Studies on gaffkemia, a bacterial disease of the American lobster, Homarus americanus (Milne-Edwards) |
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| Authors: | H Rabin |
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| Affiliation: | 1. Marine Biology Laboratory, Woods Hole, Massachusetts, USA;2. Department of Pathobiology, School of Hygiene and Public Health, The Johns Hopkins University, Baltimore, Maryland, USA;1. Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine, City University of Hong Kong, Hong Kong;2. State Key Laboratory of Aquatic Animal Health, Food Inspection & Quarantine Technical Center, 1011 Building of Fuqiang Road, Futian Qu, Shenzhen, Guangdong Provinces, 518045, PR China;3. Chemical Testing Services, Faculty of Science, Hong Kong Baptist University, Hong Kong;4. Department of Systems Engineering and Engineering Management, School of Data Science, City University of Hong Kong, Hong Kong;1. Department of Biology and Guangdong Provincial Key Laboratory of Marine Biotechnology, Shantou University, Shantou 515063, China;2. STU-UMT Joint Shellfish Research Laboratory, Shantou University, Shantou 515063, China;3. Key Laboratory of Plant Cell Engineering and Germplasm Innovation of Ministry of Education/Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Sciences, Shandong University, Jinan, Shandong, 250100, China;4. Department of Microbiology and Immunology, School of Medicine, University of Maryland and Institute of Marine and Environmental Technology, Baltimore, Maryland 21202 |
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| Abstract: | A study was made of the local distribution of Gaffkya homari Hitchner and Snieszko and of its host-parasite relationship with the American lobster, Homarus americanus (Milne-Edwards). Of the lobsters from the Marine Biological Laboratory supply, 11.8–32% were found infected and one out of ten lobsters caught off Woods Hole was infected with a Gaffkya-like organism. No isolations were made from lobsters dragged from the edge of the continental shelf nor from lobsters trapped off Martha's Vineyard. G. homari, when inoculated into healthy lobsters, established bacteremia or septcemia on the first or second day after inoculation and induced mortality a few days later. Uninfected lobsters or those pretreated with Vibrio endotoxin did not acquire the disease on contact with the exception of one uninfected contact lobster which developed a slight, temporary bacteremia but survived. Twenty out of 21 lobster sera when tested in vitro stimulated the growth of G. homari while only one out of 21 sera stimulated the growth of Vibrio and seven actually inhibited it. Prior inoculation of heat-killed G. homari did not alter the course of the infection. Such pretreatment also had no influence on the in vitro activity of the serum. |
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