Hannon Sherry J, Allan Brenda, Waldner Cheryl, Russell Margaret L, Potter Andrew, Babiuk Lorne A, Townsend Hugh G G
Department of Large Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5B4.
Can J Vet Res. 2009 Oct;73(4):275-82.
This fecal prevalence study targeted cattle from 7 large (10,000 to > 40,000 head) commercial feedlots in Alberta as a means of establishing Campylobacter levels in cattle just prior to animals entering the food chain. Overall, 87% [95% confidence interval (CI) = 86-88] of 2776 fresh pen-floor fecal samples were culture positive for Campylobacter species, with prevalences ranging from 76% to 95% among the 7 feedlots. Campylobacter spp. prevalence was 88% (95% CI = 86-90) in the summer (n = 1376) and 86% (95% CI = 85-88) in the winter (n = 1400). In addition, 69% (95% CI = 66-71) of 1486 Campylobacter spp. positive samples were identified as Campylobacter jejuni using hippurate hydrolysis testing. Of those, 64% (95% CI = 58-70) of 277 and 70% (95% CI = 67-72) of 1209 Campylobacter isolates were identified as C. jejuni in winter and summer, respectively. After accounting for clustering within pen and feedlot, feedlot size and the number of days on feed were associated with Campylobacter spp. isolation rates. The high isolation rates of Campylobacter spp. and C. jejuni in feedlot cattle feces in this study suggest a potential role for feedlot cattle in the complex epidemiology of campylobacters in Alberta.
这项粪便患病率研究以阿尔伯塔省7个大型（10,000至40,000多头）商业饲养场的牛为对象，以此确定牛在进入食物链之前的弯曲杆菌水平。总体而言，2776份新鲜圈舍地面粪便样本中，87%[95%置信区间（CI）=86 - 88]的弯曲杆菌属培养呈阳性，7个饲养场的患病率在76%至95%之间。弯曲杆菌属患病率在夏季（n = 1376）为88%（95% CI = 86 - 90），冬季（n = 1400）为86%（95% CI = 85 - 88）。此外，在1486份弯曲杆菌属阳性样本中，69%（95% CI = 66 - 71）通过马尿酸盐水解试验鉴定为空肠弯曲杆菌。其中，277份弯曲杆菌分离株在冬季有64%（95% CI = 58 - 70）被鉴定为空肠弯曲杆菌，1209份在夏季有70%（95% CI = 67 - 72）被鉴定为空肠弯曲杆菌。在考虑圈舍和饲养场内的聚集情况后，饲养场规模和饲养天数与弯曲杆菌属分离率相关。本研究中饲养场牛粪便中弯曲杆菌属和空肠弯曲杆菌的高分离率表明，饲养场的牛在阿尔伯塔弯曲杆菌复杂的流行病学中可能发挥作用。
