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Investigation on the co-infections of Toxoplasma gondii with PRRSV, CSFV or PCV-2 in swine in part of China
Author(s): 
Pages: 1838-1844
Year: Issue:  9
Journal: Agricultural Sciences in China

Keyword:  Toxoplasma gondicoinfectionPRRSVCSFVPCV-2pig;
Abstract: The objective of the present investigation was to estimate the prevalence of Toxoplasma gondi infection and co-infection with porcine reproductive and respiratory syndrome virus (PRRSV), classical swine fever virus (CSFV) and porcine circovi-rus type 2 (PCV-2) in pigs in China. A total of 372 tissues or serum samples col ected from pigs distributed in 9 provinces/municipalities of China during the period from February 2011 to November 2012 were assayed for T. gondi antigens and antibodies using enzyme linked immunosorbent assay (ELISA) technique, while the PCR was designed for the detection of the PRRSV, CSFV and PCV-2, respectively. The total positive rate of T. gondi , PRSSV, CSFV and PCV-2 was 9.14%(34/372), 50.00%(186/372), 37.10%(138/372) and 3.23%(12/372), respectively. Among the 34 T. gondi positive samples, 26 samples were simultaneously infected with T. gondi and viruses, while the remaining eight samples were infected with T. gondi alone. In addition, the co-infection rate of T. gondi with PRSSV, T. gondi with PRSSV and CSFV, T. gondi with PRSSV and PCV-2, T. gondi with CSFV and PCV-2, T. gondi with PRSSV, CSFV and PCV-2 was 1.61%(6/372), 4.03%(15/372), 0.27%(1/372), 0.27%(1/372) and 0.81%(3/372), respectively. The results of the present survey revealed that PRRSV and CSFV were the common pathogens co-existing with porcine toxoplasmosis in China, and both of them could increase the chances of T. gondi infection in pig. This is the ifrst report of T. gondi co-infections with viruses in pigs. It is very important to understand the interactions of parasite and virus, and can be used as reference data for the control and prevention of co-infections of T. gondi and viruses in pigs.
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