Abstract:Resistance to vancomycin permitted detection, in a culture of Streptococcus cremoris 290PC, of a contaminant gram-positive coccus. Morphological and physiological characteristics indicated that this bacterium was a strain of Leuconostoc sp., designated P0184. This strain contained four plasmid species, which were distinct from those harbored by S. cremoris 290PC. Antibiotic disk susceptibility tests indicated that Leuconostoc sp. strain P0184 was also resistant to sulfathiazole and trimethoprim and susceptible… Show more
“…This report extends our knowledge to streptococcal transposons. The genetics of Leuconostoc has, thus far, received less attention, although the presence of plasmid DNA has been reported [16,17]. This study has demonstrated gene transfer by conjugation in this genus.…”
Section: Specificity Of Insertion Of Tn919 In the S Lactis Mg1363 Smmentioning
“…This report extends our knowledge to streptococcal transposons. The genetics of Leuconostoc has, thus far, received less attention, although the presence of plasmid DNA has been reported [16,17]. This study has demonstrated gene transfer by conjugation in this genus.…”
Section: Specificity Of Insertion Of Tn919 In the S Lactis Mg1363 Smmentioning
“…Many of the plasmids display induction for antibiotic resistance, which can also be used to help in selection of altered cells, as was done in the example above. This was also important in one of the first demonstrations of plasmids in the leuconostocs [96], and in an intragenic conjugal transfer between streptococci and leuconostocs [97].…”
Section: Piasmids In Malolactic Bacteriamentioning
“…Early work [31] indicated that most leuconostocs dissimilate citrate but the property may easily be lost in strains kept in the laboratory. The fact that fast lactose metabolism and citrate utilisation in the Lactococcus species are plasmid encoded may lead to conjecture of similarly coded characters in the 'dairy' leuconostocs, particularly as Orberg and Sandine [32] have demonstrated the presence of plasmids in a number of strains and O'Sullivan [33] has found some evidence for plasmid involvement in lactose metabolism.…”
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