Thanks to all who replied to my query.  The quick responses were very helpful
as I could not reach local colleagues who have copies of standard references.
 Thanks to all of you, I was able to give this mother accurate information
showing that bactrim is compatible with BF. You made her Christmas (and her
toddler's) a lot happier.  Hopefully she will be able to educate her doctor
so that future moms won't have this dilemma. Thanks again. Julia Griffith,
LLL in Toledo, Ohio