Skip to main content

Table 1 Samples with discordant testing results prior to heat treatment (and results following heat treatment) for the three testing platforms

From: Comparative evaluation of commercially available point-of-care heartworm antigen tests using well-characterized canine plasma samples

Samplea HW Categoryb Witness® HW SNAP® RT DiroChek® Sample OD
(+ control OD) Initial Test
Sample OD
(+ control OD)
Post-Heat Treatment
1 BL + (+) − (vol.b) + (+) 0.038 (0.352) 0.049 (0.309)
23 BL + (+) − (+) + (+) 0.013 (0.363) 0.070 (0.309)
26 BL − (−) − (−) + (−) 0.015 (0.363) 0.000 (0.309)
52 BL + (+) − (+) + (+) 0.027 (0.470) 0.124 (0.309)
62 BL + (+) − (+) + (+) 0.020 (0.470) 0.077 (0.309)
68 BL − (+) − (+) + (+) 0.019 (0.380) 0.050 (0.309)
92 Neg. + (−) − (−) − (−) 0.000 (0.380) 0.000 (0.309)
98 BL + (+) − (+) − (+) 0.004 (0.380) 0.025 (0.309)
116 BL − (−) + (−) − (−) 0.001 (0.337) 0.000 (0.309)
121 BL + (+) − (vol.c) − (+) 0.009 (0.337) 0.126 (0.309)
  1. Sample OD values (DiroChek®) prior to and following heat treatment are included
  2. aSample number indicates the order in which samples were tested
  3. b BL borderline
  4. cInsufficient volume (<150 μL) precluded testing on all testing platforms