The Department of Disease Control revealed that the number of patients with “dengue fever” and “malaria” was 3-4 times higher than last year, clarifying chemical sprays to kill mosquitoes. Still effective in killing mosquitoes 90% after Japan, researching mosquitoes, Vietnam, Cambodia began to resist chemicals.
On January 16, Dr. Tares Krassanaiwiwong Director-General of the Department of Disease Control said that Thailand now has more reports of mosquito-borne communicable diseases, including dengue and malaria. In 2022, 45,145 cumulative dengue patients were found, 4.5 times more than in 2021, with 31 confirmed deaths from dengue fever. In 2022, there were 10,174 cumulative cases, 3 times higher than in 2021 and likely to increase continuously in 2023. Provinces with the highest number of patients are Tak, Mae Hong Son and Kanchanaburi, most of them are foreigners and there are 2 deaths. As for fever, joint pain, mosquito bites, there were 1,370 cumulative cases, although there were no reports of deaths, but the number of cases was twice as high as in 2021. Zika virus infection found 66 cumulative cases, 20 of which were pregnant women. There was also 1 small head infant and elephantiasis found 4 new cases.
Dr. Sophon Iamsirithavorn Deputy Director-General of the Department of Disease Control said that there are many types of mosquitoes in Thailand. that are disease carriers, including Aedes mosquitoes carrying dengue fever Fever, joint pain, Aedes aegypti, and Zika, anopheles mosquito that carries malaria. Tiger mosquitoes carry elephantiasis And nuisance mosquitoes bring encephalitis and some types of filariasis. The mosquito life cycle has 4 stages: egg, larvae, larvae and adults. The adult female stage is the stage that feeds on blood. to develop eggs causing the spread of disease Prevention and control of the disease must be combined with a number of methods, such as reducing breeding sites. manage the environment prevent mosquito bites Use chemicals to kill mosquitoes. especially the outbreak If sick or suspected, must hurry to see a doctor for diagnosis and treatment. Do not buy self-medication, especially NSAIDs such as ibuprofen, diclofenac, aspirin, including a set of drugs that cause gastrointestinal bleeding easily. difficult to treat risk of death
Dr. Chantana Phadungthos, director of the Division of Insect-Borne Diseases, said the use of chemicals to control mosquito vectors, such as spraying chemicals to kill adult mosquitoes. There is a need to stop the spread of the disease from spreading. And prevent infected mosquitoes from biting and spreading the disease to others chemical spray It must be done correctly, promptly and according to standards. In the scope of the outbreak, in addition, larval breeding sites must be destroyed to prevent new mosquitoes from emerging. Spraying must select the chemicals and concentrations recommended by the World Health Organization. And has been registered by the FDA. Do not spray too often unnecessarily. To prevent the resistance of mosquitoes to chemicals.
From the current news, Japanese researchers present a research report that Mosquitoes in Vietnam and Cambodia are resistant to pyrethoids. It is a study to warn countries in Southeast Asia and Asia. Be aware of the surveillance of mosquitoes in that area. Is there chemical resistance? And proposed to switch insecticides to control mosquitoes. The Division of Infectious Diseases carried by insects has studied the efficiency of pyrethroid chemicals in killing Aedes aegypti mosquitoes. Using the method of fogging and spraying ULV in 12 areas, namely Chiang Mai, Tak, Phichit, Nakhon Pathom, Chachoengsao, Maha Sarakham, Udon Thani, Nakhon Ratchasima, Ubon Ratchathani, Phang Nga, Songkhla and Bangkok, it was found that it was still effective in controlling Aedes aegypti mosquitoes. Kills more than 90% of Aedes mosquitoes
