Frequency of seropositivity against porcine circovirus type 2 (PCV2) in the metropolitan area of Monterrey, Nuevo León, and its peripheral area.

Porcine circovirus type 2 (PCV2) is a DNA-type virus that has an affinity for cells of the immune system and generates lymphocyte depletion so it favors the development of diseases caused by other opportunistic agents, it is also related to the generation of different syndromes. Therefore, this virus causes major illnesses on the pig industry; nevertheless, PCV2-associated syndromes can easily be prevented through the proper application of biosecurity and vaccination measures. On the other hand, small-scale production units (SPUs) often lack this type of preventive management, as well as routine surveillance by a veterinarian. Although PCV2 is considered a widely distributed virus, there are no reports of its presence in SPUs in Nuevo León. The presence of antibodies against PCV2 was determined using a commercial kit and complete blood count was performed on the animals. A total of 48 SPUs were found, with 91.67 % positivity and 89.7 % seropositivity in the animals. In the complete blood count, it was found that HGB and HCT were decreased in individuals who were positive for antibodies compared to negative ones (P=0.03 and P=0.01, respectively); on the contrary, the value of total white blood cells was found to be decreased in individuals who were negative for the presence of antibodies against PCV2 (P=0.01). [ABSTRACT FROM AUTHOR]