title: Occurrence of the oribatid mite Trhypochthoniellus longisetus longisetus (Acari: Trhypochthoniidae) on tilapia Oreochromis niloticus.
abstract: Mites as parasites infesting fish have been described in a few case reports involving Histiostoma anguillarum, H. papillata, and Schwiebea estradai. We describe the unexpected occurrence of oribatid mites of the genus Trhypochthoniellus on farmed tilapia Oreochromis niloticus. The fish had mites on the skin, fins, and gills, as well as in the mouth. The morphological characteristics of the mites, observed by optical and scanning electron microscopy, were consistent with those described for T. longisetus longisetus. All stages of development were observed, suggesting that the mites were able to actively reproduce on fish.
authors.affiliation: Grupo de Investigación Epicontrol, Departamento de Sanidad Animal, Facultad de Veterinaria de la Universidad Complutense de Madrid, Avda. Puerta de Hierro s/n, 28040 Madrid, Spain.
authors.forename: A Sonia
authors.initials: AS
authors.lastname: Olmeda
authors.forename: M Mar
authors.initials: MM
authors.lastname: Blanco
authors.forename: José L
authors.initials: JL
authors.lastname: Pérez-Sánchez
authors.forename: Mónica
authors.initials: M
authors.lastname: Luzón
authors.forename: Morris
authors.initials: M
authors.lastname: Villarroel
authors.forename: Alicia
authors.initials: A
authors.lastname: Gibello
mesh_terms: D000818:Animals; D023681:Cichlids; D005393:Fish Diseases / Q000469:parasitology*; D008924:Mite Infestations / Q000469:parasitology / Q000662:veterinary*; D008925:Mites / Q000145:classification* / Q000648:ultrastructure