Coimbatore: The city corporation's health department, along with the district administration, has launched measures to combat dengue and fever cases, which are on the rise across the district. To help keep mosquito-borne diseases at bay, they have ordered medical camps be set up across the districts and distribution of nilavembu kashayam and papaya leaf extracts to the public. On Thursday evening, 12 patients were being treated for dengue at the Coimbatore Medical College and Hospital. The number of patients that began increasing around the beginning of June, has shown no signs of falling so far. The corporation limits alone recorded 30 dengue cases in June. The number of fever cases too has remained above 90 in the government hospital. To battle the growing number of fever cases and ensure even dengue does not progress into a serious state, the district collector has ordered all schools to conduct medical camps for their students. "All fever cases showing symptoms of the dengue virus like extreme tiredness, fainting and body pain should be referred to CMCH immediately," said an official from the collectorate. "This instruction also applies to all private doctors and hospitals, because we prefer that dengue and H1N1 patients get treated and monitored at GH," he said. Mosquito prevention methods, such as checking and removing mosquito breeding sources, were also reviewed with sanitary inspectors and officers. "We have ordered inspectors to spray insecticide and abate medicine into not only the drains but also into all open wells and overhead tanks too," said an official statement from the district administration. "We have asked corporation, panchayat conservancy workers and sanitary workers to go door to door to check for mosquito breeding sources like tyres or paper cups etc," it said. In an appeal, general public has also been requested to co-operate with the sanitary workers coming to inspect their homes to check for breeding sources. On Saturday, director of public health, Dr P Kolandaisamy, said the State had already recorded 3,200 dengue cases, close to the 4,000 dengue cases recorded through the whole of 2016. He also mentioned that the dengue spreading Aedes aegypti was changing its breeding ground to even open wells.