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If left untreated, CE can cause serious damage to multiple organs, especially the liver and lungs. Regarding the treatment, in the last few years, the use of pharmacological treatment has increased, suggesting that in the future, drug therapy may replace surgery for uncomplicated cysts. However, the only available anthelmintic drug to treat this infection is the albendazole, which has an efficacy that does not exceed 50%. On the basis of the above-mentioned evidence, new and improved alternative treatments are urgently needed. The use of natural products and their active fractions and components holds great promise as a valuable resource for the development of novel and effective therapies. Hop (Humulus lupulus L.) is a bittering agent in the brewing industry for which the sedative, digestive, anti-inflammatory, and antimicrobial effects have been reported. The purpose of this study was to assess the in vitro efficacy of methanolic extracts from the leaves of hop varieties against E. granulosus sensu stricto (s.s) protoscoleces. Varieties Mapuche and Victoria caused a stronger protoscolicidal effect compared to the Bullion, Cascade, and Traful varieties (<jats:inline-formula><a:math xmlns:a=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M1\"><a:mi>P<\/a:mi><a:mo>&lt;<\/a:mo><a:mn>0.01<\/a:mn><\/a:math><\/jats:inline-formula>), coinciding with their highest content of flavonoids, total polyphenols, and saponins. The viability of protoscoleces treated with the varieties Mapuche and Victoria decreased to approximately 50% at days 5\u2009y 8, respectively, showing alterations such as soma contraction and impaired microtriches. After 18\u2009days of treatment with both varieties, protoscoleces were completely altered both structurally and ultrastructurally. In conclusion, the methanolic extracts of the H. lupulus varieties Mapuche and Victoria demonstrated a marked in vitro effect against E. granulosus s.s. protoscoleces. The beer-making industry exclusively uses hop cones, leaving behind large amounts of hop leaves as an agricultural by-product that is not being utilized. On the basis of our study, we propose that hop leaves could also be used as a source of secondary metabolites with anthelmintic activity.<\/jats:p>","DOI":"10.1155\/2024\/6251666","type":"journal-article","created":{"date-parts":[[2024,4,5]],"date-time":"2024-04-05T01:54:24Z","timestamp":1712282064000},"page":"1-8","source":"Crossref","is-referenced-by-count":1,"title":["Evaluation of the Protoscolicidal Activity of Humulus lupulus Methanolic Extracts on Echinococcus granulosus Sensu Stricto"],"prefix":"10.1155","volume":"2024","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4424-7019","authenticated-orcid":true,"given":"Clara Mar\u00eda","family":"Albani","sequence":"first","affiliation":[{"name":"Instituto de Investigaciones en Producci\u00f3n Sanidad y Ambiente (IIPROSAM CONICET-UNMdP), Facultad de Ciencias Exactas y Naturales-UNMdP, Centro Cient\u00edfico Tecnol\u00f3gico Mar del Plata-CONICET, Centro de Asociaci\u00f3n Simple CIC PBA, Mar del Plata, 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