Cord formation in BACTEC medium is a reliable, rapid method for presumptive identification of Mycobacterium tuberculosis complex.
نویسندگان
چکیده
Serpentine cord formation in BACTEC 12B medium was evaluated as a rapid method for the presumptive identification of M. tuberculosis complex. Kinyoun acid-fast stained smears were prepared from 666 positive BACTEC 12B bottles and examined for the presence or absence of serpentine cording. Cord formation had a sensitivity, specificity, positive predictive value, and negative predictive value of 89.2, 99.2, 98.5, and 94.2%, respectively. The evaluation of the presence of cord formation in BACTEC 12B medium is reliable and permits the rapid presumptive reporting of M. tuberculosis.
منابع مشابه
Differentiation of Mycobacterium tuberculosis from other mycobacteria with rho-nitrobenzoic acid using MGIT960.
SETTING Mycobacteria growth in media with the addition of inhibitory substances has been used in species identification. Growth of the Mycobacterium tuberculosis complex (MTC) is inhibited by rho-nitrobenzoic acid (PNB), whereas non-tuberculous mycobacteria (NTM) are resistant. OBJECTIVE To develop a rapid PNB test using the automated BACTEC MGIT960 system and to evaluate its usefulness in th...
متن کاملAssessment of morphology for rapid presumptive identification of Mycobacterium tuberculosis and Mycobacterium kansasii.
Mycobacterium tuberculosis often exhibits serpentine cording when grown in liquid medium, whereas Mycobacterium kansasii can be larger and cross-barred. We assessed the use of these morphologic characteristics as a cost-effective method for rapid presumptive identification of isolates from BACTEC bottles. Without specific training, using the Kinyoun acid-fast stain, definitive cording was found...
متن کاملRapid identification of Mycobacterium tuberculosis in BACTEC MGIT960 cultures by in-house loop-medicated isothermal amplification.
Definitive diagnosis of tuberculosis (TB) by conventional culture, followed by bacterial identification based on biochemical tests is time-consuming and tedious. Simple loop-mediated isothermal amplification (LAMP) specific for Mycobacterium tuberculosis complex, targeting the M. tuberculosis 16S ribosomal RNA gene, termed TB-LAMP, was evaluated as an alternative for rapid culture confirmati...
متن کاملEnhanced Amplified Mycobacterium Tuberculosis Direct Test for detection of Mycobacterium tuberculosis complex in positive BACTEC 12B broth cultures of respiratory specimens.
The reliability of the Gen-Probe enhanced Amplified Mycobacterium Tuberculosis Direct Test (MTD) for identification of Mycobacterium tuberculosis complex (MTBC) in BACTEC 12B broth cultures of respiratory specimens was evaluated by testing aliquots from 268 bottles with a growth index of >/=50. MTD results were compared to those obtained by usual laboratory protocol, whereby MTBC was identified...
متن کاملAssessment of use of the COBAS AMPLICOR system with BACTEC 12B cultures for rapid detection of frequently identified mycobacteria.
The use of the COBAS AMPLICOR System (Roche Molecular Diagnostics, Basel, Switzerland), the only automated system for PCR testing, was evaluated for a rapid identification of mycobacteria with positive BACTEC 12B cultures. Two hundred ninety-six specimens with a growth index of >/=30 were analyzed for the presence of Mycobacterium tuberculosis complex, Mycobacterium avium, and Mycobacterium int...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Journal of clinical microbiology
دوره 36 9 شماره
صفحات -
تاریخ انتشار 1998