<prompt> Major signs included by WHO for AIDS diagnosis -Chronic diarrhea 1 monthChronic cough 1 monthChronic fever 1Weight loss of at least 10 of body weight  <response>: The initial evaluation of a patient with HIV infection and diarrhea should include a set of stool examinations, including culture, examination for ova and parasites, and examination for Clostridium difficile toxin.In patients for whom this diagnostic evaluation is nonrevealing, a presumptive diagnosis of HIV enteropathy can be made if the diarrhea has persisted for 1 month. Harrisons Principles of internal medicine, 20th edition, page 1511 