Staphylococcus

Staphylococcus Streptococci In a healthy human, the internal tissues such as blood, brain, and muscle are generally free of microorganisms. On the other hand, the surface tissues, such as skin, all of the mucous membrane in the mouth, nasal cavity and intestinal tract can easily and readily become available for microorganism to colonize and grow. Depending on the location in the human body, different bacteria choose to grow on a specific location that provides the nutrition it needs, with optimum condition such as pH. There are many different bacteria that collectively are called normal flora, and live in the human body. Many of these bacteria are commensally living in humans, and some others are symbiotic. Commensal bacteria only obtain their food from the human, and do not harm or benefit the host, on the other hand symbiots not only get their food from the host, but in return they also become beneficial to the host in providing nutrition that human can not make, such as vitamin K. One of the most reco! gnized and extensively studied bacteria that often get more attention during the winter is Streptococcus. There are different strains of strep. Depending on their ability of hemolysis of blood agar, strep strep, group, streptococcus, blood, infection, streptococci, bacteria, test, hemolytic, different, called, one, human, common, zone, strains, red, peptidoglycan, often, beta, agar, throat, tests, susceptibility, positive, infected, groups, camp, best, thick, penicillin, each, cells, causes, cases, body