The districts are - Ambala, Fatehabad, Kaithal, Narnaul, Kurukshetra, Panchkula and Yamunanagar, an official spokesman said here today.
Before this, 'DOTS PLUS' activities for the diagnosis and treatment of multi-drug resistant TB cases were launched in seven districts including Bhiwani, Jind, Jhajjar, Karnal, Panipat, Sonepat and Rohtak.
The Public Health Laboratory at Karnal has been upgraded to state-level intermediate reference laboratory for testing multi drug resistant TB cases, he said.