Multiattribute evaluation of two simple tests for the detection of Cryptosporidium parvum in calf faeces |
| |
| Authors: | Trotz-Williams Lise A Martin S Wayne Martin Donald Duffield Todd Leslie Kenneth E Nydam Daryl V Jamieson Frances Peregrine Andrew S |
| |
| Institution: | Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, Ont., Canada. ltrotzwi@uoguelph.ca |
| |
| Abstract: | There is a need for simple and inexpensive diagnostic and screening tests for the detection of Cryptosporidium parvum infection in calves. A sucrose wet mount test and a lateral immunochromatography test were evaluated for epidemiological sensitivity and specificity, cost per test, simplicity, test time and ease of batching. Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) of the Cryptosporidium oocyst wall protein (COWP) gene locus, with gel electrophoresis, was used as a gold standard. Cohen's kappa statistic of agreement (kappa) between the Ontario Veterinary College (OVC) sucrose wet mount test and COWP PCR-RFLP was 0.82, and the sensitivity and specificity of the OVC sucrose wet mount test were 88.6% and 93.8%, respectively. The sensitivity and specificity of the lateral immunochromatography test were 78.3% and 93.3%, respectively, and agreement between this test and PCR-RFLP was good (kappa=0.73). There was substantial agreement between the OVC sucrose wet mount test and the lateral immunochromatography test (kappa=0.84). Both tests were inexpensive and easy to use; however, the lateral immunochromatography test was faster and simpler to perform than the sucrose wet mount test, and was generally more user-friendly. These tests provide practitioners and researchers with cheap, quick and accurate methods of detecting C. parvum infection in young calves. |
| |
| Keywords: | |
| 本文献已被 PubMed 等数据库收录！ |
|
