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Understanding the relationship between prevalence of microfilariae and antigenaemia using a model of lymphatic filariasis infection

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Irvine, Michael Alastair, Njenga, Sammy M., Gunawardena, Shamini, Njeri Wamae, Claire, Cano, Jorge, Brooker, Simon J. and Hollingsworth, T. Déirdre (2016) Understanding the relationship between prevalence of microfilariae and antigenaemia using a model of lymphatic filariasis infection. Transactions of the Royal Society of Tropical Medicine and Hygiene, 110 (2). pp. 118-124. doi:10.1093/trstmh/trv096 ISSN 0035-9203.

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Official URL: http://dx.doi.org/10.1093/trstmh/trv096

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Abstract

Background: Lymphatic filariasis is a debilitating neglected tropical disease that affects impoverished communities. Rapid diagnostic tests of antigenaemia are a practical alternative to parasitological tests of microfilaraemia for mapping and surveillance. However the relationship between these two methods of measuring burden has previously been difficult to interpret.

Methods: A statistical model of the distribution of worm burden and microfilariae (mf) and resulting antigenaemic and mf prevalence was developed and fitted to surveys of two contrasting sentinel sites undergoing interventions. The fitted model was then used to explore the relationship in various pre- and post-intervention scenarios.

Results: The model had good quantitative agreement with the data and provided estimates of the reduction in mf output due to treatment. When extrapolating the results to a range of prevalences there was good qualitative agreement with published data.

Conclusions: The observed relationship between antigenamic and mf prevalence is a natural consequence of the relationship between prevalence and intensity of adult worms and mf production. The method described here allows the estimation of key epidemiological parameters and consequently gives insight into the efficacy of an intervention programme.

Item Type: Journal Article
Subjects: R Medicine > RC Internal medicine
Divisions: Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- )
Faculty of Science, Engineering and Medicine > Science > Mathematics
Library of Congress Subject Headings (LCSH): Lymphatics -- Diseases
Journal or Publication Title: Transactions of the Royal Society of Tropical Medicine and Hygiene
Publisher: Elsevier Ltd
ISSN: 0035-9203
Official Date: 2016
Dates:
DateEvent
2016Published
5 November 2015Accepted
18 August 2015Submitted
Volume: 110
Number: 2
Number of Pages: 7
Page Range: pp. 118-124
DOI: 10.1093/trstmh/trv096
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access (Creative Commons)
Date of first compliant deposit: 1 February 2016
Date of first compliant Open Access: 1 February 2016
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