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Biopsies de l'estomac (antre) ou prélèvement de sellesSi prélèvement invasif : anapath à la recherche d'une inflammation // bactério pour chercher une activité uréasique très forte + culture indispensable pour sensibilité(éventuellement PCR)Si non invasif : respirométrie (test à l'urée) ou recherche d'antigènes spécifiques dans les selles (enfants ++)
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