Serological examinationof porcine circovirus 2 infection in commercial pig farms

Date

4-2014

Degree

Doctor of Veterinary Medicine

College

College of Veterinary Medicine (CVM)

Adviser/Committee Chair

Romeo E. Sanchez Jr.

Abstract

The pattern of porcine circovirus 2 (PCV2) infection in pigs and breeders was serologically examined in this study. In two commercial pig farms (1 and 2), the persistence of maternal antibodies and the age of seroconversion in pigs were tested by performing a cross-sectional profile involving 10 pigs each of four, eight, 12, 16, and 20 weeks of age. In the same two farms, infection in breeders and possible intrauterine infection were also examined by testing for PCV2 antibodies in sows and stillborn piglets. A commercially available PCV2 antibody ELISA was used to check for PCV2 antibodies. Based on the percentage of seropositive pigs and the mean S/P ratios, maternal antibodies were suggested to be present for up to 12 and 16 weeks of age, respectively, in farms 1 and 2. In both farms, seroconversion occurred in the growing-finishing stage between 16 and 20 weeks of age. All four sows tested from each farm were positive for PCV2 antibodies, while all 11 and 20 stillborn piglets from farms 1 and 2, respectively, were negative for PCV2 antibodies. This study shows prolonged persistence of maternal antibodies and late occurrence of PCV2 infection in pigs, high percentage of seropositive breeders, and possibly low to no occurrence of intrauterine infection.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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