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Bacterial Infections

Experimental Gonococcal Genital Tract Infection and Opacity Protein Expression in Estradiol-Treated Mice

Ann E. Jerse
Ann E. Jerse
Department of Microbiology and Immunology, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814-4799
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DOI: 10.1128/IAI.67.11.5699-5708.1999
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ABSTRACT

The development of effective prophylactic agents against gonorrhea and the study of adaptation by Neisseria gonorrhoeae to the urogenital mucosa are hindered by the lack of a well-established animal model of gonococcal genital tract infection. Here, a murine model of long-term gonococcal genital tract infection is described. Female BALB/c mice were treated with 17-β-estradiol and inoculated intravaginally with wild-type gonococcal strain FA1090 or MS11.N. gonorrhoeae was recovered from vaginal swabs for an average of 12 to 13 days following inoculation with 106 CFU of either strain. Inflammation occurred in over 80% of infected mice, and diplococci were associated with epithelial cells and neutrophils in stained vaginal smears. Ascended infection occurred in 17 to 20% of mice inoculated with strain FA1090. An outbred mouse strain (SLC:ddY) previously reported to be naturally susceptible to N. gonorrhoeae was also tested; however, as with BALB/c mice, estradiol was required for prolonged infection. Although piliation was not maintained during experimental murine infection, 46 to 100% of vaginal isolates from four of eight BALB/c mice and three of four SLC:ddY mice expressed one or more opacity (Opa) proteins within 4 days after inoculation with an Opa-negative variant of strain FA1090. The observed selection for and/or induction of gonococcal Opa protein expression during murine infection appears to parallel events that occur during experimental urethritis in volunteers.

  • Copyright © 1999 American Society for Microbiology
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Experimental Gonococcal Genital Tract Infection and Opacity Protein Expression in Estradiol-Treated Mice
Ann E. Jerse
Infection and Immunity Nov 1999, 67 (11) 5699-5708; DOI: 10.1128/IAI.67.11.5699-5708.1999

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Experimental Gonococcal Genital Tract Infection and Opacity Protein Expression in Estradiol-Treated Mice
Ann E. Jerse
Infection and Immunity Nov 1999, 67 (11) 5699-5708; DOI: 10.1128/IAI.67.11.5699-5708.1999
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KEYWORDS

Antigens, Bacterial
Estradiol
Genital Diseases, Female
gonorrhea

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