Prognostic value of 'C' reactive protein in tuberculosis.

'C' reactive protein (CRP) levels were determined in 100 cases of tuberculosis and 30 age and sex matched children. Serial estimations, one and 3 to 6 months after initiation of therapy was done in 81 and 41 of these patients, respectively. Mean initial levels of CRP in tuberculosis group was 18.52 micrograms/ml while in the control group it was 2.77 micrograms/ml (p less than 0.001). The elevated CRP levels fell significantly to 5.93 micrograms/ml after one month of treatment (p less than 0.001) and by 3 to 6 months of treatment had fallen to normal values. The fall in CRP levels correlated with clinical response. It is concluded that CRP can serve as a sensitive indicator of activity of the disease and the return to normal values of initially elevated CRP levels may indicate a good therapeutic response.