Clinical study of mastitis-metritis-agalactia in sows in Illinois.

摘要: Mastitis-metritis-agalactia (MMA) occurred in 6.9% of 16,405 farrowings recorded over 1 year (1981) 31 Illinois swine herds. Prevalence MMA among herds ranged from 1.1% to 37.2% and was not correlated herd size. There a significant positive correlation between the prevalence housing system wherein sows were moved pasture gestation crates immediately before farrowing. A seasonal peak found for third quarter (10.3%). Mean 13% pluriparous 4.2% primiparous sows. The difference significant. Sows with gave birth more live pigs per litter compared healthy (+0.7 litter). number stillbirths dead after also higher (+4.6%). Total pig mortality until week age 56% litters 17% and, respectively, 41% 15% mean surviving at 5.6 9.3 6.2 8.3 For all investigated, size (including stillbirths) 11.0. 31%. Pig losses attributable MMA, disease, 4% born 12.9% age.