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Source: Medical and Veterinary Entomology

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Total 505 results found since Jan 2013.

Vectorial competence of Amblyomma tonelliae to transmit Rickettsia rickettsii
Medical and Veterinary Entomology, Page 410-415, March 2018.
Source: Medical and Veterinary Entomology - September 28, 2016 Category: Veterinary Research Source Type: research

Demographic effects of deltamethrin resistance in the Chagas disease vector Triatoma infestans
The objectives of the present study were to describe the demographic consequences of deltamethrin resistance in T. infestans and to establish possible target stages for chemical control in susceptible and resistant colonies. A stage‐classified matrix model was constructed based on the average stage length for susceptible, resistant and reciprocal matings' progeny. The differences between colonies were analysed by prospective and retrospective analysis. The life table parameters indicated reduced fecundity, fertility and population growth in resistant insects. The retrospective analysis suggested the latter was associated...
Source: Medical and Veterinary Entomology - September 27, 2016 Category: Veterinary Research Authors: M. D. GERMANO, M. I. PICOLLO Tags: Original Article Source Type: research

Effects of domestic chemical stressors on expression of allergen genes in the European house dust mite
Abstract The expression of allergen genes in house dust mites is influenced by temperature and relative humidity, but little is known of the impacts of other environmental factors that may alter the repertoire of allergens released by mites in home microhabitats. Bioassays were conducted in concave microscope slides in combination with real‐time quantitative polymerase chain reaction (RT‐qPCR) to analyse gene expression of 17 allergens of Dermatophagoides pteronyssinus (Acariformes: Pyroglyphidae) exposed to three chemical stressors that can be present in domestic environments. Short‐term exposure (5–12 days) to di...
Source: Medical and Veterinary Entomology - August 31, 2016 Category: Veterinary Research Authors: J. C. VIDAL ‐QUIST, F. ORTEGO, B. N. LAMBRECHT, P. CASTAÑERA, P. HERNÁNDEZ‐CRESPO Tags: Short Communication Source Type: research

Modulatory effects of interferon ‐γ and interleukin‐4 on cellular immune responses against Hypoderma lineatum antigens
In conclusion, exogenous IFN‐γ and IL‐4 were unable to counteract the suppressor effects of H. lineatum antigens.
Source: Medical and Veterinary Entomology - August 31, 2016 Category: Veterinary Research Authors: E. CABANELAS, C. M. L ÓPEZ, P. DÍAZ, A. PÉREZ ‐CREO, P. MORRONDO, P. DÍEZ ‐BAÑOS, R. PANADERO Tags: Short Communication Source Type: research

Mosquitoes of field and forest: the scale of habitat segregation in a diverse mosquito assemblage
This study examined the importance of habitat, habitat edges, and the scale at which mosquito abundance and diversity vary in a rural landscape by trapping along transects from grassland areas into forest patches. Significant patterns of vector diversity and distinct mosquito assemblages across habitats were found. The scale of individual species' responses to habitat edges was often dramatic, with several species rarely straying even 10 m from the edge. The present results suggest blood‐seeking mosquito species are faithful to certain habitats, which has consequences for patterns of vector diversity and risk for pathoge...
Source: Medical and Veterinary Entomology - August 31, 2016 Category: Veterinary Research Authors: M. H. REISKIND, R. H. GRIFFIN, M. S. JANAIRO, K. A. HOPPERSTAD Tags: Original Article Source Type: research

Vision in the common bed bug Cimex lectularius L. (Hemiptera: Cimicidae): eye morphology and spectral sensitivity
Abstract Bed bugs as pests of public health importance recently experienced a resurgence in populations throughout the U.S. and other countries. Consequently, recent research efforts have focused on improving understanding of bed bug physiology and behaviour to improve management. While few studies have investigated the visual capabilities of bed bugs, the present study focused specifically on eye morphology and spectral sensitivity. A 3‐D imaging technique was used to document bed bug eye morphology from the first instar through adult and revealed morphological characteristics that differentiate the common bed bug from ...
Source: Medical and Veterinary Entomology - August 31, 2016 Category: Veterinary Research Authors: C. A. MCNEILL, S. A. ALLAN, P. G. KOEHLER, R. M. PEREIRA, E. N. I. WEEKS Tags: Original Article Source Type: research

Impact of white ‐tailed deer on the spread of Borrelia burgdorferi
This study examines the pathogen prevalence rate of Borrelia in adult Ixodes scapularis (Ixodida: Ixodidae), the black‐legged tick, collected from white‐tailed deer and compares it with pathogen prevalence rates in adult ticks gathered by dragging vegetation in two contiguous counties west of the Hudson Valley in upstate New York. In both Broome and Chenango Counties, attached and unattached ticks harvested from white‐tailed deer had significantly lower prevalences of B. burgdorferi than those collected from vegetation. No attached ticks on deer (n = 148) in either county, and only 2.4 and 7.3% of unattached ti...
Source: Medical and Veterinary Entomology - August 31, 2016 Category: Veterinary Research Authors: A. ROOME, L. HILL, V. AL ‐FEGHALI, C. G. MURNOCK, J. A. GOODSELL, R. SPATHIS, R. M. GARRUTO Tags: Original Article Source Type: research

Effects of four commercial fungal formulations on mortality and sporulation in house flies (Musca domestica) and stable flies (Stomoxys calcitrans)
Abstract The house fly Musca domestica L. (Diptera: Muscidae) and stable fly Stomoxys calcitrans (L.) (Diptera: Muscidae) are major pests of livestock. Biological control is an important tool in an integrated control framework. Increased mortality in filth flies has been documented with entomopathogenic fungi, several strains of which are commercially available. Three strains of Beauveria bassiana (Balsamo‐Crivelli) Vuillemin (Hypocreales: Cordycipitaceae) and one strain of Metarhizium brunneum (Petch) (Hypocreales: Clavicipitaceae) were tested in commercial formulations for pathogenicity against house flies and stable f...
Source: Medical and Veterinary Entomology - August 31, 2016 Category: Veterinary Research Authors: E. N. I. WEEKS, E. T. MACHTINGER, S. A. GEZAN, P. E. KAUFMAN, C. J. GEDEN Tags: Original Article Source Type: research

First record of Stegomyia albopicta (=  Aedes albopictus) in Morocco: a major threat to public health in North Africa?
Abstract. The Asian tiger mosquito Stegomyia albopicta (= Aedes albopictus) (Diptera: Culicidae), native to Asian forests, is a nuisance mosquito and is responsible for the transmission of arboviruses of public health importance, such as dengue, chikungunya and Zika viruses. It has colonized parts of all continents, except Antarctica, over the past 30–40 years. However, to date, the only records of S. albopicta in North Africa refer to occasional collections in 2010 and 2014 in Algeria. In early September 2015, S. albopicta larvae and adults were collected in a district of Rabat, Morocco. Morphological identifica...
Source: Medical and Veterinary Entomology - August 31, 2016 Category: Veterinary Research Authors: A. BENNOUNA, T. BALENGHIEN, H. EL RHAFFOULI, F. SCHAFFNER, C. GARROS, L. GARD ÈS, Y. LHOR, S. HAMMOUMI, G. CHLYEH, O. FASSI FIHRI Tags: Short Communication Source Type: research

The recombinant protein rSP03B is a valid antigen for screening dog exposure to Phlebotomus perniciosus across foci of canine leishmaniasis
In this study, sera were sampled from naturally exposed dogs from distant regions, including Campania (southern Italy), Umbria (central Italy) and the metropolitan Lisbon region (Portugal), where P. perniciosus is the unique or principal vector species. Sera were screened for anti‐P. perniciosus antibodies using SGH and 43‐kDa yellow‐related recombinant protein (rSP03B). A robust correlation between antibodies recognizing SGH and rSP03B was detected in all regions, suggesting substantial antigenic cross‐reactivity among different P. perniciosus populations. No significant differences in this relationship were detec...
Source: Medical and Veterinary Entomology - August 31, 2016 Category: Veterinary Research Authors: T. KOSTALOVA, T. LESTINOVA, C. MAIA, P. SUMOVA, M. VLKOVA, L. WILLEN, N. POLANSKA, E. FIORENTINO, A. SCALONE, G. OLIVA, F. VERONESI, J. M. CRIST ÓVÃO, O. COURTENAY, L. CAMPINO, L. GRADONI, M. GRAMICCIA, P. VOLF Tags: Short Communication Source Type: research

Vectorial competence of Amblyomma tonelliae to transmit Rickettsia rickettsii
This study demonstrates the vectorial competence of A. tonelliae to transmit R. rickettsii. These results have epidemiological relevance because A. tonelliae is one of the tick species most likely to infest humans in Argentina, including in areas in which RMSF has been reported.
Source: Medical and Veterinary Entomology - August 31, 2016 Category: Veterinary Research Authors: E. L. TARRAGONA, J. F. SOARES, F. B. COSTA, M. B. LABRUNA, S. NAVA Tags: Original Article Source Type: research

Population dynamics of the cattle tick Rhipicephalus (Boophilus) microplus in a subtropical subhumid region of Argentina for use in the design of control strategies
Abstract The population dynamics of Rhipicephalus microplus (Ixodida: Ixodidae) in northwest Argentina was analysed to support the design of strategic methods for its control. Both parasitic and non‐parasitic phases were studied. The seasonal activity of R. microplus in its parasitic phase was characterized by three peaks in abundance: the first in mid–late spring; the second in summer, and the third in autumn. The non‐parasitic phase of R. microplus was characterized by a long total non‐parasitic period observed after exposures of females from mid‐summer to early autumn, a short total non‐parasitic period ...
Source: Medical and Veterinary Entomology - August 31, 2016 Category: Veterinary Research Authors: J. T. CANEVARI, A. J. MANGOLD, A. A. GUGLIELMONE, S. NAVA Tags: Original Article Source Type: research

Cuticle hydrolysis in four medically important fly species by enzymes of the entomopathogenic fungus Conidiobolus coronatus
Abstract. Entomopathogenic fungi infect insects via penetration through the cuticle, which varies remarkably in chemical composition across species and life stages. Fungal infection involves the production of enzymes that hydrolyse cuticular proteins, chitin and lipids. Host specificity is associated with fungus–cuticle interactions related to substrate utilization and resistance to host‐specific inhibitors. The soil fungus Conidiobolus coronatus (Constantin) (Entomophthorales: Ancylistaceae) shows virulence against susceptible species. The larvae and pupae of Calliphora vicina (Robineau‐Desvoidy) (Diptera: Calliphor...
Source: Medical and Veterinary Entomology - August 31, 2016 Category: Veterinary Research Authors: M. I. BOGU Ś, E. WŁÓKA, A. WROŃSKA, A. KACZMAREK, M. KAZEK, K. ZALEWSKA, M. LIGĘZA ‐ ŻUBER, M. GOŁĘBIOWSKI Tags: Original Article Source Type: research

Variations in attack behaviours between Glossina palpalis gambiensis and G. tachinoides in a gallery forest suggest host specificity
This study showed that these sympatric species had different attack behaviours to humans, which is not the case with the target. The implications of these findings are discussed.
Source: Medical and Veterinary Entomology - August 11, 2016 Category: Veterinary Research Authors: E. SALOU, J. B. RAYAISSE, D. KABA, V. DJOHAN, W. YONI, I. BARRY, F. DOFINI, J. BOUYER, P. SOLANO Tags: Original Article Source Type: research

New repellent effective against African malaria mosquito Anopheles gambiae: implications for vector control
Abstract Anopheles gambiae Giles sensu stricto (Diptera: Culicidae) is a vector for Plasmodium, the causative agent of malaria. Current control strategies to reduce the impact of malaria focus on reducing the frequency of mosquito attacks on humans, thereby decreasing Plasmodium transmission. A need for new repellents effective against Anopheles mosquitoes has arisen because of changes in vector behaviour as a result of control strategies and concern over the health impacts of current repellents. The response of A. gambiae to potential repellents was investigated through an electroantennogram screen and the most promising ...
Source: Medical and Veterinary Entomology - August 5, 2016 Category: Veterinary Research Authors: C. N. HODSON, Y. YU, E. PLETTNER, B. D. ROITBERG Tags: Original Article Source Type: research