**Question:** After initiation of DOTS therapy for category-I, first sputum examination is done at: March 2010

**Core Concept:** DOTS (Directly Observed Treatment, Short course) is a strategy for the management of tuberculosis (TB) patients developed by the World Health Organization (WHO). The first sputum examination is part of monitoring the progress of TB treatment and assessing the effectiveness of the therapy.

**Why the Correct Answer is Right:** The correct answer is not mentioned in the options provided. However, I will explain the rationale behind when the first sputum examination is done in the context of DOTS therapy.

In the context of DOTS therapy, the first sputum examination is conducted prior to starting the therapy to determine the initial Mycobacterium tuberculosis (MTB) culture and sensitivity results. These results help in determining the appropriate treatment regimen for the TB patient.

**Why Each Wrong Option is Incorrect:**

A. March 2010: This is a specific date, which does not accurately represent when the first sputum examination should be done in the context of DOTS therapy.

B. After 2 weeks of therapy: The first sputum examination should ideally be done at the initiation of therapy, not after 2 weeks.

C. After 1 month of therapy: The first sputum examination should be done at the start of therapy, not after 1 month.

D. After 2 months of therapy: Similar to options B and C, the first sputum examination should be done at the start of therapy, not after 2 months.

**Clinical Pearl:**

The first sputum examination is crucial in determining the initial MTB culture and sensitivity results, which are essential for selecting the appropriate treatment regimen for the TB patient. In the context of DOTS therapy, conducting this examination should be done at the initiation of therapy, not at a specific date or after a certain duration of therapy.

**Correct Answer:** The first sputum examination should be performed at the initiation of DOTS therapy.