<prompt> 20 years old Rajesh presence with fever and chronic cough ESR 35 mm sputum cytology is negative for AFB and tuberculin test show in durations of 19 X. 23 mm. The probable diagnosis isFungal pneumoniaViral pneumoniaPulmonary T.B.Bacterial pneumonia  <response>: The history and tuberculin test strongly suggests the diagnosis of T.B.Do not get confused by negative sputum cytology because negative sputum cytology does not rule out pulmonary tuberculosis.Sputum cytology is just a presumptive diagnosis - HarrisonThe definitive diagnostic of T.B. depends upon the culture of bacteria obtained from respiratory specimen - HarrisonThe presence of induration 15 mm in size strongly indicates T.B. infection. 