AIDS (High risk groups) Chronic alcoholism - Homosexually/heterosexually Diabetes mellitus promiscuous - Intravenous drug addicts Endocrine disorders - STD patients Epilepsy - H/o prolonged fever Filariasis - H/o unexplained weight loss Hepatitis B carriers - H/o intractable diarrhoea Kidney disease Allergy (severe) Kala azar Abnormal bleeding disorder Chronic liver disease Cardiovascular disorder e.g. Malignancy hypertension, myocardia infarction, angina pectoris Sexually transmitted diseases Cerebrovascular disorders Tuberculosis (active)