| frequency of intestinal parasites among food-handlers in khartoum, sudan. | food-handlers (n = 1500) attending the public health laboratory in khartoum, sudan, for annual check-ups were screened for intestinal parasites by 3 different techniques (direct faecal examination, formol-ether concentration and floatation) to evaluate the adequacy of annual screening. results showed that 29.4% of food-handlers were harbouring intestinal protozoa in stool samples: entamoeba coli in 15.3%, giardia lamblia in 9.7%, and enta. histolytica in 4.3%. moreover, 2.7% of food-handlers har ... | 2009 | 20214122 |