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EXPERIMENTAL STREPTOBACILLUS MONILIFORMIS ARTHRITIS IN THE CHICK EMBRYO
1Department of Pathology, Vanderbilt University School of Medicine, Nashville.
Abstract:
1. A strain of Streptobacillus moniliformis isolated from a case of rat bite fever in man has been found to produce infection of the developing chick embryo following inoculation of the chorio-allantois. 2. The disease in embryos is characterized by invasion of the blood stream and an almost exclusive localization of the infectious process to the synovial lining of the joints. 3. In the early stages of the development of the joint lesions the Streptobacillus moniliformis behaves as a facultative intracellular parasite within the cytoplasm of the synovial lining cells. Conditions favorable for the growth of the microorganisms are maintained only temporarily. The infection appears to be self-limiting in nature.
Insights
Streptobacillus moniliformis, a cause of rat bite fever, can infect developing chick embryos. The infection localizes to joint tissues and appears to be self-limiting.
Area of Science:
- Microbiology
- Infectious Diseases
- Developmental Biology
Background:
- Rat bite fever is caused by Streptobacillus moniliformis.
- The pathogenesis of Streptobacillus moniliformis in vivo is not fully understood.
Purpose of the Study:
- To investigate the infectivity of Streptobacillus moniliformis in a developing chick embryo model.
- To characterize the pathological features of Streptobacillus moniliformis infection in chick embryos.
Main Methods:
- Inoculation of developing chick embryos via the chorio-allantoic membrane with Streptobacillus moniliformis.
- Histopathological examination of infected embryos to identify bacterial localization and host response.
Main Results:
- Streptobacillus moniliformis successfully infected developing chick embryos.
- Infection led to bloodstream invasion and localized primarily to the synovial lining of joints.
- The bacteria acted as facultative intracellular parasites within synovial lining cells.
- The infection was observed to be self-limiting.
Conclusions:
- The developing chick embryo serves as a viable model for studying Streptobacillus moniliformis infections.
- The synovial lining is a key target tissue for Streptobacillus moniliformis.
- The intracellular behavior and self-limiting nature of the infection warrant further investigation.
