Alpha, beta and gamma hemolysis

Blood Agar Plates---This website discusses the history of blood agar plates and hemolysis protocols. This picture also displays the different types of growth in a blood agar plate; beta, alpha, and gamma.

Pseudomonas aeruginosa on blood agar.  Note the metallic sheen and ground glass appearance.  Depending on who you are it can smell like grapes, new shoes, or dirt.  To me it smells like new shoes.  One of the friendlier smells in the micro lab.

Pseudomonas aeruginosa on blood agar. Note the metallic sheen and ground glass appearance. Depending on who you are it can smell like grapes, new shoes, or dirt. To me it smells like grapes. One of the friendlier smells in the micro lab.

Obligate aerobes, obligate anaerobes, faculative anaerobes, aerotolerant anaerobes, microaerophiles

Obligate aerobes, obligate anaerobes, faculative anaerobes, aerotolerant anaerobes, microaerophiles

Gram Stain w/ a few potential bacteria seen. Not shown - Streptococcus spp. = chains

Gram Stain w/ a few potential bacteria seen. Not shown - Streptococcus spp.

hemolysis microbiology test - Google Search

Because sometimes you need to do a sheep blood agar test. This sheep blood agar plate shows Beta, alpha and gamma hemolysis.

Colony morphology of four bacteria: E.coli (Gram-negative rods), P.aeruginosa (Gram-negative rods), S.aureus (Gram-positive cocci; colony surrounded by a zone of beta-hemolysis) and S.epidermidis (Gram-positive cocci) on blood agar.

Colony morphology of four bacteria: E.coli (Gram-negative rods), P.aeruginosa (Gram-negative rods), S.aureus (Gram-positive cocci; colony surrounded by a zone of beta-hemolysis) and S.epidermidis (Gram-positive cocci) on blood agar.

Alpha & Beta Receptors

A nice (probably incomplete) chart of what common neurotransmitters do, where you can find them, and what sort of receptors they bind to.

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