Diagnosis of soil-transmitted helminthiasis in an Amazonic community of Peru using multiple diagnostic techniques

Machicado, Jorge D.; Marcos, Luis A.; Tello, Raúl; Canales, Marco; Terashima, Angélica; Gotuzzo, Eduardo

doi:10.1016/j.trstmh.2012.03.004

Cited by 55 publications

(66 citation statements)

References 22 publications

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“…In the present study, around 24 (4.43%) of 542 individuals from six indigenous villages were positive for S. stercoralis larvae (Figure 1) which is roughly similar to results reported in other studies in indigenous communities in Brazil, for instance in Parakanã Indians (5.6%) from State of Pará, in Maxakali Indians, from State of Minas Gerais (5.4%), in members of the ethnic group Terena from State of Mato Grosso do Sul (3.8 %) and in Suruí Indians (0.5 %) [8,10,11,12]. Our results are also in agreement with studies performed in other regions worldwide [13,14]. The rate of infestation, in the present study, could be related to a number of factors such as poor hygiene, inadequate sanitation, water intake that was neither filtered nor chlorinated, low education, low socioeconomic status [15,16,17,18].…”

Section: Resultssupporting

confidence: 93%

<i>Strongyloides stercoralis </i>Infestation in Indigenous Tapirapé Ethnic Group from Mato Grosso State, Brazil

Malheiros¹,

Mathews²,

L.M.S³

et al. 2014

AJEID

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Strongyloides stercoralis is an intestinal helminth, which infects millions of people worldwide. In the present study, 542 individuals from six indigenous villages were enrolled of whom 24 (4.43 %) were positive for S. stercoralis based on analysis by microscopy of fecal concentrates. S. stercoralis was more prevalent in males (5.32 %, 14/263) than females (3.58 %, 10/279), though without a significant statistic difference (P = 0.66). Likewise, the infection by S. stercoralis could not be related to age of the indigenous (P > 0.05). This study is the first report of the prevalence of S. stercoralis in members of the indigenous Tapirapé ethnic group from the Brazilian Amazon. The results suggest a contamination by infective forms of S. stercoralis in the environment where these indigenous live.

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Section: Resultssupporting

confidence: 93%

<i>Strongyloides stercoralis </i>Infestation in Indigenous Tapirapé Ethnic Group from Mato Grosso State, Brazil

Malheiros¹,

Mathews²,

L.M.S³

et al. 2014

AJEID

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“…Other groups have also demonstrated a lower prevalence of soil-transmitted helminths compared with H. nana in Peru. 10 Similarly, a study by Tefera and others in eastern Ethiopia showed that while the prevalence of STHs was less than 0.5%, the prevalence of H. nana was 13% in elementary school children receiving regular deworming treatment. 11 Hymenolepis nana has been associated with diarrhea and other gastrointestinal symptoms among children.…”

Section: Discussionmentioning

confidence: 94%

Hymenolepis nana Impact Among Children in the Highlands of Cusco, Peru: An Emerging Neglected Parasite Infection

Cabada¹,

Morales

López

et al. 2016

The American Society of Tropical Medicine and Hygiene

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Abstract. Hymenolepis nana is the most common cestode infection in the world. However, limited information is available regarding its impact on affected populations. We studied the epidemiology and symptoms associated with hymenolepiasis among children 3-16 years old in 16 rural communities of the highlands of the Cusco region in Peru. Information on demographics, socioeconomic status, symptoms as reported by parents, and parasitological testing was obtained from the database of an ongoing Fasciola hepatica epidemiologic study. A total of 1,230 children were included in the study. Forty-five percent were infected with at least one pathogenic intestinal parasite. Giardia spp. (22.9%) was the most common, followed by Hymenolepis (17.4%), Fasciola (14.1%), Ascaris lumbricoides (6.1%), and Strongyloides stercoralis (2%). The prevalence of Hymenolepis infection varied by community, by other parasitic infections, and by socioeconomic status. However, only years of education of the mother, use of well water, and age less than 10 years were associated with Hymenolepis infection in the multivariate analysis. Hymenolepis nana infection was associated with diarrhea, jaundice, headaches, fever, and fatigue. Children with > 500 eggs/g of stool were more likely to have symptoms of weight loss, jaundice, diarrhea, and fever. Hymenolepis nana infection and age were the only factors retained in the multivariate analysis modeling diarrhea. Hymenolepiasis is a common gastrointestinal helminth in the Cusco region and is associated with significant morbidity in children in rural communities. The impact caused by the emergence of Hymenolepis as a prevalent intestinal parasite deserves closer scrutiny.

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“…Machicado, et al (24), compararon la técnica de sedimentación espontánea en tubo de centrífuga con la Kato-Katz de la OMS y encontraron que ambas tenían la misma tasa de detección de huevos de geohelmintos, pero la primera tuvo un conteo de huevos más alto y, al mismo tiempo, se pueden observar los protozoarios intestinales, a diferencia de la Kato-Katz de la OMS.…”

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Evaluación de tres pruebas para el diagnóstico de geohelmintos en Colombia

et al. 2012

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Contribución de los autores:Todos los autores participaron en la concepción, diseño del trabajo, análisis e interpretación de resultados, redacción del manuscrito y su aprobación final.NOTA TÉCNICA Biomédica 2013;33:128-36 doi: http://dx.doi.org/10.7705/biomedica.v33i1.633 Evaluación de tres pruebas para el diagnóstico de geohelmintos en Colombia Introducción. Las geohelmintiasis son un problema de salud pública en países en vía de desarrollo. Los estudios de diagnóstico a nivel individual, así como los estudios de población, deben incorporar evaluaciones de su validez y fiabilidad. Objetivo. Comparar el examen directo, el método de Ritchie-Frick modificado, el de Kato-Katz brasilero y el de Kato-Katz de la OMS, para el diagnóstico de geohelmintos. Materiales y métodos. Se llevó a cabo un estudio de fiabilidad de pruebas diagnósticas. La misma muestra de materia fecal fue analizada por el mismo observador, empleando cuatro pruebas. Se recolectaron 204 muestras, de las cuales se analizaron 194 que cumplían los criterios de inclusión. Los observadores no conocían la identidad de los participantes, ni el resultado en las otras pruebas. Para el análisis se tomó como método de referencia, la prueba de Kato-Katz de la OMS. Para evaluar la fiabilidad se emplearon el porcentaje de concordancia, el porcentaje de concordancia positiva, la prueba estadística kappa y el coeficiente de correlación intraclase. Resultados. Se encontró un buen desempeño de la prueba brasilera de Kato-Katz, con alta sensibilidad y especificidad para Trichuris trichiura y Uncinaria sp., 0,97 y 0,96 respectivamente, en ambos valores, y alta especificidad y moderada sensibilidad para Ascaris lumbricoides (0,95 y 0,79), y un desempeño entre moderado y pobre para la prueba de Ritchie-Frick y el examen directo. Las diferencias fueron mayores para Uncinaria sp. y T. trichiura, que para A. lumbricoides. Conclusión. La prueba brasilera de Kato-Katz podría ser implementada, pero se necesitan más estudios para considerar la relación de su capacidad operativa con su factibilidad, disponibilidad y costo.Palabras clave: helmintiasis/diagnóstico, salud pública, Colombia doi: http://dx.doi.org/10.7705/biomedica.v33i1.633 Evaluation (assessment) of three tests for diagnosis of geohelmints in ColombiaIntroduction. Soil-transmitted helminth infections are considered a public health problem in developing countries. The diagnostic tests, both for individual parient diagnosis as for population studies should be evaluated in terms of validity and reliability. Objective. To compare the direct examination, the modified Ritchie-Frick method, a Kato-Katz designed by a Brazilian group and one designed by the WHO, for the diagnosis of soil-transmitted helminthes. Materials and methods. A diagnostic test reliability study was performed. The same stool sample was analyzed by the same observer using four diagnostic tests. 204 samples were obtained, 194 of those fulfilled the inclusion criteria and were analyzed. The observers did not know the participants' identity neither...

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Diagnosis of soil-transmitted helminthiasis in an Amazonic community of Peru using multiple diagnostic techniques

Cited by 55 publications

References 22 publications

<i>Strongyloides stercoralis </i>Infestation in Indigenous Tapirapé Ethnic Group from Mato Grosso State, Brazil

<i>Strongyloides stercoralis </i>Infestation in Indigenous Tapirapé Ethnic Group from Mato Grosso State, Brazil

Hymenolepis nana Impact Among Children in the Highlands of Cusco, Peru: An Emerging Neglected Parasite Infection

Evaluación de tres pruebas para el diagnóstico de geohelmintos en Colombia

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