広島湾産マガキOstrea gigasの異常斃死に関する細菌学的研究-3-

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1) It was already reported that the virulence of micro-organismus isolated from the unusually dead oysters became weak by the protracted subculturing in vitro. Now, it seems that these strains recover the virulence to a certain degree by passage through the living oysters. 2) The authors confirm that the oysters are infected with the above mentioned micro-organisms by way of the mouth and the digestive tract. 3) In the sea area where the oysters fall dead one after another, there are some oysters infected with the above mentioned micro-organisms among the survivals. The histo-pathological abnormality in these sufferers correlates with the degree of the bacterial infiltration and multiplication, and changes in reference to the change of the mortality.
社団法人日本水産学会の論文