K. oxytoca is a commensal bacteria normally found in the gut and respiratory tract of humans, however is an emerging pathogen.
Streptococcus pneumoniae can cause very serious gynaecological infections in women, however this is rare.
GBS can harmlessly inhabit the vagina, sometimes causing infections and unpleasant symptoms, though this remains controversial between practitioners.
Klebsiella pneumoniae may be involved in vulvovaginal and urinary tract infections, being part of aerobic vaginitis.