1. normal microbiota
These bacteria live on human skin and can also be found in the mucous membranes. They have many beneficial uses including easing the maturation of the immune system, help with digestion, fight other bad bacteria, and destry various toxins in our body. The normal microbiota is only beneficial when they are in the right place and if the human has a strong enough immune system to support them. If this bacteria was found in an area they are not usually in, the human could get sick from it, especially if it's able to penetrate it's weak immune system.
2. Lacto bacilli
This bacteria is mainly important to females because it is found in the vagina. The lacto bacilli bacteria almost immediately appear in the vagina after the baby girl is born. It takes the place of other bacteria before they could inhabit the vagina. They make that area acidic enough so that other harmful bacteria cannot penetrate it. When the baby grows up to a young lady, but before she reaches puberty, other bacteria will be taking the place of this and making it acidic. But after puberty, the lactobacilli will be able to inhabit it again.
3. Staphylococcus Epidermidis
As a member of the normal microbial flora groups, this bacteria is also vital to humans. It's found usually on the outermost layer of the human skin, if not really close to it. Sometimes, it is in the hair follicles, ready to be in action if the skin is washed. The staphylococcus Epidermidis is the first layer of defense against various bacteria and germs that human come in contact with daily. These bacteria are so small and are able to cover so much surface area at once that they make up about 10,000 to 100,000 on each square centimeter of skin.
resource used (for information)
resources for pictures:
http://www.google.com/imgres?hl=en&biw=670&bih=559&gbv=2&tbm=isch&tbnid=39e9h7Yxp01yLM:&imgrefurl=http://www.niaid.nih.gov/LabsAndResources/labs/aboutlabs/lhbp/pathogenMolecularGeneticsSection/Pages/otto.aspx&docid=dML8dWYWnLlzGM&imgurl=http://www.niaid.nih.gov/SiteCollectionImages/labs_scientific/labs/aboutlabs/lhbp/staphylococcus_epidermidis.jpg&w=300&h=390&ei=HwoNT7eDJ-ihiQLv0IjqAw&zoom=1&iact=hc&vpx=125&vpy=162&dur=366&hovh=166&hovw=150&tx=115&ty=250&sig=114823444161963020132&page=1&tbnh=166&tbnw=150&start=0&ndsp=6&ved=1t:429,r:3,s:0http://www.google.com/imgres?num=10&um=1&hl=en&client=firefox-a&hs=CoV&rls=org.mozilla:en-US:official&biw=670&bih=559&tbm=isch&tbnid=7HHrlGWhRcAmhM:&imgrefurl=http://en.wikipedia.org/wiki/Lactobacillus&docid=pDMXRbBflOKWyM&imgurl=http://upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Lactobacillus_sp_01.png/240px-Lactobacillus_sp_01.png&w=240&h=191&ei=5AkNT9AZoqiIAtiz1Y8E&zoom=1&iact=hc&vpx=139&vpy=213&dur=1511&hovh=152&hovw=192&tx=71&ty=89&sig=114823444161963020132&sqi=2&page=1&tbnh=148&tbnw=190&start=0&ndsp=6&ved=1t:429,r:0,s:0http://www.google.com/imgres?um=1&hl=en&client=firefox-a&hs=rSq&sa=N&rls=org.mozilla:en-US:official&biw=670&bih=559&tbm=isch&tbnid=tJZko2jB_sFHNM:&imgrefurl=http://classes.midlandstech.edu/carterp/Courses/bio225/chap01/ss5.htm&docid=N_KNLh3SLJeKmM&imgurl=http://classes.midlandstech.edu/carterp/Courses/bio225/chap01/01-07_MouthMicrobio.jpg&w=719&h=603&ei=vAkNT6StG4qViALeir3xAw&zoom=1
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