title: Low seroprevalence of Trypanosoma cruzi infection and chronic chagasic cardiomyopathy in a region with abundance of triatomine vectors in Yucatan Peninsula of Mexico.
abstract: The Yucatan Peninsula of Mexico is endemic with Chagas disease. The main vector responsible for Trypanosoma cruzi transmission is Triatoma dimidiata which is abundant in domestic, peridomestic and sylvan cycles. The abundance of vectors favours T. cruzi transmission and is a high risk for developing chronic chagasic cardiomyopathy (CCC). In the past 10 years, little information was available on parasite seroprevalence and the prevalence of CCC in the Yucatan Peninsula. In the present work, we studied two Mayan communities with a high abundance of T. dimidiata and a random serial sample of 233 patients with an altered electrocardiogram or cardiac failure admitted to the Regional Hospital. A homemade enzyme-linked immunosorbent assay and indirect immunofluorescence standardized techniques were used to detect anti-T. cruzi IgG. In addition, Mayan volunteers were monitored by electrocardiography. In the Mayan communities, 4.8% (3/63) subjects were positive for T. cruzi antibodies none of them presented electrocardiographic alterations, however in seronegative subjects were detected right or left ventricle hypertrophy in 25% (16/63). A remarkable finding was that 90% of the Mayan population recognized the vector and 65% of them had experienced contact with triatomines bites. At the Regional Hospital 0.42% (1/233) were positive for T. cruzi antibodies showing compatible diagnosis with CCC; the most frequent pathology in this population was hypertension in 65% (151/233) and the less frequent was dilated myocardiopathy 6% (14/233). In conclusion, the prevalence of T. cruzi infection and CCC can be considered low in Yucatan, Mexico.
authors.affiliation: Centro de Investigaciones Biomédicas, Universidad Autónoma de Campeche, Av Patrico Trueba s/n, 24090 Campeche, Mexico.
authors.forename: Victor
authors.initials: V
authors.lastname: Monteón
authors.affiliation: Centro de Investigaciones Biomédicas, Universidad Autónoma de Campeche, Av Patrico Trueba s/n, 24090 Campeche, Mexico.
authors.forename: Rosa
authors.initials: R
authors.lastname: Solis-Oviedo
authors.affiliation: Centro de Investigaciones Biomédicas, Universidad Autónoma de Campeche, Av Patrico Trueba s/n, 24090 Campeche, Mexico.
authors.forename: Ruth
authors.initials: R
authors.lastname: Lopez
authors.affiliation: Centro de Investigaciones Biomédicas, Universidad Autónoma de Campeche, Av Patrico Trueba s/n, 24090 Campeche, Mexico.
authors.forename: Oscar
authors.initials: O
authors.lastname: Hernández
authors.affiliation: Hospital General de Especialidades "Dr Javier Buenfil Osorio", Secretaria de Salud, Av. Jose Lopez Portillo (Por Patricio Trueba de Regil), 24050 Campeche, Mexico.
authors.forename: Cesar Alducin
authors.initials: CA
authors.lastname: Tellez
mesh_terms: D000328:Adult; D000818:Animals; D000913:Antibodies, Protozoan / Q000097:blood; D002598:Chagas Cardiomyopathy / Q000453:epidemiology* / Q000469:parasitology* / Q000473:pathology; D002908:Chronic Disease; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood; D008297:Male; D008800:Mexico / Q000453:epidemiology; D008875:Middle Aged; D016036:Seroepidemiologic Studies; D014224:Triatoma / Q000469:parasitology*; D014349:Trypanosoma cruzi / Q000302:isolation & purification*; D055815:Young Adult
chemical_list: D000913:Antibodies, Protozoan; D007074:Immunoglobulin G