The tylosin (which I am assuming is tylan 200) is more specific to killing gram positive bacteria. Most of snake infections are caused by gram negative bacteria. Baytril can take care of both, but It is harsh and can lead to scaring. I personally like ceftazidime (fotaz) it always worked for me anytime I have had problems. I have heard of combining the two baytril and ceftazidime. The trick is to catch it early then it's going to be much easier on you and the snake. I like knowing about the tylan 200, I have never heard of it.
This is the website I use whenever I have a problem in combination with the advise of my vet, who's a bird vet.
http://www.anapsid.org/resources/rxdose.html
