Karel Torres-Lozano‡, Milagros Cabrera-Soregui§, Enrique Garcia-Candela§, Victor Puicon-Niño de Guzman‡, Fernando Mesias-Valle§Corresponding author: Fernando Mesias-Valle ( fmesias@itp.gob.pe ) © Karel Torres-Lozano, Milagros Cabrera-Soregui, Enrique Garcia-Candela, Victor Puicon-Niño de Guzman, Fernando Mesias-Valle. This is an open access preprint distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Citation:
Torres-Lozano K, Cabrera-Soregui M, Garcia-Candela E, Puicon-Niño de Guzman V, Mesias-Valle F (2023) Histological lesions by monogeneans in gills of Piaractus brachypomus farmed in semi-intensive systems from Peru. ARPHA Preprints. https://doi.org/10.3897/arphapreprints.e113306 |  |
Piaractus brachypomus is the most produced Amazonian fish in Peru; however, little is known about histological lesions that monogeneans produce in their gills. When examining 40 juveniles of P. brachypomus from two comercial fish farms, presence of Anacanthorus penilabiatus and Mymarothecium viatorum were found, with a total monogenean prevalence of 100%, with a mean intensity and mean abundance of 225.5 parasites/fish for both indices. At the level of the gill tissue, lesions identified were dilation and congestion of the central vein and hyperplasia of the secondary lamella with eosinophilic and lymphocytic infiltration. This is the first report of histopathological alterations caused by the infection of Anacanthorus penilabiatus and Mymarothecium viatorum in cultured groups of P. brachypomus in the Peruvian Amazon, and indicates the need to improve good practices and biosafety in the production of this fish to prevent or control the impact of these monogeneans.