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Seroprevalence of Toxocara infection in children and environmental contamination of urban areas in Paraná State, Brazil

Published online by Cambridge University Press:  25 November 2011

S. Mattia ,
C.M. Colli ,
C.M. Adami ,
G.F. Guilherme ,
L. Nishi ,
G. Rubinsky-Elefant ,
A.A. Marchioro ,
M.L. Gomes  and
A.L. Falavigna-Guilherme
S. Mattia
Affiliation:
Laboratory of Environmental Parasitology, State University of Maringá, Maringá87020-900, Brazil
C.M. Colli
Affiliation:
Laboratory of Environmental Parasitology, State University of Maringá, Maringá87020-900, Brazil
C.M. Adami
Affiliation:
Laboratory of Environmental Parasitology, State University of Maringá, Maringá87020-900, Brazil
G.F. Guilherme
Affiliation:
Laboratory of Environmental Parasitology, State University of Maringá, Maringá87020-900, Brazil
L. Nishi
Affiliation:
Laboratory of Environmental Parasitology, State University of Maringá, Maringá87020-900, Brazil
G. Rubinsky-Elefant
Affiliation:
Laboratory of Environmental Parasitology, State University of Maringá, Maringá87020-900, Brazil
A.A. Marchioro*
Affiliation:
Laboratory of Environmental Parasitology, State University of Maringá, Maringá87020-900, Brazil
M.L. Gomes
Affiliation:
Laboratory of Environmental Parasitology, State University of Maringá, Maringá87020-900, Brazil
A.L. Falavigna-Guilherme
Affiliation:
Laboratory of Environmental Parasitology, State University of Maringá, Maringá87020-900, Brazil
*
* E-mail: ariella_86@hotmail.com
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Abstract

The objectives of this study were to evaluate the contamination by eggs of Toxocara in sandy areas or grass lawns of outdoor recreation areas that are used by children, and the frequency of seroprevalence in children, from three cities of fewer than 45,000 inhabitants in Paraná, Brazil. From May 2005 to December 2007, five samples were taken from each of 13 sandy sites and 18 grass lawns, all from plazas and public schools. Blood samples from children aged 0–12 years were analysed by immunoassay for anti-Toxocara IgG. The soil samples were processed by floatation and sedimentation. Eggs of Toxocara spp. were present in 44.7% (38/85) of the samples from grassed areas and in 21.4% (15/70) of the sand samples. The lawns were 2.16 times more contaminated than the sand (P = 0.0009). However, the epidemiological variables showed no statistically significant difference between seropositive (36.8%; 130/353), and seronegative children. The rate of seropositivity was higher in children aged 0–5 years (P = 0.03), who were 1.94 times more likely to develop persistent wheezing (P = 0.02).

Type
Research Papers
Information
Journal of Helminthology , Volume 86 , Issue 4 , December 2012 , pp. 440 - 445
Copyright
Copyright © Cambridge University Press 2011

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