Thanks to Diane Bodofsky I found the Zithromax dosage, and since no one else seemed to have one I thought I would post it. First of all, where it came from- several years ago I had a ferret with a Mycobacterium avian infection which is VERY unusual, to make a long story as short as possible, I was put in touch with a Dr.Maslowe who is at Veteran's Hospital in BOston. He is an MD infectious disease specialist, but also assists with these diseases in animals. For example, he had recently helped a zoo that had an elephant with a Mycobacterium infection. Anyway, he put Rhett on a combination of three antibiotics (he lived for another 9 months), one of which was Zithromax. The dosage was 10 mg/kl once a day. The once a day dosage, and tiny amount that need to be given made this an easy drug to admininster. It is a 3rd (4th?)gneration cephalasporin. Hope this helps somebody!No I am NOT a vet, so talk to yours. [Posted in FML issue 3071]