Table 1 Responding to MVEV surveillance signals Surveillance signal Abnormal numbers of Detection of MVEV in Recent MVEV Evidence of recent vectors mosquitoes seroconversion in MVEV infection in animals humans Aim of responding to To provide early notification to relevant human and animal public health agencies and implement appropriate signal public health control measures Risk assessment Consider location, type Consider location of Location of positive Case investigation – and distribution of positive samples in animal or chicken sample includes confirmation of abnormal vector relation to humans, in relation to humans, onset date, symptoms, numbers, relative history of flavivirus test history of test results laboratory tests, possible abundance of mosquito results from this trapping from this site, triangulate source of infection. Case vectors, consistency with site, relative abundance with vector surveillance exposure history – previous surveillance of mosquito species, information, current probable location of data, current and comparison with climate conditions, time exposure, triangulate ongoing weather mosquito trapping data of year and future with animal and vector conditions from other sites, current weather outlook, history surveillance data if and future weather of MVEV outbreaks in the available, current climate conditions, history of region conditions, time of year MVEV outbreaks in the and future weather region outlook, history of MVEV outbreaks in the region (Appendix 2 MVEV SoNG contains detailed case investigation steps)
Table 1 Responding to MVEV surveillance signals Surveillance signal Abnormal numbers of vectors Detection of MVEV in mosquitoes Recent MVEV seroconversion in animals Evidence of recent MVEV infection in humans Aim of responding to signal To provide early notification to relevant human and animal public health agencies and implement appropriate public health control measures Risk assessment Consider location, type and distribution of abnormal vector numbers, relative abundance of mosquito vectors, consistency with previous surveillance data, current and ongoing weather conditions Consider location of positive samples in relation to humans, history of flavivirus test results from this trapping site, relative abundance of mosquito species, comparison with mosquito trapping data from other sites, current and future weather conditions, history of MVEV outbreaks in the region Location of positive animal or chicken sample in relation to humans, history of test results from this site, triangulate with vector surveillance information, current climate conditions, time of year and future weather outlook, history of MVEV outbreaks in the region Case investigation – includes confirmation of onset date, symptoms, laboratory tests, possible source of infection. Case exposure history – probable location of exposure, triangulate with animal and vector surveillance data if available, current climate conditions, time of year and future weather outlook, history of MVEV outbreaks in the region (Appendix 2 MVEV SoNG contains detailed case investigation steps)
framework-mvev-2013v2.docx