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Staphylococcus intermedius is a Gram-positive, catalase positive member of the bacterial genus Staphylococcus consisting of clustered cocci. Strains of this species were originally isolated from the anterior nares of pigeons, dogs, cats, mink, and horses. Many of the isolated strains show coagulase activity. [2]
Staphylococcus pseudintermedius is a gram-positive spherically shaped bacterium of the genus Staphylococcus [1] found worldwide. [2] It is primarily a pathogen for domestic animals, [ 3 ] [ 4 ] but has been known to affect humans as well. [ 5 ]
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 ]
Staphylococcus haemolyticus is a member of the coagulase-negative staphylococci (CoNS). [2] It is part of the skin flora of humans, [ 3 ] and its largest populations are usually found at the axillae , perineum , and inguinal areas. [ 4 ]
Complete (β) hemolysis on blood agar. Staphylococcus schleiferi is a facultatively anaerobic, coagulase-variable, Gram-positive cocci organism. [1] It is nonmotile and nonspore-forming. [21] When cultured on 5% sheep blood agar, isolates of S. schleiferi form circular, opaque, non-pigmented colonies of approximately 0.8 to 1.0μm in diameter.
Example of a workup algorithm of possible bacterial infection in cases with no specifically requested targets (non-bacteria, mycobacteria etc.), with most common situations and agents seen in a New England setting. Staphylococcus and its main sub-groups is shown near near bottom-center.
Staphylococcus growth in Baird-Parker (BP) agar.. Baird-Parker agar is a type of agar used for the selective isolation of gram-positive Staphylococci species. [1] It contains lithium chloride and tellurite to inhibit the growth of alternative microbial flora, while the included pyruvate and glycine promote the growth of Staphylococci. [1]
This is an example of a positive CAMP test indicated by the formation of dark arrowheads where the Strep group B (Streptococcus agalactiae) meets the Staphylococcus aureus (light-yellow/golden middle streak with surrounding dark hemolysis). Example of a workup algorithm of possible bacterial infection in cases with no specifically requested ...