Every person has bacteria that inhabit the skin and other body parts. Most of the bacteria are normal and not harmful to the individual. Certain types of bacteria inhabit different parts of the body because of the different resources the environment offers for the various bacteria. There are bacteria that thrive in the skin folds of humans because the moisture level and there is also a high salt level there, for example. The normal flora are opportunistic, and they need a way of entry in order to be harmful to the individual. Neisseria, Staphylococcus aureus, and Streptococcus are examples of bacteria that if given the opportunity can be harmful to humans. Growing the bacteria, gram staining and performing an oxidase test can be done…show more content… Bacteria such as Neisseria and Streptococcus, located in throats, can cause necrotizing fasciitis, strep throat, streptococcal toxic shock syndrome, and other diseases. The inner part of the nose and the back of the throat of a group member were swabbed in this experiment, in order to see if the bacteria Neisseria or Streptococcus were present in these locations. The features that make it easy to identify these two types of bacteria are that an oxidase test can be done for the Neisseria bacteria and using a blood agar to identify beta hemolytic species of the Streptococcus. Using the agar plates, the colonies were put through a few tests to see if the bacteria grown was the wanted pathogens or not. A prediction that Staphylococcus aureus would not be found in the nose of the group member, because many people do not possess this certain bacteria as a part of their normal microbiota, and that it would be expected to find the bacteria Neisseria and Streptococcus in throat. The throat is exposed to two places of entry, the nose and the mouth. These two openings allow for more bacteria to enter.
Materials and Methods
Exercise 11 A sterile cotton swab is dipped in the saline and then pressed against the side of the tube to remove the excess liquid. Then, it was rubbed against the designated part of the skin, the arm, and then the Mannitol salt agar plate was streaked with the swab. The swab was then placed in