Evaluation of Thin Layer Agar 7H11 for Direct Susceptibility Testing of Mycobacterium Tuberculosis Complex against Second Line Anti Tuberculosis Drugs on Smear Positive Specimens.
J Coll Physicians Surg Pak
; 29(6): 520-523, 2019 Jun.
Article
en En
| MEDLINE
| ID: mdl-31133148
ABSTRACT
OBJECTIVE:
To evaluate performance of thin layer agar (TLA) 7H11 method for detection of ofloxacin (OFX) and kanamycin (KM) resistance in smear positive clinical specimens of patients with tuberculosis comparing the results with gold standard MGIT 960 system. STUDYDESIGN:
Cross-sectional validation study. PLACE AND DURATION OF STUDY Department of Microbiology, Armed Forces Institute of Pathology (AFIP), Rawalpindi, from April to September 2017.METHODOLOGY:
Acid fast bacilli (AFB) smear positive specimens submitted at the study place, were inoculated on TLA 7H11 agar. Growth was examined along with susceptibility of OFX and KM and compared with gold standard MGIT 960 system.RESULTS:
One hundred and sixty specimens were evaluated. Sensitivity and specificity of TLA for OFX was found to be 100% and 99.3%, respectively; and PPV and NPV was found to be 90.9% and 100%, respectively. Overall diagnostic accuracy was 99.38%. Sensitivity and specificity of TLA for KM was found to be 80% and 100%, respectively. PPV and NPV was found to be 100% and 99.36%, respectively. Overall diagnostic accuracy was 99.38%.CONCLUSION:
Thin layer agar is reliable, easy to perform and cost effective technique not only for rapid detection of MTB but also for drug susceptibility (DST) of second line anti TB agents. It is a suitable alternative to culture on LJ medium and can also be alternative to MGIT 960 system in resource-poor settings.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Tuberculosis
/
Kanamicina
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Ofloxacino
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Pruebas de Sensibilidad Microbiana
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Técnicas Bacteriológicas
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Farmacorresistencia Bacteriana Múltiple
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Antibacterianos
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Mycobacterium tuberculosis
Tipo de estudio:
Diagnostic_studies
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Observational_studies
/
Prevalence_studies
/
Risk_factors_studies
Límite:
Adolescent
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Adult
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Aged
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Aged80
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Humans
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Middle aged
Idioma:
En
Revista:
J Coll Physicians Surg Pak
Asunto de la revista:
MEDICINA
Año:
2019
Tipo del documento:
Article
País de afiliación:
Pakistán