Sero-Occurrence of Porcine Reproductive and Respiratory Syndrome Antibodies among Swine Presented for Slaughter at Valencia and Malaybalay City Abattoirs

The study aimed to determine the sero-occurrence of PRRS among swine presented for slaughter at Malaybalay and Valencia City abattoirs. Specifically, the study aimed to determine the presence of PRRS antibodies using the Civtest Suis PRRS between commercial- and backyard-raised swine regardless of age; and to evaluate the gross pathology of lungs at slaughter using the scoring system adapted from the study of Leneveu et al. The study dealt only with the results of serological examination for the presence of PRRS antibodies in unvaccinated pigs. A total of 200 samples were obtained and tested for the presence of PRRS E/S antibody test kit. Evaluation of lungs of pigs at slaughter was done limited to the gross appearance of lung surfaces. Results revealed that 9.5% (19 0f 200) of samples were positive for the presence of PRRS antibodies: 10% (10 of 100) in commercial and 9% (9 of 100) in the backyard. There was no significant difference in the occurrence of PRRS between commercial and backyard (P>0.05). Evaluation of the lungs revealed that pneumonia had the highest frequency (100%) with a mean score of 2.863 among other lesions.

Based on the results, the author concludes that PRRS is present in the locality of Bukidnon but of low prevalence and that both commercial- and backyard- raised swine are susceptible. Moreover, at slaughter, the most common lesion is pneumonia with high severity based on the mean score. Other lesions were also present but of low incidence and severity.

 

Keywords: Antibodies, prevalence,  sero-occurrence,  lesion,  biosecurity, incidence