Abstract

Mouse models of infection are important tools in the study of infectious disease or host the development of products to prevent or treat infections. The estradiol-treated mouse model of Neisseria gonorrhoeae genital tract infection has proved to be a valuable system for determining the importance of gonococcal factors that mediate evasion of host innate effectors in vivo or host gonococcal adaptation to hormonally driven host factors in females. Examination of mechanisms that Neisseria gonorrhoeae uses to subvert the host immune response also has been greatly aided by this whole model system, as have studies on the consequence of antibiotic resistance mutations on gonococcal fitness in vivo and the search for new antibiotics to treat antibiotic-resistant infections. The strict human specificity of N. gonorrhoeae limits the ability of experimental murine infection to mimic human infection. However, in recent years, the development of transgenic mice and protocols for supplementing mice with human factors has improved animal modeling of gonorrhea. To date, however, because the mouse estrous cycle is much shorter than the human reproductive cycle, all reported gonorrhea mouse models require treatment with estradiol and antibiotics to maintain an estrus-like state and suppress the overgrowth of inhibitory commensal flora that occurs under the influence of estrogen to allow sustained N. gonorrhoeae infection. In this chapter, we detail the methods used to (1) prepare the mice for experimental infection with N. gonorrhoeae, (2) inoculate mice and quantitatively culture vaginal swabs for noncompetitive and competitive infection experiments, and (3) monitor the host innate immune response to infection.

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