Analysis of bacteriology test result of 574 TB suspected patients

Objective This study was designed tO investigate the prevalence situation of Mycobacterium infection in Xi'an City，Shanxi Province and provide a scientific basis of tuberculosis prevention and therapeutic measure．Methods Xi'an City was choosed as the investigatory city for this study and the sample investigation was carried out．All the sputum specimens were collected from the suspected patients who suffered from TB．Sputum samples were tested by smear slide microscopy and culture method．The clinical isolate strains were determined to the species of Mycobacterium by the identified media．Results 574 suspect patients were tested．The number of smear positive and culture positive was 113(19.69％) and 150 (26.13％) respectively．There WaS significant difference between the two methods (X2=360.50，p<0.01)．154 patients were diagnosed with tuberculosis by smear or culture positive result，the positive rate was 26.83％．251 strains isolated from 137 patients in which the infection rate was 67.88％. 5.84％，11.68％ and 14.60％ by MTB,M．Bovis，NTM，and mix infected by two species of mycobacterium respectively．Conclusion The sensitivity of sputum culture is much better than that of smear slide microscopy method．The prevalence situation of NTM infection must be pay more attention especially．