Abstract:
INTRODUCTION:El Salvador is regarded as a highly endemic country for Chagas disease, as evidenced by the relatively high estimated positive serology rate for Trypanosoma cruzi among blood donors. This study aimed to identify the factors contributing to this high rate by analyzing changes in T. cruzi seroprevalence. METHODOLOGY:Secondary data were collected from 31 blood banks operated by the Ministry of Health, the Red Cross, the Institute of Salvadoran Social Security, and the Military Hospital. The data were analyzed to determine the number of cases of T. cruzi seropositivity, and the average prevalence of seropositivity by province. Simple linear regression was performed to identify trends in T. cruzi seropositivity. RESULTS:Analysis of the 885,187 blood samples collected between 2001 and 2011 revealed 21,693 cases of transfusion-related infections, with a significant reduction of T. cruzi seropositivity from 3.7% in 2001 to 1.7% in 2011, reflecting a 54% decrease over the course of a decade (R(2) = 89.6%, p > 0.001). T. cruzi seroprevalence decreased in San Salvador, Santa Ana, Sonsonate, and Cuscatlán. In contrast, seroprevalence remained high with no decrease in Ahuachapán and San Vicente, and consistently low in the remainder of the country. CONCLUSIONS:Although the national prevalence of T. cruzi among blood donors has decreased, it remains high in the provinces of Ahuachapán and San Vicente. Strengthening vector control activities and developing an approach for the systematic follow-up of prospective blood donors with positive serology for T. cruzi are required, especially in areas with high seropositivity.
journal_name
J Infect Dev Ctriesjournal_title
Journal of infection in developing countriesauthors
Sasagawa E,Guevara de Aguilar AV,Hernández de Ramírez MA,Romero Chévez JE,Nakagawa J,Cedillos RA,Misago C,Kita Kdoi
10.3855/jidc.4035subject
Has Abstractpub_date
2014-08-13 00:00:00pages
1029-36issue
8eissn
2036-6590issn
1972-2680journal_volume
8pub_type
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journal_title:Journal of infection in developing countries
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