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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Identification of dimethyl disulfide-forming bacteria isolated from activated sludge.

Twenty-four strains with high dimethyl disulfide (DMDS)-forming ability were isolated from activated sludge and identified to the genus level. These bacteria were classified into four groups (A, B, C, and D) by the API ZYM System (API System S.A., Montalieu, France). Group A (three strains) was identified as genus Lactobacillus by the API 20B System, by the method of Cowan and Steel, and by production of lactic acid as confirmed by gas-liquid chromatography. Group B (eight strains) was identified as genus Corynebacterium by API 20B and the Cowan and Steel method. Group C (one strain) was suggested to belong to genus Corynebacterium by the API 20B System. Group D (12 strains) was identified as genus Pseudomonas or Alcaligenes by the API 20B System, as genus Alcaligenes by the Cowan and Steel method, and as Achromobacter group Vd by the API 20NE System. However, on the basis of guanine-plus-cytosine contents in DNA and form of flagella, these strains were identified as genus Pseudomonas. Formation of DMDS from DL-methionine and S-methyl-L-cysteine was tested. DMDS-forming bacteria isolated from activated sludge formed DMDS from both precursors. In genus Pseudomonas, P. aeruginosa could not form DMDS from either precursor, but P. acidovorans, P. alcaligenes, P. pseudoalcaligenes, and P. testosteroni formed DMDS. In genus Alcaligenes, A. denitrificans subsp. xylosoxydans, A. denitrificans subsp. denitrificans, A. faecalis, and A. odorans formed DMDS from both precursors. Achromobacter group Vd formed DMDS from S-methyl-L-cysteine, but could not from DL-methionine.[1]

References

  1. Identification of dimethyl disulfide-forming bacteria isolated from activated sludge. Tomita, B., Inoue, H., Chaya, K., Nakamura, A., Hamamura, N., Ueno, K., Watanabe, K., Ose, Y. Appl. Environ. Microbiol. (1987) [Pubmed]
 
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