Staphylococcus aureus Virulence Factors

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

Streptococcus pyogenes Virulence Factors

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, […]


Staphylococcus vs. Micrococcus

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

Staphylococcus vs. Streptococcus

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, […]