Abstract
PurposeIn this study, our aim was to assess Lowenstein-Jensen (L-J) medium and MGIT culture system for recovery of Mycobacterium tuberculosis (MTB) from abscess samples in skeletal tuberculosis (TB) cases. MethodsAbscess samples were collected from patients suggestive of skeletal TB in Beijing Chest Hospital for laboratory examination, including smear microscopy, L-J culture and MGIT culture. ResultsOf the 232 abscess samples, 72 (31.0%) were culture-positive for mycobacteria. Of 72 isolates recovered, 94.4% were detected in MGIT 960 and 75.0% on L-J medium. MGIT could recover significantly higher rate of MTB isolates from smear-positive specimens than L-J medium. The mean time to detection of MTB in MGIT 960 was significantly lower than that on L-J medium. ConclusionThe BACTEC MGIT 960 outperforms the conventional L-J medium in recovering MTB from abscess samples. The combination of MGIT and L-J method also increases the overall recovery rate of MTB in culture.
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