International Journal of Epidemiology, Vol 26, 1392-1400, Copyright © 1997 by International Epidemiological Association
MS Chan, M Bradley and DA Bundy
BACKGROUND: This paper presents a suite of models of hookworm transmission
dynamics which vary the mixing patterns and rates of contamination and
infection between children and adults. In this context mixing refers to the
degree of epidemiological communication between children and adults, for
example, whether adults are likely to get infected from infective material
passed by children. METHODS: Three models are described which represent
random mixing, no mixing and restricted mixing respectively. Child, adult
and population targeted chemotherapy programmes are examined and compared
between these models. Data from a hookworm control programme in Zimbabwe
were analysed with respect to their fit to the various models. RESULTS: The
analysis suggests that some mixing does occur and that in this study
location, the sites where adults deposit faeces are more likely to lead to
subsequent contamination than the sites children use. CONCLUSIONS: Mixing
patterns may have a profound effect on transmission dynamics and should be
considered in relation to design of control programmes.
ARTICLES
Transmission patterns and the epidemiology of hookworm infection
Wellcome Trust Centre for the Epidemiology of Infectious Disease, Department of Zoology, Oxford, UK.
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