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As part of the U. S. P. H. S. project in Liberia, a clinical laboratory survey of the major infectious diseases of 5 sections of Liberia was done during the year of 1947 and the first half of 1948. A total of 8,846 persons was selected as a fair sample of clinic admissions and were given routine stool, urine and blood examinations and some special tests.
In all of the areas studied intestinal helminthiasis ranked highest in relative prevalence, followed in most instances by the diarrheas-dysenteries, treponemiasis and malaria.
In the Sanoquelle District T. gambiense were found in gland puncture or blood smear or both in 19 per cent of a series of routine clinic patients. This is evidently the area of highest trypanosomiasis incidence in the Republic. The Sanoquelle District is also the area of greatest schistosomiasis concentrations. A routine urine survey of the leprosy colony in this district revealed 16 per cent with S. hematobium while 2 per cent of their stools showed S. mansoni.
A detailed and repeated study of the stools of leprosy patients over a 3-year period revealed that 36 per cent of them harbored E. histolytica during the period, most of them having intermittent bouts of diarrhea or dysentery.
The high incidence of individual mycotic infections and of some of their etiological combinations are presented as well as a comparative study of the microbic flora of tropical ulcers during the dry and wet seasons in Liberia.
1 Senior Surgeon, U. S. P. H. S., Chief, Laboratory and Medical Research Mission in Liberia, U. S. P. H. S. 1947 to 1948.
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