Strongyloides stercoralis and other enteroparasites in children at Uberlândia city, state of Minas Gerais, Brazil.

Departmento de Patologia, Universidade Federal de Uberlândia, MG, Brasil.
Memórias do Instituto Oswaldo Cruz (Impact Factor: 1.36). 01/1998; 93(2):161-4. DOI: 10.1590/S0074-02761998000200004
Source: PubMed

ABSTRACT To evaluate the rate of infection by Strongyloides stercoralis and other enteroparasites a survey was conducted in the city of Uberlândia, State of Minas Gerais, Brazil. A total of 900 stool samples from 300 children aging from four months to seven years, randomly selected in ten nursery schools from September 1994 to December 1995, were examined, both by the Baermann-Moraes and Lutz methods. Thirty nine children (13%) were found to be infected by S. stercoralis, 64.1% were boys and 35.9% were girls. Taking all the enteroparasites as a whole the results of the survey pointed out that 265 (88.4%0 of the 300 children were infected by the following: Giardia lamblia, 78.3%; Ascaris lumbricoides, 15.3%; S. stercoralis, 13%; Hymenolepis nana, 6.7%; hookworms, 6%; Enterobius vermicularis, 4%; Hymenolepis diminuta, 4% and Trichuris trichiura, 0.7%. From 265 infected children 64.5% were mono-infected, 27.2% were infected by two parasites and 8.3% had a poly-specific parasite burden. It was concluded that strongyloidiasis is hyperendemic in this area.

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    ABSTRACT: Strongyloidiasis is caused by the intestinal nematode Strongyloides stercoralis and it typically occurs in the asymptomatic form. However, it can cause hyperinfection and dissemination in immunosuppressed patients, especially if they are under corticoid therapy. Definitive diagnosis is made by the detection of larvae in fecal samples. However, as the number of parasites in the host is very low in most cases and the elimination of larvae in the feces is not frequent, the diagnosis of this disease by parasitological methods becomes extremely difficult. The development of reliable immunological assays is an important alternative approach for the diagnosis of strongyloidiasis. One of the major limitations in developing more sensitive and specific immunological tests is the difficulty in obtaining sufficient amounts of parasites to have well-defined fractions or molecules. Thus, the development of reliable serological assays for the strongyloidiasis diagnosis that does not need larvae as antigenic component is imperative.
    Revista de Patologia Tropical. 01/2006; 35(3):173-184.
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    ABSTRACT: RESUMO : Este estudo teve como objetivo diagnosticar a prevalência de parasitoses intestinais em escolares de quinta a oitava séries do Ensino Fundamental de uma escola pública do município de Medianeira, Estado do Paraná, para comparar os resultados obtidos com outros inquéritos realizados no Brasil e no Paraná. Foram realizados 88 exames coprológicos, cujo material fecal recolhido em frascos plásticos limpos e não estéreis, no mesmo dia da coleta, foi processado pelo método de Paratest. Contatou-se que 82,95% dos exames realizados não acusaram vestígios de patógenos intestinais e 17,05% foram positivos para a presença dos seguintes agentes etiológicos: Endolimax nana (33,33%), Entamoeba coli (46,67%) e Giárdia lamblia (13,33%), além de ovos do helminto Stronyloide stercorales (6,67%), com maior prevalência entre estudantes da quinta série (86,67%) do gênero feminino. Nas sexta e sétima séries registraram-se um caso em cada uma (6,67%) e na oitava série não houve nenhuma amostra positiva. Essa constatação pode ser um indicativo da eficiência da ação educativa que a instituição escolar desenvolve a cada ano. Conclui-se que os índices encontrados neste inquérito são semelhantes a outros estudos apontados na literatura e que a prevalência dessas parasitoses intestinais está associada às condições socioeconômicas do bairro. Por isso, recomendou-se a aplicação de novas medidas educativas, porque os infectados são portadores assintomáticos, e, por isso, importantes veículos transmissores, com participação fundamental no estabelecimento e manutenção do ciclo parasitológico que possa se estabelecer na comunidade investigada. Palavras-chave: Parasitoses Intestinais. Protozooses. Helmintíases. ABSTRACT : This study aimed to diagnose the prevalence of intestinal parasites in students from fifth to eighth grades of elementary school to a public school in the municipality of Medianeira, State of Parana, to compare the results with other surveys in Brazil and the Paraná. 88 stool tests were performed, whose fecal stuff collected in plastic bottles clean and not sterile, the same day the collection has been prosecuted by the method of Paratest. Contacted to be 82.95% of the tests have no traces of intestinal pathogens and 17.05% were positive for the presence of the following etiologic agents: Endolimax nana (33.33%), Entamoeba coli (46.67%) and Giardia lamblia (13.33%), in addition to the helminth eggs Stronyloide stercoralis (6.67%), with higher prevalence among students of the fifth series (86.67%) female. In the sixth and seventh grades recorded one case in each (6.67%) and eighth in the series there was no positive sample. This finding may be an indication of the efficiency of educational activity that the school develops every year. It was concluded that the rates found in this survey are similar to other studies found in the literature and that the prevalence of intestinal parasites is linked to socioeconomic conditions of the neighborhood. Therefore, recommended the application of new educational measures, because those infected are asymptomatic and thus important vehicles transmitters, with key participation in the establishment and maintenance of the parasite cycle that can be investigated in the community.
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    ABSTRACT: Strongyloides stercoralis, an intestinal parasitic nematode, infects more than 100 million people worldwide. Strongyloides are unique in their ability to exist as a free-living and autoinfective cycle. Strongyloidiasis can occur without any symptoms or as a potentially fatal hyperinfection or disseminated infection. The most common risk factors for these complications are immunosuppression caused by corticosteroids and infection with human T-lymphotropic virus or human immunodeficiency virus. Even though the diagnosis of strongyloidiasis is improved by advanced instrumentation techniques in isolated and complicated cases of hyperinfection or dissemination, efficient guidelines for screening the population in epidemiological surveys are lacking.
    PLoS neglected tropical diseases. 08/2014; 8(8):e3018.

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