I´m thinking of moving north. Here´s a bit from Lonely Planet.
Read more: http://www.lonelyplanet.com/bolivia/the-amazon-basin/trinidad/practical-information/health#ixzz1ow9igL1h
Although mud is the biggest problem for pedestrians, the open sewers will make anyone nauseous – except perhaps the 3m boa constrictors sometimes seen swimming in them! Take special care at night.
Yeah, what do they know....