Study on Chagas disease occurrence in the municipality of Monte Negro, State of Rondônia, Brazilian Amazon

Revista da Sociedade Brasileira de Medicina Tropical

Elaine Oliveira Costa De Carvalho²  João Aristeu Da Rosa¹  Anderson Antonio De Carvalho¹  Hialli Cristine Oliveira Chaves¹  Everton Almeida De Souza¹  Alejandro Luquetti Ostermayer¹  Luís Marcelo Aranha De Camargo¹ 

[1] ,Fundação Universidade Federal de Rondônia Departamento de Biologia Porto Velho RO

关键词: Chagas disease;    Amazon;    Trypanosoma cruzi;    Triatomines;    Doença de Chagas;    Amazônia;    Trypanosoma cruzi;    Triatomíneos;   

DOI  :  10.1590/S0037-86822011000600010

来源: SciELO

【 摘 要 】

INTRODUCTION: Studies on Chagas disease deal with the perspective of its occurrence in the Amazon region, which is directly correlated to the population growth and the spread of the bug biotope. The state of Rondônia has an immense source of vectors (Triatomine) and reservoirs of Trypanosoma cruzi. Environmental changes brought forth by the deforestation in the region may cause vector behavior changes and bring these vectors to a closer contact with humans, increasing the probability of vector infection. METHODS: This study was carried out to check the occurrence of Chagas disease in the municipality of Monte Negro, Rondônia, Brazil, based on a random sampling of the farms and people wherein blood collection from the population and capturing triatomines were done. The blood samples were submitted to serologic tests to detect antibodies of the IgG class against T. cruzi. The triatomines that were collected had their digestive tract checked for the presence of trypanosomatidae with morphology resembling that of the T. cruzi. RESULTS: The population examined was mostly from other states. From the 322 bugs examined on the microscope, 50% showed parasites with morphology compatible with T. cruzi. From the serology of 344 random samples of human blood, 1.2% was found positive, 6% showed inconclusive results, and 92.8% were negative. CONCLUSIONS: Monte Negro shows low prevalence of human infection by T. cruzi and none active vector transmission; however, preventive and surveying measures, which are not performed until now, shall be taken due to the abundance of vectors infected by trypanosomatidae.

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