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. 1978 Aug;21(2):417–424. doi: 10.1128/iai.21.2.417-424.1978

Mechanisms of immunity in typhus infection: some characteristics of Rickettsia mooseri infection of guinea pigs.

J R Murphy, C L Wisseman Jr, P Fiset
PMCID: PMC422012  PMID: 99367

Abstract

Rickettsia mooseri infection has been studied in syngeneic guinea pigs inoculated intradermally with the objective of developing a model for the study of immune mechanisms. Characterization of infection included the following: a study of replication, dissemination, and clearance of rickettsiae; measurement of the antibody response with different rickettsial antigens and tests; and attempts to measure the cell-mediated immune response using the correlate of delayed-type hypersensitivity skin reactions. Following intradermal inoculation, rickettsiae replicate locally and then spread to the draining lymph nodes and subsequently cause systemic infection. Spread to draining lymph nodes occurred before the appearance of circulating antibody, whereas systemic infection occurred afterwards. Two distinct patterns of acquired resistance developed. The first was marked by a cessation of rickettsial growth within a given organ and the second by a clearance of rickettsiae. The duration of each of these phases differed markedly from one organ to another. Delayed-type hypersensitivity was not demonstrated by skin testing.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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