Análise da ocorrência de parasitos com potencial zoonótico no solo de escolas municipais infantis em dois municípios do Rio Grande do Sul / Analysis of the occurrence of parasites with zoonotic potential in the soil of municipal nursery schools in two municipalities in Rio Grande do Sul state

Introdução: A contaminação de praças ou ambientes de recreação por ovos de geohelmintos constitui um problema de saúde pública. O solo, com relação aos helmintos parasitas se comporta como um hospedeiro intermediário. Recebe fezes ou água contaminada por parasitas em estágios não infectantes, oferecendo-lhes condições para o desenvolvimento e protege os parasitas em estágios infectantes durante certo tempo para, posteriormente, transmiti-lo ao homem. O objetivo é verificar a ocorrência e a contaminação ambiental por parasitas com potencial zoonótico no solo de escolas infantis em dois municípios do Rio Grande do Sul. Métodos: Trata-se de um estudo delineamento transversal, observacional e descritivo. A coleta foi através de amostras de areia em dez escolas de dois municípios, as coletas do material foram de cinco pontos diferentes, tanto da profundidade quanto da superfície, totalizando-se 100 amostras analisadas. As amostras de areia foram processadas em laboratório através dos métodos de Rugai e Hoffman, Pons e Janer. Resultados: Análise total (N=100) dos dois municípios, totalizando 50 amostras de cada. A contaminação das areias, por ovos de Ancylostoma spp., foi de 54% (n=27) no município I, sendo encontrados 56% (n=28) na cidade II. Conclusão: A ocorrência de ovos de Ancylostoma spp. no ambiente de recreação enfatiza a importância da adoção de medidas restritivas rígidas que impeçam a entrada de animais, como cães e gatos em locais de lazer. Além desses parasitas serem capazes de comprometer a saúde de humanos e infectar outros animais. (AU)

Introduction: Contamination of squares or recreational environments with geohelminth eggs is a public health problem. The soil serves as an intermediate host to helminths. It receives feces or water contaminated with parasites in non-infective stages, providing them with conditions for development, and protects parasites in infective stages for some time and then transmits them to humans. The aim was to investigate the occurrence of environmental contamination with parasites with zoonotic potential in the soil of nursery schools in two municipalities of Rio Grande do Sul state. Methods: A cross-sectional, observational and descriptive study was conducted. Soil samples were collected at ten schools in two municipalities, from five different school sites in terms of both depth and surface. Soil samples were processed at a laboratory using the methods of Rugai and Hoffman, Pons and Janer. Results: In total, 100 samples from the two municipalities were analyzed, 50 samples each. Soil contamination with Ancylostoma spp. eggs was 54% (n=27) in city I and 56% (n=28) in city II. Conclusions: The occurrence of Ancylostoma spp. eggs in recreational environments shows the importance of adopting strict restrictive measures to prevent animals, such as dogs and cats, from entering leisure areas. Also, these parasites may compromise human health and infect other animals. (AU)

Ancilostomíase / Ancylostomiasis

A ancilostomíase é uma doença parasitária causada pelos helmintos Ancylostoma duodenale e Necator americanus, com importante.

Evaluation of the role of ancylostoma caninum in human as a cause of acute and recurrent abdominal pain

Ninety-five patients with obscure acute or recurrent abdominal pain and ten asymptomatic healthy parasite free cases were subjected to thorough history taking, clinical examination, sonography, routine laboratory investigations and sero-testing by IgG ELISA to detect antibodies to excretory/secretory [ES] antigens of adult A. caninum and by IgG and IgG4 Western blot [WB] to detect antibodies to Ac68 antigen. Eleven male patients [5 with acute abdomen, 3 diagnosed as appendicitis and 3 had recurrent mild to moderate abdominal pain] fulfilled the criteria of case definition of human enteric infection with A. Caninum [GI]. The study also detected human hookworm infection in 14 patients [G.IIb], other parasites in 34 patients [GIIc] and 36 patients had no parasite [G.IIa]. Although 3 patients from group I were diagnosed as appendicitis and were dealt with surgically, the pain recurred and mebendazole only ameliorated the patients complaints. The obtained appendices of these operated cases showed marked eosinophilic infiltration, but no adult canine hookworms were detected. IgG ELISA was positive in 72.7%, 8.3%, 100%, 23.5% and 0% in groups and control, respectively

Diarreia persistente por Strongyloides stercoralis e ancilostomideos

O achado de nematelmintos como agentes de diarreia persistente e raro. Os autores relatam o caso de uma crianca que desenvolveu diarreia persistente na presenca destes agentes e de varias outras condicoes que propiciam a doenca. Discutem os fatores de risco, a fisiopatologia e o manejo clinico, enfatizando a terapeutica nutricional

Prevalence of intestinal parasitic infections among primary school children in Aswan governorate, Egypt

Five villages in Aswan governorate, Egypt were chosen for a study of prevalence of intestinal parasitic infections namely El Hakroub, El Sheikh Haroon, Kima, Sohail and Abou Handal. Stools of 500 primary school children living in such villages were examined by direct smear for helminthic and Protozoal infections. The study revealed that Ascaris Lumbriociodes was the most prevalent [8.2%] followed by. Oxyris Vermicularis [3.8%] then Hymenolepis name [3.4%] next Strongyloides Strcoralis Ancylostoma duodenale and Trichuris Trichura with infection rate of 1.2% for each. As regards intestinal protozoa, the infection rates of Entamoeba Histolytica and Giardia Lamblia were 7.6% and 7.2% respectively