New features of the endemic diseases in urban centers

Abstract

The unordered invasion of natural hosts, the lack of control of biological vectors of infectious illnesses, the changes in the interaction-host-parasite in imunodepression condition and the alterations of the infectious agents are some of the factors related to the emergency of some infectum-parasitic illnesses, between which the affection, the infection for hantavírus, leishmaniose, the tuberculosis, the infection for Trypanosoma cruzi. The migration of great population contigentes of the mal area for the metropolises led to the endemization of some typically illnesses of agricultura1 environments as the Illness of Chagas. It is estimated that about 60% of 5 000 000 Brazilians infected for Trypanosoma cruzi lives in urban centers mainly São Paulo, Rio de
Janeiro and Belo Horizonte. The consequences of the urbanization of the endemic disease and the control of the main vector of the illness in Brazil, Triatoma infestans, the transmission for transfusion of blood and blood derivateds acquired great importance as mechanism of perpetuation of the disease in the country.