(Infection with Bonamia exitiosa, Bonamia ostreae, Marteilia refringens, Microcytos mackini, Perkinsus marinus)
The national reference laboratory for mollusc diseases (NRL-Mu) is located at the Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, and is responsible for coordinating and ensuring the diagnosis of mollusc diseases, mainly parasitic diseases, based on the German regulation on fish diseases and the EU legislation. The EU Directive on Aquaculture lists Bonamiosis, caused by Bonamia ostrea and its variants, and Marteiliosis, caused by Marteilia refringens and its variants. Based on the recommendations of the Office International des Epizooties (WOAH) another Bonamiosis, caused by Bonamia exitiosa, Microcytosis (Microcytos mackani) and Perkinsosis (Perkinsus marinus) must furthermore be diagnosed and differentiated. The NRL-Mu consists of the following NRLs: NRL for Bonamiosis, NRL for Marteiliosis, NRL for exotic parasites of molluscs (B. exitiosa, M. mackani, P. marinus). The NRL also investigates other mollusc diseases such as abalone diseases.
The diseases are notifiable in case of abnormal mortality in association with the detection of the pathogens.
In addition to parasitic diseases, irido-, herpes- and birnaviruses can be detected in molluscs.