Trypanosoma cruzi vector infection rate is underestimated in some localities in the state of Bahia
Rev. patol. trop
;
45(1): 55-65, fev. 2016. tab, graf, ilus
Article
Dans Anglais
| LILACS
| ID: biblio-912777
ABSTRACT
Bahia was the last Brazilian state declared free of Chagas disease transmission by Triatoma infestans in 2006. The program designed to control vector transmission of Chagas is currently active, and all potential triatomines collected by the Bahia State Department of Health officials are most frequently diagnosed as negative for Trypanosoma cruzi when analyzed by the conventional parasitological direct method. The aim of the current study was to investigate whether triatomines from Bahia are free of T. cruzi infection using a more sensitive diagnostic methodology, namely the kinetoplastid-DNA polymerase chain reaction (kDNA-PCR). With the help of health officials, 51 triatomines were analyzed from peridomicile areas within the central north region of the state of Bahia. The majority (60.8%) were Triatoma brasiliensis, 29.4% were Triatoma pseudomaculata, and 9.8% were unidentified nymphs. Only one insect tested potentially positive for T. cruzi by the conventional parasitological direct method, and 31.4% were positive for T. cruzi DNA by kDNA-PCR. Almost half the infected insects (41.9%) were T. brasiliensis, a species with high potential for T. cruzi transmission. These results demonstrate that the number of infected triatomines with high transmission potential of T. cruzi may be greater than expected in four localities in the state of Bahia
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Maladie de Chagas
Pays comme sujet:
Amérique du Sud
/
Brésil
langue:
Anglais
Texte intégral:
Rev. patol. trop
Thème du journal:
Médecine tropicale
/
Pathologie
Année:
2016
Type:
Article
Pays d'affiliation:
Brésil
Institution/Pays d'affiliation:
Departamento de Patologia Básica, Universidade Federal do Paraná/BR
/
Programa de Pós-graduação em Microbiologia, Parasitologia e Patologia, Universidade Federal do Paraná/BR
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