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自1992年9月～1994年11月，对青岛胶州湾养殖的扇贝及环境中的细菌组成和某些生态学特性进行了调查。养殖区表层海水中异养菌和弧菌平均数各波动于（21．2～39．7）×102／cm3和（7．3～19．2）×102／cm3之间。其中1号和4号站位的菌数比其它越位都高，这和它们靠近码头，受到附近的排水污染有关。在扇贝的消化盲囊和性腺内也分离到异养菌和弧菌，分别为103～105个g和103～105个／g。这些细菌可能因扇贝遇到环境改变防御能力下降时，扩散到其它器官并大量繁殖，因而造成感染而死亡。从对分离菌的药物敏感试验结果看，近年一些菌株对原来敏感的药物产生了抗药性，如四环索和链霉素，今后在育苗过程中避免滥用抗菌药物是十分重要的。
From September 1992 to November 1994, the bacterial composition and some ecological characteristics of scallops and their environment cultured in Jiaozhou Bay of Qingdao were investigated. The average number of heterotrophic bacteria and vibrios in the surface seawater of the aquaculture area fluctuated between (21.2-39.7) x 102 / cm3 and (7.3-19.2) x 102 / cm3, respectively. The numbers of bacteria on stations 1 and 4 were higher than those on the other offsides, which were close to the pier and polluted by nearby drainage. Heterotrophic bacteria and Vibrio spp. Were also isolated from the digestive gland and gonad of scallop, which ranged from 103 to 105 g and from 103 to 105 g / g, respectively. These bacteria may die as a result of infection as scallops encounter environmental changes and defensive capabilities decline, spreading to other organs and proliferating. From the results of drug susceptibility tests on isolates, in recent years, some strains have become resistant to the originally sensitive drugs, such as tetracycline and streptomycin. It is very important to avoid the abuse of antibiotics in the future.