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Open AccessArticle

Seroprevalence of the Strongyloides stercoralis Infection in Humans from Yungas Rainforest and Gran Chaco Region from Argentina and Bolivia

1
Instituto de Investigaciones de Enfermedades Tropicales (IIET-CONICET), Sede Regional Orán, Universidad Nacional de Salta, Orán 4530, Argentina
2
Cátedra de Química Biológica, Facultad de Ciencias Naturales, Universidad Nacional de Salta, Salta 4400, Argentina
3
Asociación para el desarrollo sanitario regional (ADESAR), San Antonio de Areco, Buenos Aires 2760, Argentina
4
Instituto de Patología Experimental, Facultad de Ciencias de la Salud (IPE-CONICET), Universidad Nacional de Salta, Salta 4400, Argentina
5
Hospital Muñiz, Buenos Aires, C1282AEN CABA, Argentina
6
Fundación Mundo Sano, Buenos Aires, C1061ABC CABA, Argentina
7
Instituto de Investigaciones en Energía no Convencional—Sector Salud y Ambiente (INENCO-CONICET), Universidad Nacional de Salta, Salta 4400, Argentina
*
Author to whom correspondence should be addressed.
Deceased in September 2016.
Pathogens 2020, 9(5), 394; https://doi.org/10.3390/pathogens9050394
Received: 21 April 2020 / Revised: 12 May 2020 / Accepted: 12 May 2020 / Published: 20 May 2020
(This article belongs to the Special Issue Prevalence of Strongyloidiasis and Schistosomiasis)
The threadworm, Strongyloides stercoralis, is endemic in tropical and subtropical areas. Data on the prevalence and distribution of infection with this parasite species is scarce in many critical regions. We conducted a seroprevalence study of S. stercoralis infection in 13 locations in the Gran Chaco and Yungas regions of Argentina and Bolivia during the period 2010–2016. A total of 2803 human serum samples were analyzed by ELISA-NIE which has a sensitivity of 75% and specificity of 95%. Results showed that 551 (19.6%) of those samples were positive. The adjusted prevalence was 20.9%, (95% confidence interval (CI) 19.4%–22.4%). The distribution of cases was similar between females and males with an increase of prevalence with age. The prevalence in the different locations ranged from 7.75% in Pampa del Indio to 44.55% in Santa Victoria Este in the triple border between Argentina, Bolivia, and Paraguay in the Chaco region. Our results show that S. stercoralis is highly prevalent in the Chaco and Yungas regions, which should prompt prospective surveys to confirm our findings and the design and deployment of control measures.
Keywords: Strongyloides stercoralis; seroprevalence, epidemiology; Argentina Strongyloides stercoralis; seroprevalence, epidemiology; Argentina
MDPI and ACS Style

Cimino, R.O.; Fleitas, P.; Fernández, M.; Echazú, A.; Juarez, M.; Floridia-Yapur, N.; Cajal, P.; Seijo, A.; Abril, M.; Weinberg, D.; Piorno, P.; Caro, N.; Vargas, P.; Gil, J.; Crudo, F.; Krolewiecki, A. Seroprevalence of the Strongyloides stercoralis Infection in Humans from Yungas Rainforest and Gran Chaco Region from Argentina and Bolivia. Pathogens 2020, 9, 394.

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