Oyster Mortality Studies in Virginia. II. The Fungus Disease Caused by Dermocystidium marinum in Oysters of Chesapeake Bay

PAGE INTRODUCTIONa. Studies in the Gulf of Mexicox. Discovery of Dermocystidiumn marinurm in Virginia 2 METHODS OF STUDY 2 The Thioglycollate Culture Technique 2 Rating the Intensity of Infections 3 Definitions of Terms 3 THE OCCURRENCE OF Dermocystidium marinuim IN LIVE OYSTERS 3 Seasonal Incidence of Infections 3 Intensity of Infections 5 Recapitulation ........ 6 THE OCCURRENCE OF Der-mocystidium marinumn IN GAPERS 6 Collection of Gapers 6 Seasonal Incidence ..... 6 Incidence in Gapers from Outlying Trays and Natural Habitats ..... 8 Recapitulation ........ 8 DISTRIBUTION OF Dermocystidium marinum IN CHESAPEAKE BAY 11 FUNGUS INFECTIONS IN RELATION TO AGE AND SouRCE OF OYSTEST.11 Data from Live Oysters . ..... 11 Data from Gapers ......... 12 Recapitulation. 13 EXPERIMENTAL INFECTION OF OYSTERS 14 Infection of Old Oysters ...... 14 Infection of Young Oysters I ........ 14 PAGE