Le khithi ifanele ukutholwa kwekhwalithi yezindawo eziyinhloko zokuguqula amasampula esikhwehlela somuntu aqoqwe ezigulini ezine-Tubercle bacillus positive eziholela ekumelaneni ne-mycobacterium tuberculosis isoniazid: Isifunda se-InhA sokukhuthaza -15C>T, -8T>A, -8T>C;Isifunda somgqugquzeli we-AhpC -12C>T, -6G>A;ukuguqulwa kwe-homozygous kwe-KatG 315 codon 315G>A, 315G>C.