Journal
INTERNATIONAL JOURNAL FOR PARASITOLOGY
Volume 39, Issue 10, Pages 1115-1123Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijpara.2009.02.013
Keywords
Trypanosoma evansi; Cost benefit; Control strategies; Targeted treatment; Infectious disease model; Philippines
Categories
Funding
- Australian Biosecurity Co-operative Research Centre for Emerging Infectious Diseases [1.025RE]
- Australian Centre for International Agricultural Research (ACIAR) [AH/2000/009]
- International Foundation of Science (IFS)
- Murdoch University, Australia
Ask authors/readers for more resources
Simple demographic and infectious disease models of buffaloes and other domestic hosts for animal trypanosomosis (surra) caused by Trypanosoma evansi were developed. The animal models contained deterministic and stochastic elements and were linked to simulate the benefit of control regimes for surra in village domestic animal populations in Mindanao, Philippines. The impact of the disease on host fertility and mortality were key factors in determining the economic losses and net-benefit from the control regimes. If using a high (99%) efficacy drug in surra-moderate to high risk areas, then treating all animals twice each year yielded low prevalence in 2 years; targeted treatment of clinically sick animals, constantly monitored (monthly), required 75% fewer treatments but took longer to reach a low prevalence than treating all animals twice each year. At high drug efficacy both of these treatment strategies increased the benefit over untreated animals by 81%. If drug efficacy declined then the benefit obtained from twice yearly treatment of all animals declined rapidly compared with regular monitoring and targeting treatment to clinically sick animals. The current control regimen applied in the Philippines of annual sero-testing for surra and only treating sero-positive animals provided the lowest net-benefit of all the control options simulated and would not be regarded as effective control. The total net-benefit from effective surra control for a typical village in a moderate/high risk area was 7.9 million pesos per annum (US $158,000). The value added to buffaloes, cattle, horses, goats/sheep and pigs as a result of this control was US $88, $84, $151, $7, $114 per animal/year, respectively. (C) 2009 Australian Society for Parasitology Inc. Published by Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available