[Thiabendazole for the control of Strongyloides stercoralis infection in a hyperendemic area in Peru]. / Tiabendazol para el control de la infección por Strongyloides stercoralis en una zona hiperendémica en el Perú.

Strongyloides stercoralis infection is a disease caused by an intestinal parasite. This helminth is highly prevalent in tropical and subtropical areas. The preferred treatment is ivermectin, and thiabendazole as a second option available in certain Peruvian institutions. The purpose of the study was to assess the efficacy and tolerability of thiabendazole (25 mg/kg/day) administered twice a day (after meals) for three days in individuals with S. stercoralis chronic infection. The study was conducted at Hospital de La Merced, Province of Chanchamayo, Peru (endemic area), during a 90 day period. The study included 32 individuals (22 female and 10 male, average age +/- SD = 9.31 +/- 8.11 years) with a diagnosed S. stercoralis infection. Follow up tests were eosinophil count, hematocrit, agar plate feces culture, and Baermann technique modified by Lumbreras. Healing rate was 90.6%. The average eosinophil count in healed patients significantly decreased (1168 to 665 eosinophils/cc, p=0.006) as compared to the treatment failure group, which showed a slight increase (618 to 897 eosinophils/cc, p=0.125). Hematocrit increased in both groups (2% and 3%, respectively). Adverse effects were headache, dizziness, and epigastralgia in 6.2% of individuals. It was concluded that the studied scheme showed a high effectiveness rate and was well tolerated. Therefore this scheme may be taken into account for control programs of this parasite in hyperendemic areas.

Tiabendazol para el control de la infección por Strongyloides stercoralis en una zona hiperendémica en el Perú / Tiabendazole for the control of the infection by Strongyloides stercoralis infection in a hyperendemic area in Peru

La estrongiloidiosis es una enfermedad parasitaria intestinal causada por S. stercoralis, un nemátode geohelmíntico altamente prevalente en zonas tropicales y subtropicales. El tratamiento de elección actual es ivermectina, y como segunda alternativa el tiabendazol disponible en algunas instituciones de salud en el Perú. Nuestro objetivo fue evaluar la eficacia y tolerabilidad de tiabendazol (25 mg/kg/día) repartido dos veces al día después de las comidas por 3 días, en individuos con infección crónica por S. stercoralis. El estudio fue llevado a cabo en el Hospital de La Merced, provincia de Chanchamayo, Perú (zona endémica); en un periodo de 90 días. El estudio incluyó a 32 individuos (22 mujeres - 10 hombres; media de edad más menos DS = 9.34 más menos 8.11 años) con diagnóstico parasitológico de S. stercoralis. Los exámenes de seguimiento fueron recuentos de eosinófilos, hematocrito, cultivo de heces en placas de agar nutritivo y Método de Baermann en Copa (técnica modificada por Lumbreras). La tasa de curación fue de 90.6 por ciento. La media de eosinófilos en los pacientes curados disminuyó significativamente (1168 a 665 eosinófilos/cc, p=0.006) en comparación con el grupo de pacientes que fracasaron al tratamiento cuya media de eosinófilos tuvo un ligero aumento (61 a 897 eosinófilos/cc, p=0.125). En ambos grupos, el hematocrito aumentó entre 2 por ciento y 3 por ciento. Los efectos adversos fueron cefalea, mareos y epigastralgia en el 6.2 por ciento de los pacientes. Concluimos que el esquema evaluado tiene una alta tasa de efectividad y fue bien tolerado, y podría ser tomado en cuenta en programas de control para zonas hiperendémicas de este parásito.

Strongyloides stercoralis infection is a disease caused by an intestinal parasite. This helminth is highly prevalent in tropical and subtropical areas. The preferred treatment is ivermectin, and tiabendazole as a second option available in certain Peruvian institutions. The purpose of the study was to assess the efficacy and tolerability of tiabendazole (25 mg/kg/day) administered twice a day (after meals) for three days in individuals with S. stercoralis chronic infection. The study was conducted at Hospital de La Merced, Province of Chanchamayo, Peru (endemic area), during a 90 day period. The study included 32 individuals (22 female and 10 male, average age ± SD = 9.31 ± 8.11 years) with a diagnosed S. stercoralis infection. Follow up tests were eosinophil count, hematocrit, agar plate feces culture, and Baermann technique modified by Lumbreras. Healing rate was 90.6 per cent. The average eosinophil count in healed patients significantly decreased (1168 to 665 eosinophils/cc, p=0.006) as compared to the treatment failure group, which showed a slight increase (618 to 897 eosinophils/cc, p=0.125). Hematocrit increased in both groups (2% and 3%, respectively). Adverse effects were headache, dizziness, andepigastralgia in 6.2 per cent of individuals. It was concluded that the studied scheme showed a high effectiveness rate and was well tolerated. Therefore this scheme maybe taken into account for control programs of this parasite in hyperendemic areas.