Rabies vaccination targets for stray dog populations

Leung, T and Davis, S 2017, 'Rabies vaccination targets for stray dog populations', Frontiers in Veterinary Science, vol. 4, pp. 1-10.


Document type: Journal Article
Collection: Journal Articles

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Title Rabies vaccination targets for stray dog populations
Author(s) Leung, T
Davis, S
Year 2017
Journal name Frontiers in Veterinary Science
Volume number 4
Start page 1
End page 10
Total pages 10
Publisher Frontiers Research Foundation
Abstract The role of stray dogs in the persistence of domestic dog rabies, and whether removal of such dogs is beneficial, remains contentious issues for control programs seeking to eliminate rabies. While a community might reach the WHO vaccination target of 70% for dogs that can be handled, the stray or neighborhood dogs that are too wary of humans to be held are a more problematic population to vaccinate. Here, we present a method to estimate vaccination targets for stray dogs when the dog population is made up of stray, free-roaming, and confined dogs, where the latter two types are considered to have an identifiable owner. The control effort required for stray dogs is determined by the type-reproduction number, T1, the number of stray dogs infected by one rabid stray dog either directly or via any chain of infection involving owned dogs. Like the basic reproduction number R0for single host populations, T1determines the vaccination effort required to control the spread of disease when control is targeted at one host type, and there is a mix of host types. The application of T1to rabies in mixed populations of stray and owned dogs is novel. We show that the outcome is sensitive to the vaccination coverage in the owned dog population, such that if vaccination rates of owned dogs were too low then no control effort targeting stray dogs is able to control or eliminate rabies. The required vaccination level also depends on the composition of the dog population, where a high proportion of either stray or free-roaming dogs implies unrealistically high vaccination levels are required to prevent rabies. We find that the required control effort is less sensitive to continuous culling that increases the death rate of stray dogs than to changes in the carrying capacity of the stray dog population.
Subject Biological Mathematics
Epidemiology
Keyword(s) Canine rabies
Dog rabies
Infectious disease modeling
Mathematical model
Zoonosis
DOI - identifier 10.3389/fvets.2017.00052
Copyright notice Copyright © 2017 Leung and Davis. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribuTION or reproduction in other forums is permitted, provided the original author(s)
ISSN 2297-1769
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