I had recurrent mastitis for a while last year. The first time, I did have a
nipple crack. The worst (and last) time, I was treated with Rocephin IM by
the physician's assistant at the clinic where I recieve care.  She is also
nursing a baby the age of mine.  I finally tracked down the cause--I slept
on my side, and would roll over the breast, which I guess was enough reduce
drainage, even if the baby nursed that side at night.  Repositioning and the
last round of antibiotics seems to have fixed it, since that was October.
Cathy Lester, LVN, WIC Lady, and no longer mastitis sufferer