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Logo of actavetsBioMed CentralBiomed Central Web Sitesearchsubmit a manuscriptregisterthis articleActa Veterinaria Scandinavica
 
Acta Vet Scand. 2012; 54(1): 29.
Published online May 3, 2012. doi:  10.1186/1751-0147-54-29
PMCID: PMC3434114
Detection of porcine circovirus genotypes 2a and 2b in aborted foetuses from infected swine herds in the State of São Paulo, Brazil
Alessandra MMG de Castro,corresponding author1 Taís F Cruz,2 Vanessa R Salgado,1 Tatiana M Kanashiro,2 Karen L Ferrari,1 João P Araujo, Jr,2 Paulo E Brandão,1 and Leonardo J Richtzenhain1
1Department of Preventive Veterinary Medicine and Animal Health, College of Veterinary Medicine, University of São Paulo (USP), São Paulo, SP, 05508-270, Brazil
2Department of Immunology and Microbiology, Institute of Biosciences, College of Veterinary Medicine, São Paulo State University (UNESP), Botucatu, SP, 18618-000, Brazil
corresponding authorCorresponding author.
Alessandra MMG de Castro: almarnie/at/yahoo.com; Taís F Cruz: tfcruz/at/yahoo.com.br; Vanessa R Salgado: vanessasalgado/at/hotmail.com; Tatiana M Kanashiro: tati-mitiko/at/hotmail.com; Karen L Ferrari: karenferrari/at/gmail.com; João P Araujo, Jr: jpessoa/at/ibb.unesp.br; Paulo E Brandão: paulo7926/at/yahoo.com; Leonardo J Richtzenhain: leonardo/at/usp.br
Received October 7, 2011; Accepted May 3, 2012.
Abstract
Background
Porcine circovirus type 2 (PCV2) has been associated with several disease complexes, including reproductive failure. The aim of this study was to identify the subtypes of PCV2 that are associated with reproductive failure in pigs from the State of São Paulo, Brazil and to investigate co-infections with other infectious organisms.
Findings
Samples of 168 aborted foetuses or mummified foetuses from five farrow-to-finish swine farms known to be infected with PCV2 and located in the State of São Paulo were tested for PCV2 by polymerase chain reaction (PCR). Positive samples were additionally tested for porcine parvovirus (PPV), Leptospira spp. and Brucella spp. by PCR. PCV2 was detected in 18 of the samples (10.7%). PPV, Brucella spp. and Leptospira spp were found in 2, 10 and 0 cases, respectively. Eleven PCV2 strains were sequenced and determined to be either genotype 2a (n = 1) or 2b (n = 10).
Conclusions
The findings indicate that the frequency of PCV2 infections in aborted porcine foetuses from the State of São Paulo is rather low (10.7%) and that co-infection with other pathogens is common and may be involved in PCV2 associated reproductive failure. No repeatable, characteristic amino acid motifs for regions of the PCV2 capsid protein seemed to be associated with abortion in sows.
Keywords: Pig, Abortion, Porcine circovirus, Porcine parvovirus, Brucella
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