I know for a fact fentanyl does not show up on a traditional 5 panel test you have to get a VERY EXPENSIVE and SPECIAL test (called chromography or some shit) . I know for a fact because I was on house arrest and got tested every week and would get high off it the morning before id even go and nothing would show up.
Disinfecting Textiles. Disinfect clothing, bedding, toys, small rugs and other fabric items that might have been contaminated by running them through the longest wash cycle available on your washing machine. Use warm water and add about 3/4 cup bleach about 5 minutes after you start the load. Consider using a steam cleaner instead of a bleach solution on carpets, large rugs, sofas and other fabric furniture. Parvo loses effectiveness after about 30 days in indoor spaces.
Clorox is the only thing that will kill the Parvo virus on floors and shoes. Take a bottle of Clorox spray and a towel with you to the Vet Office. Spray the bottom of your shoes with the Clorox spray. You can also take an extra pair of shoes with you.