Inhibition of bacterial growth by mercury and the effects of protective agents
Twenty-two bacterial cultures were isolated from sediment samples, characterized morphologically and biochemically, and tested for resistance to mercury. Of all the cultures examined only two obligate anaerobes, Bacteroides and a Clostridium were found to be sensitive to very low levels of mercury....
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| Veröffentlicht in: | Bull. Environ. Contam. Toxicol.; (United States) 1978-01, Vol.20 (3), p.378-386 |
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| container_title | Bull. Environ. Contam. Toxicol.; (United States) |
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| creator | Hamdy, M.K Wheeler, S.R |
| description | Twenty-two bacterial cultures were isolated from sediment samples, characterized morphologically and biochemically, and tested for resistance to mercury. Of all the cultures examined only two obligate anaerobes, Bacteroides and a Clostridium were found to be sensitive to very low levels of mercury. Both the Bacteriodes and Clostridium were inhibited by 1.1 /sup +/g mercury or more per disc. In the presence of the same level of mercury and at a cell concentration of 10 CFU per ml of medium, the inhibition zones were greater for the Bacteriodes than for the Clostridium. Maximum protection of the entire cell population was noted against 5.0 ..mu..g Hg/ml when the buffer had 5.0 mg of sediment. The surviving fraction in the presence of 2.5 mg of sediment and 2.5 ..mu..g of mercury remained fairly constant (0.81) during the entire 15 minute exposure, indicating that this level of sediment completely protected the entire cell population against the bactericidal action of that level of mercury. 21 references, 2 figures, 1 table. |
| doi_str_mv | 10.1007/BF01683535 |
| format | Article |
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Of all the cultures examined only two obligate anaerobes, Bacteroides and a Clostridium were found to be sensitive to very low levels of mercury. Both the Bacteriodes and Clostridium were inhibited by 1.1 /sup +/g mercury or more per disc. In the presence of the same level of mercury and at a cell concentration of 10 CFU per ml of medium, the inhibition zones were greater for the Bacteriodes than for the Clostridium. Maximum protection of the entire cell population was noted against 5.0 ..mu..g Hg/ml when the buffer had 5.0 mg of sediment. The surviving fraction in the presence of 2.5 mg of sediment and 2.5 ..mu..g of mercury remained fairly constant (0.81) during the entire 15 minute exposure, indicating that this level of sediment completely protected the entire cell population against the bactericidal action of that level of mercury. 21 references, 2 figures, 1 table.</description><identifier>ISSN: 0007-4861</identifier><identifier>EISSN: 1432-0800</identifier><identifier>DOI: 10.1007/BF01683535</identifier><identifier>PMID: 708927</identifier><language>eng</language><publisher>United States</publisher><subject>560302 - Chemicals Metabolism & Toxicology- Microorganisms- (-1987) ; BACTERIA ; Bacteroides - drug effects ; Bacteroides - growth & development ; BIOLOGICAL EFFECTS ; CLOSTRIDIUM ; Clostridium - drug effects ; Clostridium - growth & development ; DOSE-RESPONSE RELATIONSHIPS ; ELEMENTS ; foods ; GROWTH ; INHIBITION ; MERCURY ; Mercury - antagonists & inhibitors ; Mercury - pharmacology ; METALS ; MICROORGANISMS ; PLANT GROWTH ; RADIATION, THERMAL, AND OTHER ENVIRON. 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Environ. Contam. Toxicol.; (United States)</title><addtitle>Bull Environ Contam Toxicol</addtitle><description>Twenty-two bacterial cultures were isolated from sediment samples, characterized morphologically and biochemically, and tested for resistance to mercury. Of all the cultures examined only two obligate anaerobes, Bacteroides and a Clostridium were found to be sensitive to very low levels of mercury. Both the Bacteriodes and Clostridium were inhibited by 1.1 /sup +/g mercury or more per disc. In the presence of the same level of mercury and at a cell concentration of 10 CFU per ml of medium, the inhibition zones were greater for the Bacteriodes than for the Clostridium. Maximum protection of the entire cell population was noted against 5.0 ..mu..g Hg/ml when the buffer had 5.0 mg of sediment. The surviving fraction in the presence of 2.5 mg of sediment and 2.5 ..mu..g of mercury remained fairly constant (0.81) during the entire 15 minute exposure, indicating that this level of sediment completely protected the entire cell population against the bactericidal action of that level of mercury. 21 references, 2 figures, 1 table.</description><subject>560302 - Chemicals Metabolism & Toxicology- Microorganisms- (-1987)</subject><subject>BACTERIA</subject><subject>Bacteroides - drug effects</subject><subject>Bacteroides - growth & development</subject><subject>BIOLOGICAL EFFECTS</subject><subject>CLOSTRIDIUM</subject><subject>Clostridium - drug effects</subject><subject>Clostridium - growth & development</subject><subject>DOSE-RESPONSE RELATIONSHIPS</subject><subject>ELEMENTS</subject><subject>foods</subject><subject>GROWTH</subject><subject>INHIBITION</subject><subject>MERCURY</subject><subject>Mercury - antagonists & inhibitors</subject><subject>Mercury - pharmacology</subject><subject>METALS</subject><subject>MICROORGANISMS</subject><subject>PLANT GROWTH</subject><subject>RADIATION, THERMAL, AND OTHER ENVIRON. 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POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT</topic><topic>RESPONSE MODIFYING FACTORS</topic><topic>SEDIMENTS</topic><topic>Time Factors</topic><topic>TOLERANCE</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hamdy, M.K</creatorcontrib><creatorcontrib>Wheeler, S.R</creatorcontrib><creatorcontrib>Univ. of Georgia, Athens</creatorcontrib><collection>AGRIS</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>OSTI.GOV</collection><jtitle>Bull. Environ. Contam. Toxicol.; (United States)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hamdy, M.K</au><au>Wheeler, S.R</au><aucorp>Univ. of Georgia, Athens</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Inhibition of bacterial growth by mercury and the effects of protective agents</atitle><jtitle>Bull. Environ. Contam. Toxicol.; (United States)</jtitle><addtitle>Bull Environ Contam Toxicol</addtitle><date>1978-01-01</date><risdate>1978</risdate><volume>20</volume><issue>3</issue><spage>378</spage><epage>386</epage><pages>378-386</pages><issn>0007-4861</issn><eissn>1432-0800</eissn><abstract>Twenty-two bacterial cultures were isolated from sediment samples, characterized morphologically and biochemically, and tested for resistance to mercury. Of all the cultures examined only two obligate anaerobes, Bacteroides and a Clostridium were found to be sensitive to very low levels of mercury. Both the Bacteriodes and Clostridium were inhibited by 1.1 /sup +/g mercury or more per disc. In the presence of the same level of mercury and at a cell concentration of 10 CFU per ml of medium, the inhibition zones were greater for the Bacteriodes than for the Clostridium. Maximum protection of the entire cell population was noted against 5.0 ..mu..g Hg/ml when the buffer had 5.0 mg of sediment. The surviving fraction in the presence of 2.5 mg of sediment and 2.5 ..mu..g of mercury remained fairly constant (0.81) during the entire 15 minute exposure, indicating that this level of sediment completely protected the entire cell population against the bactericidal action of that level of mercury. 21 references, 2 figures, 1 table.</abstract><cop>United States</cop><pmid>708927</pmid><doi>10.1007/BF01683535</doi><tpages>9</tpages></addata></record> |
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| ispartof | Bull. Environ. Contam. Toxicol.; (United States), 1978-01, Vol.20 (3), p.378-386 |
| issn | 0007-4861 1432-0800 |
| language | eng |
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| source | MEDLINE; SpringerLink Journals - AutoHoldings |
| subjects | 560302 - Chemicals Metabolism & Toxicology- Microorganisms- (-1987) BACTERIA Bacteroides - drug effects Bacteroides - growth & development BIOLOGICAL EFFECTS CLOSTRIDIUM Clostridium - drug effects Clostridium - growth & development DOSE-RESPONSE RELATIONSHIPS ELEMENTS foods GROWTH INHIBITION MERCURY Mercury - antagonists & inhibitors Mercury - pharmacology METALS MICROORGANISMS PLANT GROWTH RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT RESPONSE MODIFYING FACTORS SEDIMENTS Time Factors TOLERANCE |
| title | Inhibition of bacterial growth by mercury and the effects of protective agents |
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