Bovine trypanosome species prevalence and farmers’ trypanosomiasis control methods in south-western Uganda

Authors

  • Richard A Alingu National Livestock Resources Research Institute
  • Dennis Muhanguzi Makerere University
  • Ewan MacLeod University of Edinburgh
  • Charles Waiswa Makerere University
  • Jenna Fyfe University of Edinburgh

Abstract

A cross-sectional study was conducted in Mbarara district, south-western Uganda in May 2012 to determine the burden of African animal trypanosomosis (AAT) in the semi-intensive dairy production systems where pyrethroid acaricides are frequently used in the control of tick-borne diseases (TBDs). A total of 295 cattle blood samples were taken and analysed using a single pair of primers previously designed to amplify internal transcribed spacer (ITS1) of trypanosome ribosomal deoxyribonucleic acid (rDNA). A structured questionnaire was administered to 55 participating livestock farmers to generate data on acaricide and trypanocidal drug usage. The overall prevalence of trypanosome species was 2.4% (95% CI; 1.0% – 4.8%); Trypanosoma vivax was the most predominant species (2.0%; 95% CI; 0.7% – 4.4%). A single mixed infection of T. vivax and Trypanosoma brucei s.l. was detected. All the participating farmers used acaricides for tsetse and TBD control; 89.1% of the acaricides used were pyrethroids. About half of the farmers used trypanocidal drugs, mainly diminazene formulations (Berenil®). Low prevalence of trypanosomes in examined samples is most likely related to the frequent use of pyrethroid insecticides, trypanocides and restricted grazing (paddocking and tethering). These rigorous management practices are geared towards optimising production of exotic dairy breeds kept in this region that are highly susceptible to TBDs and AAT.

Author Biographies

  • Richard A Alingu, National Livestock Resources Research Institute

    National Livestock Resources Research Institute, Uganda

  • Dennis Muhanguzi, Makerere University

    College of Veterinary Medicine Animal Resources and Biosecurity, Makerere University, Uganda

  • Ewan MacLeod, University of Edinburgh

    Division of Pathway Medicine & Centre for Infectious Diseases, University of Edinburgh, United Kingdom

  • Charles Waiswa, Makerere University

    College of Veterinary Medicine Animal Resources and Biosecurity, Makerere University, Uganda

  • Jenna Fyfe, University of Edinburgh

    Division of Pathway Medicine & Centre for Infectious Diseases, University of Edinburgh, United Kingdom

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Published

2021-12-09

Issue

Section

Original Research