Systematic review on medicinal plants used for the treatment of Giardia infection

Alnomasy, Sultan and LateefAl-Awsi, Ghaidaa Raheem and Raziani, Yosra and Niazi, Massumeh and Mahmoudvand, Hossein (2021) Systematic review on medicinal plants used for the treatment of Giardia infection. Saudi Journal of Biological Sciences.

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Abstract

Background However, broad adoption of herbal remedies for giardiasis is at present hampered by uncertain findings of investigation not always sufficiently powered. This study was aimed at systematically reviewing the existing literature in herbal medicines to treat giardiasis. Methods This review was carried out 06- PRISMA guideline and registered in the CAMARADES-NC3Rs Preclinical Systematic Review and Meta-Analysis Facility (SyRF) database. The search was performed in five databases which are Scopus, PubMed, Web of Science, EMBASE, and Google Scholar without time limitation for all published articles (in vitro, in vivo, and clinical studies). The searched words and terms were: “Giardia”, “giardiasis”, “extract”, “essential oil”, “herbal medicines”, “anti-Giardia”, “In vitro”, “In vivo”, “clinical trial” etc. Results Out of 1585 papers, 40 papers including 28 in vitro (70.0%), 7 in vivo (17.5%), 2 in vitro/ in vivo (5.0%), and 3 clinical trials (7.5%) up to 2020, met the inclusion criteria for discussion in this systematic review. The most widely used medicinal plants against Giardia infection belong to the family Lamiaceae (30.0%) followed by Asteraceae (13.5%), Apiaceae (10.5%). The most common parts used in the studies were aerial parts (45.0%) followed by leaves (27.4%) and seeds (7.5%). The aqueous extract (30.0%), essential oil (25.4%) and hydroalcholic and methanolic (10.5%) were considered as the desired approaches of herbal extraction, respectively. Conclusion The current review showed that the plant-based anti-Giardia agents are very promising as an alternative and complementary resource for treating giardiasis since had low significant toxicity. However, more studies are required to elucidate this conclusion, especially in clinical systems.

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