Microbiology Research Paper

6879 Words28 Pages
Melissa Babajko
Microbiology 214BA
Dr. May
June 6, 2012

Staphylococcus aureus- Is a facultative anaerobic, Gram-positive, salt positive, cocci shaped bacterium. Staphylococcus aureus is found as normal part of the skin floral in the nasal passages and on the skin. An estimated twenty percent of people naturally have harmless Staphylococcus aureus on their skin and are long-term carries for Staphylococcus aureus. Staphylococcus aureus is the most common strand of Staphylococcus in humans to date, spread through skin to skin contact or even skin to object contact that an a person infected with Staphylococcus aureus has touched. Staphylococcus aureus is coagulase positive, which induces clumping of the cells and of the blood. Staphylococcus
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(http://www.ncbi.nlm.nih.gov/pubmed/22621239) PMID: 22621239 [PubMed - as supplied by publisher] May 2012

Streptococcus pneumoniae- Is a Gram-positive bacterium in the shape of a slightly pointed cocci. They are usually found in pairs as diplococci. Streptococcus pneumoniae are alpha hemolytic bacterium. Streptococcus pneumoniae have a polysaccharide capsule that acts as a virulence factor for the organism; along with surface proteins that prevent the activation of complement pathways, and pili that enable S. pneumoniae to attach to epithelial cells in the upper respiratory tract. Streptococcus pneumoniae lacks catalase and ferments glucose to lactic acid, like most other streptococci. However, unlike most other streptococci, it does not display an M protein and it hydrolyzes insulin, which help distinguish it from other streptococci. Streptococcus pneumoniae is the most common cause of meningitis in adults and young adults throughout the world and is best known for causing pneumonia all other the world.

Research Study: Due to a continuing increase in S. pneumoniae's antibiotic resistance, the search for a better vaccine is ongoing. Research on the Lactococcus lactis bacteria for use as a vaccine is promising; its production of the pneumococcal surface protein PspA makes it a good candidate for a mucosal vaccine, which could be administered through the nose instead of an injection (a
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