Vampire bats were collected at periodic roost exterminations associated with the MALMR’s rabies eradication exercises. also screened using hemagglutination inhibition assay (HIA) for antibodies Rabbit polyclonal to Wee1 to the aforementioned viruses as well as St. Louis encephalitis virus (SLEV; which also causes epidemic Implitapide 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; 2) 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; 2) for TABV only. None of the aforementioned factors was significantly associated with RBV seropositivity rates. Keywords:Arbovirus, bats, seroepidemiology, alphavirus, flavivirus, antibodies, Trinidad == Impacts. == Bats in Trinidad were screened for selected viruses, including several of zoonotic and public health significance. Serological evidence of the past infection with VEEV, TABV, RBV and an undetermined flavivirus(es) was detected. Factors associated with bats being seropositive for TABV included bat species, location and feeding preference, and for VEEV, roost type and location were associated. == Introduction == The role of bats in the maintenance and transmission of rabies and other lyssaviruses has long been known, and they are now increasingly recognized as reservoirs for other viruses (e.g. members of the familiesParamyxoviridae,Togaviridae,Flaviviridae,Bunyaviridae,Reoviridae,Herpesviridae, Coronaviridae) that spill over or cross species barriers to infect humans, domestic animals and other wildlife (Calisher et al.,2006). Given their abundance, wide distribution, high mobility and apparent ability to harbour highly pathogenic viruses with little or no effect, bats may present a greater risk of zoonotic transmission than do other animals (Calisher et al.,2006). There is therefore considerable interest in characterizing viral diversity in these animals. Recent efforts applying metagenomic sequencing and/or consensusdegenerate PCR primers and conventional sequencing techniques to bat faecal/oral swabs and other bat tissues have resulted in the detection of a wide range of viruses including bat influenza A viruses (Tong et al.,2012), several paramyxoviruses (Drexler et al.,2012), hepaciviruses and pegiviruses (Quan et al.,2013), and close relatives of the Middle East respiratory syndrome (MERS) coronavirus (Ithete et al.,2013; Memish et al.,2013). Earlier serological studies suggest an even wider range including members of theAlphavirusandFlavivirusgenera to which some of the Implitapide most important human pathogens belong. Alphavirus antibodies previously detected in bats include eastern (EEEV), Venezuelan Implitapide (VEEV) and western (WEEV) equine encephalitis viruses (Price,1978a; McLean et al.,1979; Ubico and McLean,1995). All but the latter are associated with deadly epidemics in humans and/or horses. Included among the flaviviruses for which antibodies have been detected are important pathogenic arboviruses such as WNV, SLEV, Japanese encephalitis virus (JEV), and dengue viruses (DENV) (Price,1978a; Herbold et al.,1983; Ubico and McLean,1995; Bunde et al.,2006; AguilarSetien et al.,2008; Cui et al.,2008; MachainWilliams et al.,2013). However, it is still unclear whether bats serve as important amplification/reservoir hosts for any of these viruses. There are also several flaviviruses that are considered bat viruses, such as Rio Bravo (RBV) and Tamana bat virus (TABV), which belong to the no known vector group. Although not arthropodborne and phylogenetically distinct from SLEV (Grard et al.,2009), RBV is closely related antigenically to SLEV (Hendricks et al.,1983). TABV has only ever been isolated once, fromPteronotus parnelliiin Trinidad (Price,1978b; Implitapide de Lamballerie et al.,2002). Trinidad is also the only country to have reported the presence of RBV antibodies in bats and in humans (Price,1978b). The last survey to detect arboviral antibodies in bats in Trinidad was performed almost 40 years ago (Price,1978a,b), when sera from bats of 39 species were screened by either hemagglutination inhibition assays (HIA) or neutralization tests. Of almost 1000 bat sera tested by HIA, 0.6% of bats of four species were EEEVseropositive and 15.3% (representing 11 species) were SLEVseropositive (Price,1978a). Additionally, antibodies against RBV and TABV were detected at rates of 14.1% (125 of 887) and 8.5% (72 of 850), respectively (Price,1978b). In the present study, 384 bats (14 species) sampled from 24 locations in Trinidad were screened for antibodies to VEEV, EEEV, WEEV, SLEV, WNV, RBV and TABV using HIA and also using epitopeblocking ELISA.