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The Enterococcaceae are a family of Gram-positive bacteria placed in the order Lactobacillales. [1] Representative genera include Enterococcus, Melissococcus, Pilibacter, Tetragenococcus, and Vagococcus. In this family are some important lactic acid bacteria which produce lactic acid as the major metabolic end product. [1]
Enterococcus is a large genus of lactic acid bacteria of the phylum Bacillota.Enterococci are Gram-positive cocci that often occur in pairs or short chains, and are difficult to distinguish from streptococci on physical characteristics alone. [2]
E. faecalis is usually resistant to many commonly used antimicrobial agents (aminoglycosides, aztreonam and quinolones). [15] The resistance is mediated by the presence of multiple genes related to drug resistance in the chromosome or plasmid. [3] Resistance to vancomycin in E. faecalis is becoming more common.
Enterococcus faecium has been a leading cause of multi-drug resistant enterococcal infections over Enterococcus faecalis in the United States. Approximately 40% of medical intensive care units reportedly found that the majority, respectively 80% and 90.4%, of device-associated infections (namely, infections due to central lines, urinary drainage catheters, and ventilators) were due to ...
Melissococcus is a genus of Gram-positive, catalase-negative, coccus-shaped lactic acid bacteria within the family Enterococcaceae. Melissococcus species were classified as Streptococcus until 1983 when Melissococcus was recognized as a distinct genus. [3]
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Enterococcus gallinarum is a species of Enterococcus. [3] E. gallinarum demonstrates an inherent, low-level resistance to vancomycin.Resistance is due to a chromosomal gene, vanC, which encodes for a terminal D-alanine-D-serine instead of the usual D-alanine-D-alanine in cell wall peptidoglycan precursor proteins. [4]
[3] [4] Additionally, this species uses Camelus dromedarius and Helix pomatia as hosts. [ 5 ] Sequencing of the CX012922 strain show genes divided between a 2.83 Mb circular genome for virulence factors like ATP-binding cassette (ABC) transporters and a 0.98 Mb circular megaplasmid for substrate utilization enzymes like raffinose permease.