Nakamura M, Takagi M, Takahashi T, Suzuki S, Sato S, Takehara K
National Veterinary Assay Laboratory, Tokyo, Japan.
Avian Dis. 1997 Apr-Jun;41(2):354-60.
Horizontal transmission of Salmonella enteritidis and the effect of airflow on spreading were examined in 80 5-wk-old chickens divided into five groups. Sixteen chickens in each group were placed in four cages in a row separated by wire. One among four chickens placed in a cage at the downwind end of the row was inoculated orally with 10(9) colony-forming units of S. enteritidis. Cecal droppings, drinking water, and feed were cultured every day. Horizontal transmission was rapid in the row with low air velocity but slow in the row with high air velocity. However, in another experiment, where the inoculated chicken was situated in a cage upstream in the airflow, horizontal transmission was equally rapid whether the airflow was rapid or slow. Contamination of feed and water never preceded the appearance of positive cecal droppings. These findings suggest that the rapidity of horizontal transmission of S. enteritidis may be affected by airflow patterns.
在80只5周龄的鸡身上研究了肠炎沙门氏菌的水平传播以及气流对其传播的影响，这些鸡被分成五组。每组16只鸡被放置在由铁丝网隔开的一排四个笼子里。在这排鸡舍顺风端的一个笼子里，四只鸡中的一只经口接种了10(9)个肠炎沙门氏菌菌落形成单位。每天对盲肠粪便、饮用水和饲料进行培养。在空气流速低的一排中水平传播迅速，但在空气流速高的一排中传播缓慢。然而，在另一个实验中，接种的鸡位于气流上游的笼子里，无论气流快还是慢，水平传播同样迅速。饲料和水的污染从未先于盲肠粪便呈阳性出现。这些发现表明，肠炎沙门氏菌水平传播的速度可能受气流模式的影响。
