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

• DOI: 10.1292/jvms.14-0330
• Publication Date: 2014-10-21T23:12:32Z
• Authors: Thu-Thuy NGUYEN; Mono Sophie MOTSIRI; Moeti Oriel TAIOE; Moses Sibusiso MT...; Yasuyuki GOTO; Shin-Ichiro KAWAZU; Oriel Matlhahane ...; Noboru INOUE
• Keywords: Trypanosoma; Goat Diseases; Sheep; Goats; Cattle Diseases; Sheep Diseases; Antigens, Protozoan; Enzyme-Linked Immunosorbent Assay; 04 agricultural and veterinary sciences; Chromatography, Affinity; 3. Good health; 0403 veterinary science; South Africa; Trypanosomiasis, African; Animals; Parasitology; Cattle; Serologic Tests

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.