▁in ▁ 1 9 7 9 , ▁and ▁that ▁version ▁included ▁the ▁following ▁quote ▁from ▁the ▁Director ▁of ▁the ▁Oregon ▁State ▁Board ▁of ▁Health , ▁suggesting ▁that ▁di arr he a ▁from ▁Gi ard ia ▁was ▁still ▁being ▁attributed ▁to ▁other ▁causes ▁by ▁health ▁authorities ▁in ▁ 1 9 5 4 : ▁ ▁Hel ic ob acter ▁p yl ori ▁( 1 8 9 2 - 1 9 8 2 ) ▁ ▁In fection ▁with ▁the ▁b acter ia ▁Hel ic ob acter ▁p yl ori ▁is ▁the ▁cause ▁of ▁most ▁st om ach ▁ul cers . ▁The ▁discovery ▁is ▁generally ▁cred ited ▁to ▁Australian ▁g astro enter olog ists ▁Dr . ▁Barry ▁Marshall ▁and ▁Dr . ▁J ▁Robin ▁Warren , ▁who ▁published ▁their ▁find ings ▁in ▁ 1 9 8 3 . ▁The ▁pair ▁received ▁the ▁Nobel ▁Prize ▁in ▁ 2 0 0 5 ▁for ▁their ▁work . ▁Before ▁this , ▁nobody ▁really ▁knew ▁what ▁caused ▁st om ach ▁ul cers , ▁though ▁a ▁popular ▁belief ▁was ▁that ▁the ▁" str ess " ▁played ▁a ▁role . ▁Some ▁research ers ▁suggested ▁that ▁ul cers ▁were ▁a ▁psych os om atic ▁ill ness . ▁ ▁In ▁H ▁P yl ori ▁P ione ers , ▁Dr . ▁Marshall ▁noted ▁that ▁other ▁phys icians ▁had ▁produced ▁evidence ▁of ▁H . ▁p yl ori ▁in fection ▁as ▁early ▁as ▁ 1 8 9 2 . ▁Marshall ▁writes ▁that ▁earlier ▁reports ▁were ▁dis reg arded ▁because ▁they ▁conflic ted ▁with ▁existing ▁belief . ▁The ▁first ▁description ▁of