Gjein H, Larssen R B
Norwegian Pig Health Service, Central Veterinary Laboratory, Norwegian College of Veterinary Medicine, Oslo, Norway.
Acta Vet Scand. 1995;36(4):433-42. doi: 10.1186/BF03547658.
A field study of 36 Norwegian sow herds was conducted over a 12 month period, 18 herds had loose housing of pregnant sows and 18 herds had confined (stalled or tethered) dry sows. Fifteen of the loose housing herds had partly slatted concrete floors while 3 herds had other kinds of flooring. The types of claw lesions that were observed in these herds are described. The most prevalent lesions on both loose sows and confined sows were side wall cracks, heel lesions, cracks in the white line and overgrown heels. The lateral hind claws were the most frequent location for lesions and they were more severe than at other sites. These lesions tended to show a bilateral occurrence. More than 96% of slaughtered loose sows and 80% of slaughtered confined sows had at least 1 lesion on the lateral hind claws. The prevalence of claw lesions showed no obvious age pattern. However the prevalence seemed to be lower for the first litter sows and increased slightly thereafter, especially in the confined herds.
在12个月的时间里，对36个挪威母猪群进行了一项实地研究，其中18个猪群的怀孕母猪采用散养，18个猪群的空怀母猪采用限位饲养（栏养或拴养）。15个散养猪群的地面为部分漏缝的水泥地面，3个猪群采用其他类型的地面。描述了在这些猪群中观察到的爪部病变类型。散养母猪和限位饲养母猪中最常见的病变是侧壁裂缝、足跟病变、白线裂缝和足跟过长。后外侧爪是病变最常发生的部位，且比其他部位的病变更严重。这些病变往往呈双侧发生。超过96%的屠宰散养母猪和80%的屠宰限位饲养母猪后外侧爪至少有1处病变。爪部病变的发生率没有明显的年龄模式。然而，初产母猪的发生率似乎较低，此后略有上升，尤其是在限位饲养的猪群中。
