Premium
Randomised, placebo‐controlled trial of a live vaccine against porcine reproductive and respiratory syndrome virus in sows on infected farms
Author(s) -
Pejsak Z.,
MarkowskaDaniel I.
Publication year - 2006
Publication title -
veterinary record
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.261
H-Index - 99
eISSN - 2042-7670
pISSN - 0042-4900
DOI - 10.1136/vr.158.14.475
Subject(s) - abortion , placebo , porcine reproductive and respiratory syndrome virus , veterinary medicine , biology , vaccination , estrous cycle , medicine , virus , zoology , pregnancy , virology , physiology , genetics , alternative medicine , pathology
A randomised, double‐blinded, placebo‐controlled study into the effectiveness and safety of a vaccine against porcine reproductive and respiratory syndrome virus ( PRRSV ) was carried out on three farms with a history compatible with chronic PRRSV infection; representative groups of sows and gilts were injected with a live vaccine against PRRSV , and during the next six weeks no side effects were observed. The remaining sows and gilts on the three farms were then vaccinated with the same vaccine. Again, no side effects were observed. There were significant reductions in abortion, reproductive disease, returns to oestrus and the numbers of stillborn pigs per sow, and significant increases in the numbers of liveborn pigs per sow and weaned pigs per sow among the vaccinated animals.