In cases of trichomonas vaginitis, the incubation period for women can vary in length and differs from person to person; it cannot be generalized. The specific onset time of the vaginitis should be considered. Generally, the incubation period for trichomonas vaginitis can be as short as 4 to 5 days, or as long as over 20 days. Trichomonas vaginitis is caused by the parasite Trichomonas vaginalis and is a common form of vaginitis. Trichomonas vaginalis thrives in temperatures between 26°C to 40°C, in moist environments with a pH value of 5.2 to 6.6. It can survive for 21 days at 3 to 5°C, for 20 to 60 minutes at 40°C, approximately 10 hours in a semi-dry environment, and for 45 to 120 minutes in ordinary soap water. Therefore, the incubation period for trichomonas vaginitis varies. If you have further questions, it is advisable to consult a doctor at a hospital.