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  • Title: Detection of Mycobacterium tuberculosis growth by direct microscopic observation has a lower cost, higher sensitivity and higher diagnostic value than liquid and solid media cultures.
    Author: Olaru-Peter S, Grigoriu C, Boiculese LV, Gradinaru AC, Macovei II, Diculencu D, Grigoriu B.
    Journal: Indian J Med Microbiol; 2014; 32(3):315-7. PubMed ID: 25008828.
    Abstract:
    BACKGROUND: Culture is needed to confirm tuberculosis but results are generally obtained after several weeks. OBJECTIVES: We compared a direct microscopic observation technique for detection of mycobacterial culture positivity (MODS) with the classic solid and MB/BacT cultures in terms of sensitivity, contamination rate, speed and cost on 488 samples. RESULTS: The sensitivity of the MODS technique--99,2% (162 positive samples) was higher than MB/BacT 78,4% (125 positive samples) and solid culture 69,6% (113 positive samples) P<0.005 for all comparisons. The median times to positivity were 21, 13.3 and 3 days on solid media, B/BacT and MODS respectively. CONCLUSIONS: The MODS technique is faster and more sensitive than both solid media and MB/BacT culture.
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