Many strains have a hyaluronic acid capsule that is antiphagocytic. Group B Streptococci (Streptococcus agalactiae) are bacitracin resistant. Group D include Enterococci (Streptococcus faecalis) and Non-enterococci (Streptococcus bovis).
The first warning refers to the risk of fetal alcohol syndrome (FAS), the leading known cause of mental retardation in the United States. The good news is that this condition is 100 percent preventable as long as a woman does not drink alcohol while she is pregnant.
That is not the universal outcome for mental retardation, regardless of the cause. Not all retarded people are violent, nor are they overweight (although some genetic conditions do predispose people to it). There is a serious issue with caring for the severely retarded, but 'they' are not one unified group.