Table 1. A contested hybrid bobcat DNA was positive for feline CCR5 (feCCR5), but negative for enFeLV-LTR, indicating the animal was not a domestic cat hybrid.
PCR results indicate Ct values in parentheses.
| Samples/Controls | feCCR5 (Ct) | enFeLV-LTR (Ct) | Comment |
|---|---|---|---|
| Dog | - | - | Negative control for feCCR5 and enFeLV-LTR |
| Lynx rufus | + (25.9 – 27.2) | - | Samples from verified L. rufus from biorepository (Lee, Malmberg et al. 2017). Positive control for feCCR5, negative control for enFeLV-LTR |
| Bengal cat | + (25.5) | + (20.7) | Domestic cat-leopard cat hybrid acting as a positive for feCCR5 and enFeLV-LTR (Powers, Chiu et al. 2018). |
| Domestic cat | + (26.4) | + (22.0) | Positive control for feCCR5 and enFeLV-LTR |
| ‘hybrid’ bobcat -knot wash | + (35.1) | - | Consistent with feline DNA but domestic cat enFeLV-LTR undetected |
| ‘hybrid’ bobcat -rope wash | + (32.9) | - | Consistent with feline DNA but domestic cat enFeLV-LTR undetected |