stomatitis

There is a yellow tinge on the corners of his mouth and possibly minor swelling, freaking out, is this mouth rot aka stomatitis?!?! http://imgur.com/SWmAws1 http://imgur.com/ozKNtv9

Can you help me? My 2 year-old veiled male was diagnosed very early stage stomatitis and treated with baytril. This didn’t help and we took a sample from his mouth. Lab test result was Pseudomonas aeruginosa, a very tricky one to get rid of. Now his mouth has been washed with gentamicin solution...