• Natl Med J India · Jul 2024

    Evaluation of 3-year tuberculosis external quality assessment results of public health laboratories.

    • Edibe Nurzen Namli Bozkurt, S Nilay Uçarman, Ahmet Arslantürk, Alper Saribas, Derya Altun, Hamit Özsaraç, and Hulya Simsek.
    • Department of Microbiology Reference Laboratories and Biological Products, General Directorate of Public Health, Ankara, Turkey.
    • Natl Med J India. 2024 Jul 1; 37 (4): 191194191-194.

    AbstractBackground We aimed to evaluate the 3-year participation status of tuberculosis (TB) laboratories in public health laboratories (PHL) tuberculosis external quality assessment (EQA) and EQA results. Method During 2018-2020, PHLs participated in the EQA programme organized annually by the National Tuberculosis Reference Laboratory (NTRL). Five kinds of EQA samples were sent to the participating laboratories on three parameters, including microscopy, culture and phenotypic first-line drug susceptibility testing and they were asked to perform according to the standard protocol. The results were taken over by the Tuberculosis Laboratories Surveillance Network (TULSA) web system and analysed. Results A total of 24 PHLs participated in the EQA in 2018; 30 in 2019 and 23 in 2020. In terms of sensitivity, specificity, accuracy and reproducibility in microscopy, respectively, in 2018, 20 of the laboratories were 100%, 4 of them 80%, and in culture 16 of them were 100% and 2 of them 80%; in 2019, 28 of them were 100%, 2 of them 80%, and in culture 11 of them were 100%, 6 of them 80%, 1 of them 60%; in 2020, 20 of them were 100%, 3 of them 80%, and in culture 13 of them were 100% and 3 of them 80%. Conclusion It is beneficial for laboratories working on TB to participate in EQA in terms of evaluating the accuracy and reliability of the method used.

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