A 'case' in TB is defined as -: (A) X-ray positive, (B) Culture positive, (C) Sputum AFB positive, (D) Tuberculosis positive
Answer is C. - the case in tuberculosis is defined as the one in which sputum positive for acid fast bacilli is detected. Reference: Park's textbook of preventive and social medicine, 23rd edition, pg no:182 <\p>