scholarly journals Genetic Transfer of Salmonella typhimurium and Escherichia coli Lipopolysaccharide Antigens to Escherichia coli K-12

1972 ◽  
Vol 111 (3) ◽  
pp. 758-770 ◽  
Author(s):  
Randall T. Jones ◽  
Donald E. Koeltzow ◽  
B. A. D. Stocker
Keyword(s):  
Escherichia Coli ◽  
Salmonella Typhimurium ◽  
Genetic Transfer ◽  
K 12 ◽  
Escherichia Coli Lipopolysaccharide

scholarly journals A study of the genotoxic potential of flavonoids using short-term bacterial assays.

1993 ◽  
Vol 40 (4) ◽  
pp. 549-554 ◽  
Author(s):  
H Czeczot ◽  
J Kusztelak
Keyword(s):  
Escherichia Coli ◽  
Salmonella Typhimurium ◽  
Mutagenic Effect ◽  
Short Term ◽  
Sos System ◽  
Genotoxic Potential ◽  
Sos Chromotest ◽  
Activation System ◽  
K 12 ◽  
Alkylate Dna

Genotoxic activities of flavonoids (quercetin, rhamnetin, isorhamnetin, apigenin, luteolin) were investigated using two short-term bacterial assays. In the "repair test" in Salmonella typhimurium (strains TA1538 uvrB- and TA1978 uvrB+) the flavonoids studied did not introduce any damage into the DNA recognized by UvrABC nuclease (correndonuclease II). The results of the SOS-Chromotest in Escherichia coli K-12 strains PQ37 (tag+, alk+) and PQ243 (tagA, alkA) indicated that flavonoids only weakly induced the SOS system. The addition of a liver activation system (S9 mix) did not increase the mutagenic effect of the flavonoids tested. Two compounds: rhamnetin, isorhamnetin and their putative metabolites formed in the presence of the S9 mix did not alkylate DNA at N-3 of adenine.

Nucleotide sequence of the metH gene of Escherichia coli K-12 and comparison with that of Salmonella typhimurium LT2

Gene ◽  
1990 ◽  
Vol 87 (1) ◽  
pp. 15-21 ◽  
Author(s):  
Iain G. Old ◽  
Danielle Margarita ◽  
Robert E. Glass ◽  
Isabelle Saint Girons
Keyword(s):  
Escherichia Coli ◽  
Nucleotide Sequence ◽  
Salmonella Typhimurium ◽  
K 12

scholarly journals Plasmid studies ofSalmonella typhimuriumphage type 179 resistant to ampicillin, tetracycline, sulphonamides and trimethoprim

1980 ◽  
Vol 85 (2) ◽  
pp. 293-300 ◽  
Author(s):  
D. M. Anderson
Keyword(s):  
Escherichia Coli ◽  
Molecular Weight ◽  
New Zealand ◽  
Salmonella Typhimurium ◽  
National Health ◽  
Gel Electrophoresis ◽  
Phage Type ◽  
Agarose Gel ◽  
Agarose Gel Electrophoresis ◽  
K 12

SUMMARYSixteen strains ofSalmonella typhimuriumphage type 179 were referred to the National Health Institute, Wellington, New Zealand, from 1977 to 1979. This phage type had not been observed here before 1977. All strains were resistant to ampicillin, several were also resistant to tetracycline, and several were resistant to ampicillin, tetracycline, sulphafurazele and trimethoprim. All resistances could be transferred toEscherichia coliK 12. Plasmids from these strains and their transconjugants were characterized by agarose gel electrophoresis. It appears that resistance to sulphafurazole and trimethoprim is carried on a plasmid with a molecular weight of 5·2 Mdal and that resistance to ampicillin and tetracycline is carried on a plasmid with a molecular weight of approximately 60 Mdal.

scholarly journals Bacteriophage PhiX174's Ecological Niche and the Flexibility of Its Escherichia coli Lipopolysaccharide Receptor

2010 ◽  
Vol 76 (21) ◽  
pp. 7310-7313 ◽  
Author(s):  
Alix Michel ◽  
Olivier Clermont ◽  
Erick Denamur ◽  
Olivier Tenaillon
Keyword(s):  
Escherichia Coli ◽  
Ecological Niche ◽  
Infectious Process ◽  
E Coli ◽  
K 12 ◽  
Escherichia Coli Lipopolysaccharide ◽  
Lipopolysaccharide Receptor ◽  
Bacteriophage Phix174

ABSTRACT To determine bacteriophage PhiX174's ecological niche, 783 Escherichia coli isolates were screened for susceptibility. Sensitive strains are diverse regarding their phylogenies and core lipopolysaccharides (LPS), but all have rough phenotypes. Further analysis of E. coli K-12 LPS mutants revealed that PhiX174 can use a wide diversity of LPS structures to initiate its infectious process.

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