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Pig Journal Volume: 51
Publication date: June 2003

Proceedings Section

POST-WEANING MULTISYSTEMIC WASTING SYNDROME (PMWS) AND PORCINE CIRCOVIRUS TYPE 2 INFECTION IN SPAIN
J. Segales, M. Calsamiglia and M. Domingo

Abstract
In Spain, post-weaning multisystemic wasting syndrome (PMWS) was firstly recognised in 1997. Since then, the disease has been diagnosed in pigs from most of the Spanish provinces and it is nowadays considered one of the major concerns for veterinarians, farmers and scientists. More than 2600 pigs, from about 500 different farms, were diagnosed as PMWS by the Pathological Diagnostic Service at the Veterinary School of Barcelona between 1997 and 2002. Retrospective investigations have shown the existence of the disease in Spain as early as 1986, although its incidence was low compared with the last 6 years. Epidemiological data indicate that PCV2 infection is highly widespread in Spain, and no obvious differences in serological and polymerase chain reaction (PCR) profiles have been detected between PMWS and non-PMWS affected farms. Since no specific treatment exists for PMWS, zootechnical measures to reduce the so-called "infection pressure" of PCV2 and any other pathogen have been applied in Spain with variable success. A moderate to high proportion of porcine dermatitis and nephropathy syndrome (PDNS) and porcine respiratory disease complex (PRDC) affected pigs are also infected with PCV2. Although PCV2 has been related with reproductive failure and congenital tremors type AII, no evidence for this association has been observed in Spain.

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