Source: Annual Congress 2002 - Diagnosis of tuberculosis
Disease area: Respiratory infections

Abstract

Current TB situation in Russia requires active involvement of general medical services in TB detection. It means wide use of microscopic studies by clinical diagnostic laboratories. The Federal Program (1998) and the Federal Act (2001) on TB control were developed in collaboration with the Ministry of Health, the Russian Academy of Medical Sciences and international organizations.
From the very beginning the Program encountered many problems, including absence of external quality control of laboratory studies and mechanisms for its implementation.
We formulated a concept, developed criteria for quality assessment of microscopic studies and methods to prepare control smears and defined composition of test sets. This work was supported by WHO. In 2000 a division for assessment of accuracy, sensitivity and specificity of Ziehl-Neelsen microscopy started to work at the Federal System of External Quality Assessment of Clinical Laboratory Studies (FSEQA). 283 clinical diagnostic laboratories participated in the first cycle of FSEQA-2000. Test results were recognized satisfactory for smears without content of acid-fast bacilli – 95%, for smears with moderate content of acid-fast bacilli – 95% and for smears with critically low content of acid-fast bacilli – 78%.
We suggest, that the most advanced clinical diagnostic laboratories have participated in this voluntary cycle.

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V. Puzanov, G. Evgushchenko, V. Golyshevskaya, M. Shulgina, I. Dorozhkova, S. Popov, V. Malakhov, E. Zaikin (Moscow, Russia). National standards for external quality assessment of microscopic TB detection. Eur Respir J 2002; 20: Suppl. 38, 1061

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