Staphylococcus aureus
Staphylococci (staph) are a gram-positive, spherical bacterium that is versatile and dangerous to humans. Staphylococcus comes from the Greek word staphyle meaning “a bunch of grapes” which is what it appears to look like under a microscope. Staphylococcus aureus (yellow) is in the family of Staphylococcaceae, which includes three genera, Gamella, Macrococcus and Salinicoccus. The most known of its nearby phylogenetic relatives are the members of the genus Bacillus in the family Bacillaceae, which is on the same level as the family Staphylococcaceae. The bacteria can cause damage to the skin or other injury may occur leading to overcoming of the natural skin barrier turning into infection. Skin infections are the most common disease by S. aureus. It is contagious and can be transmitted from person to person through direct contact. It is unnecessary to have lab tests to diagnose the infection as it can be determined by its appearance. I chose this specific bacterium because I have known people who have had a staph infection before and I was curious to do more research on it.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2631711/pdf/11294701.pdf
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