1989
DOI: 10.1590/s0036-46651989000200009 View full text |Buy / Rent full text
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Abstract: SUMMARYDue to the scarce information about the epidemiological features of schistoso¬ miasis in which the vector is Biomphalaria tenagophila, an investigation was carried in Pedro de Toledo in 1980 where such peculiarity is observed. Stool examinations (Kato Katz method) were performed in 4,741 individuals (22.8% positive to Schistosoma mansoni eggs) of this 583 had previously received chemoterapy and 4,158 remainders, untreated. The schistosomiasis prevalence in those two groups where respectively 31.7% and 2… Show more

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“…This region has been characterized as an area of low endemicity in the state of São Paulo (Dias et al 1989(Dias et al , 1992b. Approximately 15% of the individuals of both sexes, various age groups, residents in rural and urban areas of the municipality, exposed to the risk of infection by S. mansoni, were randomly selected during the second semester of 1998.…”
Section: Methodsmentioning
“…The 1980 survey involved stool examinations of approximately 4500 individuals and a prevalence index of 22.8%, with an infection intensity of 55.5 epg, was demonstrated by Kato-Katz method (Dias et al 1989). At the same time, prevalence indices of 55.5% and 51.8% were detected, respectively by immunofluorescence test for IgG antibodies (IgG-IFT) and intradermal reaction.…”
mentioning
“…Segundo esses autores, todos os portadores da endemia eram assintomáticos. Nessa área, o hospedeiro intermediário do trematódeo é a Biomphalaria tenagophila, com índices de infecção natural inferiores a 2% (Dias et al, 1989). Esses autores, em 1980, por meio de exames de fezes (método de KatoKatz) examinaram 4.741 indivíduos, havendo 22,8% com ovos de Schistosoma mansoni (três lâminas por indivíduo, da mesma amostra de fezes); entre eles, 583 tinham sido anteriormente tratados para esquistossomose, e os 4.158 restantes nunca foram medicados para a helmintose; as prevalências no dois grupos foram 31,7% e 21,6%, respectivamente.…”
Section: O Caso De Pedro De Toledounclassified
“…Observou-se que de acordo com os grupos etários, há boa correlação (r s = 0,745) entre intensidade de infecção e prevalência. Somente 0,4% de 1.137 moluscos coletados eliminavam cercárias de S. mansoni (Dias et al, 1989). Em estudo de campo, em 1987, no mesmo município , Marçal Jr. et al (1991) verificaram que cerca de 80% dos portadores apresentavam menos de 100 ovos por grama de fezes e apenas 9,0% eliminavam mais do que a metade do total de ovos.…”
Section: O Caso De Pedro De Toledounclassified
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