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  • Viridans streptococci - Wikipedia
    The viridans streptococci are a large group of commensal streptococcal Gram-positive bacteria species that are α-hemolytic, producing a green coloration on blood agar plates (hence the name "viridans", from Latin "vĭrĭdis", green), although some species in this group are actually γ-hemolytic, meaning they produce no change on blood agar [1]
  • What is Streptococcus Viridans: Causes, Symptoms, Treatment
    Streptococcus Viridans or the Viridans group streptococci or VGS, are a diverse range of organisms in the genus of Streptococcus, which are known for greening of the blood in the blood agar, where they are grown normally
  • Antibiotic susceptibility patterns of viridans group . . .
    Viridans group streptococci (VGS) are typically part of the commensal flora but can also cause severe invasive diseases such as infective endocarditis There are limited data available showing antibiotic susceptibility over time for VGS
  • Streptococcus species | Johns Hopkins ABX Guide
    Usually yield α-hemolysis on blood agar (green surrounding colony - hence name, viridans); may be β-hemolytic or non-hemolytic (latter sometimes termed γ-hemolysis) Lactococci: generally not human pathogens Enterococci: see separate module Streptococcal-like, catalase-negative, Gram-positive cocci
  • Viridans streptococci - an overview | ScienceDirect Topics
    Viridans streptococci are commensals in the gastrointestinal, respiratory and female genital tracts and are most prevalent in the oral cavity They are considered to be of low pathogenicity, apart from their propensity to adhere to cardiac valves and cause endocarditis
  • Streptococcus viridans: Video, Causes, Meaning - Osmosis
    Streptococcus viridans is a group of gram-positive, alpha-hemolytic streptococci that is commonly found in the oropharynx, epithelial surfaces of the oral cavity, teeth, skin, the gastrointestinal and genitourinary tract of humans
  • Viridans Streptococci: Pathogenesis and Lab Diagnosis
    The viridans streptococci are important Gram-positive cocci comprising a large group of bacteria These are found as mouth commensals, causing minor to life-threatening diseases The word viridans has been derived from the Latin word Viridis as most species of this group gives green color due to alpha hemolysis (partial hemolysis) on blood agar
  • Strep Viridans in UTIs: Characteristics, Pathogenesis . . .
    Urinary tract infections (UTIs) are commonly associated with pathogens like Escherichia coli, but other bacteria can also be culprits Among these is a group known as Strep Viridans, typically recognized for their role in oral and respiratory flora
  • Streptococcal Infections - Infectious Diseases - Merck Manual . . .
    Beta-hemolytic streptococci produce zones of clear hemolysis around each colony Alpha-hemolytic streptococci (commonly called viridans streptococci) are surrounded by green discoloration resulting from incomplete hemolysis Gamma-hemolytic streptococci are nonhemolytic
  • Its Not Easy Being Green: the Viridans Group Streptococci . . .
    The viridans group streptococci (VGS) are a heterogeneous group of organisms that can be human commensals, colonizing the gastrointestinal and genitourinary tracts in addition to the oral mucosa VGS are generally considered to be of low pathogenic potential in immunocompetent individuals





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