A brief review of TB combat programms in Iran A brief biography of Dr. Abolhassan Ziazarifi as founder of TB lab’s in Iran A delay in the diagnosis of TB is a significant challenge for control and containment of this contagious and detrimental disease The interpretation of Tuberculosis laboratory results: smear & culture Quality control programs in Mycobacteriology Laboratory The significance of direct smear and the gold standard culture test in comparison with other methods such as PCR in the diagnosis of TB