A fever is her bodies way of fighting off the infection and a fever under 102 in a toddler doesn't even need to be treated - forcing it lower with motrin or tylenol actually makes it harder for your daughter to get well.
Remember that penicillin has been around for 70+ years. Lots of the bugs it can kill now laugh at it. It also will do nothing for viruses. It's possible the bug your daughter has is slightly resistant, it's possible she has a new viral infection.
As long as she is playing well, acting fairly normal & happy, is eating & drinking well, don't worry about such a low fever. Give her the antibiotics just as prescribed, for as LONG as prescribed, even if she seems to be 100% better. If she starts acting sick again or the fever goes above 101.5, call your doctor for a new evaluation.
at 3:35 PM on Oct. 3, 2008