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- W1981105544 abstract "Two groups of 50 BALB/c male mice were immunized with live Chlamydia trachomatis mouse pneumonitis (MoPn) using the intranasal (i.n.) or the meatus urethra (intraurethral: i.u.) routes. As a control group, 100 male mice were sham-immunized in parallel. Both groups of animals vaccinated with live organisms developed strong Chlamydia-specific humoral and cell mediated immune responses. Based on the IgG2a/IgG1 ratio and the levels of IFN-γ both groups mounted a Th1 immune response. At six weeks following the immunization, all mice were challenged in the meatus urethra. The urethra, urinary bladder, testes and epididymides were harvested at weekly intervals and tested for the presence of C. trachomatis. Based on the culture results from these four organs both groups of Chlamydia-immunized mice showed significant protection. In the group immunized i.u., 10% (5/50) had positive cultures, while in the group immunized i.n. 28% (14/50) had positive cultures during the 5 weeks of observation. In contrast, in the sham-immunized animals 47% (47/100) had positive cultures (P<0.005) during the study period. In addition, the number of positive organs, the length of time that the animal had positive cultures, and the total number of inclusion forming units (IFU) recovered were overall significantly lower in the i.u. or i.n. groups in comparison with the sham-immunized animals. However, in relation to the i.u. immunized group, the protection elicited in the i.n. group was delayed and not as robust. In conclusion, immunization of mice in the meatus urethra may provide the gold standard for testing Chlamydia vaccines in a male model." @default.
- W1981105544 created "2016-06-24" @default.
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- W1981105544 date "2010-11-01" @default.
- W1981105544 modified "2023-09-26" @default.
- W1981105544 title "A new murine model for testing vaccines against genital Chlamydia trachomatis infections in males" @default.
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- W1981105544 doi "https://doi.org/10.1016/j.vaccine.2010.09.060" @default.
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