동물유래 생식품, 사료 및 분변중 listeria monocytogenes의 분포와 분리균의 특성에 관한 연구 4. 초생추에 있어서 listeria monocytogenes의 장관 정착성

Characteristics of Isolates and Incidence of Listeria monocytogenes in Faeces from Animals, in Feed and in Raw Foods of Animal Origin 4. Intestinal Colonization of Listeria monocytogenes in Newly Hatched Chicks

This study was conducted to investigate the colonization characteristics of Listeria monocytogenes in chickens. A total of 70 chickens were challenged orally with either 10², 10⁴, and 10⁶ cells of L. monocytogenes strain Scott A (serotype 4b) and wild strain(serotypel) at newly hatched chicks. Seven days after the challenge, the cecum, duodenum, spleen, liver and cloacal swabs were sampled from each chick and were analysed for the presence of L. monocytogenes. Serotype 4b strain was a dose-related colonization response(10⁶＞10²) ; and more recoveries were obtained from the cecum, duodenum and cloacal swabs than from the spleen and liver. L. monocytogenes was discharged(1.0-5.7 CFU log₁₀) for 7 days after the challenge, and after that, organisms were not recovered from any cloacal swabs.