PMID: 9529051Apr 7, 1998Paper

An essential role for gamma interferon in innate resistance to Shigella flexneri infection

Infection and Immunity
S S WayM B Goldberg

Abstract

Shigella spp. are the major cause of bacillary dysentery worldwide. To identify immune effectors associated with protection of the naive host during infection, the susceptibility to pulmonary Shigella infection of each of various mouse strains that have a targeted deletion in a specific aspect of the immune system was evaluated. Our results demonstrate that mice deficient in gamma interferon are 5 orders of magnitude more susceptible to Shigella than are wild-type mice, whereas mice deficient in B and T lymphocytes or in T lymphocytes alone exhibit no difference in susceptibility. Significantly lower numbers of shigellae were recovered from immunocompetent compared with gamma-interferon-deficient mice after infection. While immunocompetent mice were able to clear a sublethal Shigella inoculum by day 5 postinfection, progressively increasing numbers of shigellae were cultured from the lungs of gamma interferon-deficient mice over the same period. Histopathology of the lungs from immunocompetent mice infected with a sublethal Shigella inoculum showed mild inflammatory changes, whereas the lungs from gamma interferon-deficient mice demonstrated progressively worsening acute bronchiolitis with ulceration. Further, the time to death...Continue Reading

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Citations

Feb 5, 2000·The Journal of Immunology : Official Journal of the American Association of Immunologists·T SamandariM B Sztein
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Jul 23, 2021·Acta Microbiologica Et Immunologica Hungarica·Fatema Moni ChowdhuryNils-Kåre Birkeland

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