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Study of brucellosis in a pastoral community and evaluation of the usefulness of clinical signs and symptoms in differentiating it from other flu-like diseases.

A study of differentials causing flu-like symptoms (malaria, typhoid, streptococcal infections and rheumatoid arthritis) in 488 patients from a pastoralist area is presented. The potential usefulness of clinical signs, symptoms and diagnostic tests in ruling-in or ruling-out these diseases was investigated in the District hospital and three outlying health dispensaries. For each patient a detailed clinical history plus diagnostic test for brucellosis, typhoid, streptococcal infections and rheumatoid arthritis, and for some patients malaria were conducted. Incidence levels of these diseases were estimated using laboratory test results; brucellosis, 13%, typhoid, 40%: streptococcal infections, 6% malaria, 9%: and rheumatoid arthritis, 10%. Brucellosis could not be differentiated clinically from the other flu-like diseases but rheumatoid arthritis could.