Intestinal and urogenital flagellates.

Although the human alimentary and urogenital tracts are parasitized by seven species of flagellate protozoa [115], only two, Giardia lamblia and Trichomonas vaginalis, are generally considered to be pathogens. This review, therefore, concentrates on these organisms and in particular on the experimental and clinical chemotherapy of trichomoniasis and giardiasis. Due to the limited space and the availability of excellent recently published reviews, topics such as life cycles, epidemiology, prevalence and pathology are only briefly discussed in the sections entitled 'Biological Aspects'. The reader seeking comprehensive reference lists and more information on Trichomonas and Giardia and the diseases they cause is referred to these reviews.