Comparison of Marteilioides chungmuensis infection in the Pacific oyster Crassostrea gigas cultured in different conditions

Non-specific Defensive Factors of the Pacific OysterCrassostrea gigasagainst Infection withMarteilioides chungmuensis: A Flow-Cytometric Study

“…Infections with Marteilioides chungmuensis , a paramyxean protozoa affecting the normal oviposition and development of fertilized eggs and impairing the product quality by damaging the visual attractiveness have been identified as causative factors in the reduced aquaculture production of oysters, C. gigas [ 2 ]. Studies of this ovarian parasite included the assessment of microstructures [ 3 ], process of spore formation [ 4 ], initial infection route[ 5 ], rate of infection [ 2 , 4 , 6 , 7 ], development of diagnostic methods [ 8 , 9 ], pathogenicity [ 2 , 9 ], biochemical examinations [ 6 ], and effects of environmental factors [ 10 , 11 ]. A variety of such studies have been conducted in Korea and Japan.…”

Fish and Shellfish Diseases Caused by Marine Protists

“…However, their growth rate is signifi cantly lower than that of control oysters (Tun et al 2006 ); therefore, further revision of this management strategy is needed practically.…”

A study of diagnostic methods for Marteilioides chungmuensis infections in the Pacific oyster Crassostrea gigas

“…Marteilioides chungmuensis infects farmed oysters in Korea and Japan (Seki, 1934;Chun, 1979;Park et al, 1999Park et al, , 2003Tun et al, 2006aTun et al, ,b, 2008, and histology and transmission electron microscopy have mainly been used to diagnose this parasite. But, the early developmental stages of M. chungmuensis are difficult to observe using histology alone, and this has restricted accurate diagnosis of infected oysters (Itoh et al, 2004).…”