Barely two months after a 25-year-old doctor at Nair hospital succumbed to dengue, four psychiatrists at the hospital have now tested positive for the disease. Two of them are in the intensive care unit (ICU).Doctors at the hospital are upset that even after 25-year-old resident doctor for preventive and social medicine Sumedh Pazare’s death on January 1, the hospital has done little to take precautionary measures to contain the spread of the disease.The four who have contracted the disease are second and third year resident doctors from the department of Psychiatry. Dr Ashish and Dr. Mahesh (they refused to divulge their surnames) are both in the intensive care unit, while other two female doctors who tested positive, are on leave and resting in their hostels.Dengue cases during this season are unusual, said doctors, who are finding it difficult to find the breeding spot in the campus for the Aedes mosquito that spreads the disease.Dr Ramesh Bharmal, dean of the Nair hospital said: “Both the doctors who have been admitted are doing well. Because they are doctors and our staff, we are taking extra care and admitted them in the ICU. We are very cautious after we lost one doctor last month.”The pesticide control department at the institute was pressed into action to find out whether there were any breeding spots for mosquitoes near the department of psychiatry, said Bharmal. “It is very strange that four doctors from one department tested positive for dengue. But our pesticide department regularly fumigates the campus,” he said.One resident doctor, who did not wish to be named, said there were mosquitoes on the campus and that cleanliness was a major issue.At Jaslok Hospital, Dr Om Srivastava, director, department of infectious diseases told Mirror he had seen six cases of dengue in the last 15 days. “It is quite strange, but what we are seeing is that the dengue season which is during the monsoon and a little after, is now lingering for a longer period. The time between getting infected by the virus and becoming acutely ill has decreased, leading to many patients getting admitted to the ICU. It all depends on the patients’ immunity too. We see sudden blood platelet loss in dengue cases.”Dr Khusrav Bajan, consultant physician, Hinduja hospital, said, “The Aedes egypti mosquito, which transmits dengue, is known to be aday biter and breeds in clean water. We see most of the cases during the rains, but now we are seeing them throughout the year. We always try to tell people that the mosquitoes breed in and around the home where water stagnates. We tell them to clean out these areas regularly.”According to the health department of BMC, there have been 925 dengue cases and eleven deaths from the disease in 2013. In 2012, there were 1,008 dengue positive cases and five deaths.