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Heavy schistosomiasis associated with poor short-term memory and slower reaction times in Tanzanian schoolchildren.

Jukes, M. C. and Nokes, C. A. and Alcock, Katherine Jane and Lambo, J. K. and Kihamia, C. and Ngorosho, N. and Mbise, A. and Lorri, W. and Yona, E. and Mwanri, L. and Baddeley, A. D. and Hall, A. and Bundy, D. A. (2002) Heavy schistosomiasis associated with poor short-term memory and slower reaction times in Tanzanian schoolchildren. Tropical Medicine and International Health, 7 (2). pp. 104-117. ISSN 1360-2276

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    Abstract

    Cross-sectional studies of the relationship between helminth infection and cognitive function can be informative in ways that treatment studies cannot. However, interpretation of results of many previous studies has been complicated by the failure to control for many potentially confounding variables. We gave Tanzanian schoolchildren aged 9-14 a battery of 11 cognitive and three educational tests and assessed their level of helminth infection. We also took measurements of an extensive range of potentially confounding or mediating factors such as socioeconomic and educational factors, anthropometric and other biomedical measures. A total of 272 children were moderately or heavily infected with Schistosoma haematobium, hookworm or both helminth species and 117 were uninfected with either species. Multiple regression analyses, controlling for all confounding and mediating variables, revealed that children with a heavy S. haematobium infection had significantly lower scores than uninfected children on two tests of verbal short-term memory and two reaction time tasks. In one of these tests the effect was greatest for children with poor nutritional status. There was no association between infection and educational achievement, nor between moderate infection with either species of helminth and performance on the cognitive tests. We conclude that children with heavy worm burdens and poor nutritional status are most likely to suffer cognitive impairment, and the domains of verbal short- term memory and speed of information processing are those most likely to be affected

    Item Type: Article
    Journal or Publication Title: Tropical Medicine and International Health
    Additional Information: UI - 21831323 LA - eng PT - Journal Article DA - 20020213 IS - 1360-2276 SB - IM CY - England RefMgr field[1]: Journal RefMgr field[8]: In File
    Uncontrolled Keywords: Adolescence Aged Animal child Children Cognition Cognition Disorders complications Cross-Sectional Studies Disease Educational achievement Educational Status England epidemiology Feces Female Helminth infection Hookworm Infections Human isolation & purification Male Memory Memory ; Short-Term Nutritional status Parasite Egg Count parasitology performance physiopathology Psychomotor Performance Reaction Time Schistosoma haematobium Schistosomiasis haematobia Short Term Memory Support ; Non-U.S.Gov't Tanzania Tests Treatment Urine
    Subjects: B Philosophy. Psychology. Religion > BF Psychology
    Departments: Faculty of Science and Technology > Psychology
    Faculty of Arts & Social Sciences > Lancaster Institute for the Contemporary Arts
    ID Code: 26424
    Deposited By: Dr Katherine Alcock
    Deposited On: 19 May 2009 16:56
    Refereed?: Yes
    Published?: Published
    Last Modified: 26 Jul 2012 16:32
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/26424

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