tetano
Editor, Senior Moderator
Rev Inst Med Trop Sao Paulo. 2014 Dec;56(6):487-92.
Prevalence of antibodies against influenza virus in non-vaccinated equines from the brazilian pantanal.
Silva LG1, Borges AM1, Villalobos EM2, Lara Mdo C2, Cunha EM2, Oliveira AC3, Braga IA1, Aguiar DM1.
Author information
Abstract
The prevalence of antibodies against Equine Influenza Virus (EIV) was determined in 529 equines living on ranches in the municipality of Pocon?, Pantanal area of Brazil, by means of the hemagglutination inhibition test, using subtype H3N8 as antigen. The distribution and possible association among positive animal and ranches were evaluated by the chi-square test, spatial autoregressive and multiple linear regression models. The prevalence of antibodies against EIV was estimated at 45.2% (95% CI 30.2 - 61.1%) with titers ranging from 20 to 1,280 HAU. Seropositive equines were found on 92.0% of the surveyed ranches. Equine from non-flooded ranches (66.5%) and negativity in equine infectious anemia virus (EIAV) (61.7%) were associated with antibodies against EIV. No spatial correlation was found among the ranches, but the ones located in non-flooded areas were associated with antibodies against EIV. A negative correlation was found between the prevalence of antibodies against EIV and the presence of EIAV positive animals on the ranches. The high prevalence of antibodies against EIV detected in this study suggests that the virus is circulating among the animals, and this statistical analysis indicates that the movement and aggregation of animals are factors associated to the transmission of the virus in the region.
PMID:
25351542
[PubMed - in process]
Free full text
http://www.ncbi.nlm.nih.gov/pubmed/25351542
Prevalence of antibodies against influenza virus in non-vaccinated equines from the brazilian pantanal.
Silva LG1, Borges AM1, Villalobos EM2, Lara Mdo C2, Cunha EM2, Oliveira AC3, Braga IA1, Aguiar DM1.
Author information
Abstract
The prevalence of antibodies against Equine Influenza Virus (EIV) was determined in 529 equines living on ranches in the municipality of Pocon?, Pantanal area of Brazil, by means of the hemagglutination inhibition test, using subtype H3N8 as antigen. The distribution and possible association among positive animal and ranches were evaluated by the chi-square test, spatial autoregressive and multiple linear regression models. The prevalence of antibodies against EIV was estimated at 45.2% (95% CI 30.2 - 61.1%) with titers ranging from 20 to 1,280 HAU. Seropositive equines were found on 92.0% of the surveyed ranches. Equine from non-flooded ranches (66.5%) and negativity in equine infectious anemia virus (EIAV) (61.7%) were associated with antibodies against EIV. No spatial correlation was found among the ranches, but the ones located in non-flooded areas were associated with antibodies against EIV. A negative correlation was found between the prevalence of antibodies against EIV and the presence of EIAV positive animals on the ranches. The high prevalence of antibodies against EIV detected in this study suggests that the virus is circulating among the animals, and this statistical analysis indicates that the movement and aggregation of animals are factors associated to the transmission of the virus in the region.
PMID:
25351542
[PubMed - in process]
Free full text
http://www.ncbi.nlm.nih.gov/pubmed/25351542