Details

Autor(en) / Beteiligte

• Diggles, B.K.
• Bass, D.
• Bateman, K.S.
• Chong, R.
• Daumich, C.
• Hawkins, K.A.
• Hazelgrove, R.
• Kerr, R.
• Moody, N.J.G.
• Ross, S.
• Stentiford, G.D.

Titel

Haplosporidium acetes n. sp. infecting the hepatopancreas of jelly prawns Acetes sibogae australis from Moreton Bay, Australia

Ist Teil von

• Journal of invertebrate pathology, 2022-05, Vol.190, p.107751-107751, Article 107751

Ort / Verlag

United States: Elsevier Inc

Erscheinungsjahr

2022

Link zum Volltext

Quelle

ScienceDirect

Beschreibungen/Notizen

• [Display omitted] •Wild caught jelly prawns from Moreton Bay, Australia, displayed visible opacity of the hepatopancreas.•Affected jelly prawns were infected by a novel haplosporidian parasite infecting all cell types within the hepatopancreas.•This is the first record of haplosporidiosis in sergestid shrimp, and the new haplosporidian is described as Haplosporidium acetes n. sp.•A novel microsporidian parasite infected hepatopancreatic epithelial cells of one jelly prawn. Wild Acetes sibogae australis from northern Moreton Bay, Australia displaying opacity of the hepatopancreas were sampled and examined histologically, revealing infection by multinucleate plasmodia of a haplosporidian-like parasite in the epithelial cells of the hepatopancreas. A morphological and phylogenetic investigation identified the parasite as a novel species of the order Haplosporida, and the parasite is described as Haplosporidium acetes n. sp. This is the first report of disease caused by a haplosporidian in wild Australian decapod crustaceans, and the first record of haplosporidiosis in sergestid shrimp. Infections of H. acetes were observed in all cell types (R, B, F and E) within the hepatopancreas. Infected epithelial cells became hypertrophied as they filled with haplosporidian parasites and, in heavy infections, caused almost complete displacement of normal hepatopancreas tissue. Although sporulation was not observed, infected jelly prawns appeared terminally diseased. Infections became grossly evident in around 5% of wild prawns during early autumn at a time of year when jelly prawn populations decline rapidly with decreasing water temperatures, however histopathology indicated at least 13% of apparently normal jelly prawns were also infected. Further studies are required in order to determine if this parasite influences jelly prawn population dynamics. In addition, we report co-infection of a novel microsporidian parasite in the Enterocytozoon Group Microsporidia (EGM) infecting nuclei of hepatopancreatic epithelial cells. The microsporidian was phylogenetically distinct from Enterocytozoon hepatopenaei (EHP) known to infect penaeid shrimp in Asia.