Gram Positive Cocci

Gram-positive cocci and diseases

Name of Gram-positive cocci Diseases
Staphylococcus aureus Surgical-site infections, skin infection, hospital-acquired pneumonia, osteomyelitis, toxic-shock syndrome, necrotizing fasciitis, food-poisoning, infective arthritis
Streptococcus pyogenes Acute pharyngitis (strep-sore throat), impetigo, erysipelas, necrotizing fasciitis, myositis,
Streptococcus pneumoniae Bacterial pneumonia, meningitis, otitis media, sinusitis, bronchitis, bacteremia, scarlet fever, rheumatic fever, post-streptococcal glomerulonephritis, and streptococcal toxic shock syndrome
Streptococcus agalactiae Postpartum infection and neonatal sepsis
Enterococcus faecalis Urinary tract infections, bacteremia, ocular infections, mitral valve endocarditis, meningitis (rarely)

Bacteriology

Staphylococcus aureus Virulence Factors

Acharya Tankeshwar 2

Last updated on May 30th, 2021Staphylococcus aureus is a notable human pathogen for a variety of infections; suppurative (pus-forming) infections, systemic illness and toxinoses. S. aureus has an extraordinary repertoire of virulence factors that allows […]

Virulence factors of S. pyogenes
Bacteriology

Streptococcus pyogenes Virulence Factors

Acharya Tankeshwar 1

Last updated on June 14th, 2021Streptococcus pyogenes is the leading cause of uncomplicated bacterial pharyngitis and tonsillitis commonly referred to as strep throat. Acute diseases associated with Streptococcus pyogenes occur chiefly in the respiratory tract (sinusitis, otitis), bloodstream (sepsis, endocarditis, meningitis), or theskin (impetigo, […]

Bacteriology

Staphylococcus vs. Micrococcus

Acharya Tankeshwar 8

Last updated on June 11th, 2021Staphylococcus and Micrococcus both are Gram-positive cocci (GPC).  Both of these cocci are non-motile, non-sporing, and catalase positive. Both of these organisms are normal flora of the skin and mucous membranes […]

Gram positive cocci in clusters
Bacteriology

Staphylococcus vs. Streptococcus

Acharya Tankeshwar 4

Last updated on June 11th, 2021Staphylococcus and Streptococcus are the two most common pathogenic gram-positive cocci of medical importance. They share some of the important properties. Common characteristics shared by these gram-positive cocci are: Nonmotile, […]