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  • Title: Essential Oil of Piper marginatum (Piperaceae) Against Monogeneans, and Its Hematological and Histopathological Effects on Colossoma macropomum.
    Author: Alves CMG, de Jesus Baia RR, Pacheco AM, de Carvalho AA, Farias VA, Videira MN, Chagas FCM, Yoshioka ETO, Tavares-Dias M.
    Journal: Acta Parasitol; 2024 Jun; 69(2):1212-1218. PubMed ID: 38662072.
    Abstract:
    PURPOSE: This study investigated the anthelmintic efficacy of therapeutic baths with the essential oil of Piper marginatum Jacq against the monogeneans Anacanthorus spathulatus Kritsky, Thatcher & Kayton, 1979, Notozothecium janauachensis Belmont-Jégu, Domingues & Laterça 2004, Mymarothecium boegeri Cohen & Kohn, 2005 and Linguadactyloides brinkmanni Thatcher & Krytsky, 1983 in Colossoma macropomum Cuvier, 1818, and its hematological and histopathological effects on this fish. METHODS: Short six therapeutic baths with 100 mg/L of the essential oil of P. marginatum and two control groups (water from the cultivation tank and water from the cultivation tank + 70% alcohol) were used for 20 min every two days. RESULTS: The therapeutic baths with 100 mg/L of the essential oil of P. marginatum had efficacy of 42.8% against monogeneans of C. macropomum gills. Toxicity was low for C. macropomum, because there were few physiological and histopathological changes that did not compromise the functioning of the gills of this fish. CONCLUSION: Short therapeutic baths with 100 mg/L of the essential oil of P. marginatum had low efficacy for controlling monogeneans in C. macropomum and thus cannot be recommended.
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