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Health officials keep an eye on the insect's population because mosquitoes and other pests can spread certain diseases in the city.
Pest-borne diseases typically occur at a low rate. "There are no more than 10 cases of dengue fever each year," Zhou said at a press conference Thursday. "The majority of the cases involve travelers who contracted the disease while visiting Southeast Asia or Africa."
Japanese encephalitis is one of the most common pest-borne diseases. It primarily occurs in the city's migrant population Cheap Adidas Ultra Boost Parley , which does not have a systematic vaccination record, said Li Zhongyang, vice director of the Shanghai Municipal Health Promotion Committee.
Health authorities have undertaken new measures to track pest control equipment Cheap Ultra Boost Parley , such as rat traps and fly catchers, in residential compounds.