The relationship between bilharziasis and typhoid fever employing the Widal test as a screening procedure.
D000372:Agglutination Tests; D006801:Humans; D012485:Salmonella typhi / Q000276:immunology; D012552:Schistosomiasis / Q000150:complications* / Q000175:diagnosis; D014435:Typhoid Fever / Q000150:complications* / Q000175:diagnosis