Assertion: oyster | /r/CapableOf | show obvious macroscopic symptoms
Facets:
Source sentences:
text: Most infected oysters show no obvious macroscopic symptoms; however, infections sometimes accompanied by yellow discoloration & extensive gill & mantle lesions; becomes systemic & usually lethal when oysters 2-3 years old Marteiliasis Marteilia refringens Protozoan Discoloration of the digestive gland epithelia; cessation of growth; loss of tissue condition; decrease of glycogen reserves; may cause recurring mortalities Denman Island disease Microcytos mackini Protozoan Green to yellow pustules or abscess-like lesions (<5 mm), resulting from haemocyte infiltration & necrosis, occur within the body wall, on the surface of labial palps or mantle, or adductor muscle; often induces brown scar adjacent to mantle surface; parasite may cause recurrent abnormal mortality rates in older oysters
text: Most infected oysters show no obvious macroscopic symptoms; however, infections sometimes accompanied by yellow discoloration & extensive gill & mantle lesions; becomes systemic & usually lethal when oysters 2-3 years old No curative measures available; ensure good site selection & management practices to limit impact & compulsory oyster monitoring for transfers; zoning system Marteiliasis Marteilia refringens Protozoan Discoloration of the digestive gland epithelia; cessation of growth; loss of tissue condition; decrease of glycogen reserves; may cause recurring mortalities No curative measures available; ensure good site selection & management practices to limit impact & compulsory oyster monitoring for transfers; zoning system Denman Island disease Microcytos mackini Protozoan Green to yellow pustules or abscess-like lesions (<5 mm), resulting from haemocyte infiltration & necrosis, occur within the body wall, on the surface of labial palps or mantle, or adductor muscle; often induces brown scar adjacent to mantle surface; parasite may cause recurrent abnormal mortality rates in older oysters