Samuel J L, Eccles J A, Francis J
J Hyg (Lond). 1981 Oct;87(2):225-32. doi: 10.1017/s0022172400069448.
The distribution of salmonellas along the gastrointestinal tract and in associated lymph nodes were studied in 100 sheep and 100 cattle at slaughter. Animals were chosen from those slaughtered on the first day of the week, since this meant that they were likely to have been held at the abattoir for several days and thus to be at high risk of salmonella infection. The contents of the rumen, abomasum, ileum, caecum and rectum were sampled, together with the lymph nodes draining each of these sites. Of the cattle, 77 were carrying salmonellas, including 61 with infected lymph nodes, whereas only 43 sheep were infected, 14 of them with infections in the nodes. The lower prevalence in sheep than in cattle might be explained by a shorter time between leaving the property and slaughter. In both species, within the gastrointestinal tract salmonellas were most frequently found in the caecum and rectum and least frequently in the abomasum. In cattle salmonellas were frequently present, usually in large numbers, in the lymph nodes draining the ileum, caecum and colon, but rarely in the ruminal and abomasal nodes; however this difference was not apparent in sheep. Over 70% of infected animals yielded more than one serotype, the maximum number isolated from any one animal being ten.
对100只绵羊和100头牛在屠宰时沙门氏菌在胃肠道及相关淋巴结中的分布情况进行了研究。动物选自一周第一天屠宰的那些，因为这意味着它们很可能已在屠宰场关押了几天，因此感染沙门氏菌的风险很高。采集了瘤胃、皱胃、回肠、盲肠和直肠的内容物，以及引流这些部位的淋巴结样本。在牛中，77头携带沙门氏菌，其中61头的淋巴结受到感染，而只有43只绵羊被感染，其中14只的淋巴结有感染。绵羊的感染率低于牛，可能是因为从离开养殖场到屠宰的时间较短。在这两个物种中，在胃肠道内，沙门氏菌最常出现在盲肠和直肠，最少出现在皱胃。在牛中，引流回肠、盲肠和结肠的淋巴结中经常存在沙门氏菌，通常数量很多，但瘤胃和皱胃的淋巴结中很少见；然而，这种差异在绵羊中并不明显。超过70%的感染动物产生不止一种血清型，从任何一只动物中分离出的血清型最多为十种。
