Adaptation ofHelicobacter pylori to aerobic growth

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Two of 23 strains ofHelicobacter pylori adapted from microaerobic to aerobic growth on blood agar plates incubated in humidified air. The airadapted strains remained urease and phenylalanine deaminase positive and did not require the buffering effect of an enriched CO2 atmosphere for growth. The significance of this phenomenon remains to be determined as the two strains capable of aerobic metabolism were laboratory-adapted.