Mosquito Monitoring Survey

Since fiscal 2011, we have been conducting regular mosquito monitoring surveys on mosquito-borne infections, including dengue fever and chikungunya fever.
From 2015, we have added implementation locations from the viewpoints of "many users", "many tourists visit", and "many events are held".
In fiscal 2019, with the holding of the Rugby World Cup 2019 TM and the Tokyo 2020 Olympic and Paralympic Games, we expanded the number of research locations around both competition venues.
The virus has never been detected in mosquitoes we have investigated so far.

• Implementation site: 25 parks and harbor districts in the city (19 places until 2014)
• Date of implementation: June to October (6 locations started in May in FY2019)
• Survey contents: Mosquito habitat status (types and density of inhabiting, etc.) and possession status of viruses that cause major mosquito-borne infections (dengue virus, etc.)
• List of survey locations for FY2019 (PDF: 52KB)

Please see each page of Yokohama City Inst. of Health for an overview of mosquito habitat surveys and past virus test results.
In addition, about Aedes albopictus, you can see test result bulletin on page of Yokohama City Inst. of Health "pathogen information".

• Virus test results of mosquito-borne infectious diseases in Yokohama City
• Inspection Information Monthly Report January 2020 Issue of Mosquito Adult Inhabitants Survey Results in Yokohama City (May to October 2019)

• Virus test results of mosquito-borne infectious diseases in Yokohama City
• Inspection Information Monthly Report January 2019 Issue Mosquito Adult Inhabitants Survey Results in Yokohama City (May to October 2018)

• June 1, 2017 "We call on mosquito measures by bus and subway-do not increase mosquitoes this summer! Don't be bitten by mosquitoes!" （PDF：409KB）
• May 18, 2016 "Strengthen prevention enlightenment of mosquito-borne infectious disease" (PDF: 900KB)
• June 2, 2015 "we start monitoring investigation of mosquito in 25 places in the city!" （PDF：786KB）