type: research

Sero-epidemiology of porcine parvovirus, circovirus, and classical swine fever virus infections in India
This study provides useful information to set up future epidemiologic, flock management, and pub lic animal health policies for the prevention and control of PCV-2, PPV, and CSF in India. (Source: Tropical Animal Health and Production)
Source: Tropical Animal Health and Production - February 24, 2021 Category: Veterinary Research Source Type: research

Comparison of three methodologies for the genetic study of lactation persistency in Holstein cattle from Antioquia
The objective of this study was to compare Best Linear Unbiased Prediction (BLUP), marker-assisted BLUP (MBLUP) model and random regression model (RRM) to estimate genetic parameters and breeding values for the lactation persistency curve. 4,658 test day measurements were available for 733 individuals, from which lactation curves were described to calculate persistency, estimating genetic parameters and values for this trait through BLUP and MBLUP. A similar process was done for RRM, where persistency was estimated from the genetic lactation curve. The heritability obtained using RRM was 0.51, greater than that obtained by...
Source: Tropical Animal Health and Production - February 23, 2021 Category: Veterinary Research Source Type: research

Intake, digestibility, and milk yield response in dairy buffaloes fed Panicum maximum cv. Mombasa supplemented with seeds of tropical a çai palm
This study evaluated the effects of dietary inclusion of açai palm seeds in the supplement on nutrient utilization and m ilk yield response of lactating buffaloes grazingPanicum maximum cv. Mombasa. The treatments comprised four levels of a çai palm seeds (0, 198.4, 396.8, and 595.2 g/kg of dry matter) and a treatment without concentrate supplementation (WCS). Five half-breed Murrah female buffaloes with average body weight ± (SEM) of 577 ± (20.4) kg were used in a 5 × 5 Latin square design. There was no effect of the inclusion of açai palm seeds on the total dry matter and nutrient...
Source: Tropical Animal Health and Production - February 22, 2021 Category: Veterinary Research Source Type: research

Development of cost-effective quantitative PCR method for parallel detection of porcine circovirus2 and porcine parvovirus in perspective of North-eastern India
AbstractPig farming performs as an intricate part in the socio-economic situation in the north-eastern region of India. This region contributes 38% (3.95 million) of total pigs in India. In spite of this, the region unables to flourish as an enterprise as per the expectation due to a low productivity rate. Porcine infectious pathogens like porcine cirovirus2 (PCV2) and porcine parvovirus (PPV) have a direct economic impact on pig farming through slow growth rate, abortion, and mortality and ultimately maximize the production cost by increasing the usage of antibiotic or antiviral drugs. The veterinary diagnostic infrastruc...
Source: Tropical Animal Health and Production - February 22, 2021 Category: Veterinary Research Source Type: research

Fetal mortality associated with backfat thickness at first mating and first farrowing of the primiparous sows raised in a commercial herd in Thailand
This study aimed to investigate the fetal mortality, including stillborn piglets (SB) and mummified fetuses (MM), in relation to backfat thickness both at first mating (MBF) and at first farrowing (FBF) in 200 primiparous sows accommodated in a commercial breeding herd in Thailand. Backfat thickness of all pigs was measured at P2 position using an A-mode ultrasonography. Based on MBF, the gilts were classified into four groups: MBF1 ( ≤12.0 mm), MBF2 (>12.0 –15.0 mm), MBF3 (>15.0 –18.0 mm), and MBF4 (>18.0 mm). According to FBF, the primiparous sows were categorized into four classes: FBF1 ( ≤15....
Source: Tropical Animal Health and Production - February 20, 2021 Category: Veterinary Research Source Type: research

Backyard poultry farming for sustained production and enhanced nutritional and livelihood security with special reference to India: a review
AbstractA comprehensive review on backyard poultry farming (BYPF) was carried out with respect to history, status, production systems, management practices, role in socio-economic development, etc., considering the Indian scenario in particular. Backyard poultry is an age-old traditional practice where small numbers of native chickens are reared with or without inputs under the free-range scavenging conditions. Currently, BYPF contributes about 17.8% (18.41 billion) of the total egg production (103.32 billion) of India. The introduction of high yielding chicken varieties, which resemble the native chicken, transformed the ...
Source: Tropical Animal Health and Production - February 20, 2021 Category: Veterinary Research Source Type: research

Genetic diversity and population structure of Tibetan sheep breeds determined by whole genome resequencing
This study could contribute to our understanding about trait formation and offer a reference for breeding of Tibetan sheep. (Source: Tropical Animal Health and Production)
Source: Tropical Animal Health and Production - February 20, 2021 Category: Veterinary Research Source Type: research

Modulating the lipid profile of beef using cottonseed and crude glycerin
The objective was to evaluate the impact of the supply of cottonseed and crude glycerin as modulators of the lipid profile of the beef produced on pasture. The concentrated supplement was formulated with two levels of cottonseed (0 and 25%) and/or two levels of crude glycerin (0 and 15%), totaling four experimental groups. Two experiments were conducted; the first experiment was outlined in a 5 × 5 Latin square design, contrasting the protein-energy supplementation with the mineral supplementation. The concentrate supplementation allowed the increase in intake and digestibility of the dry matter (P = 0.03), ether ext...
Source: Tropical Animal Health and Production - February 18, 2021 Category: Veterinary Research Source Type: research

Association of ionophores, yeast, and bacterial probiotics alters the abundance of ruminal microbial species of pasture intensively finished beef cattle
AbstractThe effect of the association of non-protein nitrogen, yeast, and bacterial probiotics on the ruminal microbiome of beef cattle intensively finished on pasture was evaluated. The experiment was carried out in a completely randomized design with five treatments and four replications. The treatments consisted of a group of animals kept on pasture that received low consumption supplementation (LS) and four groups that received for 98 days, 17.5 g concentrate kg−1 body weight. The supplements were composed of the association of additives: urea (U), slow-release non-protein nitrogen (U+SRN), yeast (Saccharomyces c...
Source: Tropical Animal Health and Production - February 17, 2021 Category: Veterinary Research Source Type: research

Correction to: Importance of livestock diseases identified using participatory epidemiology in the highlands of Ethiopia
An erratum to this paper has been published:https://doi.org/10.1007/s11250-021-02593-7 (Source: Tropical Animal Health and Production)
Source: Tropical Animal Health and Production - February 17, 2021 Category: Veterinary Research Source Type: research

Intake, digestibility, milk yield and composition, and ingestive behavior of cows supplemented with byproducts from biodiesel industry
AbstractThis trial aimed to analyze the effects of including three byproducts from the biodiesel industry on the intake, digestibility, milk yield and composition, and feeding behavior of lactating cows. Eight crossbred Holstein-Zebu lactating cows with average body weight 525 ± 18.5 kg and average milk yield of 8 ± 1.45 kg day–1 were assigned to four treatments (diets) in a double-Latin square design, as follows: a diet based on corn- and soybean meal-based concentrate and three diets with 20% inclusion of byproducts from the biodiesel industry (cottonseed cake, sunflower meal, and castor bean cake) on...
Source: Tropical Animal Health and Production - February 17, 2021 Category: Veterinary Research Source Type: research

Viability of the use of mycotoxin adsorbent in the finishing of Texel lambs in confinement
The objective of the present study was to evaluate the viability of a mycotoxin adsorbent based on beta-glucans from cell walls ofSaccharomyces cerevisiae and bentonites in the diets of confined lambs of the Texel breed. Twenty-four lambs (12 males and 12 females) with an average weight of 18.6 kg ± 1.6 were divided into two groups: treated (with adsorbent) and control. The animal diets contained the mycotoxins aflatoxin B1, fumonisin B1 and B2, zearalenone, and deoxynivalenol in concentrations within guidance levels. The animals were slaughtered with body weight of approximately 26.4 kg. Th e performance and carcas...
Source: Tropical Animal Health and Production - February 17, 2021 Category: Veterinary Research Source Type: research

Spineless cactus use management on microbiological quality, performance, and nutritional disorders in sheep
AbstractThe physically effective neutral detergent fiber content alone has not been able to explain the appearance of diarrhea in ruminants fed diets with large volumes of spineless cactus, so the proliferation of enterobacteria in spineless cactus may be associated with cases of diarrhea in sheep. In the in vitro test, used two varieties of spineless cactus, both of which were chopped to particles of 4 and 2 cm2. For the in vivo test, 15 lambs were allocated to three treatment groups, namely, spineless cactus crushed and immediately supplied to the animals; spineless cactus crushed 8 h before supply; and silage of spinele...
Source: Tropical Animal Health and Production - February 16, 2021 Category: Veterinary Research Source Type: research

Knowledge, attitude and perception of bovine piroplasmosis by cattle owners in Constantine, North-East of Algeria, using participatory epidemiology
This study provides information about knowledge on bovine piroplasmoses in Algeria. These information could be considered when performing control programmes by both animal decision-makers and field veterinarians. (Source: Tropical Animal Health and Production)
Source: Tropical Animal Health and Production - February 16, 2021 Category: Veterinary Research Source Type: research

Lumpy skin disease in Kazakhstan
This study describes the registration of the first cases of lumpy skin disease in July 2016 in the Republic of Kazakhstan. In the rural district of Makash, Kurmangazinsky district of Atyrau region, 459 cattle fell ill and 34 died (morbidity 12.9% and mortality 0.96%). To determine the cause of the disease, samples were taken from sick and dead animals, as well as from insects and ticks. LSDV DNA was detected by PCR in all samples from dead animals and ticks (Dermacentor marginatus and Hyalomma asiaticum), in 14.29% of samples from horseflies (Tabanus bromius), and in one of the samples from twoStomoxys calcitrans flies. Th...
Source: Tropical Animal Health and Production - February 15, 2021 Category: Veterinary Research Source Type: research

Breed effects and heterosis for weight traits and tick count in a cross between an indigenous fat-tailed and a commercial sheep breed
AbstractTicks can compromise productivity and welfare in free-ranging sheep. Chemical tick control may not be sustainable in the long term. Alternative control measures must be sought for an integrated control programme. Birth and weaning weights as well as log transformed overall tick count of indigenous fat-tailed Namaqua Afrikaner (NA), commercial Dorper and NA x Dorper cross lambs were studied under extensive conditions. Relative to NA lambs, Dorper lambs were 22.2% heavier at weaning (P
Source: Tropical Animal Health and Production - February 15, 2021 Category: Veterinary Research Source Type: research

The contribution of extensive chicken production systems and practices to Newcastle disease outbreaks in Kenya
AbstractNewcastle disease (ND) poses a challenge especially for farmers rearing indigenous chicken under the extensive system. This is due to the lack of uniformity in practices, favoring the introduction and spread of the disease. This is worsened by the lack of information on how management practices contribute to the spread of ND. The current study assessed the role of extensive chicken production systems and management practices on the frequency of ND outbreaks in Kenya using a Poisson regression model (PRM) on primary survey data from 332 farmers in Kakamega and Machakos counties. Descriptive results showed a low acce...
Source: Tropical Animal Health and Production - February 15, 2021 Category: Veterinary Research Source Type: research

Genome-wide association study for postweaning weight traits in Lori-Bakhtiari sheep
This study was conducted to perform a genome-wide association study to detect candidate genes and quantitative trait loci associated with postweaning weight traits in meat-type sheep. Body weight records were collected during 29 years (1989 to 2017) in Lori-Bakhtiari sheep flock of the Shooli Breeding Station in Iran. A total of 132 animals were selected based on estimates of breeding values (EBVs) for body weight, using two-tailed and random selection strategies. Genomic DNA was extracted from whole blood samples. The samples were genotyped using Illumina OvineSNP50 BeadChip. De-regressed EBVs for postweaning body weight ...
Source: Tropical Animal Health and Production - February 14, 2021 Category: Veterinary Research Source Type: research

Lipid rich diet from sunflower seeds can alter the proportion of fatty acids on hybrid Beefalo × Nellore cattle
AbstractWe evaluated the lipid level effects in the diet on performance, carcass, and meat characteristics of forty-eight steers and heifers, F1 Beefalo (Bostaurus taurus × Bison bison hybrid) × Nellore (Bos taurus indicus), 22 months old, being 24 steers (393.2 ± 15 kg) and 24 heifers (278.4 ± 8 kg). The animals were distributed in a completely randomized design in a 4 × 2 factorial scheme (lipid levels in diet 55-, 65-, 75-, and 85-g/kg dry matter obtained by whole sunflower grainHelianthus annuus and two sexes). Increased amounts of sunflower grain in diet linearly reduce the proportion o...
Source: Tropical Animal Health and Production - February 13, 2021 Category: Veterinary Research Source Type: research

Growth performance and fertility of Windsnyer boars supplemented with α-tocopherol
AbstractThe purpose of the present work was to determine the response in growth performance and spermatozoa characteristics of Windsnyer boars supplemented with progressive levels of α-tocopherol. Twenty Windsnyer boars aged 12 weeks with an average body weight of 19.5 ± 2.67 kg were used. Each boar was housed individually in a 1.54 × 0.8 m pen in environmentally controlled house with the temperature ranging from 22 to 25 °C. Five boars were randomly assigned to each diet co ntaining 0, 40, 70 and 90 IU of α-tocopherol. The growth performance experiment lasted for 12 weeks. Subsequently, boars ...
Source: Tropical Animal Health and Production - February 12, 2021 Category: Veterinary Research Source Type: research

Electron microscopy and phylogenetic analysis of Bovine papillomavirus infection in cattle from four Egyptian governorates
In conclusion, continuous surveillance and characterization of the circulating strains using multiple sets of primers are important. Efficient biosecurity measures must be applied to decrease transmission ofpapillomavirus between the different animal species, especially in the mixed management system. (Source: Tropical Animal Health and Production)
Source: Tropical Animal Health and Production - February 12, 2021 Category: Veterinary Research Source Type: research

Financial losses estimation of African animal trypanosomosis in Nigeria: field reality-based model
DiscussionsAAT has severe socioeconomic impact on producer ’s livelihood and urgent improved control intervention strategies should be instituted to reduce the losses attributed to the disease. (Source: Tropical Animal Health and Production)
Source: Tropical Animal Health and Production - February 11, 2021 Category: Veterinary Research Source Type: research

Feeding behavior of feedlot lambs fed diets with different energy and protein sources
This study aimed to evaluate the effect of the replacement of ground corn by crude glycerin and soybean meal by cottonseed cake, in association or not, on feedlot lambs ’ feeding behavior. Thirty-two non-castrated crossbred ½ Dorper ½ Santa Inês lambs, with an average body weight of 18.52 ± 3.24 kg (mean ± standard deviation), were distributed in a completely randomized design, into four treatments and eight replicates per treatment, in a 2 × 2 fac torial scheme. Four experimental diets were tested with different sources or combinations of energ...
Source: Tropical Animal Health and Production - February 10, 2021 Category: Veterinary Research Source Type: research

Biofuel by-product can replace partially corn in supplement for Angus × Nellore heifers: productive performance and meat characteristics
AbstractThe aim of this is study was to test the hypothesis that corn can be partially replaced by crude glycerin (at a level of 50%) without affecting performance, ingestive behavior, ruminal parameters, meat composition, and fatty acids profile on the meat of heifers. Sixty-four intact plus four rumen cannulated Angus × Nellore heifers (359.0 ± 12.15 kg BW) were used. The cannulated animals received the same diets as the intact ones to determine the ruminal N-NH3 concentration, pH, and chewing activity weekly. All heifers were maintained inBrachiaria brizantha pasture and supplemented with a concentrate cont...
Source: Tropical Animal Health and Production - February 10, 2021 Category: Veterinary Research Source Type: research

Towards objective measurement of reproductive performance of traditionally managed goat flocks in the drylands of Ethiopia
AbstractReproductive performance is a key determinant for the efficiency of goat production. Regular monitoring of reproductive efficiency is essential to assess management and to avoid financial losses due to poor performance. To allow more objective measurement and comparisons over time, we propose a novel quantitative approach for defining annual reproductive performance by combining common performance indicators into a goat flock index. Commonly used reproductive performance measures were collected from 242 goat flocks in four districts in dryland of Ethiopia between July 2018 and February 2019. Principal component ana...
Source: Tropical Animal Health and Production - February 8, 2021 Category: Veterinary Research Source Type: research

Identification of Leptospira spp. in the animal-environment interface (swine-water) in pig production cycle
ConclusionIt is suggested that the bacteria might be transmitted in the animal-environment interface in the pig production cycle. (Source: Tropical Animal Health and Production)
Source: Tropical Animal Health and Production - February 8, 2021 Category: Veterinary Research Source Type: research

Morphologic characterization of the Blanche de Montagne, an endemic sheep of the Atlas Mountains
AbstractThe present study aims to investigate the morphological characteristics of the Blanche de Montagne sheep breed, mainly known by its long white fleece. The morphological characterization was performed on a total of 70 unrelated individuals of both sexes, having between 2 and 8 teeth and belonging to 13 farms located in the Ouarzazate region. The body measurements studied were body weight, body length, chest circumference, height at withers, rump height, chest depth, chest width, hip width, head length, head width, ear length, ear width, horn length, cannon circumference, wool length, and tail length. These measureme...
Source: Tropical Animal Health and Production - February 7, 2021 Category: Veterinary Research Source Type: research

Effect of a single or two doses of an anti-GnRH vaccine on testicle morpho-functional characteristics in Nelore bulls
AbstractThe aim of this study was to compare testicle morpho-functional characteristics in bulls undergoing a single or two immunizations against GnRH. Nelore (Bos taurus indicus) bulls were randomly allocated into three experimental groups: G1 (n=12), a single 400 μg dose of anti-GnRH vaccine on day 0; G2 (n=11), a first 400 μg dose of anti-GnRH vaccine on day 0 followed by a second (boost) dose 30 days later; and control group (CG,n=12), 1 mL saline 0.9% at day 0. Every 30 days, from day 0 until slaughter at day 90, the bulls were weighed and underwent testicular biometry, semen collection and analysis, and blood s...
Source: Tropical Animal Health and Production - February 6, 2021 Category: Veterinary Research Source Type: research

Zootechnical and health performance of Holstein x Gir crossbred calves
AbstractCrossbreeding is used to increase production and disease resistance in adult animals, and there is no research to assess the performance of animals in the early stages. The aim of this study was to evaluate the zootechnical and health performance of Holstein x Gir calves ( ½ HG: ½ Dutch ½ Gir and ¾ HG: ¾ Dutch ¼ Gir), from birth to 80 days of age, and compare metabolic parameters between groups. In this sense, calves were monitored for zootechnical parameters; epidemiological indexes such as morbidity, mortality, recurrence of diarrhea, pneumonia, and other dise ases; as we...
Source: Tropical Animal Health and Production - February 4, 2021 Category: Veterinary Research Source Type: research

Comparison of nonlinear mathematical models for lamb growth analysis
AbstractWith the objective to determine the best mathematical model that could demonstrate the relationship between body weight and age in crossbred sheep, and to evaluate its applicability in different farms, 9985 live weight records of 837 crossbred lambs of Texel, Ile de France, Suffolk, and Hampshire Down breeds were used. Brody, von Bertalanffy, Richards, Logistic, and Gompertz models were fitted to the weight data, which were compared based on adjustedR2, Syx%, chi-square, and Kolmogorov –Smirnov tests, as well as residual analysis. After selecting the model, lambs whose weights at different ages fell within, b...
Source: Tropical Animal Health and Production - February 4, 2021 Category: Veterinary Research Source Type: research

Behavioral and physiological responses to early weaning in ewes and their single or twin lambs
AbstractAs during the early postpartum, ewes and their twin lambs have a weaker bond than ewes that rear single lambs; it might be expected that early artificial weaning would trigger less intense behavioral and physiological responses in mothers and their twin lambs than in mothers and their single lambs. The aim of this study was to compare the behavioral and physiological responses of ewes and their twin or single lambs to early weaning. The study was performed with 19 Saint Croix ewes: 10 bearing single lambs and nine bearing twins (data from only one sibling from each pair of twins was collected). Lambs were weaned at...
Source: Tropical Animal Health and Production - February 4, 2021 Category: Veterinary Research Source Type: research

Risk factors associated with testing positive for tuberculosis in high-yielding Holstein cows
The objective of this study was to assess various risk factors associated with testing positive for bovine tuberculosis (bTB) in high-yielding Holstein cows in an intensive dry-lot dairy operation. In a retrospective observational study, 9312 records from Holstein cows from a large dairy herd in northern Mexico were used. The incidence rate of lactating cows reactor to bTB was 7.3 cases/100 cow years (95% CI = 6.7 –7.9%). Multiple logistic regression models indicated that cows with total milk yield during the first lactation>10,200 kg were 1.3 times (95% confidence intervals (CI) for odds ratio (OR) = 1.2 –1...
Source: Tropical Animal Health and Production - February 2, 2021 Category: Veterinary Research Source Type: research

Prediction of responses of indigenous Boschveld chickens to probiotic-yeast additive levels using a quadratic optimisation model
AbstractThis experiment was performed to determine the nutrient content of yeast (Saccharomyces cerevisiae) and effect on carcass characteristics, relative internal organ weights, digesta pH, and lengths and weights of the different segments of the gastrointestinal tract (GIT) of indigenous Boschveld chickens. Six hundred-day-old unsexed Boschveld chicks were divided into six groups of 100 birds with each group replicated five times. Birds were fed broiler starter from 1 to 49  days and grower diet from 50 to 91 days. Each group was allotted to commercial broiler mash diet supplemented with yeast designated 0&nbs...
Source: Tropical Animal Health and Production - January 30, 2021 Category: Veterinary Research Source Type: research

Ehrlichia spp. close to Ehrlichia ruminantium , Ehrlichia canis , and “ Candidatus Ehrlichia regneryi” linked to heartwater-like disease in Kenyan camels ( Camelus dromedarius )
We present findings from an outbreak of a heartwater-like disease in camels that killed at least 2000 adult animals in Kenya in 2016. Clinical signs included excitability, head pressing, aimless wandering, recumbency, and fast breathing followed by death after about 4  days. The observed morbidity in one herd was 40% with an average mortality of 7.5% in animals that received early antibiotic treatments. In untreated adults, the case fatality rate reached 100%. Gross pathology showed pulmonary edema, pleural exudate, hydrothorax, hydropericardium, ascites, enlarg ed “cooked” liver, nephrosis, and blood in t...
Source: Tropical Animal Health and Production - January 29, 2021 Category: Veterinary Research Source Type: research

Salmonella in the processing line of farmed Tambatinga ( Colossoma macropomum x Piaractus brachypomus ) in Mato Grosso, Brazil: serotypes of occurrence and antimicrobial profile
The objective of this study was to evaluate the dispersion dynamics and antimicrobial resistance profiles ofSalmonella in the processing of Tambatinga (Colossoma macropomum xPiaractus brachypomus). Thirty fish were monitored during four processing stages (reception, first wash, evisceration, and prepackage area) in a fish slaughterhouse. One hundred and twenty fish surface samples were collected and tested through bacteriological analysis, PCR, serotyping, and antimicrobial resistance profile (disk-diffusion). Of these samples, 7.5% (9/120) were positive forSalmonella, with 0.83% being observed in the pre-packaging phase, ...
Source: Tropical Animal Health and Production - January 29, 2021 Category: Veterinary Research Source Type: research

Water buffaloes ( Bubalus bubalis ) only have A2A2 genotype for beta-casein
This study aimed to evaluate the alleles of beta-casein in buffaloes. A total of 657 buffaloes of four different breeds were genotyped and all animals carried the A2A2 genotype, i.e., allele A1 does not exist in the buffalo species. Thus, all milk products of buffaloes are naturally A2. This result adds value to products derived from buffalo milk. (Source: Tropical Animal Health and Production)
Source: Tropical Animal Health and Production - January 28, 2021 Category: Veterinary Research Source Type: research

Effect of heat stress amelioration through open-ridge ventilated thatched roof housing on production and reproduction performance of crossbred Jersey cows
AbstractThe present study was conducted to assess the impacts of loose house roofing designs and materials on modulation of micro-climate of the cow shed and its influences on production and reproduction performance of lactating crossbred Jersey cows. The control group (T0) was kept in a traditional single-slope asbestos roof shed and treatment group (T1) at a specially designed open-ridge ventilated, double-slope thatch roof shed. Lactation stage, average daily milk yield, and average parity at the beginning of the experiment were kept similar between T0 and T1 cows. The specifically designed T1 shed had significantly (P 
Source: Tropical Animal Health and Production - January 28, 2021 Category: Veterinary Research Source Type: research

Evidence of cooperative calves ’ care and providers’ characteristics in zebu cattle ( Bos indicus ) raised under extensive conditions
AbstractCommunal rearing has been reported in several mammals, including wild ungulates. However, until now, there was no evidence of any alloparental care in theBos genus. To test the hypothesis that calves ’ groups are formed under the care of specific cows, a herd of 31 peri-partum zebu cows raised under pasture conditions were used. Groups of ≥ 3 individuals within a 10-m diameter were estimated using aerial pictures taken every other day at 7:00, 10:30, 13:30, 16:00, and 18:00 h, during 6 w eeks. Temperament (exit speed, flight distance, intensity of reaction), age, and parity of each cow wer...
Source: Tropical Animal Health and Production - January 27, 2021 Category: Veterinary Research Source Type: research

Meat production traits of Angora goat 1: fattening, slaughter, and carcass characteristics of intact and castrated kids
AbstractFattening performance, slaughter, and carcass traits of intact and castrated Angora goat kids slaughtered at different slaughter weights were examined. A total of 96 (48 intact, I-kids, and 48 castrated, C-kids) single Angora kids were fattened, and 48 of them (24 I-kids and 24 C-kids) were slaughtered at slaughter weights (SW) of 20, 25, and 30  kg. Castration negatively affected fattening performance, and the kids showed rising daily weight gain with increasing SW. While dressing percentages were not affected by castration, it caused a tendency for a decrease in offal. However, with the increase in SW, dress...
Source: Tropical Animal Health and Production - January 27, 2021 Category: Veterinary Research Source Type: research

Permanence time in the herd and milk production of Holstein cows with up to five successive extended lactations
AbstractA total of 1338 high-yielding cows with five lactations from a large well-managed commercial dairy operation in a hot environment of northern Mexico were used to evaluate milk yield and reproductive performance of cows undergoing unplanned extended lactations (EL;> 450 days). The null hypothesis that cumulative milk yield during five consecutive lactations is the same in cows not having unplanned EL and cows with several EL was tested. All EL resulted from cows failing to become pregnant with ≥ 4 services. Cows were allocated to 1 of 6 groups according to the number of EL (EL0 for cows with no EL to EL5 for c...
Source: Tropical Animal Health and Production - January 26, 2021 Category: Veterinary Research Source Type: research

Effect of different blend levels of spineless cactus and Mombasa hay as roughage on intake, digestibility, ingestive behavior, and performance of lambs
This study aimed to determine the best level of the blend of spineless cactus (Nopalea cochenillifera) and Mombasa (Panicum maximum) hay as roughage in the diet of lambs based on intake, digestibility, ingestive behavior, and lamb performance. Forty-eight uncastrated crossbred Santa Ines breed lambs with an average age of 4 months old and an average initial BW of 20.5 kg ± 2.8 kg were distributed in two experiments using a completely randomized design: experiment 1: 16 lambs (four treatments and four replicates) for in vivo digestibility trial in metabolic cage; experiment 2: 32 lambs (four treatments and eight repl...
Source: Tropical Animal Health and Production - January 26, 2021 Category: Veterinary Research Source Type: research

Power of phenotypes in discriminating Awassi sheep to pure strains and from other breeds
In this study, we report phenotypic traits of discriminant power to assign sheep individuals into Awassi breed or other exotic breeds found in Jordan. Twenty-two and 19 phenotype traits for ewes and rams, respectively, were utilized using multivariate and discriminant analyses. Seven traits, out of them, for ewes and five for rams were qualitative traits: body color, nose shape, horn presence, ear shape, wattles presence, udder shape, and teat placement. The other 15 traits were quantitative traits: body weight, head width, head length, chest depth, chest girth, shoulder width, withers height, foreleg height, shin circumfe...
Source: Tropical Animal Health and Production - January 26, 2021 Category: Veterinary Research Source Type: research

Dietary supranutritional supplementation of selenium-enriched yeast improves feed efficiency and blood antioxidant status of growing lambs reared under warm environmental condition
The objective of this study was to investigate the impacts of dietary supranutritional supplementation of selenium-yeast (SY) on growth performance, blood cells, antioxidant status, and metabolic profile of lambs. Twenty-one Kermani male lambs (28.5  ± 2.6 kg of body weight) were used in a completely randomized design for 8 weeks under warm condition with temperature-humidity index (THI) of 81.3 ± 0.37 unit. The lambs were randomly divided into 3 groups given the basal diet either un-supplemented (control group) or supplemented with 0.6 or 1.2 mg of Se/kg dry matter ...
Source: Tropical Animal Health and Production - January 24, 2021 Category: Veterinary Research Source Type: research

Response to reduced dietary protein level on growth performance in growing Windsnyer pigs
The objective of the study was to determine the growth performance response to reduced dietary protein level and to identify the optimum level of protein for the performance in growing Windsnyer pigs. Maize-soybean-based diets were formulated to contain a protein level of 193  g/kg, 173.7 g/kg, 154.4 g/kg, 135.1 g/kg, 115.8 g/kg and 96.5 g/kg. The 193 g/kg (control diet) is the standard recommended by the National Research Council. The amino acid levels and net energy value were similar in all treatments. The study was conducted with five growing Windsnyer pigs pe r each protein inclusion...
Source: Tropical Animal Health and Production - January 23, 2021 Category: Veterinary Research Source Type: research

The effect of different slaughter weights on some meat quality traits of musculus longissimus dorsi thoracis of male Anatolian buffaloes
AbstractThis research was performed to examine the effects of different slaughter weights (SWs) on some meat quality traits of Anatolian Buffaloes (n = 20). Weaned 5-month-old Anatolian Buffalo calves with an average live weight of 100 kg were used as the animal material of the study. Experimental calves were randomly divided into four different slaughter weight groups 200 kg (SW-1:n = 5), 250 kg (SW-2:n = 5), 300 kg (SW-3:n = 5), and 350 kg (SW-4:n = 5). Anatolian buffalo calves were fed with 30:70 roughage/concentrate feed rati...
Source: Tropical Animal Health and Production - January 23, 2021 Category: Veterinary Research Source Type: research