You need to get an exact weight of the snake so you can get the correct amount of medication. I have never treated a larger python (only Ball Python) so I am not familiar with the amount of baytril per weight of snake but I am sure some one here will know.

I live in Los Angeles and they only time I have had RI's was from low humidity and warm dry air. I reccomend you get your humidity up around 60% and temps on the higher side (94 farenheit).