3. Why is it necessary to make pure subcultures of organisms grown from clinical specimens? So that the organism can be identified and tested for antibiotic sensitivities. 4. What kinds of clinical specimens may yield a mixed flora in bacterial cultures?
Pseudomonas Aeruginosa The purpose of this lab was to identify the unknown bacteria culture given by our respected instructor using various differential tests. The identification of this unknown culture was accomplished by separating and differentiating between possible bacteria based on specific biochemical characteristics. Each test was used in a way to help recognize those specifics and bring us one step closer to identify the unknown cultures. The differential tests used to identify the unknown cultures were oxidase, lactose and glucose fermentation, citrate, indole, urease, motility, H2S, EMB and MAC. The tests performed on the unknown bacteria culture were all used to determine and identify the bacteria.
Variables: Experimental Control: LB plate. Because it has nothing on it. Manipulated Variable: pBlu plasmid DNA Responding Variable: If the bacteria is blue. Controlled Variables: Petri plates, clean lab station, water temperature. Data: Type of dish | Drawing of dish | My growth
After that, I placed the slide under the microscope and began searching for the cells that were on the slide. Method: Fish Cells First I chose a slide with fish cells on it, then I placed it under the microscope. I then began searching for the different stages of mitosis in the cells. I then took pictures of the slide, and drew pictures of the the different stages of mitosis. Conclusion In conclusion, after learning to make a cheek cell slide and viewing both the cheek cells and the fish cells in the microscope, I could identify the stages of mitosis.
C) The average size of a bacteria is between the diameter of 0.5 to 5 µm. A bacteria reproduces asexually. The cell divides by binary fission, the DNA replicates itself and then they are divided into two identical cells. Some bacteria make their own food and some rely on a supply of ready made food. VIRUS A) labelled B) Viruses are not cells and are not made from cells.
Identify the differences between bacteria, viruses, fungi and parasites Answer: Bacteria Bacteria are single-cell microorganisms which generally exist in large numbers and are microscopic in size. Bacteria can be either beneficial (bacteria in the intestinal tract aid digestion and are part of the normal body flora) or can be the cause of disease (for example pneumonia, food poisoning or bacterial meningitis). Viruses A virus is an infectious agent which can only live and replicate inside organism cells. The main difference between viruses and bacteria is that they are unable to reproduce in food – they need a living host cell to replicate. They replicate by infecting and taking over the functions of the host cell.
Causes and Spread of Infection The differences between Bacteria, viruses, fungi and parasites are Bacteria are found everywhere ie, air, water, soil, animals, people and food. It is a single cell micro-organism that retrieves its nutrition from the environment. Bacteria can only be seen through a microscope. They are shaped like short rods, spheres or spirals. It is stated on www.biologyinfo.com that, “Not all bacteria are harmful.
Aims of the course: Review the molecules and structures of the cell envelope of bacterial cells and describe the roles played by each of the major components. Discuss briefly the features and structures of the cell well that are targets for current drugs and those which offer new targets for
That’s why it’s so important to wash your hands or use hand sanitizer, it grows in numerous places. Also bacteria cells do not contain a cell nucleus and rarely harbor membrane-bound organelles, unlike eukaryotes which they all contain a nucleus. Bacteria has a wide range variety of metabolic types and that is how they are defined using their taxonomy, the three different types are phototrophs (sun light), litotrophs (inorganic compounds), and organotrophs (organic compounds). In the lab we tested our very own bacteria off of our tongue and smeared it on a blood agar plate, sheep blood to be exact. We collect the bacteria from the inside of the mouth and grow them in specially prepared petri dishes.
Additionally, they examine the carcass for a cause of death. These are also known as biopsies or necropsies. They do this by using a microscope and other specialized equipment. In Veterinary Pathologists, the author states that Veterinary pathologists must “interact with and advise lab personnel in proper specimen handling and handling techniques.” (“Veterinary Pathologist”) Additionally, they will have to practice and promote ethical laboratory procedures. In conjunction with this, DVM’s must discuss study results with clients, and quite possibly develop a plan for further testing.