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.
By Dr Ananya Mandal, MD. Staphylococcus aureus (S. aureus) is one of the leading causes of infections acquired in the community and after surgery or hospital. Around 30% of individuals carry S. aureus in their nose, pharynx or back of throat and on their skin.Photograph depicted a cutaneous abscess, which had been caused by methicillin-resistant Staphylococcus aureus bacteria, referred to by the acronym MRSA.. aureus causes numerous infections at various sites of the body. Some of these include: 1  Skin infections â S. aureus causes boils, furuncles, styes, impetigo and other superficial skin infections in humans.