Bengaluru, May 15 : All COVID-19 patients in Karnataka's Mysuru district have recovered and been discharged, an official said on Friday. "All the 90 Corona positive patients from Mysuru district have been discharged without a single mortality," said a health official. Most of the 90 patients contracted the infection from positive case 52, an employee in the quality control department of a pharmaceutical company at Nanjangud, Mysuru. The Karnataka government had also ordered an inquiry into the mysterious coronavirus spread from the drug-making plant. The first positive case in the district was a 35-year-old employee of the drug plant. Overtime, he is followed by 24 colleagues and their kin who also tested positive and are under treatment at the state-run designated COVID-19 hospital in Mysuru. The plant was shut down on April 7 after it was suspected to have been infected by the virus from a container that came from China with the raw material. Jubilant Life Sciences Ltd, the drug company, claimed that no traces of the virus was found in the raw material it imported from China for making drugs at its Nanjangud plant. /IANS