Ecologic Studies of Venezuelan Encephalitis Virus in Southeastern México

Scherer, William F.; Dickerman, Robert W.; Jordan, Elaine; Saidi, S; Zárate, M. L.; Ventura, A K

doi:10.4269/ajtmh.1971.20.740

Cited by 4 publications

(3 citation statements)

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“…The five VEEV‐seropositive species were all first reports for Trinidad, but similar findings have been previously reported in Brazil, Guatemala and Mexico (Scherer et al., ; Correa‐Giron et al., ; Calisher et al., ; Ubico and McLean, ). A significantly higher percentage of VEEV‐seropositive bats roosted in close association with people (e.g.…”

Section: Discussionsupporting

confidence: 84%

Seroepidemiology of Selected Alphaviruses and Flaviviruses in Bats in Trinidad

Thompson

Auguste

Rosa

et al. 2014

Zoonoses and Public Health

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A serosurvey of antibodies against selected flaviviruses and alphaviruses in 384 bats (representing 10 genera and 14 species) was conducted in the Caribbean island of Trinidad. Sera were analysed using epitope-blocking enzyme-linked immunosorbent assays (ELISAs) specific for antibodies against West Nile virus (WNV), Venezuelan equine encephalitis virus (VEEV) and eastern equine encephalitis virus (EEEV), all of which are zoonotic viruses of public health significance in the region. Overall, the ELISAs resulted in the detection of VEEV-specific antibodies in 11 (2.9%) of 384 bats. Antibodies to WNV and EEEV were not detected in any sera. Of the 384 sera, 308 were also screened using hemagglutination inhibition assay (HIA) for antibodies to the aforementioned viruses as well as St. Louis encephalitis virus (SLEV; which also causes epidemic disease in humans), Rio Bravo virus (RBV), Tamana bat virus (TABV) and western equine encephalitis virus (WEEV). Using this approach, antibodies to TABV and RBV were detected in 47 (15.3%) and 3 (1.0%) bats, respectively. HIA results also suggest the presence of antibodies to an undetermined flavivirus(es) in 8 (2.6%) bats. Seropositivity for TABV was significantly (P<0.05; χ2) associated with bat species, location and feeding preference, and for VEEV with roost type and location. Differences in prevalence rates between urban and rural locations were statistically significant (P<0.05; χ2) for TABV only. None of the aforementioned factors was significantly associated with RBV seropositivity rates.

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Section: Discussionsupporting

confidence: 84%

Seroepidemiology of Selected Alphaviruses and Flaviviruses in Bats in Trinidad

Thompson

Auguste

Rosa

et al. 2014

Zoonoses and Public Health

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“…tarsalis in Durango in the northwest (Sudia et al 1975), Venezuelan equine encephalomyelitis virus from Cx. coronator in Veracruz State (Scherer et al 1971), and heartworm, Dirofilaria immitis , from Ae. taeniorhynchus in the Yucatán Peninsula (Manrique-Saide et al 2010).…”

Section: Discussionmentioning

confidence: 99%

Urban Mosquito Fauna in Mérida City, México: Immatures Collected from Containers and Storm-Water Drains/Catch Basins

Baak-Baak

Arana-Guardia

Cigarroa-Toledo

et al. 2014

Southwestern Entomologist

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We examined the species composition and temporal occurrence of immature mosquitoes in containers and storm-water drains/catch basins from November 2011 to June 2013 in Mérida City, México. A wide range of urban settings were examined, including residential premises, vacant lots, parking lots, and streets or sidewalks with storm-water drains/catch basins. In total, 111,776 specimens of 15 species were recorded. The most commonly collected species were Aedes (Stegomyia) aegypti (L.) (n = 60,961) and Culex quinquefasciatus Say (45,702), which together accounted for 95.4% of the immatures collected. These species were commonly encountered during both rainy and dry seasons, whereas most other mosquito species were collected primarily during the rainy season. Other species collected were Aedes (Howardina) cozumelensis Diaz Najera, Aedes (Ochlerotatus) taeniorhynchus (Wiedemann), Aedes (Ochlerotatus) trivittatus (Coquillett), Culex coronator Dyar and Knab, Culex interrogator Dyar and Knab, Culex lactator Dyar and Knab, Culex nigripalpus Theobald, Culex salinarius Coquillett, Culex tarsalis Coquillett, Culex thriambus Dyar, Haemagogus equinus Theobald, Limatus durhamii Theobald, and Toxorhynchites rutilus (Coquillett). The greatest number of species was recorded from vacant lots (n = 11), followed by storm-water drains/catch basins (nine) and residential premises (six). Our study demonstrated that the heterogeneous urban environment in Mérida City supports a wide range of mosquito species, many of which are nuisance biters of humans and/or capable of serving as vectors of pathogens affecting humans or domestic animals. We also briefly reviewed the medical importance of the encountered mosquito species.

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“…In its native range, Cx. coronator been found to be naturally infected with the St. Louis encephalitis (Hammon et al 1943, Anderson et al 1957) and Venezuelan equine encephalitis (Scherer et al 1971, Burguete et al 1973) virus. Examinations within the United States have led to the possibility of this species as a West Nile virus threat (Centers for Disease Control [CDC] 2005).…”

mentioning

confidence: 99%

Interspecific Competition of a New Invasive Mosquito,Culex coronator, and Two Container Mosquitoes,Aedes albopictusandCx. quinquefasciatus(Diptera: Culicidae), Across Different Detritus Environments

Yee¹,

Skiff²

2014

J Med Entomol

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The mosquito Culex coronator (Dyar and Knab) (Diptera: Culicidae) has undergone rapid range expansion in the United States since 2003, with its historical distribution in the southwest expanding eastward to the Atlantic coast. Although Cx. coronator nominally use small natural aquatic habitats for development, the use of containers (e.g., tires) makes it potentially important as container invasive. To determine the potential ecological effects of Cx. coronator on resident container species, we conducted a laboratory experiment to assess its competitive ability with two common tire-inhabiting species, Aedes albopictus (Skuse) and Culex quinquefasciatus (Say) (Diptera: Culicidae). Larvae were reared under a factorial design with each species alone and in combination (Cx. coronator + Ae. albopictus, Cx. coronator + Cx. quinquefasciatus) across three different resource environments (leaf detritus only, animal detritus only, animal + leaf). Mosquito performance (survival, adult male and female mass, and development time) was measured for each species across treatments. Female Cx. coronator developed slowest when grown with Ae. albopictus, or when grown with leaves only regardless of species combinations; similar patterns emerged for males although species effects were restricted to mass. Few differences were evident in performance for male and female Cx. coronator across detritus environments when grown with Cx. quinquefasciatus. Cx. quinquefasciatus did not vary in mass or development time in the presence of Cx. coronator compared with when grown alone. Ae. albopictus female mass was 15% lower in the presence of Cx. coronator. Survival of Cx. coronator was highest in animal and leaf detritus containers, although survival was generally lower when larvae were grown with Ae. albopictus. These findings suggest that the performance of Cx. coronator is similar to that of Cx. quinquefasciatus but it suffers in the presence of Ae. albopictus under some resource environments.

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Ecologic Studies of Venezuelan Encephalitis Virus in Southeastern México

Cited by 4 publications

References 0 publications

Seroepidemiology of Selected Alphaviruses and Flaviviruses in Bats in Trinidad

Seroepidemiology of Selected Alphaviruses and Flaviviruses in Bats in Trinidad

Urban Mosquito Fauna in Mérida City, México: Immatures Collected from Containers and Storm-Water Drains/Catch Basins

Interspecific Competition of a New Invasive Mosquito,Culex coronator, and Two Container Mosquitoes,Aedes albopictusandCx. quinquefasciatus(Diptera: Culicidae), Across Different Detritus Environments

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