We first confirm that the unidentified bacterial species is a gram-positive one, or it has a thick peptidoglycan layer that absorbs the crystal violet stain during the gram staining test. This is because unlike other common bacteria such as Eschericia, Pseudomonas, Shigella and…
Download full paperFile format: .doc, available for editing
Extract of sample "Dichotomus key gram postive bacteria coccus"
Download file to see previous pages
However, so is the gram-(+) Streptococcus and Enterococcus. In fact, they are collectively known as the gram-(+) cocci. Thus, to differentiate them, we use the catalase test, which determines whether an organism is able to convert the toxic hydrogen peroxide into water and oxygen. Of the four main gram-(+) cocci genera, only Staphylococcus and Micrococcus are catalase-(+). We then try to grow it on Mannitol Salt Agar. The genus of Micrococcus is unable to use mannitol for food, and thus will not grow on MSA medium. On the other hand, Staphylococcus is able to grow on MSA because they can oxidize mannitol. Finally, we try to determine whether the unknown is S. aureus or S. epidermidis by growing it on blood agar. Since it did not cause hemolysis, then the organism is S. epidermidis, because S. aureus is a known alpha-hemolytic organism. http://www.mesacc.edu/~aleid84161/personalhomepage/Flow%20Charts.pdf, n.
...Download file to see next pagesRead More
Duration of Ultraviolet Exposure that Kills Bacteria
The law of Arrhenius, which was earlier proposed to be describing temperature reliance of precise reaction speed in chemical reaction, seems not to be properly describing the effects of temperature on the growth of bacterial.
Bacteria were discovered by Anton Von Leeuwenhoek in 1676, which he called animalcules. Louis Pasteur in 1859 discovered that fermentation is an effect of microbial activity. Robert Koch postulated the ‘Germ Theory’ and went on to win the Nobel Prize in 1905.
The author analyzes the importance of accurate identification of bacteria and the necessary materials and methods. He shows newer procedures of rapid identification of bacteria like mass spectrometry and computional analysis, microarray-based identification and other that allow faster and affective method of identifying bacteria and other microorganisms.
The author states that differential media is a method that is utilized to distinguish one microorganism from the next in situations where both are growing in the same medium. Example; Eosin methylene blue is differential for the fermentation of lactose to disperse the individual cells across the medium surface.
Prepare eight nutrient broth cultures by adding 25 ml of nutrient broth to each of eight of the centrifuge tubes. Add a colony of E. coli ATCC 15766 to each of four of the centrifuge tubes. Now add a colony of staphylococcus aureus ATCC 157293 to each of four of the
This essay identifies and critically evaluates the key economic political and technological factors that made it necessary for Turkey to achieve its status as a Rapidly Developing Economy. Further recommendations are also presented in terms of future strategic direction
Before performing the experiment one should have adequate knowledge in staining methods, isolation techniques, microbial nutrition, biochemical characteristics and general characteristics of microorganisms to be able to identify the unknown bacteria. It is vital
4 Pages(1000 words)Lab Report
GOT A TRICKY QUESTION? RECEIVE AN ANSWER FROM STUDENTS LIKE YOU!
Save Your Time for More Important Things
Let us write or edit the lab report on your topic
"Dichotomus key gram postive bacteria coccus"
with a personal 20% discount.