1. An ELISA for the early diagnosis of acute canine babesiosis detecting circulating antigen of large Babesia spp
- Author
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Saša Štefanić, Torsten J Naucke, Peter Deplazes, Mindaugas Šarkūnas, Gintaras Zamokas, Felix Grimm, Ramon M. Eichenberger, University of Zurich, and Eichenberger, Ramon M
- Subjects
10078 Institute of Parasitology ,0301 basic medicine ,medicine.drug_class ,3400 General Veterinary ,030231 tropical medicine ,2405 Parasitology ,Babesia ,610 Medicine & health ,Antigens, Protozoan ,Enzyme-Linked Immunosorbent Assay ,Biology ,Monoclonal antibody ,Sensitivity and Specificity ,Epitope ,03 medical and health sciences ,Dogs ,0302 clinical medicine ,Antigen ,600 Technology ,medicine ,Animals ,Parasite hosting ,Dog Diseases ,Rapid diagnostic test ,General Veterinary ,Antibodies, Monoclonal ,General Medicine ,030108 mycology & parasitology ,biology.organism_classification ,Virology ,Canis ,Immunology ,Babesia canis ,570 Life sciences ,biology ,Parasitology - Abstract
Babesia canis is the predominant Babesia species in dogs in Europe and is responsible for a severe and fatal disease. An increase in global pet tourism and a widening of the geographic distribution of the tick vector has led to the emergence of infections in areas where previously only imported cases have been reported. Due to the potential for rapid and serious disease progression, direct parasite detection by stained blood smears and light microscopy or DNA-based methods have traditionally been used for the diagnosis of acute infections. This study describes the production of a murine monoclonal antibody ('mAb BcFIII 7/1/2') that reacts to a 65kDa corpuscular epitope present in B. canis-infected erythrocytes and can be used in an ELISA to detect circulating Babesia antigen during acute infections. The sensitivity of the ELISA was 100% (95%CI: 84.5-100) as determined using blood lysate samples from 27 dogs with acute B. canis infections. Sensitivity was reduced to 53.8% in 13 patent Babesia vogeli infections (95%CI: 26.1-79.6) based on the current test design using convalescent serum from a B. canis-infected dog. The specificity was determined to be 86.4% (95%CI: 64-96.4) using 22 samples from healthy canine blood donors. In the course of acute B. canis infections, the ELISA showed a positive result at the same time as a positive PCR result was recorded. This was 24-48h before parasites could be detected by light microscopy. Convalescent samples collected from 6 B. canis-infected dogs at least 14days post treatment resulted in negative ELISA reactions. The hyper-acute to acute phase of a B. canis infection represents an emergency situation with high mortality. To increase the chances of survival, a fast and accurate diagnosis and immediate treatment is required. The current study demonstrates the opportunity of an early and specific detection of acute infections by an AgELISA that is potentially translatable to a rapid diagnostic test design.
- Published
- 2017
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