“…Mycoplasma serogroup 11 induces vulvovaginitis, cervicitis, endometritis, epididymitis and oophoritis (Ruffin, 2001), is pathogenic to the udder of lactating sheep and produces marked biochemical alterations in the milk (Kumar et al, 1993;Rana et al, 1993). M. bovigenitalium is commonly isolated from the reproductive tracts of cattle and buffaloes and some strains are implicated in mastitis, arthritis, balanoposthitis and genital discards (Afshar et al, 1966;Jackson & Boughton, 1991;Razin & Freundt, 1984;Thiede et al, 2002). Variations in virulence in bovine udder infections exist for different strains of M. bovigenitalium (Mackie & Ball, 1984): a`mastitis strain', isolated from an abnormal dry udder secretion, was highly pathogenic, and a`vaginal strain', isolated from the vaginal mucus of a cow after abortion, produced a low level infection.…”