Pathogenicity of Plectosporium oratosquillae and Acremonium sp. Isolated from Mantis Shrimp Oratosquilla oratoria against Kuruma Prawn Penaeus japonicus

Abstract

This study was carried out to assess the pathogenicity of Plectosporium oratosquillae NJM 0662 and Acremonium sp. NJM 0672, both of which were isolated from mantis shrimp Oratosquilla oratoris, to kuruma prawn Penaeus japonicus by intramuscular injection of conidial suspensions. These fungi caused mortality in the injected kuruma prawn. The diseased kuruma prawn showed numerous black spots in the gills. Histopathologically, hyphae in the gill filaments and the injected sites were encapsulated by hemocytes. The results indicate that these two fungi are pathogenic against kuruma prawn.