The Pathogen index in freshwater drum (Aplodinotus grunniens R.) from the usumacinta river in southeastern mexico (Aplodinotus grunniens R.) from the usumacinta river in southeastern mexico: Pathogen index in freshwater drum from the usumacinta river . (2024). Agro Productividad. https://doi.org/10.32854/agrop.v17i8.2831