[Seroprevalence and risk factors associated with Neospora caninum in dairy farms from the Province of Salta, Argentina].
The objective of this work was to determine the seroprevalence of Neospora caninum in cattle in Valle de Lerma, province of Salta, Argentina, and the risk factors associated with the disease. Serum samples were taken from 40 cows in each dairy herd, which were analyzed by indirect ELISA to detect antibodies against N. caninum. Chronic and acute infections were discriminated by measuring the avidity of these antibodies. All the herds exhibited at least one seropositive animal, the mean being 35.3 ± 14.9% of positive animals. Specific antibodies were also detected in dogs present in 9of the herds, which showed a serop...
Source: Revista Argentina de Microbiologia - September 17, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Optimization and application of a high-resolution melting protocol in the characterization of avian infectious laryngotracheitis virus.
Authors: Rojas MF, König GA, Vagnozzi AE, Vera FS, Scolaro LA, Craig MI Abstract A previous sequence analysis of a US5 gene fragment of infectious laryngotracheitis virus (ILTV) performed in an Argentinian epidemiological study allowed to differentiate between wild and vaccine strains. This analysis also defined five ILTV haplotypes with specific variations at positions 461, 484, 832, 878 and 894 of the US5 gene. This characterization of viral strains may also be accomplished using the High-Resolution Melting Analysis (HRMA), which has been described as an effective, fast and sensitive method to detect mutatio...
Source: Revista Argentina de Microbiologia - September 15, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Evaluation and selection of culture media for the detection of auxin-like compounds and phosphate solubilization on soil yeasts.
Authors: Mestre MC, Severino ME, Fontenla S Abstract The detection of characteristics associated with plant growth promotion has been studied frequently on bacteria and some of these detection methods were also used on yeasts. Sometimes, these methods, designed for prokaryotes, were used with no prior analysis regarding growth and production on eukaryotes. The aim of the present study was to assess and select the best suitable media for the detection of auxin-like compound production and inorganic-P solubilization on yeast strains. Already published media and new formulations, as well as yeasts with different genet...
Source: Revista Argentina de Microbiologia - September 8, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Baseline prevalence and type distribution of Human papillomavirus in sexually active non-vaccinated adolescent girls from Argentina.
In conclusion, results confirm that HPV (particularly HR-types) are very common among sexually active adolescents, and prevalence rises quickly after their sexual debut. Our HPV type-specific prevalence baseline may be used to monitor post-vaccinal longitudinal changes in Argentina. PMID: 32788072 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - August 15, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Invasive candidiasis: A view to central nervous system infection].
This article summarizes relevant aspects on the clinical characteristics of this pathology, mechanisms of fungus invasion, local immune response to Candida albicans and the impact of genetic defects on innate immune receptors that increase susceptibility to the acquisition of this form of mycosis. PMID: 32768262 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - August 14, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Sporotrichoid nocardiosis by Nocardia brasiliensis].
Authors: Mangieri NA, Guevara Nuñez D, Echavarría G, Bertona E, Castello L, Benchetrit G, De Paulis AN Abstract Nocardia brasiliensis is a gram-positive, branched, aerobic, acid-resistant, rod-shaped bacillus that inhabits in soil, rotten organic matter and waters. Cutaneous nocardiosis in immunocompetent individuals can manifest in three different forms: actinomycetoma, superficial skin infection or lymphocutaneous infection. A case of an 85-year-old woman with an ulcerated lesion on the back of her left hand with erythematous papules in the lymphatic tract infected by N. brasiliensis is described. T...
Source: Revista Argentina de Microbiologia - August 4, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Molecular epidemiology of Campylobacter jejuni isolates from the broiler production chain: first report of MLST profiles in Argentina.
This study showed high genetic diversity among C. jejuni in the broiler production environment in Argentina with novel MLST genotypes. PMID: 32736818 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - August 2, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Corynebacterium pyruviciproducens and Corynebacterium amycolatum mastitis in immunocompetent no breastfeeding women].
This report seeks to give importance to this genus by always ranking cultures, starting with a thorough sample collection up until a complete evaluation of lab results and clinical presentation. PMID: 32718823 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - July 30, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Toxigenic fungal species and natural occurrence of mycotoxins in crops harvested in Argentina.
Authors: Chiotta ML, Fumero MV, Cendoya E, Palazzini JM, Alaniz-Zanon MS, Ramirez ML, Chulze SN Abstract Mycotoxins are secondary metabolites produced by fungal species that mainly belong to Aspergillus, Fusarium, Penicillium and Alternaria, which can grow in a variety of crops including cereals, oilseeds and fruits. Consequently, their prevalence in foods and by-products not only affects human and animal health but also causes important losses in both domestic and international markets. This review provides data about toxigenic fungal species and mycotoxin occurrence in different crops commonly grown in Argentina....
Source: Revista Argentina de Microbiologia - July 30, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Detoxification of Ochratoxin A by a novel Aspergillus oryzae strain and optimization of its biodegradation.
This study demonstrates the potential for using A. oryzae to detoxify OTA and suggests that it could be applied in the food industry to improve food safety and quality. PMID: 32693928 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - July 23, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Removal of dyes by immobilization of Trametes versicolor in a solid-state micro-fermentation system.
Authors: Diorio LA, Fréchou DMS, Levin LN Abstract A novel bioreactor system (low cost and easily scaled-up) is presented for dye decolorization applying filamentous fungi. In this two-phase bioreactor, dyes were decolorized at 28°C in a first phase by immobilized fungi in spherical cartridges prepared with a high-density plastic polyethylene mesh and filled with wheat bran as substrate for growth. In a second phase the capacity of the ligninolytic enzymes (laccase and Mn-peroxidase) present in the extracellular extracts from the solid residues was exploited for decolorization at 50°C. Each sphere be...
Source: Revista Argentina de Microbiologia - July 6, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Plant resistance to pathogens: A review describing the vertical and horizontal resistance concepts].
Authors: Burbano-Figueroa Ó Abstract Understanding plant resistance requires an interdisciplinary effort between biological and agricultural sciences. In this setting, phytopathology has experienced an upsurge of interest from researchers and scholars in the disciplines of ecology, evolution and molecular biology. This encounter did neither avoid misunderstandings among scholars nor the use of similar concepts with different meanings. The purpose of this paper is to offer a modern comprehensive view of plant resistance against pathogens using a classical phytopathology concept as framework: Van der Plank s c...
Source: Revista Argentina de Microbiologia - July 6, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Effect of fungicides commonly used for Fusarium head blight management on growth and fumonisin production by Fusarium proliferatum.
Authors: Cendoya E, Nichea MJ, Monge MDP, Zachetti VGL, Chiacchiera SM, Ramirez ML Abstract Fumonisin occurrence was reported in wheat grains and F. proliferatum has been suggested to be the main contributor to its presence in wheat. Thus, a survey was performed in order to study the impact of four commercial fungicides used in Argentina for controlling Fusarium head blight disease (epoxiconazole+metconazole, tebuconazole, pyraclostrobin+epoxiconazole, and prothioconazole) on growth and fumonisin production of two F. proliferatum strains in relation to water activity (aW; 0.99, 0.97, 0.95) and temperature (15°C...
Source: Revista Argentina de Microbiologia - July 2, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Microscopic and PCR-based detection of microsporidia spores in human stool samples.
In this study, we performed microscopy and nested PCR techniques with PCR product sequencing to detect E. bieneusi in human stool samples. These techniques, if applied together, might prove useful for diagnosis and future epidemiological studies of intestinal microsporidiosis in Argentina. PMID: 32595002 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - July 2, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Cladosporium species causing "Cladosporium rot" on "Bosc" pear fruit in Argentina.
The objective of this work was to determine the Cladosporium species that caused the above mentioned symptoms. The morphological and molecular analyses of the partial sequence of the actin gene (ACT) supported the identification. Cladosporium macrocarpum, Cladosporium subtilissimum and Cladosporium floccosum were determined as the species involved in the disease. Although Cladosporium has been reported to cause pear rot, this is the first report to identify these species as causal agents of this fruit disease. PMID: 32564912 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - June 23, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Virulence genes of Escherichia coli in diarrheic and healthy calves.
This study reports updated data about the virulence profiles of E. coli in dairy calves in Uruguay. A large number of adhesins and toxin genes were detected. Our results demonstrate that E. coli from bovine feces has diarrheagenic and extraintestinal profiles although other NCD risks factors may contribute to the disease outcome. PMID: 32553726 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - June 20, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Statistical approach to Trichinella infection in horses handled by rural slaughterhouses across five distinctive socioeconomic regions in Mexico.
Authors: Solís-Hernández D, Saucedo-Gutiérrez KL, Meza-Lucas A, Gómez-de-Anda FR, Medina-Lerena MS, García-Rodea R, Corona-Souza MT, Pérez-Ramírez MÁ, Vega-Sánchez V, de-la-Rosa-Arana JL Abstract This work aimed to investigate the prevalence of Trichinella infection in horses (Equus ferus caballus) handled by rural slaughterhouses across five distinctive socioeconomic regions in Mexico. Serum samples were obtained by non-probabilistic convenience sampling in the Eastern, Southern Central and Western regions (100 samples of each). Additionally, muscle ti...
Source: Revista Argentina de Microbiologia - June 9, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Nematicidal effect of an Argentine strain of Photorhabdus laumondi laumondi (Enterobacteriaceae) on the free-living nematode Panagrellus redivivus (Rhabditidae: Panagrolaimidae).
Authors: Salas A, Achinelly MF, Sauka DH PMID: 32493573 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - June 6, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Dynamics of neutralizing antibodies against Bovine respiratory syncytial virus in a dairy herd from Santa Fe Province, Argentina.
Authors: Ferella A, Aguirreburualde MSP, Sammarruco A, Parreño V, Santos MJD, Mozgovoj M Abstract Bovine respiratory syncytial virus (BRSV) is one of the most relevant agents responsible for respiratory disease in cattle from both dairy and beef farms. BRSV is spread by horizontal contact causing a constant presence of seropositive animals that favors viral circulation throughout the year. Moreover, reinfections with BRSV are frequent between animals regardless of their age as BRSV does not confer long-lasting protective immunity. Several studies have demonstrated the circulation of BRSV in cattle from diffe...
Source: Revista Argentina de Microbiologia - June 5, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Life expectancy at birth. Microbiology contributions and challenges].
Authors: Lodeiro AR PMID: 32354644 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - May 3, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Incorporation of the rapid HIV test in a sexually-transmitted disease clinic in Buenos Aires: Dramatic increase in the frequency of HIV diagnosis.
Authors: Morando N, Gallo Vaulet ML, Melgar A, Rodríguez Fermepin M, Casco R, Pando MLÁ Abstract Improving access to diagnosis constitutes a key step in the control of the Human immunodeficiency virus (HIV)/AIDS epidemic. Rapid testing is increasingly gaining interest as a powerful diagnostic tool to achieve this goal. The purpose of this study was to implement the rapid HIV test (RHT) in a clinical setting in order to evaluate its effectiveness in increasing HIV diagnosis and patient linkage to the healthcare system. The RHT was offered to all patients attending a sexually-transmitted disease clinic ...
Source: Revista Argentina de Microbiologia - April 12, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Bacteremia and sepsis by Arcanobacterium haemolyticum in a young immunocompetent patient.
We report the case of a twenty-year-old immunocompetent male patient presenting to the emergency room with pharyngitis and fever. Blood cultures were drawn and Arcanobacterium haemolyticum (rough biotype) was recovered. The presence of the arcanolysin gene was investigated at the molecular level and the upstream region was amplified and sequenced in order to correlate it with the smooth or rough biotype. Although the isolate was susceptible to penicillin, vancomycin and gentamicin, empirical treatments first with amoxicillin/clavulanic acid (1g/12h) and then with ceftriaxone (1g/12h) failed and the infection evolved to sep...
Source: Revista Argentina de Microbiologia - March 25, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Sporothrix brasiliensis: A growing hazard in the Northern area of Buenos Aires Province?
Authors: Etchecopaz A, Scarpa M, Mas J, Cuestas ML PMID: 32192862 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - March 21, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Syphilis seroprevalence among HIV-infected males in Istanbul, Turkey.
Authors: Köksal MO, Beka H, Evlice O, Çiftçi S, Keskin F, Başaran S, Akgül B, Eraksoy H, Ağaçfidan A Abstract Syphilis has become a serious issue for human immunodeficiency virus (HIV)-infected patients worldwide in recent years; however, the studies related to HIV coinfection and syphilis reinfections in Istanbul, Turkey, are limited. Our objective was to determine the seroprevalence of syphilis among HIV-infected men in the city which has one of the highest HIV prevalence rates in Turkey. Two hundred and forty four (244) HIV-positive men were evaluated at Istanbul Medical Faculty,...
Source: Revista Argentina de Microbiologia - March 18, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Genetic characterization of rice endophytic bacteria (Oryza sativa L.) with antimicrobial activity against Burkholderia glumae].
In conclusion, strains of the genus Bacillus and Burkholderia are potential biocontrol agents against B. glumae. PMID: 32147231 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - March 11, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Optimization of production of xylanases with low cellulases in Fusarium solani by means of a solid state fermentation using statistical experimental design.
In this study, the ability of the fungus Fusarium solani to produce extracellular xylanases with low cellulolytic activity was optimized by Box Wilson design. The best culture conditions were determined to obtain a crude enzyme preparation with significant xylanolytic activity and little cellulolytic activity. In most treatments, the xylanolytic activity was higher than the cellulolytic activity. A negative effect on the production of endoxylanases, β-xylosidases and endocellulases was observed with the increasing of xylan concentration. Increasing the incubation time adversely affected the production of endocellulase...
Source: Revista Argentina de Microbiologia - March 10, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Emerging and re-emerging viruses: A new challenge for global health in this millennium].
Authors: Cuestas ML, Minassian ML PMID: 32115285 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - March 4, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[First isolation of Leptospira borgpetersenii serovar Hardjo type Hardjo Bovis from a clinical case in cattle in Argentina].
Authors: Koval AA, Brihuega BF, Grune Loffler S, López S, Saint Martin M, Lagioia GG, Insaugarat JR Abstract We here describe the first isolation and molecular typing of Leptospira borgpetersenii serovar Hardjo Bovis in Argentina, obtained from urine of aborted cows from a breeding herd located in Saladillo, Buenos Aires Province. The abortions occurred in coincidence with important floods with many cows presenting suspicious serological titers and subsequent seroconversion. The percentage of abortions was 3.5% of a herd of 1700 cows and the microorganism was isolated from 7 of the 20 urine samples obtained....
Source: Revista Argentina de Microbiologia - February 6, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Antagonic and plant growth-promoting effects of bacteria isolated from mine tailings at El Fraile, Mexico.
The objective of this study was to isolate bacteria detected in the mine tailings at El Fraile-Taxco, focusing on those in the soil from the rhizosphere, the inner tissue of the root, leachate, and water, which have the potential to promote plant growth. The ability of the isolated bacteria to promote plant growth was evaluated in vitro. Of the 151 morphotypes isolated, 51% fix nitrogen, 12% dissolve phosphates, and 12%, 39.7%, and 48.3% produce indole acetic acid, gibberellins, and siderophores, respectively. In addition, 66.7% were observed to produce lytic enzymes, such as proteases, celluloses, lipases, esterases, and ...
Source: Revista Argentina de Microbiologia - January 28, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Full characterization of an IncR plasmid harboring qnrS1 recovered from a VIM-11-producing Pseudomonas aeruginosa.
The objective of this study was to report the simultaneous presence of qnrS and blaVIM-11 in P. aeruginosa, and to characterize the qnrS-harboring plasmid. Thirty-eight carbapenem-resistant P. aeruginosa isolates were recovered from a hospital in Buenos Aires during 2012. Screening for MBL was assessed by the double disk synergy test using EDTA and carbapenem discs. Plasmid DNA extraction was performed by a method using phenol-chloroform. PCR followed by sequencing was carried out to determine each MBL and PMQR allele. PCR-BseGI-RFLP was performed to detect aac-(6')-Ib-cr. The gyrA-QRDR was sequenced in those PMQR-harborin...
Source: Revista Argentina de Microbiologia - January 28, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Lactobacillus pentosus ABHEAU-05: An in vitro digestion resistant lactic acid bacterium isolated from a traditional fermented Mexican beverage.
This study is the first report of a lactic acid bacterium with in vitro digestion resistance isolated from pineapple tepache. The survival of L. pentosus ABHEAU-05 in a symbiotic medium was proven using fermented milk enriched with inulin. The in vitro digestion-resistant probiotic activity of lactobacilli was measured through analysis of pH and proteolysis. Results showed that L. pentosus grew properly in fermented milk; therefore, this microorganism could be used in the manufacture of this kind of products. The concentration of L. pentosus reached up to 8.5logCFU/ml after 40h of fermentation. In addition, the production ...
Source: Revista Argentina de Microbiologia - January 24, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Microscopic agglutination test: Variables that affect the time of serological confirmation of human leptospirosis cases.
Authors: Scialfa E, Rivero M, Moreno S, Ortiz M, Bongiorno F Abstract Leptospirosis is considered an endemic disease in Buenos Aires province, Argentina, with human cases reported annually from rural and urban areas. The aim of the study was to describe the variables that influence the delay in the serological confirmation of leptospirosis in human cases (period 2006-2014) from Buenos Aires province. Sixty-four percent (64%) of cases could be confirmed by microscopic agglutination test (MAT) with the first sample. The time of confirmation of the human leptospirosis cases was on average 21 days from the onset of the...
Source: Revista Argentina de Microbiologia - January 23, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Frequency and geographical distribution of genotypes and mating types of Cryptococcus neoformans and Cryptococcus gattii species complexes in Argentina.
In conclusion, this study shows that genotype frequencies seem to vary among regions in Argentina and reveals a relatively high frequency of rare hybrids in the Northwest region. Further regional clinical and environmental studies may help to elucidate if those variations in frequencies are associated with the existence of regional ecological niches or any other regional factors. PMID: 31948732 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - January 18, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Distribution of PCV13 and PPSV23 Streptococcus pneumoniae serotypes in Argentinean adults with invasive disease, 2013-2017.
Authors: Zintgraff J, Fossati S, Pereira CS, Veliz O, Regueira M, Moscoloni MA, Irazu L, Lara C, Napoli D, Argentina Spn Working Group Abstract Streptococcus pneumoniae is a major cause of severe invasive disease associated with high mortality and morbidity worldwide. To identify the serotypes most commonly associated with infection in adults in Argentina, 791 pneumococcal isolates from 56 hospitals belonging to 16 provinces and Buenos Aires city were serotyped. The isolates were submitted as part of a National Surveillance Program for invasive pneumococcal disease in adults, which started in 2013. Serotypes 3, 8, ...
Source: Revista Argentina de Microbiologia - January 15, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Evaluation of a rapid diagnostic test for the detection of Streptococcus pyogenes in invasive infections.
This study demonstrates the potential use of a rapid immunochromatographic method directly from clinical samples and positive blood cultures. PMID: 31926748 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - January 14, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Spatial distribution of anthracnose (Colletotrichum gloeosporioides Penz) in avocado in the State of Mexico, Mexico].
Authors: Tapia Rodríguez A, Ramírez Dávila JF, Salgado Siclán ML, Castañeda Vildózola Á, Maldonado Zamora FI, Lara Díaz AV Abstract Persea americana is a species of great nutritional and economic importance for Mexico, however, like any other agricultural crop, it is affected by pests and diseases that limit its worldwide commercialization. The phytopathogenic fungus Colletotrichum gloeosporioides is the causative agent of anthracnose in avocado and manifests itself in the early stages of fruit development as well as in post-harvest and storage, under conditio...
Source: Revista Argentina de Microbiologia - January 14, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Diagnosis of Cunninghamella bertholletiae Stadel].
Authors: Vieille Oyarzo P, Cruz Choappa R PMID: 31928833 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - January 14, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Infectivity by nematode-bacteria association on the potato weevil Phyrdenus muriceus.
Authors: Eliceche DP, Rusconi JM, Rosales MN, Salas A, Achinelly MF PMID: 31928834 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - January 14, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Macrolide-lincosamide-streptogramin B resistance phenotypes and their associated genotypes in Staphylococcus aureus isolates from a tertiary level public hospital of Uruguay.
This study was undertaken to investigate the resistance phenotypes to macrolide-lincosamide-streptogramin B (MLSB) antibiotics and their associated genotypes in isolates of Staphylococcus aureus. We analyzed one hundred, consecutive, non-duplicate isolates (methicillin-susceptible MSSA, n=53 and methicillin-resistant MRSA, n=47) obtained from various clinical samples between July 2012 to December 2013. The resistance profile to MLSB antibiotics was determined by phenotypic methods and the resistance genes were detected by PCR assays. All of the isolates were subjected to pulsed-field gel electrophoresis (SmaI-PFGE). The ov...
Source: Revista Argentina de Microbiologia - January 14, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Isolation of culturable mycota from Argentinean soils exposed or not-exposed to pesticides and determination of glyphosate tolerance of fungal species in media supplied with the herbicide.
This study provides valuable data for further studies that would allow to know the metabolic capacity of these fungal species that can be potential candidates for GP removal from contaminated environments. PMID: 31928836 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - January 14, 2020 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Burkholderia cepacia complex: 11 years of surveillance in patients with Cystic Fibrosis in Posadas, Argentina.
This report represents the first systematic study of Burkholderia infections in our CF population since beginning of monitoring and treatment and highlights the importance of continued longitudinal studies. PMID: 31879049 [PubMed - as supplied by publisher] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - December 29, 2019 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

First characterization of K. pneumoniae ST11 clinical isolates harboring blaKPC-3 in Latin America.
Authors: Garcia-Fulgueiras V, Zapata Y, Papa-Ezdra R, Ávila P, Caiata L, Seija V, Rojas Rodriguez AE, Magallanes C, Márquez Villalba C, Vignoli R Abstract Antimicrobial resistance due to carbapenemase production in Enterobacteriaceae clinical isolates is a global threat. Klebsiellapneumoniae harboring the blaKPC gene is one of the major concerns in hospital settings in Latin America. The aim of this study was to characterize the antibiotic resistance mechanisms and to typify four carbapenem-resistant K. pneumoniae clinical isolates from the city of Manizales, Colombia. We identified blaKPC-3 in all fo...
Source: Revista Argentina de Microbiologia - December 27, 2019 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Compatibility between Leptolegnia chapmanii and diflubenzuron and neem oil for the control of Aedes aegypti.
Authors: Páramo MER, Falvo M, García J, Lastra CCL Abstract Leptolegnia chapmanii is pathogenic to mosquito larvae. The compatibility between L. chapmanii and two insect growth regulators (IGR), diflubenzuron and neem oil, was evaluated. L. chapmanii was grown on culture media containing different concentrations of each IGR. The mycelial growth was significantly reduced with the highest concentrations of IGR (F6,98=268, p0.05) and the larval mortality of Aedes aegypti (F6,56=0.95, p>0.05) were not significantly different among treatments. Furthermore, the percentage of adult emergence in the presen...
Source: Revista Argentina de Microbiologia - December 25, 2019 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Phaeohyphomycosis by Exserohilum rostratum in a pediatric patient with acute lymphoblastic leukemia after bone marrow transplantation].
Authors: Pena Amaya P, Flores A, Christmann A, Detoni D, Drelichman G, Soberón B, Fernández Escobar N, Córdoba S, Vazquez M Abstract The genus Exserohilum consists of dematiaceous or darkly pigmented fungi. Most of the species included in this genus are phytopathogens, saprobes and only three of these species would be pathogenic to humans: Exserohilumrostratum, Exserohilumlongirostratum and Exserohilummcginnisii. Localized and systemic infections have been reported both in immunocompetent and immunosuppressed patients. A clinical case of cutaneous infection by E. rostratum in an immunocompromis...
Source: Revista Argentina de Microbiologia - December 25, 2019 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Elimination of indigenous malaria in Argentina: history of a struggle and the risk of forgetting].
Authors: Alba Soto C PMID: 31787139 [PubMed - in process] (Source: Revista Argentina de Microbiologia)
Source: Revista Argentina de Microbiologia - December 5, 2019 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[A comparative study of commercial ELISAs for antibody detection in the diagnostic investigation of Neospora caninum-associated abortion in dairy cattle herds in Uruguay].
In this study we propose a comparative seroepidemiological approach for the diagnosis of abortion by N. caninum in dairy cattle. Samples from 12 to 93 cows/heifers with and without recent history of abortion (cases and controls) in four commercial dairy farms were tested. The ratio of controls to the cases tested varied from 1:1 to 4.6:1. All samples (n=230) were analyzed by three commercial ELISA kits for the detection of anti-N. caninum antibodies. In all four dairy farms, the proportion of seropositive cows and/or heifers per kit was significantly higher in the cases than in the controls (Odds Ratios=5.13 to 36, p=0.000...
Source: Revista Argentina de Microbiologia - December 5, 2019 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Bacillus cereus bacteremia in a patient with an abdominal stab wound.
We describe here a case of bacteremia caused by B. cereus in a previously healthy young woman admitted to the intensive care unit following emergency surgery due to a penetrating abdominal stab wound and subsequent hepatic lesion. She developed fever during admission and cultures were taken. B. cereus was isolated in blood and hepatic fluid collection cultures. Treatment was adjusted according to the isolate, with good clinical results. It is important to highlight the pathogenic potential of this microorganism and not underestimate it as a contaminant when it is isolated from blood samples. PMID: 31791818 [PubMed - as...
Source: Revista Argentina de Microbiologia - December 5, 2019 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

[Bioinformatics of next generation sequencing in clinical microbiology diagnosis].
Authors: Hernández M, Quijada NM, Rodríguez-Lázaro D, Eiros JM Abstract Massive parallel sequencing (High-Throughput Sequencing [HTS]) allows to read millions or billions of DNA sequences or fragments (reads) in parallel and is revolutionizing microbiology research, moving from laboratory methods to computed-assisted analyses, with the compelling use of Bioinformatics. The time and cost reduction in studies on the microbiota, microbiome and metagenome, allows to rapidly progress in diagnosis, taxonomy, epidemiology, comparative genomics, virulence, discovery of genes or variants of interest and...
Source: Revista Argentina de Microbiologia - December 2, 2019 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Prevalence of Campylobacter jejuni and Campylobacter coli from broilers at conventional and kosher abattoirs and retail stores.
Authors: Guirin GF, Brusa V, Adriani CD, Leotta GA Abstract We studied and compared the prevalence of Campylobacter jejuni and Campylobacter coli in chicken carcasses from conventional and kosher broiler abattoirs and retail stores. The prevalence of thermotolerant Campylobacter-positive carcasses was 94.0 (kosher) and 32.0% (conventional) (p
Source: Revista Argentina de Microbiologia - December 2, 2019 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research

Human infection with Pseudoterranova cattani by ingestion of "ceviche" in Buenos Aires, Argentina.
Human infection with Pseudoterranova cattani by ingestion of "ceviche" in Buenos Aires, Argentina. Rev Argent Microbiol. 2019 Nov 27;: Authors: Menghi CI, Gatta CL, Arias LE, Santoni G, Nicola F, Smayevsky J, Degese MF, Krivokapich SJ Abstract Anisakidosis is an infection caused by larval nematodes that belong to several genera within the family Anisakidae. Anisakidosis has about 20000 cases reported to date, the vast majority (90%) in Japan. Usually, human anisakiosis is more common than human pseudoterranovosis in Japan and Europe, although in North America Pseudoterranova spp. is the more ...
Source: Revista Argentina de Microbiologia - December 2, 2019 Category: Microbiology Tags: Rev Argent Microbiol Source Type: research