Interferon is indeed an immune system booster. Interferon has no effect on test results.
A dental is a good idea, oral health is very important, especially for immune-compromised cats. Your vet sounds like he's well-versed and yes, antibiotics before and after would be a good preventive measure. A CBC is a full blood panel, and yes, it gives good idea of basic health, and can show potential problems before they come to a head. It's a good idea if you can afford it. You can post the results here, and others will help you interpret the results. Phaewryn http://ucat.us/domesticcatlinks.html Special Needs Cat Resources
