Trichomonas vaginalis, Protozoan Parasite, SEM


Colored enhanced SEM of two parasitic protozoans Trichomonas vaginalis. Trichomonas vaginalis is an anaerobic, flagellated protozoan parasite and the causative agent of trichomoniasis. It is the most common pathogenic protozoan infection of humans in industrialized countries. Infection rates between men and women are similar with women being symptomatic, while infections in men are usually asymptomatic. Transmission usually occurs via direct, skin-to-skin contact with an infected individual, most often through vaginal intercourse. The WHO has estimated that 160 million cases of infection are acquired annually worldwide. Magnification: 3000x a@ 5x7cm.

Credit: David M. Phillips / Science Source

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