Sector Agropecuario · @SecAgropecuario. Sector Agropecuario – Programa radial Agropecuario desde Con la conducción de Quique. PDF | The present study aims to improve the surveillance system of vesicular diseases in las áreas donde se mantiene el virus de estomatitis vesicular de manera secular en México, y con .. a los bovinos, porcinos y equinos, sin embargo. Anticorpos contra o vírus da estomatite vesicular em equinos de Estados das .. de varias cepas del sorotipo Indiana de estomatitis vesicular aisladas en Brasil.
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Antibodies against vesicular stomatitis virus in horses from southern, midwestern and veslcular Brazilian States. Vesicular stomatitis virus VSV is the agent of a vesicular disease that affects many animal species and may be clinically confounded with foot-and-mouth disease in ruminant and swine.
Horses are estomatltis susceptible to VSV and may serve as sentinels for virus circulation. Several samples from the Northeast and Midwest harbored high neutralizing titers, indicating a recent exposure to the virus. In contrast, samples from RS had low titers, possibly due to a past remote exposure.
These results demonstrated a relatively recent circulation of VSIV-3 in northeastern Brazilian States, confirming clinical findings and demonstrating the sanitary importance of this infection. Vesicular stomatitis virus VSV is a viral agent belonging to the order Mononegaviralesfamily Rhabdoviridaegenus Vesiculovirus. VSV naturally infects a variety of mammals including horses, cattle, swine, wild mammals and man.
In most cases, the disease is self-limiting and the clinical course lasts approximately two to three weeks REIS JR et al.
VSV isolates belong to two antigenically distinct serogroups: Vesicluar VSIV contains three subtypes: According to the ICTVthere are the least 20 additional serotypes to be characterizated. Vesicular stomatitis VS usually presents a seasonal pattern, whose incidence is usually higher in summer or in rainy seasons MASON et al. This behavior has led to the hypothesis of dissemination by winds, birds and insect vectors TESH et al.
In this sense, the virus has been isolated from mosquitoes Phlebotomus and Aedesindicating their possible role in virus transmission HAYEK et al. Animal gathering in fairs, estomatitiz, artificial insemination centers and other events seem to facilitate virus spread among susceptible animals OKUDA et al.
VS in clinically undistinguishable from foot-and-mouth disease FMDmaking critical its prompt differential diagnosis. In Brazil, positive serology to VSV has been detected in several states and different animal species.
Considering the sanitary and economical importance of the disease, this study was designed to investigate circulation of VSV-3, through serology, in horses from three Brazilian regions: Southern, Midwestern and Northeast. The present study used 3, serum samples from horses of three Brazilian regions: After complement inactivation, serum samples were diluted 1: The cultures were monitored for citopathic effect cpe for 72h.
Samples not presenting cpe were considered positive wquina VSV antibodies at the used dilution. Then, positive samples were submitted to a quantitative VN test, in which a fixed dose dstomatitis virus TCID 50 was incubated with serial 2-fold dilutions of sera, starting at 1: After 72h, the cultures were monitored for cpe and the VN titers were considered as the reciprocal of the highest serum dilution capable to prevent cpe.
The overall rate of seropositivity was High percentages of positive samples were observed in CE Since no comercial VSV vaccines are available in Brazil SINDAN,positive serological response is obviously due to a previous exposure to the virus, reflecting different levels of virus circulation in the three regions. These results indicated that CE, RN and PB States presented a broader viral activity, in contrast with the viral circulation in the Midwest and Southern regions, whose immunological reaction probably reflects a low frequency and remote viral activity.
Moderate to high antibody prevalence in horses from NE states likely reflects the environmental conditions, especially the climate, which favors the maintenance of large populations of insects especially mosquitoesprobable VSV vectors BENNETT et al.
Unfortunately, we could not test the samples against VSV Cocal because we could not obtain a virus of this serotype. Figure 1 presents the frequency and distribution of neutralizing titers by state. VSV infection is considered endemic in Brazilian northeastern States, where is estomatitks under notified.
The present results validate this status because they indicated the circulation of VSV – likely serotype 3 – in horses from this region. Residual antibodies were detected, probably reflecting remote past exposure to the virus in RS. Because cattle is the most important host species for VSV infection – which it can be confounded with FMD, leading to serious sanitary consequences – it would be interesting to investigate the presence and distribution of VSV antibodies in cattle of the studied regions.
In agreement with the estomattitis work, our data indicates that VSV is already circulating in these regions. Our results reinforce the sanitary importance of this infection, contributing for its understanding, notification and control. Comparison of virus neutralisation and enzime-linked immunosorbent assay for the identification of antibodies against vesicular stomatitis Indiana 3 gesicular. Development and evaluation of an enzime-linked immunosorbent assay for the detection, typing and subtyping of vesicular stomatitis virus.
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Estomatitis vesicular by Sharyn Monterrosa Barajas on Prezi
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