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Argentina: Yellow fever re-emerges in triple border area

Shiloh

Editor, Senior Moderator
Source: http://www.mercopress.com/vernoticia.do?id=15695&formato=HTML

Yellow fever re-emerges in triple border area

Dead monkeys have been found in the jungle of northeast Argentina, next to Brazil and Paraguay, probably caused by yellow fever, according to local sanitary authorities. The discovery follows the confirmed yellow fever deaths of two jungle workers in the neighbouring province of Misiones.

However Corrientes province sanitary officials were quick to point out that ?there?s no risk of another yellow fever epidemic?, since 95% of the exposed population and at risk have been immunized? against yellow fever.


The sixth dead monkey was found this weekend in the Garruchos jungle area neighbouring to the north with Misiones, where other infected monkeys had been detected as well as the two human deaths.

?The animal was too highly decomposed so we were not able to take samples for testing?, said Marcelo Jim?nez, head of the Sanitary Zone, who together with special teams are visiting the different jungle areas and villages to check health conditions and vaccinate the local population.

?We?re visiting home by home in Garruchos, San Carlos and Colonia Liebig areas, where last week five dead monkeys were found, but they were also too decomposed for samples?, said Jimenez.

Anyhow Argentine sanitary authorities are considering the monkeys as ?positive? given their high vulnerability to yellow fever.

Adolfo Schneider, head of the Public Health Department of Corrientes said that last December ?200.000 people had been inoculated against yellow fever in Corrientes, and the percentage of population not vaccinated so far in the border areas is minimum?.

According to Argentine federal authorities, 90% of the Corrientes province population has been vaccinated, ?but our goal is 100% inoculation?.

Hugo Fernandez head of the Epidemics Prevention and Risks department said that the outbreak could potentially expand to other north-eastern Argentine provinces ?or even further?, but ?we are working on dead and live monkeys in the border area with Paraguay and Brazil?.

Fernandez revealed that 90% of the population of the provinces of Misiones, Corrientes and Formosa, neighbouring with Paraguay and Brazil, have been inoculated, ?but we need to add other provinces for risk prevention?.


Yellow fever is caused by a small virus that is spread by the bite of mosquitoes and is common in South America. Anyone can get yellow fever, but the elderly have a higher risk of severe infection. If a person is bitten by an infected mosquito, symptoms usually develop 3 to 6 days later.

First symptoms are headache, muscle aches, fever, loss of appetite, vomiting, and jaundice. After approximately 3 to 4 days, victims often experience brief remission.

After a few days (3 to 4) fever and other symptoms go away. Most individuals will recover at this stage, but others may move onto the third, most dangerous stage (intoxication stage) within 24 hours. This includes multi-organ dysfunction, liver and kidney failure, bleeding disorders/haemorrhage, brain dysfunction including delirium, seizures, coma, shock and death.

In Argentina last year ten people contracted the disease and two official deaths were reported. Between the end of 2007 and beginning of 2008, eight people died of the disease in Paraguay and in Brazil, 19.
 
Re: Argentina: Yellow fever re-emerges in triple border area

Source: http://www.bloomberg.com/apps/news?pid=20601086&sid=aKbfIEUciQ9M&refer=latin_america

Argentina's Deadly Yellow Fever Outbreak Spurs Mass Vaccination
By Jason Gale

Jan. 6 (Bloomberg) -- Argentina is mass-vaccinating people against yellow fever amid concern its first deadly outbreak of the disease in 42 years may spread from jungle areas to cities.

The mosquito-borne virus killed a farm worker last week in a rural area of Misiones province, which borders Paraguay and Brazil, nine months after a tobacco worker died in the same area, the country's first confirmed yellow fever fatality since 1966.

At least 2.5 million Argentineans risk exposure to the virus, said Misiones Governor Maurice Fabi?n Closs in a statement on the provincial health authority's Web site.


Government efforts to fight the disease ``will be relentless,'' Closs said, adding that those who have resisted vaccination show an ``alarming lack of awareness'' of the dangers of yellow fever. Misiones has ordered 1.2 million shots to immunize all residents and those traveling to the province.

The Ministry of Health of the Nation is offering free vaccination at sites across the country to protect people against a disease the World Health Organization says can cause fatal bleeding and spark ``devastating outbreaks.''

The Argentine cases add to a wave of infections in humans and monkeys in Brazil, Paraguay and Peru during the past 18 months, most of which were caused by infected mosquitoes circulating in jungle areas. In June, two deaths were confirmed in Sao Paulo, Brazil's economic center, the country's Center for Epidemiological Surveillance said.

Yellow Fever has reemerged as a public health threat during the past two decades, spurred by the spread of the Aedes mosquito capable of transmitting the viral disease, a reduction in vaccination rates, and increased global travel and urbanization, according to the WHO.

Fatal Hemorrhage

There is no specific treatment for the disease, which can cause fever, muscle ache and nausea. About one in seven sufferers develop severe complications, including hemorrhage and kidney failure, from which only half survive, the Geneva-based WHO said.

Yellow fever circulates mostly among monkeys in jungle, or sylvan, areas. It can cause outbreaks in humans when a person infected in the jungle travels to an urban area and is bitten by an Aedes egypti mosquito, which subsequently transmits the virus to other susceptible people whose blood it feeds on.

``There is always concern about a possible spill-over of the sylvan cycle of yellow fever virus transmission into the urban cycle involving Ae. egypti, as occurred last year in neighboring Paraguay,'' the International Society for Infectious Diseases said yesterday in an e-mail via its ProMED-mail program.
 
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