Tuesday, October 30, 2007

Malaria moves in behind the loggers

Guardian: …In Peru, malaria was almost eradicated 40 years ago, but this year 64,000 cases have been registered in the country, half in the Amazon region. It is thought there are many more unregistered cases deep within the massive and humid rainforest, where health authorities find it almost impossible to gain access.

"Malaria is present. There have been 32,000 cases this year in this area alone - that says malaria is very much present," said Hugo Rodríguez, a doctor at the Andean Health Organisation, which is fighting malaria in border areas of Peru, Ecuador, Colombia and Venezuela.

His organisation distributes mosquito nets to some villagers, spreading the message through the area that the illness is dangerous and - where they can identify the cases - helping in post-infection treatment. "Now we are not talking about eradicating malaria any more, as that is impossible and unsustainable; we are doing our best to try and control it," he added.

Climate change and deforestation are behind the return of malaria in the Peruvian Amazon. Off-season rain is altering the pattern of mosquito development, leaving puddles containing the lethal larvae in areas where malaria had been nonexistent. "The actual malaria problem of the Peruvian Amazon is caused by constant climate changes," said biologist Carlos Pacheco, head of the mosquito control unit in Iquitos, the regional capital south of Mazán.

And deforestation is having a similar effect, forcing the mosquito to move to new areas and spreading the disease to places where people are not aware of the disease, where villagers lack the means to get hold of mosquito nets and preventive medicines, and where health authorities have no presence.

…Two scientific reports last year linked malaria with deforestation. Peruvian researchers found that frontier areas cleared of trees for logging, settlements, roads, farming or mining were far more likely to harbour malaria-carrying mosquitoes. In one Peruvian study, researchers said the biting rate of mosquitoes in deforested areas was nearly 300 times greater than in virgin forests. Increases in human population density had no impact on biting rates….

No comments: