{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,31]],"date-time":"2026-07-31T02:14:12Z","timestamp":1785464052460,"version":"3.56.0"},"reference-count":48,"publisher":"Cambridge University Press (CUP)","issue":"9","license":[{"start":{"date-parts":[[2011,8,3]],"date-time":"2011-08-03T00:00:00Z","timestamp":1312329600000},"content-version":"unspecified","delay-in-days":2,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Parasitology"],"published-print":{"date-parts":[[2011,8]]},"abstract":"<jats:title>SUMMARY<\/jats:title><jats:p>Following previous work on the anti-giardial effect of blueberry polyphenols, a range of polyphenol-rich extracts from berries and other fruits was screened for their ability to kill <jats:italic>Giardia duodenalis<\/jats:italic>, an intestinal parasite of humans. Polyphenol-rich extracts were prepared from berries using solid-phase extraction and applied to trophozoites of <jats:italic>Giardia duodenalis<\/jats:italic> grown <jats:italic>in vitro<\/jats:italic>. All berry extracts caused inhibition at 166 <jats:italic>\u03bc<\/jats:italic>g gallic acid equivalents (GAE)\/ml phenol content but extracts from strawberry, arctic bramble, blackberry and cloudberry were as effective as the currently used drug, metronidazole, causing complete trophozoite mortality <jats:italic>in vitro<\/jats:italic>. Cloudberry extracts were found to be the most effective causing effectively complete trophozoite mortality at 66 <jats:italic>\u03bc<\/jats:italic>g GAE\/ml. The polyphenol composition of the more effective berry extracts suggested that the presence of ellagitannins could be an important factor. However, the potency of cloudberry could be related to high ellagitannin content but also to the presence of substantial amounts of unconjugated <jats:italic>p<\/jats:italic>-coumaric acid and benzoic acid. These <jats:italic>in vitro<\/jats:italic> effects occur at concentrations easily achievable in the gut after berry ingestion and we discuss the likelihood that berry extracts could be effective anti-giardial agents <jats:italic>in vivo<\/jats:italic>.<\/jats:p>","DOI":"10.1017\/s0031182011000825","type":"journal-article","created":{"date-parts":[[2011,8,3]],"date-time":"2011-08-03T22:54:05Z","timestamp":1312412045000},"page":"1110-1116","source":"Crossref","is-referenced-by-count":16,"title":["Differential effectiveness of berry polyphenols as anti-giardial agents"],"prefix":"10.1017","volume":"138","author":[{"given":"J.-P.","family":"ANTHONY","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"L.","family":"FYFE","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"D.","family":"STEWART","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"G. 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