Monday, September 3, 2018

PRO/AH/EDR> Invasive mosquito - USA (03): (MI)

INVASIVE MOSQUITO - USA (03): (MICHIGAN)
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Date: Wed 29 Aug 2018
Source: WNEM [edited]
<http://www.wnem.com/story/38987302/asian-tiger-mosquito-found-in-mi-no-evidence-of-zika>


The invasive Asian tiger mosquito [_Aedes albopictus], which is
capable of spreading the Zika virus, has been found in Michigan, but
officials emphasized that there is no evidence of Zika or other exotic
virus-infected mosquitoes in Michigan or the United States this year
[2018].

Officials from the Michigan Department of Health and Human Services
(MDHHS) and Wayne County Health Department announced that the mosquito
was identified on 16 Aug [2018] in southern Romulus.

"Finding Asian tiger mosquitoes in Michigan is no reason for great
concern. Many of our neighboring states have found them previously and
have not seen Zika transmission from this species," said Dr. Eden
Wells, MDHHS chief medical executive. "However, it is always a good
idea to take precautions against mosquito bites, since other mosquito
species can carry diseases like West Nile virus."

The presence of the mosquito was discovered in Michigan for the 1st
time in 2017. Recently, the species has been found in Nebraska,
Minnesota, Wisconsin and Windsor, Ontario.

This year [2018], 69 birds have tested positive for WNV from 21 of
Michigan's 83 counties.

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[_Aedes albopictus_ is gradually moving northward. The Center for
Disease Control and Prevention's map of geographic areas suitable for
this mosquito includes Michigan
<http://www.cdc.gov/zika/vector/range.html>. This mosquito can enter
diapause and survive winter conditions. It may be that this mosquito
is becoming established in the Upper Midwestern states.

The main risk that this mosquito presents is less for transmission of
Zika virus than for transmission of La Crosse and Jamestown Canyon
viruses, to which it is susceptible. It has been shown in the
laboratory that this mosquito species is susceptible to infection by
both of these orthobunyaviruses. Dual infections by both of these
viruses can result in reassortment of the 3 RNA strands, with all 6
reassortants produced. These 2 viruses can co-circulate in the same
woodlands in places like the Upper Midwest of the USA. Should _A.
albopictus_ become established in ecosystems where these 2 viruses are
endemic, the emergence of new, reassorted viruses is possible. -
Mod.TY

HealthMap/ProMED map available at:
Michigan, United States: <http://healthmap.org/promed/p/225>]

[See Also:
2017
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Invasive mosquito - Canada: (ON)
http://promedmail.org/post/20170823.5268179
Invasive mosquito - USA (07): (OH)
http://promedmail.org/post/20170822.5267616
Invasive mosquito - USA (04): (WI)
http://promedmail.org/post/20170721.5193641
Invasive mosquito - USA (02): (NE)
http://promedmail.org/post/20170607.5090460
Invasive mosquito - USA: (NV,CT)
http://promedmail.org/post/20170602.5078171
2016
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Invasive mosquito - USA (06): (IN)
http://promedmail.org/post/20161024.4579952
Invasive mosquito - USA (05): (OH)
http://promedmail.org/post/20161001.4528980]
.................................................ty/msp/mpp
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