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Journal of Veterinary Diagnostic Investigation Vol. 19 Issue 4, 362-367
Copyright © 2007 by the American Association of Veterinary Laboratory Diagnosticians
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Full Scientific Reports

Comparative evaluation of Rose Bengal plate agglutination test, mallein test, and some conventional serological tests for diagnosis of equine glanders

Abeera Naureen1, Muhammad Saqib, Ghulan Muhammad, Muhammad H. Hussain and Muhammad N. Asi

Correspondence: 1Corresponding Author: Abeera Naureen, Department of Clinical Medicine and Surgery, University of Agriculture, Faisalabad, 38040 Pakistan. drabeeran{at}yahoo.com

The Rose Bengal plate agglutination test (RBT) was evaluated for the diagnosis of equine glanders, and its diagnostic efficiency was compared with that of mallein and other serological tests, including indirect hemagglutination test (IHAT), complement fixation test (CFT), and modified counter immunoelectrophoresis test (mCIET). Sera from 70 naturally infected culture-positive, 96 potentially exposed cohorts, and 110 healthy equines were tested. All tests but mCIET showed 100% specificity when testing the sera from glanders-negative equines. The calculated sensitivities of RBT, IHAT, CFT, mCIET, and mallein test when testing culture-positive equines were 90.0, 97.1, 91.4, 81.4, and 75.7%, respectively. The RBT was significantly (P < 0.05) more sensitive than the mallein test and mCIET. The positive and negative predictive values of each test (RBT, IHAT, CFT, mallein test, and mCIET) were as follows: 100 and 94, 100 and 98.2, 100 and 96.7, 100 and 86.6, and 90.5 and 88.6, respectively. On comparing glandered and nonglandered animals, the highest agreement (0.987) was found between RBT and CFT followed by RBT and IHAT (0.940), RBT and mallein test (0.871), and RBT and mCIET (0.852). Because the RBT is simpler and rapid to perform, the inclusion of the test as a supplementary test for the diagnosis of glanders in field conditions is recommended.

Key Words: Burkholderia mallei • glanders • mallein • Rose Bengal plate agglutination test • serological tests






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