Parvovirus and reproductive disorders in the pig. Clinical and serological study — Practical consequences

Abstract

A serological survey made in France reveals a rather large diffusion of the Parvovirus among pig herds. 45

Clinical papers

“…The aetiological role of PPV in the mentioned problems PPV is well known as an important, if not the most important, cause of reproductive failure in swine herds (10,30,32,57) and the most important manifestation of a PPV infection has been mentioned above: conception failure, with return to oestrus within three weeks or more (6,20,37,56), mummification (4,6,9,11,16,18,30,37,41,44,53,54,55,56,57), stillborn and weak piglets (6,18,53), small litter sizes (35, 37) and neonatal deaths (4,18,53). The first sign of reproductive failure in the reported herd problem was an increase in the number of repeat breeders, which was followed by a decrease in litter sizes and an increase in the number of stillborn and mummified piglets several months later.…”

“…PPV mainly causes reproductive failure in susceptible gilts, although sows can still be susceptible and consequently be infected (4,9,15,52,54). Susceptible animals can be infected by two different routes: oronasal or venereal (18,57). The infection is followed by viraemia (3,37) and sometimes leucopenia (16,18) and can result in transplacental infection (16,18,35,37) with embryonic and foetal death (29, 54) and intrauterine spread of the virus (18,32,35,42,54).…”