Valutazione di una strategia di acclimatamento nei confronti della PRRS su alcuni parametri riproduttivi in scrofe al primo parto

The aim of this study is to evaluate the efficiency and the critical points of a control strategy for PRRS in a breeding herd based on the acclimatization of gilts. We collected samples for virological and serological testing from 10 groups of gilts at the end of the acclimatization in the period between April 2006 and July 2007. Some reproductive parameters of the first farrow sows (number of total born piglet, number of born alive piglets, number of born dead piglets and number of mummified piglets) were recorded and relate to immunity expressed as group antibodies prevalence, as individual immunological status (seropositive vs seronegative) and as group mean s/p ratio. The results show a season effect on the number of born alive piglets (their num- ber is significantly lower in the period April 2007 – July 2007). Serological status does not result significantly associated with reproductive performances.