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. 1981 Apr;13(4):688–695. doi: 10.1128/jcm.13.4.688-695.1981

Metal requirements of Legionella pneumophila.

M W Reeves, L Pine, S H Hutner, J R George, W K Harrell
PMCID: PMC273860  PMID: 6785311

Abstract

Serial passage of six strains of Legionella pneumophila and one strain of Pseudomonas aeruginosa in a liquid chemically defined medium deficient in trace metals resulted in the death of five L. pneumophila strains and very limited growth in the remaining strain and the P. aeruginosa strain. Addition of either iron or magnesium restored growth to almost normal levels in all of the strains when early-passage inocula were used. A low concentration of magnesium stimulated growth with cobalt, copper, iron, manganese, molybdenum, vanadium, or zinc. When a complete defined medium containing trace metals was used, growth was inhibited by adding the chelators ethylenediaminetetraacetic acid, citrate, or 2,2'-bipyridyl. Chelator inhibition was partly or fully relieved with either calcium, cobalt, copper, iron, magnesium, molybdenum, nickel, vanadium, or zinc. P. aeruginosa differed from L. pneumophila in that it required higher concentrations of each chelator to inhibit growth and that its growth was stimulated by only four metals: calcium, iron, magnesium, and zinc. A trace-metal supplement for L. pneumophila was designed which included all metals stimulating growth in these experiments and which proved to be sufficient for optimal growth of all the strains.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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