Sunday, July 8, 2018

PRO/AH/EDR> St Louis encephalitis virus - USA: (CA)

ST LOUIS ENCEPHALITIS VIRUS - USA: (CALIFORNIA)
***********************************************
A ProMED-mail post
<http://www.promedmail.org>
ProMED-mail is a program of the
International Society for Infectious Diseases
<http://www.isid.org>

Date: Fri 6 Jul 2018
Source: The Business Journal [edited]
<https://thebusinessjournal.com/fresno-county-mosquitoes-test-positive-for-encephalitis/>


The Fresno Mosquito and Vector Control District has confirmed that
_Culex_ mosquitoes in Fresno have tested positive for the Saint Louis
encephalitis (SLE) virus.

According to a press release from the Fresno County Department of
Public Health (FCDPH), the infected mosquitoes were found in the areas
of East Floradora Avenue and Highway 41, and Shields and Van Ness
avenues. The notification was made by the FCDPH on Thursday [3 Jul
2018].

SLE virus is mosquito-transmitted and causes inflammation of the brain
(encephalitis). Most infected persons have no apparent signs of
illness, but symptoms can include fever, headache, dizziness, nausea
and fatigue. The time from when an individual is bitten by an infected
mosquito to onset of illness can range from 5-15 days. Signs and
symptoms last from a period of several days to a week.

Severe symptoms include fever, headache, stiff neck, confusion, and an
altered level of consciousness. Coma, convulsions, paralysis and
sometimes death may occur (with a 5-15 percent overall case fatality
ratio). Elderly people and those with a weakened immune system are
more at risk for developing severe symptoms of the disease.

There is no specific vaccine for SLE, and health care providers should
evaluate individuals who believe they are at risk. FCDPH has
recommended the use of repellent along with permethrin, an insecticide
used for clothing. The department further advised persons to wear
protective clothing and avoiding the peak biting hours between dusk
and dawn when possible.

FCDPH also cautioned against leaving standing water around the house
and changing it whenever possible to avoid the laying of eggs.

[Byline: Donald A. Promnitz]

--
Communicated by:
ProMED-mail
<promed@promedmail.org>

[This is the 1st report of the presence of St Louis encephalitis [SLE]
virus in California this year [2018]. Active SLE virus transmission
occurred in several locations in California last year (2017) in
localities where it has been absent for many years. Residents in the
Fresno area will be wise to follow the advice for avoidance of
mosquito bites that is offered above by the FCDPH, since there is a
long transmission season of several months ahead.

SLE virus is endemic in the southwestern USA, and sporadic cases in
humans occur there infrequently. In 2015, human cases occurred in the
adjoining states of Nevada and Arizona, and positive mosquitoes were
found in California. SLE virus was found in mosquitoes in Nevada in
2005.

Wild birds are the reservoir hosts, and mosquitoes in the genus
_Culex_ are the vectors that transmit SLE virus. The mosquito species
in which SLEV was detected are not mentioned in the above report. -
Mod.TY

A map of California counties can be accessed at:
<http://geology.com/county-map/california.shtml>.

HealthMap/ProMED maps available at:
United States: <http://healthmap.org/promed/p/106>
California, United States: <http://healthmap.org/promed/p/204>]

[See Also:
2017
----
St Louis encephalitis virus - USA (05): (CA)
http://promedmail.org/post/20171210.5493753
St Louis encephalitis virus - USA (04): (ID)
http://promedmail.org/post/20170920.5329209
St Louis encephalitis virus - USA (03): (CA)
http://promedmail.org/post/20170906.5298854
St Louis encephalitis virus - USA (02): (CA)
http://promedmail.org/post/20170818.5258003
St Louis encephalitis virus - USA: (CA)
http://promedmail.org/post/20170808.5236278
2016
----
St Louis encephalitis virus - USA (05): (CA)
http://promedmail.org/post/20161119.4641379
St Louis encephalitis virus - USA (04): (CA)
http://promedmail.org/post/20161023.4578634
St Louis encephalitis virus - USA (03): (NV)
http://promedmail.org/post/20160903.4463247
St Louis encephalitis virus - USA (02): (CA)
http://promedmail.org/post/20160902.4459222
St Louis encephalitis virus - USA: (NV)
http://promedmail.org/post/20160828.4446524
2015
----
St. Louis encephalitis & West Nile viruses - USA (02): (AZ)
http://promedmail.org/post/20151213.3859129
St. Louis encephalitis and West Nile viruses - USA (AZ)
http://promedmail.org/post/20150821.3594184
2010
----
St. Louis encephalitis - USA (03): (TX) conf.
http://promedmail.org/post/20101103.3975
St. Louis encephalitis - USA (02): (TX)
http://promedmail.org/post/20101021.3811
St. Louis encephalitis - USA: (TX)
http://promedmail.org/post/20101014.3726
2006
----
St. Louis encephalitis, avian - USA (MO): corr.
http://promedmail.org/post/20061022.3036
St. Louis encephalitis, avian - USA (MO)
http://promedmail.org/post/20061021.3027
2005
----
St. Louis encephalitis virus, mosquitoes - USA (NV)
http://promedmail.org/post/20050612.1642
2003
----
St. Louis encephalitis - USA (Arizona)
http://promedmail.org/post/20031015.2601]
.................................................jh/ty/msp/jh
*##########################################################*
************************************************************
ProMED-mail makes every effort to verify the reports that
are posted, but the accuracy and completeness of the
information, and of any statements or opinions based
thereon, are not guaranteed. The reader assumes all risks in
using information posted or archived by ProMED-mail. ISID
and its associated service providers shall not be held
responsible for errors or omissions or held liable for any
damages incurred as a result of use or reliance upon posted
or archived material.
************************************************************
Donate to ProMED-mail. Details available at:
<http://www.isid.org/donate/>
************************************************************
Visit ProMED-mail's web site at <http://www.promedmail.org>.
Send all items for posting to: promed@promedmail.org (NOT to
an individual moderator). If you do not give your full name
name and affiliation, it may not be posted. You may unsub-
scribe at <http://ww4.isid.org/promedmail/subscribe.php>.
For assistance from a human being, send mail to:
<postmaster@promedmail.org>.
############################################################
############################################################

List-Unsubscribe: http://ww4.isid.org/promedmail/subscribe.php

0 comments:

Post a Comment