Nakamura M, Nagamine N, Takahashi T, Suzuki S, Kijima M, Tamura Y, Sato S
National Veterinary Assay Laboratory, Tokyo, Japan.
Avian Dis. 1994 Apr-Jun;38(2):282-8.
Horizontal transmission of Salmonella enteritidis in laying hens and the short-term effect of stress on shedding were examined in 32 seven-month-old laying hens. Half were inoculated with 10(5) colony-forming units of S. enteritidis phage type 4, and the remaining half were left uninoculated to study horizontal transmission. Isolation of S. enteritidis from cecal droppings of all hens was attempted every morning. Uninoculated hens rapidly became infected through contaminated drinking water. Introduction of young chickens to the same rearing room and withdrawal of water and feed for 2 days coincided with a rapid increase in the shedding rate of S. enteritidis for a short period of time. The results showed that a short-term increase in the shedding rate of S. enteritidis is associated with short-term exposure to environmental stress.
在32只7月龄蛋鸡中研究了肠炎沙门氏菌在蛋鸡中的水平传播以及应激对排菌的短期影响。一半蛋鸡接种10⁵个4型肠炎沙门氏菌噬菌体型的菌落形成单位，另一半不接种以研究水平传播。每天早晨尝试从所有母鸡的盲肠粪便中分离肠炎沙门氏菌。未接种的母鸡通过受污染的饮用水迅速感染。将小鸡引入同一饲养室并停水和停喂2天，这与肠炎沙门氏菌排菌率在短时间内迅速增加同时发生。结果表明，肠炎沙门氏菌排菌率的短期增加与短期暴露于环境应激有关。
