Application of crude and recombinant ELISAs and immunochromatographic test for serodiagnosis of animal trypanosomosis in the Umkhanyakude district of KwaZulu-Natal province, South Africa

J Vet Med Sci. 2015 Feb;77(2):217-20. doi: 10.1292/jvms.14-0330. Epub 2014 Oct 22.

Abstract

A total of 231 serum samples were collected from sheep (n=9), goats (n=99) and cattle (n=123) in northeastern KwaZulu-Natal, South Africa. Trypanosome infection was detected using Trypanosoma brucei brucei crude antigen (TbbCA) and T. congolense crude antigen (TcoCA) ELISA assays. Recombinant antigen (T. evansi GM6 which consisted of 4 repeat domains, TeGM6-4r) ELISA and immunochromatographic test (ICT) were also used. Crude antigen ELISA, TeGM6-4r-ELISA and ICT detected 27.3%, 29% and 19.9% of trypanosome seropositive samples, respectively. Trypanosome infection prevalence in cattle and goats was 35.8-46.3% and 0-9.1%, respectively. Out of 9 sheep serum samples, 2-4 sera (22.2-44.4%) were positive. The detection performance of crude and recombinant antigen ELISAs was relatively similar (K=0.6-0.7); both are recommended for reference diagnosis and large scale epidemiological surveys. There is potential application for ICT in on-site diagnosis, but its sensitivity should be improved.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antigens, Protozoan / blood
  • Cattle
  • Cattle Diseases / blood
  • Cattle Diseases / diagnosis
  • Cattle Diseases / epidemiology
  • Cattle Diseases / parasitology
  • Chromatography, Affinity / veterinary*
  • Enzyme-Linked Immunosorbent Assay / methods
  • Enzyme-Linked Immunosorbent Assay / veterinary*
  • Goat Diseases / blood
  • Goat Diseases / diagnosis
  • Goat Diseases / epidemiology
  • Goat Diseases / parasitology
  • Goats
  • Serologic Tests / methods
  • Serologic Tests / veterinary*
  • Sheep
  • Sheep Diseases / blood
  • Sheep Diseases / diagnosis
  • Sheep Diseases / epidemiology
  • Sheep Diseases / parasitology
  • South Africa / epidemiology
  • Trypanosoma / classification*
  • Trypanosomiasis, African / blood
  • Trypanosomiasis, African / diagnosis
  • Trypanosomiasis, African / epidemiology
  • Trypanosomiasis, African / veterinary*

Substances

  • Antigens, Protozoan