“Initial reports suggest severe infection led to this unfortunate incident. We will ensure best treatment to them,” said Thrissur medical college superintendent Dr K Balagopalan on Wednesday.
All four, in 65-75 age group, had undergone surgery in last three weeks.
Ordering an inquiry, Kerala health minister VS Siva Kumar said, “We will take strict action against those responsible for this”. The state government would bear the medical expenses of all four patients, he added.
Kumar ordered the hospital to stop all surgeries. Three of the four patients are in Thrissur Medical College while one has been admitted to a private hospital.