Objective To evaluate the diagnostic accuracy of different laboratory approaches for tuberculous peritonitis(TP).Methods The clinical data of patients with suspected TP who were mainly manifested as ascites in Peking Union Medical College Hospital from January 2014 to June 2017 were retrospectively analyzed. Ascites samples were tested with different diagnostic approaches,including acid fast stain,culture for mycobacterium,real-time polymerase chain reaction for identifying DNA of mycobacterium tuberculosis,and T-cell spot of tuberculosis test(T-SPOT.TB). Results Totally 163 cases aged 15-84 years [mean±SD:(50±17)years] with complete data were enrolled,among whom 82(50.3%) were males and 81(49.7%) were females. Finally,27 patients were confirmed as TP,which was excluded in the other 136 cases. The sensitivity and specificity of ascites acid fast stain were 0% and 100%,respectively,followed by ascites culture for mycobacterium(21.74% and 100%),real-time polymerase chain reaction for DNA of mycobacterium tuberculosis in ascites(18.52% and 100%),T-SPOT.TB on ascites(95.42% and 61.90%),and T-SPOT.TB on peripheral blood(76.19% and 80.18%). Conclusion The diagnosis of tuberculous peritonitis remains challenging because of the limitations of the currently available diagnostic tests. Diagnosis should also be based on clinical manifestations and auxiliary examinations.
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