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. 1983 Sep;41(3):1132–1137. doi: 10.1128/iai.41.3.1132-1137.1983

Cellular immunity to Legionella pneumophila in guinea pigs assessed by direct and indirect migration inhibition reactions in vitro.

H Friedman, R Widen, I Lee, T Klein
PMCID: PMC264617  PMID: 6350180

Abstract

Spleen cell cultures from guinea pigs given legionella pneumophila vaccine in complete Freund adjuvant or as a sublethal infection were inhibited in their migration activity in vitro when incubated with specific antigen. Both direct and indirect migration inhibition assays revealed sensitization of the guinea pigs to the bacterium, with demonstrable reactivity 25 to 40 days or more after sensitization. No consistent reactions occurred when the guinea pigs were given the killed Legionella vaccine in incomplete Freund adjuvant in saline. However, spleen cells from guinea pigs injected with sublethal doses of the Legionella vaccine 3 to 4 weeks earlier showed positive migration inhibition factor reactivity. Cutaneous hypersensitivity and lymphocyte blastogenic responsiveness in vitro also developed in guinea pigs sensitized with killed Legionella vaccine in complete adjuvant or given a sublethal infection with the bacterium. These results indicate that in vitro assays for migration inhibitory activity may be utilized to monitor the development of the sensitization of guinea pigs to L. pneumophila, and such reactions correlate with skin reactivity and in vitro lymphocyte blastogenic responses.

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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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