Monogeneans are a diverse group of parasites that are commonly found on fish. Some monogenean species are highly pathogenic to cultured fish. The present study aimed to determine the in vitro anthelmintic effect of silver nanoparticles (AgNPs) against adults and eggs of monogeneans in freshwater using Cichlidogyrus spp. as a model organism. We tested two types of AgNPs with different synthesis methodologies and size diameters: ARGOVIT (35 nm) and UTSA (1–3 nm) nanoparticles. Damage to the parasite tegument was observed by scanning electron microscopy. UTSA AgNPs were more effective than ARGOVIT; in both cases, there was a concentration-dependent effect. A concentration of 36 μg/L UTSA AgNPs for 1 h was 100% effective against eggs and adult parasites, causing swelling, loss of corrugations, and disruption of the parasite’s tegument. This is an interesting result considering that monogenean eggs are typically tolerant to antiparasite drugs and chemical agents. To the best of our knowledge, no previous reports have assessed the effect of AgNPs on any metazoan parasites of fish. Therefore, the present work provides a basis for future research on the control of fish parasite diseases.
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We would like to thank María Berenit Mendoza Garfias (Instituto de Biología, UNAM) for her support in processing samples for scanning electron microscopy. Rosa María Medina Guerrero and Irma Eugenia Martínez Rodríguez (CIAD-Mazatlán) provided technical assistance. The present study was supported by the National Council of Science and Technology (CONACyT), Mexico, through grant no. 258607: “Estudio del efecto de nanopartículas de plata en virus, bacterias y parásitos de organismos acuáticos” and CONACyT Networks grant no. 293418.
This work was conducted using a tilapia–monogenean model system, and all procedures were performed in accordance with the ethical standards of the CIAD-Mazatlán following the American Veterinary Medical Association (AVMA) Guidelines for the Euthanasia of Animals.
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Pimentel-Acosta, C.A., Morales-Serna, F.N., Chávez-Sánchez, M.C. et al. Efficacy of silver nanoparticles against the adults and eggs of monogenean parasites of fish. Parasitol Res 118, 1741–1749 (2019). https://doi.org/10.1007/s00436-019-06315-9
- Control disease
- Silver nanoparticles