Abstract: Objective To analyse the diagnostic value of the cerebrospinal fluid manifold tests in detected ofearly stage tuberculous menigitis of patients . Method Choice had diagnosed of 52 cases with early stage tuberculousmenigitis of patients . C S Fhad sent examinations separately for routine ,bioche mistry , A D A, P C R, B A C T E C,smearand resistance tuberculous antibody . C S Froutine and biochemistry of change were observed after treatment for twomonths . Results P C R and A D A of detection is significance for diagnosis of initial tuberculous menigitis ,besides C S Froutine and bioche mistry . The other tests are without obvious significance for initial diagnosis ,because theirpositive rate is very low . The cell count had recovered at first ,sugar is secondary after treatment for two months . Conclusion The routine ,biochemistry , P C Rand A D Ain C S F of detection is valuable for diagnosis of early stagetuberculous m enigitis .

Key words: Tuberculosis, meningeal, Laboratory, Detection