A man rests on a hammock on the banks of the Ypacarai Lake, declared not suitable for bathing, in Ypacarai, Paraguay on October 18, 2012. Paraguay’s Health Minister Antonio Corbo said that water samples from the lake analized in Sao Paulo, Brazil with the backing of the Pan American Health Organization determined that the bacteria found in the lake’s waterweed present a high level of neurologic and liver toxicity. AFP PHOTO / NORBERTO DUARTE (Photo credit should read NORBERTO DUARTE/AFP/Getty Images)