. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 234 REPORTS FROM THE MBL GENERAL SCIENTIFIC MEETINGS. :-l *1 "i Figure 1. Wn/ rctutiim n/1 Sepia .v/'/i. M Vibrio alginolylicus. f/Aj Granuloma-like fornnitioti in lite accessory nUlu/ni'iituI xluiiil. (B) Coagulative necrosis and bacteria in the center of the granuloma (1) are surrounded by a layer of dying heinocytcs (2). which is in mm surrounded by a fibrotic heiiiocvtic renction 13). Id Moderate inflammation in the branchial heart is typified by large numbers of bacteria and cellular necrosis (It, and he
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 234 REPORTS FROM THE MBL GENERAL SCIENTIFIC MEETINGS. :-l *1 "i Figure 1. Wn/ rctutiim n/1 Sepia .v/'/i. M Vibrio alginolylicus. f/Aj Granuloma-like fornnitioti in lite accessory nUlu/ni'iituI xluiiil. (B) Coagulative necrosis and bacteria in the center of the granuloma (1) are surrounded by a layer of dying heinocytcs (2). which is in mm surrounded by a fibrotic heiiiocvtic renction 13). Id Moderate inflammation in the branchial heart is typified by large numbers of bacteria and cellular necrosis (It, and hemocytic infiltration (2). (Dl The periphery of the kidney frond.', are necrotic and bacteria-laden (I). while a front of heinocytes infiltrates the tissue from vessels in the core (2). A normal tissue frond is also present (3). Crustaceans, including amphipods, are the primary food fed to cuttlefish cultured at the MRC. and thus may be an important source of infection. Finally, over half of the studied cuttlefish with reproductive-associated lesions were at or near the upper limit of their life span (8), suggesting that senescent tissues are more susceptible to this pathogen and are a potential point of initiation for a systemic infection. This retrospective study shows that systemic V. alginolyticus is a common pathogen in Sepia spp. cultured at the MRC. A number of potential routes of infection exist but, as in most aquatic animal diseases, stress and husbandry likely play an important role in the occurrence of disease. Better sepoid husbandry methods may help reduce or prevent this disease from occurring. Additionally, the data collected in this study indicate that, when systemic bacterial disease is suspected in Sepia spp., the branchial heart and branchial heart appendage should be examined histologically, and bacterial cultures should be obtained from the renal sac. Literature Cited 1 Wenuganen, S., R. Bullis, and R. Smiilowitz. 1997. Biol. Bull. 193: 269-27(1. 2. Bulows,
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
