Zarir Udwadia is an Indian pulmonologist and researcher. His extensive work on drug resistant tuberculosis has drawn the attention of the medical community in India and across the world, and led to improvements in India's National Tuberculosis Control Programme. Dr Udwadia was the only Indian invited by the WHO to be part of the TB ‘Guidelines Group’, which formulated the 4th edition of the TB Guidelines, published in 2010. He was also the only doctor to be named among India's best strategists.
Dr Udwadia runs a free weekly TB clinic at the Hinduja Hospital, which he set up in 1992, on his return to India, after his training in the UK. It is now the busiest outpatient clinic at the Hinduja hospital, with patients traveling from many parts of the country, and some lining up overnight, to be seen by him. In December 2011, Dr Udwadia documented twelve cases of what he called totally drug-resistant TB, a strain of the disease that seemed to show resistance to all known treatments. There were only two other episodes of TDR-TB reported in the world before this- in Iran in 2009, and Italy in 2007. Along with his colleagues at the Hinduja Hospital, he published a letter describing four of these cases in the journal Clinical Infectious Diseases. The journal letter prompted extensive media attention. Government officials publicly denied the issue, accused him of wrongly spreading panic, and a Mumbai health official seized patient samples from his laboratory. While the WHO eventually said that defining resistance beyond XDR-TB was not recommended, Dr Udwadia's research drew the attention of the medical community to the growing epidemic of drug-resistant TB. The coordinator of the WHO's STOP TB department called his findings a wake up call. His research eventually led to improvements in the way TB is managed in India, and elsewhere, and forced the government to make changes to the state-run TB control initiative, or the Revised National Tuberculosis Control Programme. The government increased the budget for the program, and dispatched rapid GeneXpert machines, which can conduct highly sensitive molecular diagnostic testing. He continues to be an outspoken critic of the government's failures to address the TB problem, and a vocal advocate for newer diagnosis and treatment for TB patients.