Surveillance for Schmallenberg Virus in Cattle
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The objective of this study was to conduct a serological investigation for Schmallenberg virus (SBV) infection in cattle raised in the State of Alagoas. A total of 460 samples obtained from the serum bank of the Agricultural Defense Agency of Alagoas (ADEAL) were analyzed. These samples originated from unvaccinated cattle of 100 properties spread across 99 municipalities in Alagoas, encompassing the three mesoregions: Agreste, Leste, and Sertão. Serological diagnosis was carried out utilizing commercial indirect and competitive Enzyme-Linked Immunosorbent Assay (ELISA) kits. Results indicated that 0.87% (4 out of 460) of samples yielded questionable results in the indirect ELISA (> 50.00% and ≤ 60.00% of the calculated percentage). Following further examination with competitive ELISA, only one sample was yielded positive. This highlights the necessity for reinforcing regional surveillance and control strategies concerning emerging pathogens. Furthermore, additional investigations incorporating viral isolation in both ruminants and vectors are imperative to conclusively confirm the circulation of the pathogenic agent. Such comprehensive studies are vital for enhancing our understanding of SBV dynamics and facilitating the development of targeted control measures.
