Detection of Ovine Gammaherpesvirus 2 Antibodies in Dairy Farms in Southern Brazil
Author Information
Author(s): Headley Selwyn Arlington, Grant Dawn Marie, Fritzen Juliana Torres Tomazi, Martins Felippe Danyel Cardoso, Camilo Stefany Lia Oliveira, Caldart Eloiza Teles, Lisbôa Júlio Augusto Naylor, Alfieri Amauri Alcindo, Russell George Cameron, Rodríguez-Lázaro David
Primary Institution: Universidade Estadual de Londrina
Hypothesis
Can an indirect MCF-specific ELISA assay based on the AlGHV1 C500 strain effectively detect antibodies against OvGHV2 in dairy cattle?
Conclusion
The study found that 37.2% of dairy farms and 7.9% of dairy cows tested positive for antibodies against OvGHV2, indicating a wider distribution of the virus than previously documented.
Supporting Evidence
- 29 out of 367 dairy cows tested positive for OvGHV2 antibodies.
- 37.2% of the dairy farms had at least one seropositive cow.
- Cows in intensive management systems had a higher chance of being seropositive.
- Spatial analysis indicated a potential link between wild boars and seropositivity in dairy cows.
Takeaway
This study shows that some cows in Southern Brazil have a virus that can make them sick, and it might be spread by wild boars nearby.
Methodology
The study used an indirect ELISA to test blood samples from dairy cows for antibodies against OvGHV2.
Potential Biases
Potential bias due to the closed nature of most farms, which may not represent broader cattle populations.
Limitations
Only one dairy farm was sampled in the municipality of Jaguariaíva, limiting the representativeness of that region.
Participant Demographics
Dairy cows from 43 closed farms in Southern Brazil, primarily Holstein and Jersey breeds.
Statistical Information
P-Value
0.030
Confidence Interval
95%
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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