Staphylococcus - spherical bacteria with a diameter of 0.5-1.0 MK. Staphylococci are usually groups - in clusters, sometimes form a short circuit or of Fallot. With the growth in liquid environments form diplokokkovyh form. Staphylococcus immobile spores and capsules do not form. Gram-positive, easy to paint all aniline paints. Staphylococcus - facultative anaerobes, but better grow in aerobic conditions at simple nutrient medium at pH 7.2 - 7.4 and temperature of 35-37 degrees. Pathogenic Staphylococcus emit toxic substances acting on the body,exotoxins and enzymethat destroy penicillin- penicillinase and others are Among the bacteria form spores, staphylococci, are the most resistant to various chemical and physical influences. They tolerate drying, therefore, are a source of dust infections. Heating up to temperature 58-60° kills staphylococci within the hour, and step 3% phenol - through 15-30 minutes Staphylococci quickly develop resistance to antibiotics, particularly to penicillin. Most often the cause Staphylococcus mattery-inflammatory diseases of the skin abscesses, furuncles, carbuncles, phlegmons. With the penetration of staphylococci in the blood they can get in the internal organs and cause septicaemia (see Sepsis). Very often staphylococci cause of foodborne disease (see). Among staphylococci meet saprophytes.