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1.
Syst Appl Microbiol ; 27(2): 211-8, 2004 Mar.
Article in English | MEDLINE | ID: mdl-15046310

ABSTRACT

Amplified Ribosomal-DNA Restriction Analysis (ARDRA) was used to differentiate among 12 species and 4 subspecies of the genus Staphylococcus. With a universal primer pair a 2.4 kbp PCR-product was amplified, including the 16S rDNA, the 16S-23S rDNA interspacer region, and about 500 bp of the 23S rDNA. Species-specific restriction patterns were found using the restriction enzymes HindIII and XmnI separately. Cheese related staphylococci were clearly differentiated. ARDRA results were in good agreement with results of partial sequencing of the 16S rDNA. ARDRA could fully replace the biochemical identification with ID32 Staph (BioMerieux) which was less reliable when staphylococci of cheese origin were analysed. Genomic restriction digests of cheese-related S. equorum strains by SmaI and SacI gave unique strain-specific restriction patterns which can be used to identify starter staphylococci in a complex microbial environment such as the surface of Red-Smear cheeses.


Subject(s)
Cheese/microbiology , Food Microbiology , Staphylococcus/classification , Staphylococcus/isolation & purification , DNA, Bacterial/chemistry , DNA, Bacterial/genetics , DNA, Ribosomal Spacer/chemistry , DNA, Ribosomal Spacer/genetics , Electrophoresis, Gel, Pulsed-Field , Polymerase Chain Reaction , RNA, Ribosomal, 16S/chemistry , RNA, Ribosomal, 16S/genetics , RNA, Ribosomal, 23S/chemistry , RNA, Ribosomal, 23S/genetics , Staphylococcus/genetics
2.
Syst Appl Microbiol ; 26(3): 438-44, 2003 Sep.
Article in English | MEDLINE | ID: mdl-14529187

ABSTRACT

ARDRA (Amplified Ribosomal-DNA Restriction Analysis) was used to differentiate among species and genera of Arthrobacter and Microbacteria. Species-specific restriction patterns of PCR-products were obtained with NciI for Arthrobacter citreus (DSM 20133T), A. sulfureus (DSM 20167T), A. globiformis (DSM 20124T) and A. nicotianae strains (DSM 20123T, MGE 10D, CA13, CA14, isolate 95293, 95294, and 95299), A. rhombi CCUG 38813T, and CCUG 38812, and Microbacterium barkeri strains (DSM 30123T, MGE 10D, CA12 and CA15, isolate 95292, and isolate 95207). All yellow pigmented coryneforme bacteria isolated from the smear of surface ripened cheeses were identified as either A. nicotianae or M. barkeri strains. Using pulsed field gel electrophoresis (PFGE) strain specific restriction pattern for all Arthrobacter species and Microbacteria tested were obtained with restriction enzymes AscI and SpeI.


Subject(s)
Actinomycetales/classification , Actinomycetales/isolation & purification , Arthrobacter/classification , Arthrobacter/isolation & purification , Cheese/microbiology , Actinomycetales/genetics , Arthrobacter/genetics , DNA Restriction Enzymes , DNA, Bacterial/analysis , DNA, Bacterial/isolation & purification , DNA, Ribosomal/analysis , DNA, Ribosomal/chemistry , Electrophoresis, Agar Gel , Electrophoresis, Gel, Pulsed-Field , Food Microbiology , Physical Chromosome Mapping , Polymerase Chain Reaction , Polymorphism, Restriction Fragment Length , RNA, Ribosomal, 16S/genetics , Sequence Analysis, DNA , Species Specificity
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