Lahela Correa 12/08/2009 Microbiology 140 Matthew Tuthill Unknown Lab Report
Introduction There are many reasons for knowing the identity of microorganisms. The reasons range from knowing the causative agent of a disease in a patient, so as to know how it can be treated, to knowing the correct microorganism to be used for making certain foods or antibiotics. This study was done by applying all of the methods that I have been learned so far in the microbiology laboratory class for the identification of an unknown bacterium. The purpose of this lab was to identify two unknown bacteria cultures using various differential tests. The identification of these unknown cultures was accomplished by separating and differentiating possible…show more content… Production of this compound will cause a reaction to occur with ferrous sulfate and will result in the production of a black precipitate. Thus, the culture is positive for H2S production if a black precipitate is seen and negative if one is not observed. The yielding results after incubation was (A/A) for gram (-) bacteria and (K/K) for gram (+) bacteria, there were no black precipitate present in either tubes.
Gamma Other Staph. Saprophyticus Staph. Aureus Micrococcus roseus Staph. Epidermidis
TSI (k/k)
Negative Positive
Micrococcus roseus Staph. Saprphyticus
Urease (Negative) / Bacitracin (S)
Micrococcus roseus
Unknown 126- Micrococcus roseus
Conclusion: With multiple differential and biochemical test runned on the unknown 126 I was able to single out the bacteria which lead to Micrococcus roseus. After running the test and observing the results I believe
Finding my Unknown in a Sea of Unknowns Unknown “D” Ryan Hoover April 30, 2014 Ms. B Microbiology Spring 2014 There are many different reasons for finding the name of a microorganism. The reasons to find the name range from finding out what the microorganism does and to research and develop a cure for a harmful microorganism, to knowing the correct microorganism when used for foods or medicines. This study included all of the tests and results that have been learned in the microbiology…
Antibiotic Resistance and Gram Staining of Unknown Bacterial Samples Microbiology Lab July 1, 2013 Abstract: In this final laboratory assignment, each student was given an agar plate. Each plate was swiped with a pure culture bacteria sample. Where the sample came from and what kind of bacteria was unknown to the students. We were asked to observe the colony morphology on our plates and to perform the antibiotic sensitivity/resistance test. The plates were put into a 37° incubator oven…
Course Description Laboratory experience with brightfield microscopy; aseptic and pure culture techniques; staining and observation of microorganisms; identification of unknown bacteria; environmental influences and control of microbial growth; antibiotic sensitivity and resistance; bacterial examination of water; medical microbiology. Credit Hours: 2 Prerequisite(s): Credit or concurrent registration in BIOS 350. Laboratory: Science and Engineering Laboratories-East (SEL-E), Room 3083…
bringing them into the lab have for our view of microbial growth in nature? Does not represent the true strains that are present in nature.... Gives us a false idea Luckinbill (Science 202:1201-1203; 1978) (First work on R and K selection) Rock/Paper/Scissors Colicin (bacteriocin - narrow spectrum antibiotic) WT: S Colicin producing strains (C) outcompete non-producers/sensitive strains (S) Colicin resistant strains (R) outcompete colicin producers Non-producers/sensitive strains(S)…
these trash “islands”. This accumulated trash has become so massive that currently the Easter Garbage Patch is nearly twice the size of Texas and located just east of Japan all the way to just west of Hawaii. How large these vortexes will become is unknown, as they…
COMMENTARY Aseptic Processing Contamination Case Studies and the Pharmaceutical Quality System Richard L. Friedman Food & Drug Administration, Center for Drug Evaluation & Research, Division of Manufacturing & Product Quality ABSTRACT: This paper summarizes parenteral drug contamination case studies presented at industry conferences and a Food and Drug Administration advisory committee meeting in the period of 2000-2004. CGMP deficiencies associated with each contamination event are discussed. The…