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Staphylococcus saprophyticus; S. saprophyticus on Mueller–Hinton agar exhibiting resistance to novobiocin characteristic for species identification Gram stain of a Gram positive S. saprophyticus sample suspension, lab cultured on Tryptic Soy agar (TSA) Scientific classification; Domain: Bacteria: Phylum: Bacillota: Class: Bacilli: Order ...
β-haemolytic colonies of Streptococcus agalactiae, blood agar 18h at 36 °C Positive CAMP test indicated by the formation of an arrowhead where S. agalactiae meets Staphylococcus aureus (white middle streak) Red colonies of S. agalactiae in granada agar, vagino-rectal culture 18h incubation 36 °C anaerobiosis
Gram stain (Gram staining or Gram's method), is a method of staining used to classify bacterial species into two large groups: gram-positive bacteria and gram-negative bacteria. It may also be used to diagnose a fungal infection. [1] The name comes from the Danish bacteriologist Hans Christian Gram, who developed the technique in 1884. [2]
Group A streptococcal infections are a number of infections with Streptococcus pyogenes, a group A streptococcus (GAS). [1] S. pyogenes is a species of beta-hemolytic Gram-positive bacteria that is responsible for a wide range of infections that are mostly common and fairly mild. If the bacteria enters the bloodstream, the infection can become ...
The hemolysis of some weakly beta-hemolytic organisms is enhanced when streaked close to certain beta hemolytic strains of Staphylococcus aureus. This phenomenon is the mechanism behind the CAMP test, [2] a test that was historically used for the identification of Streptococcus agalactiae and Listeria monocytogenes. [3]
Streptococcus is a genus of gram-positive or spherical bacteria that belongs to the family Streptococcaceae, within the order Lactobacillales (lactic acid bacteria), in the phylum Bacillota. [2] Cell division in streptococci occurs along a single axis , thus when growing they tend to form pairs or chains, which may appear bent or twisted.
Staphylococcus species are facultative anaerobes (capable of growth both aerobically and anaerobically). [15] All species grow in the presence of bile salts. All strains of Staphylococcus aureus were once thought to be coagulase-positive, but this has since been disproven. [16] [17] [18] Growth can also occur in a 6.5% NaCl solution. [15]
Staphylococcus epidermidis is a Gram-positive bacterium, and one of over 40 species belonging to the genus Staphylococcus. [1] It is part of the normal human microbiota, typically the skin microbiota, and less commonly the mucosal microbiota and also found in marine sponges. [2] [3] It is a facultative anaerobic bacteria.