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Published on: November 3, 2009
[How innocent is Toxocara?]
Insights
Toxocara infection in children may be linked to asthma and bronchitis. This study found a higher prevalence of these respiratory conditions in children with Toxocara antibodies, suggesting a potential causal relationship.
Area of Science:
- Epidemiology
- Immunology
- Pediatrics
Context:
- Investigated 234 children aged 3-6 years in The Hague, Netherlands.
- Assessed seropositivity for Toxocara antibodies.
- Excluded cross-reactions with Ascaris antibodies.
Purpose:
- To determine the prevalence of Toxocara antibodies in young children.
- To explore the potential association between Toxocara infection and respiratory conditions like asthma and bronchitis.
Summary:
- 11.1% of children (26 out of 234) were seropositive for Toxocara.
- Seropositive children showed a significantly higher incidence of asthma or bronchitis (31%) compared to seronegative children (12%).
Impact:
- Findings suggest a potential link between toxocariasis and childhood asthma/bronchitis.
- Further research could confirm toxocariasis as a preventable cause of these respiratory illnesses.
Abstract:
We have investigated 234 children (3-6 years of age) in The Hague, The Netherlands, for the presence of antibodies against Toxocara. Of these children 26 (11.1%) were seropositive to Toxocara. Cross-reactions with antibodies against Ascaris could be excluded. Of the seropositive children 31% had asthma or bronchitis, while this percentage was only 12% for the seronegative children. This might indicate that toxocariasis causes asthma or bronchitis in some children. If further investigations corroborate this hypothesis, one has to conclude that preventing human toxocariasis contributed to prevent a number of cases of asthma and bronchitis.
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