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犊牛沙门氏菌感染实验。1. 应激因素对带菌状态的影响。

Experimental Salmonella infection in calves. 1. The effect of stress factors on the carrier state.

作者信息

Gronstol H, Osborne A D, Pethiyagoda S

出版信息

J Hyg (Lond). 1974 Apr;72(2):155-62. doi: 10.1017/s0022172400023342.

Abstract

Four calves were infected with 2.4 x 10(8)S. dublin and penned separately. Fluctuations in environmental temperature did not affect the symptoms of the disease or the duration of excretion. Faecal samples were superior to rectal swabs for detecting excretors.After transport stress, Salmonella was isolated from several organs at slaughter in an excreting calf, and uninoculated control calves became cross-infected. During slaughter, carcasses became contaminated on their surfaces. From one contaminated carcass Salmonella was recovered after chilled storage at 0 degrees C. for 1 week and also after freezing at -20 degrees C. for 1 month.

摘要

四头小牛感染了2.4×10⁸ 都柏林沙门氏菌,并分别圈养。环境温度的波动不影响疾病症状或排泄持续时间。粪便样本在检测排泄者方面优于直肠拭子。运输应激后,在一头正在排泄的小牛屠宰时,从其多个器官中分离出沙门氏菌,未接种的对照小牛发生了交叉感染。屠宰期间,胴体表面受到污染。从一具受污染的胴体中,在0℃冷藏1周后以及在-20℃冷冻1个月后均检出了沙门氏菌。

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