Non-pathogenic intestinal protozoa are found only in the lumen (cavity) of the intestinal tract. They are not found in the cells that line the intestine, and they do not spread to other parts of the body.Infection with single or multiple species of intestinal protozoa is common in humans and can result in either asymptomatic colonization or symptoms of intestinal disease. Of the 204 subjects, 105 were female. The age range of the subjects was 17 to 86 years (mean, 64 years). Seventy-five subjects (37%) experienced a total of 90 episodes of diarrhea. The number of diarrheal cases and the distribution of bacterial findings did not differ statistically significantly between the vaccinees (n = 101) and the controls (n = 103).
With colonoscopy it is possible to detect small ulcers of between 3–5mm, but diagnosis may be difficult as the mucous membrane between these areas can look either healthy or inflamed. To help prevent infection:
•Avoid raw vegetables when in endemic areas, as they may have been fertilized using human feces.
•Boil water or treat with iodine tablets.
•Avoid eating street foods especially in public places where others are sharing sauces in one container