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Yu L, Shi Y, Xing Z, Yan G. Detection and correlation analysis of shellfish pathogens in Dadeng Island, Xiamen. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:12601-12613. [PMID: 34263403 DOI: 10.1007/s11356-021-15176-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 06/24/2021] [Indexed: 06/13/2023]
Abstract
Food poisoning is caused by pathogenic bacteria in water and aquatic products, especially bivalves (e.g., oysters, clams), which can bioaccumulate pathogenic bacteria. Polluted water and aquatic products thus pose a serious threat to human health and safety. In this study, the types of pathogenic bacteria in water samples and shellfish collected from the Dadeng offshore area in Xiamen were examined. We also analyzed the relationships between dominant pathogens and major climate and water quality parameters. Our objective was to provide reference data that may be used to help prevent bacterial infections and to improve aquatic food hygiene in Xiamen and its surrounding areas to safe levels, thus ensuring the health of Xiamen residents. We found that the main pathogenic bacteria were Vibrio and Bacillus, with the dominant pathogen being Vibrio parahaemolyticus. Physical and chemical indexes (water temperature, salinity, pH, dissolved oxygen, and turbidity) of water bodies and the 3-day accumulated rainfall were found to be important factors affecting the occurrence and abundance of V. parahaemolyticus.
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Affiliation(s)
- Lei Yu
- Marine Biology College, Xiamen Ocean Vocational College, Xiamen, 361012, China
| | - Yijia Shi
- Fisheries College, Jimei University, Xiamen, 361021, China
| | - Zhiyong Xing
- Marine Biology College, Xiamen Ocean Vocational College, Xiamen, 361012, China
| | - Guangyu Yan
- Marine Biology College, Xiamen Ocean Vocational College, Xiamen, 361012, China.
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Liu H, Tan KS, Zhang X, Zhang H, Cheng D, Ting Y, Li S, Ma H, Zheng H. Comparison of Gut Microbiota Between Golden and Brown Noble Scallop Chlamys nobilis and Its Association With Carotenoids. Front Microbiol 2020; 11:36. [PMID: 32117095 PMCID: PMC7018768 DOI: 10.3389/fmicb.2020.00036] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 01/09/2020] [Indexed: 02/02/2023] Open
Abstract
Many marine bivalves are regarded as healthy foods due to their high carotenoid content. Only plants and microorganisms have natural carotenoids biosynthesis ability, hence, animals such as bivalves must obtain carotenoids from their diets. Due to the filter-feeding behavior of bivalves, they have high diversity of gut microbes. However, the relationship between gut microbes and carotenoids has not been explored in mollusks. In the present study, the interaction between gut microbes and carotenoids in two polymorphic noble scallop Chlamys nobilis, golden scallops (designated GG) and brown scallops (designated BW), were studied. The gut of GG and BW showed statistically different bacteria communities. Results from 16S rRNA gene sequencing and qPCR analysis revealed that the gut of GG had significantly higher relative abundance of carotenoids-producing bacteria Brevundimonas, compared with BW. Moreover, HPLC-MS analysis showed that isolate Brevundimonas could produce astaxanthin. The current findings are very useful as they could form the basis for future studies in determining the relationship between gut microbiota and carotenoids absorption in bivalves.
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Affiliation(s)
- Hongxing Liu
- Key Laboratory of Marine Biotechnology of Guangdong Province, Institute of Marine Sciences, Shantou University, Shantou, China
- Mariculture Research Center for Subtropical Shellfish & Algae of Guangdong Province, Shantou, China
- STU-UMT Joint Shellfish Research Laboratory, Shantou University, Shantou, China
| | - Kar Soon Tan
- Key Laboratory of Marine Biotechnology of Guangdong Province, Institute of Marine Sciences, Shantou University, Shantou, China
- Mariculture Research Center for Subtropical Shellfish & Algae of Guangdong Province, Shantou, China
- STU-UMT Joint Shellfish Research Laboratory, Shantou University, Shantou, China
| | - Xinxu Zhang
- Institute for Advanced Study, Shenzhen University, Shenzhen, China
| | - Hongkuan Zhang
- Key Laboratory of Marine Biotechnology of Guangdong Province, Institute of Marine Sciences, Shantou University, Shantou, China
- Mariculture Research Center for Subtropical Shellfish & Algae of Guangdong Province, Shantou, China
- STU-UMT Joint Shellfish Research Laboratory, Shantou University, Shantou, China
| | - Dewei Cheng
- Key Laboratory of Marine Biotechnology of Guangdong Province, Institute of Marine Sciences, Shantou University, Shantou, China
- Mariculture Research Center for Subtropical Shellfish & Algae of Guangdong Province, Shantou, China
- STU-UMT Joint Shellfish Research Laboratory, Shantou University, Shantou, China
| | - Ye Ting
- Key Laboratory of Marine Biotechnology of Guangdong Province, Institute of Marine Sciences, Shantou University, Shantou, China
- Mariculture Research Center for Subtropical Shellfish & Algae of Guangdong Province, Shantou, China
- STU-UMT Joint Shellfish Research Laboratory, Shantou University, Shantou, China
| | - Shengkang Li
- Key Laboratory of Marine Biotechnology of Guangdong Province, Institute of Marine Sciences, Shantou University, Shantou, China
- Mariculture Research Center for Subtropical Shellfish & Algae of Guangdong Province, Shantou, China
- STU-UMT Joint Shellfish Research Laboratory, Shantou University, Shantou, China
| | - Hongyu Ma
- Key Laboratory of Marine Biotechnology of Guangdong Province, Institute of Marine Sciences, Shantou University, Shantou, China
- Mariculture Research Center for Subtropical Shellfish & Algae of Guangdong Province, Shantou, China
- STU-UMT Joint Shellfish Research Laboratory, Shantou University, Shantou, China
| | - Huaiping Zheng
- Key Laboratory of Marine Biotechnology of Guangdong Province, Institute of Marine Sciences, Shantou University, Shantou, China
- Mariculture Research Center for Subtropical Shellfish & Algae of Guangdong Province, Shantou, China
- STU-UMT Joint Shellfish Research Laboratory, Shantou University, Shantou, China
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Succi G, Pialorsi S, Di Fiore L, Cardini G. The use of methanol-grown yeast LI-70 in feeds for broilers. Poult Sci 1980; 59:1471-9. [PMID: 7393857 DOI: 10.3382/ps.0591471] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
In 60-day feeding trials, broilers were fed commercial diets in which different amounts of methanol-grown yeast LI-70 replaced fish and soybean meal. In the first trial, all-mash diets containing up to 15% yeast produced growth rates and efficiencies of feed conversion almost equal to those of the soybean meal control and slightly below those of the fish meal control. In the second trial, pelleted diets containing up to 25% yeast were used. For yeast levels up to 15%, growth rates were faster than for the soybean meal control and slightly slower than for the fish meal control. Diets with more than 15% yeast lacked selenium. Diets containing 25% yeast as the sole source of protein but supplemented with .3 ppm selenium produced growth rates and efficiencies of feed conversion equal to those of the controls.
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Manachini PL. DNA sequence similarity, cell wall mannans and physiological characteristics in some strains of Candida utilis, Hansenula jadinii and Hansenula petersonii. Antonie Van Leeuwenhoek 1979; 45:451-63. [PMID: 576029 DOI: 10.1007/bf00443283] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The physiological characteristics, proton magnetic resonance spectra of cell wall mannans, DNA base composition and DNA sequence similarity of some strains of Candida utilis, Hansenula jadinii and Hansenula petersonii were examined. It was found that C. utilis was not distinguishable from H. jadinii by any of these criteria. These findings show the close genetic relationship between C. utilis and its perfect form H. jadinii. In contrast, H. petersonii was found to differ from C. utilis and H. jadinii on account of insignificant DNA reassociation as well as a number of other properties.
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