ria e ▁were ▁found ▁to ▁be ▁necessary ▁for ▁c oc ulture ▁bio film ▁formation ▁with ▁Stre pt oc oc cus ▁g ordon ii . ▁Inter pro xim al ▁and ▁horizontal ▁al ve olar ▁b one ▁loss ▁in ▁mouse ▁models ▁are ▁seen ▁in ▁coin fe ctions ▁involving ▁P . ▁ging ival is ▁and ▁Tre pon ema ▁d entic ola . ▁The ▁role ▁of ▁P . ▁ging ival is ▁in ▁period ont itis ▁is ▁studied ▁using ▁specific ▁path ogen - free ▁mouse ▁models ▁of ▁period ont al ▁in fe ctions . ▁In ▁these ▁models , ▁P . ▁ging ival is ▁in oc ulation ▁causes ▁significant ▁b one ▁loss , ▁which ▁is ▁a ▁significant ▁characteristic ▁of ▁the ▁disease . ▁In ▁contrast , ▁germ ▁free ▁m ice ▁in oc ulated ▁with ▁a ▁P . ▁ging ival is ▁mon oin fection ▁in cur ▁no ▁b one ▁loss , ▁indicating ▁that ▁P . ▁ging ival is ▁alone ▁cannot ▁indu ce ▁period ont itis . ▁ ▁See ▁also ▁▁ ▁List ▁of ▁b acter ial ▁v ag inos is ▁micro bi ota ▁ ▁References ▁ ▁External ▁links ▁Type ▁stra in ▁of ▁P orph y rom onas ▁ging ival is ▁at ▁Bac D ive ▁– ▁ ▁the ▁B acter ial ▁D iversity ▁Met ad atabase ▁ ▁Category : B act ero id etes ▁Category : Infl am mat ory ▁dise ases ▁of ▁female ▁pel vic ▁org ans ▁Category : Re product ive ▁system ▁Category : G yna ec ology ▁Category : S ex ual ▁health ▁Category : B acter ial ▁v ag