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Increasing drug resistance of these bacteria against standard antibiotics, and the more widespread use of herbal medicines, favours investigations into additional anti\u2010<jats:italic>Helicobacter<\/jats:italic> and anti\u2010<jats:italic>Campylobacter<\/jats:italic> effects of phytotherapeutics that are already used for their beneficial effects on bowel and digestive functions.<\/jats:p><jats:p>Twenty\u2010one hydroethanol herbal extracts and four essential oils were screened for antibacterial activity using a modification of a previously described micro\u2010dilution assay and compared with the inhibitory effects of antibiotics. The herbal extracts showing the highest growth inhibition of <jats:italic>C. jejuni<\/jats:italic> were <jats:italic>Calendula officinalis, Matricaria recutita, Zingiber officinale, Salvia officinalis, Foeniculum vulgare<\/jats:italic> and <jats:italic>Silybum marianum. Agrimonia eupatoria, Hydrastis canadensis, Filipendula ulmaria<\/jats:italic> and <jats:italic>Salvia officinalis<\/jats:italic> were the most active herbal extracts in inhibiting the growth of <jats:italic>H. pylori<\/jats:italic>. This study provides evidence for additional beneficial effects of phytotherapeutics marketed for their gastrointestinal effects and identifies new beneficial antibacterial effects for some herbal medicines not currently recommended for gastrointestinal problems. 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