What could it mean that my removed iud (after 7mths) was found to have group b strep? likely contamination or could i have an infection in my uterus?

This is probably not: contamination, but could be colonization or an actual infection. Some people have Group B strep in their uterus and genital tract, without it causing an infection (colonization). This is most important when pregnant, because this bacteria can pass onto the baby, who can become very ill. Please discuss this with your doctor further.

IUD & Streptococcus: Streptococcus Group B can usually be found normally in the vagina. It can migrate up the IUD string and produce a Fallopian tube infection. If your MD has examined you and found that there isn't either a intra-uterine or tubal infection, then that is great. The IUD could have been contaminated at the time of tis' removal through the vagina if you don't have any evidence of infection.