| first report of three protozoan parasites (a haplosporidian, marteilia sp. and marteilioides sp.) from the manila clam, venerupis (=ruditapes) philippinarum in japan. | recently, natural stocks of the manila clam, venerupis (=ruditapes) philippinarum, have been drastically reduced in japan. to clarify the reason for this decline in number, clams were sampled monthly from yamaguchi and processed for histological observations, during which three protozoan parasites were discovered. transmission electron microscopy revealed that these parasites were unidentified haplosporidian in the connective tissues, marteilia sp. in the digestive gland and marteilioides sp. in ... | 2005 | 15955337 |