Gardner I A, Hird D W
Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis 95616.
J Am Vet Med Assoc. 1994 Apr 1;204(7):1062-7.
Factors associated with foot abscess were evaluated in a cohort of 3,322 suckling pigs reared on a woven-wire floor (wire diameter, 0.5 cm; size of openings, 1 x 3.8 cm). In bivariate analysis, foot abscess was significantly (P < 0.05) associated with postpartum sow illness, number of pigs born alive, and parity, but not with birthweight (P = 0.31) or time spent on wire flooring (P = 0.89). One oxytetracycline treatment (100 mg, IM) at birth or 1 treatment at birth and a second 5 to 7 days later reduced (P < 0.05) the risk of lesions by about half. Multivariate analyses indicated that pigs in large litters (> 10 pigs at birth) born to sows with postpartum illnesses had an increased risk (relative risk [RR], 3.77) of developing foot abscess, compared with pigs in small litters (< or = 10 pigs) born to unaffected sows. For sows without evidence of postpartum illness, pigs in large litters had a slightly increased risk (RR, 1.32) of developing foot abscess, compared with pigs in small litters. Pigs born to multiparous sows also had an increased risk (RR, 1.69) of developing foot abscess, compared with pigs born to primiparous sows. Similar risk estimates were obtained when logistic regression models included location farrowed (crate number) as a fixed effect, and when litter was a random effect in a logistic-binomial regression.
在一群饲养在编织钢丝地板（钢丝直径0.5厘米；网孔尺寸1×3.8厘米）上的3322头哺乳仔猪中，对与足部脓肿相关的因素进行了评估。在双变量分析中，足部脓肿与产后母猪疾病、活产仔猪数量和胎次显著相关（P<0.05），但与出生体重（P = 0.31）或在钢丝地板上停留的时间（P = 0.89）无关。出生时进行一次土霉素治疗（100毫克，肌肉注射）或出生时进行一次治疗，5至7天后再进行一次治疗，可使病变风险降低约一半（P<0.05）。多变量分析表明，与出生在未受影响母猪的小窝仔猪（≤10头）相比，出生在产后患病母猪的大窝仔猪（出生时>10头）发生足部脓肿的风险增加（相对风险[RR]，3.77）。对于没有产后疾病证据的母猪，与小窝仔猪相比，大窝仔猪发生足部脓肿的风险略有增加（RR，1.32）。与初产母猪所生仔猪相比，经产母猪所生仔猪发生足部脓肿的风险也增加（RR，1.69）。当逻辑回归模型将产仔地点（产箱编号）作为固定效应，以及在逻辑二项回归中将窝作为随机效应时，获得了类似的风险估计值。
