Hi April,
I work in microbiology and know a little about septicemia. Your mom must have had blood cultures drawn that are growing bacteria – ie. she has a bacterial infection that is in her bloodstream. If her leg is swollen and warm it’s possible that the infection originated there. They probably are also doing cultures on her leg, and it will probably show the same bacteria. If they don’t know what bacteria is growing yet they probably have her on a broad-spectrum antiobiotic and will monitor her fever. The organism identification and sensitivity results should be available within 24 hours of the cultures going ‘positive’ so the doctor’s will know if the antibiotic is fully effective.
I hope your mom feels better soon April! Jody