Skip to main content

On estimating the basic reproduction number for Schistosoma haematobium

Buy Article:

The full text article is temporarily unavailable.

We apologise for the inconvenience. Please try again later.

Existing estimates of the basic reproduction number, R0, for human schistosomes are mostly in the range 1-4, implying that schistosomes should be relatively easy to eliminate from endemic areas, which is contrary to practical experience. An estimate of R0 for a site in Zimbabwe is obtained here using a mathematical model explicitly incorporating two features believed to be epidemiologically significant; age-dependent exposure and acquired immunity. Parameter estimates are, as far as possible, obtained independently, but the coefficients representing man-snail and snail-man transmission, as well as parameters representing effects of acquired immunity, must be estimated indirectly by fitting the model to field data. Heterogeneity in human exposure and contamination is crudely incorporated by considering `wormy' and non-wormy' fractions of the population. The results suggest R0 to be in the range 4-5 or more, higher than previous estimates and despite only moderate levels of infection at this site. It is shown that this estimate is sensitive to the form of the underlying model. The application of less realistic models may lead to less reliable estimates of R0.
No References
No Citations
No Supplementary Data
No Article Media
No Metrics

Keywords: Zimbabwe; control; helminth; mathematical model; schistosomiasis

Document Type: Research Article

Affiliations: 1: Department of Zoology, University of Oxford, UK 2: Abteilung fur Mathematische Biologie, Technische Universitat Wien, Austria 3: Blair Research Laboratory, Harare, Zimbabwe

Publication date: 1996-08-01

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more