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Infect. Immun., 05 1995, 1784-1789, Vol 63, No. 5
TK Cain and RG Rank
A critical role for cell-mediated immunity (CMI) has been demonstrated for
effecting the resolution of genital infections of mice infected
intravaginally with the mouse pneumonitis biovar of Chlamydia trachomatis
(MoPn). However, little is known about expression of CMI in the murine
genital tract. The mouse MoPn model was used to examine CMI responses in
the genital tract and associated lymph nodes during the course of
infection. MoPn-specific lymphocytes were present in the genital mucosa,
with the maximum level of proliferation in response to MoPn at 3 weeks
postinfection. MoPn-stimulated cells secreting gamma interferon were also
detected in the cells from the genital mucosa, but few
interleukin-4-secreting cells were seen at any time postinfection,
indicating the induction of a Th1-like response in the cells of the genital
mucosa. The iliac node draining the genital tract was the major node
stimulated as a result of a genital infection and exhibited a predominant
Th1-like pattern of cytokine secretion as well. Mesenteric lymph node cells
demonstrated poor proliferative responses to MoPn and few
antigen-stimulated cytokine-secreting cells after the primary infection.
However, 7 days after a second infection administered 50 days following the
primary infection, there was a marked increase in both proliferative
responses and the frequencies of MoPn-stimulated gamma interferon- and
interleukin-4-secreting cells. These studies provided information regarding
the local CMI response to MoPn in mice which may prove valuable in the
development of vaccination strategies for the prevention of chlamydial
genital infections.
Copyright © 1995, American Society for Microbiology
Local Th1-like responses are induced by intravaginal infection of mice with the mouse pneumonitis biovar of Chlamydia trachomatis
Department of Microbiology and Immunology, University of Arkansas for Medical Sciences, Little Rock 72205, USA.
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