Orthopedic surgeon Dr Thangchungnunga wrote in the November 2016 issue of 'Hriselna', the state health department house journal, that the people who sent fish to Mizoram injected formalin for its preservation and also for giving a fresh look to the fish.
The allegations of the doctor went viral in the social media causing panic among the people and resulting in the sale of fish going down rapidly.
"Recently we collected samples of vegetables grown in the state for tests to ascertain presence or otherwise of insecticides and pesticides," Lalsawma said.
The tests results were expected soon, he said.