In an attempt to obtain a model more closely resembling natural listeriosis, we studied the course of infection in mice inoculated by the intragastric route with Listeria monocytogenes. Corticosteroid-treated, and untreated mice both developed subclinical infection without mortality, but faecal shedding and persistence of bacteria in the liver and spleen of corticosteroid-treated mice were significantly more protracted than in untreated mice. Untreated mice cleared the bacteria from their livers and spleens by day 5 postinfection (PI), whereas treated mice did not clear the organisms until 8-9 days PI. In untreated mice faecal shedding lasted 5 days PI, whereas in treated mice the organisms were recovered at significantly higher levels until day 9 PI. The only intestinal lesions observed were mild pyogranulomatous changes in the dome area of some Peyer's patches in treated mice.
- Listeria monocytogenes
Prats, N., López, S., Domingo, M., Briones, V., García, J. A., Domínguez, L., & Marco, A. J. (1997). Prolonged persistence of Listeria monocytogenes after intragastric infection in corticosteroid-treated mice. Veterinary Microbiology, 58(1), 79-85. https://doi.org/10.1016/S0378-1135(97)00132-6