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Unformatted text preview: Jones 1 Micro 305 March 16, 2007 Lab Report 2: Unknown Literature Review Bacteria are found nearly everywhere on this planet. Not all of them, however, are harmful (or pathogenic) bacteria. Most are essential to most other forms of life. In this lab, students were given a mixture of two bacteria and asked to isolate and identify which types of bacteria they were in the sample. After isolating the bacteria and performing certain tests, I found that the sample given to me (Unknown #88) consisted of the Gram- positive bacteria, Micrococcus luteus , and the Gram-negative bacteria, Proteus vulgaris . M. luteus can be found in many places, such as the human skin, water, dust, and soil. It is generally thought of as harmless bacterium, but it has been the cause of rare cases of infections in people with compromised immune systems, such as those with HIV. The bacteria are gram positive cocci. M. luteus on human skin breaks down compounds in sweat into compounds with bad odor. It can also grow well in environments with little water or high salt concentrations (MicrobeWiki). The genus Proteus is small, Gram-negative rods and facultative anaerobes: they ferment sugars in anaerobic conditions but can use a wide range of organic molecules in aerobic...
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- Spring '07