Depolarizationof the axon hillock to threshold results in the generationand propagation of an action potential. The action poten-tial is a transient change in the membrane potential charac-terized by a gradual depolarization to threshold, a rapid ris-ing phase, an overshoot, and a repolarization phase.
Ecology. Staphylococcus aureus is a normal inhabitant of the skin and mucous membranes in the nose of a healthy human, while S. epidermidis inhabits only the skin of healthy humans. S. aureus is infectious to both animals and humans.he Staphylococcus aureus genome, which is the most common species amoung the genome projects, is about 2.8 Mega-base pairs long with approximately 2,600 open reading frames, comprising 84.5% of the genome.
Staphylococcus (STAFF-ih-low-KOCK-us) aureus (ARE-ee-us) is a type of bacteria, or germ. These bacteria are often called âstaph.â Staph bacteria can live in the nose and on the skin.1 in 5 people have these bacteria. In most cases, Staph bacteria cause no infection.But in some people, Staph can cause serious infections such as pneumonia, wound infections, and blood infections. Methicillin (meth-ih-SILL-in) is an antibiotic often used to treat Staph infections.When Staph is âmethicillin resistant,â most antibiotics cannot kill the bacteria. Methicillin-resistant staphylococcus aureus bacteria are called âMRSAâ for short.n most cases, Staph bacteria cause no infection. But in some people, Staph can cause serious infections such as pneumonia, wound infections, and blood infections. Methicillin (meth-ih-SILL-in) is an antibiotic often used to treat Staph infections.