Classification. S aureus and S intermedius are coagulase positive. All other staphylococci are coagulase negative. They are salt tolerant and often hemolytic. What is coagulase negative Streptococcus? Coagulase-negative staphylococci (CoNS) are a type of staph bacteria that commonly live on a person’s skin. Doctors typically consider CoNS bacteria harmless whenRead More →
Diseases Caused by Streptococci. The most significant streptococcal pathogen is S. pyogenes, which is beta-hemolytic and in Lancefield group A and is thus denoted as group A beta-hemolytic streptococci (GABHS). ) sometimes occur ≥ 2 weeks after infection. Is Streptococcus an opportunistic bacteria? Streptococcus pyogenes (also known as group ARead More →
Four serotypes (19A, 6, 3, 23F) of S. pneumoniae accounted for 55.7% of both sets of strains isolated from nasal carriage and clinical samples. Serotype 19A was the most common serotype among both groups. Why is it important that we know the serotype of Streptococcus pneumoniae? In invasive pneumococcal diseaseRead More →
Domain: Prokaryotes. Kingdom: Bacteria. Phylum: Firmicutes. Class: Bacilli. Order: Lactobacillales. Family: Streptococcaceae. Genus: Streptococcus. Species: Streptococcus pyogenes. How do you identify Group A Streptococcus? To identify S. pyogenes in clinical samples, blood agar plates are screened for the presence of β-hemolytic colonies. The typical appearance of S. pyogenes colonies afterRead More →