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West Nile Virus Hits
Mexico's Yucatan

From Patricia Doyle, PhD
dr_p_doyle@hotmail.com
8-28-2

Hello Jeff...This is what epidemiologists feard. Birds now will leave Yucatan and head further south into South America. Some will migrate back north to Canada via the Pacific flyway. This will ensure WNV hits the US Pacific coast.
 
This NY99 strain continues to comfound and confuse the "experts."
 
Patricia
 
From ProMED-mail
promed@promedmail.org
8-28-2
 
 
West Nile Virus Detected In Yucatan
 
El Diario (Nuevo Laredo) (Translation by Mod.MPP) (edited)
 
(AFP) -- Researchers from the Autonomous University of the Yucatan detected for the first time in South East Mexico, near Central America, antibodies against the West Nile virus, according to the entomologist Julian Garcia.
 
He said that an analysis of 6 birds captured in the port of Celestun and in the municipality of Tzucacab, 150 km inland in the Yucatan Peninsula, led to the discovery of antibodies against flavivirus, the group to which the West Nile virus belongs. The health authorities of the Yucatan declared an immediate "epidemiologic alert".
 
Garcia mentioned that the West Nile virus was detected for the first time in the Americas in New York State in 1999, and in only 2 years has spread to southern States such as Texas and Florida, precisely the route which migratory birds such as ducks, bluebirds, swallows and flycatchers take from the North, arriving on the coasts of Yucatan. The birds, he added, were infected by the bite of ornithophilic mosquitoes, which feed only on the blood of birds and are transmitters of the virus. This is transmitted to humans when mosquitoes such as _Culex pipiens_ bite the birds and then bite humans.
 
He advised that the illness can be confused with dengue fever as its symptoms include severe headache, a febrile state similar to the flu, swollen glands, neck rigidity and general malaise.
 
http://www.diario.net/nacional/bis/
 
___
 
ProMED-mail <promed@promedmail.org>
 
The statement "the discovery of antibodies against flavivirus, the group to which the West Nile virus belongs" leads me to label this finding only "suspected." St Louis encephalitis (SLE) virus antibodies cross-react with WNV antigen in lab tests -- the first human cases in the USA were initially confused with SLE for this reason -- and SLE virus has been recovered from birds all the way down Central & South America. Next stop for birds flying south from Yucatan is Colombia & Venezuela. - Mod.JW
 
see also: West Nile virus, human, fatal - Mexico ex USA 20020828.5170 1999 ---- St. Louis encephalitis - USA (Texas): alert 19990710.1158 St. Louis encephalitis - USA (New York City) 19990905.1556 [these were in fact the first cases of WNV detected in the USA] 1997 ---- St. Louis Encephalitis, alert - USA (Florida) 19970802.1608] ....mpp/jw
 
 
 
 
Patricia A. Doyle, PhD Emerging Diseases message board: http://www.clickitnews.com/emergingdiseases/index.shtml Zhan le Devlesa tai sastimasa Go with God and in Good Health





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