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Shot noise processes for clumped parasite infections with time-dependent decay dynamics


Heinzmann, D; Barbour, A D; Torgerson, P R (2011). Shot noise processes for clumped parasite infections with time-dependent decay dynamics. Biostatistics, Bioinformatics and Biomathematics, 2(2):83-201.

Abstract

Shot noise processes are introduced to model aggregated parasitic count data arising from clumped superinfections coupled with different decay mechanisms of the ingested parasite clumps. The corresponding likelihood functions are derived by using Laplace transforms. The models are fitted to samples with Echinococcus granulosus parasites in dogs from Kazakhstan, Tunisia and China. It is shown that parameter estimates take plausible values and that the decay dynamics is comparable in the three samples. The results indicate that dogs cease to be infectious after about 8 months, and that infections of dogs occur at a low rate, but the ingested parasite load per clump is in the thousands.

Shot noise processes are introduced to model aggregated parasitic count data arising from clumped superinfections coupled with different decay mechanisms of the ingested parasite clumps. The corresponding likelihood functions are derived by using Laplace transforms. The models are fitted to samples with Echinococcus granulosus parasites in dogs from Kazakhstan, Tunisia and China. It is shown that parameter estimates take plausible values and that the decay dynamics is comparable in the three samples. The results indicate that dogs cease to be infectious after about 8 months, and that infections of dogs occur at a low rate, but the ingested parasite load per clump is in the thousands.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Mathematics
05 Vetsuisse Faculty > Chair in Veterinary Epidemiology
Dewey Decimal Classification:570 Life sciences; biology
610 Medicine & health
510 Mathematics
Language:English
Date:2011
Deposited On:18 Oct 2011 10:49
Last Modified:05 Apr 2016 15:02
Publisher:Mili Publications
ISSN:0976-1594
Funders:Schweizerischer National Fonds
Related URLs:http://www.mililink.com/issue_content.php?id=42&iId=64 (Publisher)
Permanent URL: http://doi.org/10.5167/uzh-49922

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