Download Guided BIOS 242 Week 3 Lab 3 The Gram Stain Identify and differentiate bacteria
Learning Outcomes
- Describe the structure of the Gram-positive and Gram-negative
- Identify theoretical and technical aspects of the Gram staining
- Identify the most commonly made mistakes in Gram
- Analyze the results of a Gram staining experiment using a light
About the Gram Stain: Identify and differentiate bacteria Virtual Simulation Lab
Did you know that there are approximately 5 million-trillion-trillion bacteria in the world? Most of them are harmless, but some can induce disease in an affected host. In this simulation, you will help doctors identify bacteria in a cerebrospinal fluid sample from a patient suspected of suffering from bacterial meningitis.
Explore the bacterial cell wall
Compare and contrast the cell wall of Gram-positive and Gram-negative bacteria by building your very own bacterial 3D models on the hologram table. Enter the exploration pod to observe in an immersive animation how the four reagents of the Gram stain interact with structural components of the cell wall to color the bacteria.
Perform the gram stain
When the patient’s fluid sample arrives at the laboratory, equip yourself with protective gear to prepare a bacterial smear and heat-fix it to a glass slide. You are now ready to perform the Gram stain in a safe virtual environment. Made a mistake? No worries, hit the big red button on the workbench to repeat the staining procedure until it becomes second nature.
Interpret your findings using a microscope
In the end, you will use a light microscope to interpret the results of your Gram stain. View the microscopic image on the computer screen, and apply immersion oil to increase magnification 1000x! Will you be able to identify the presence of any bacteria in the patient´s cerebrospinal fluid?
Questions:
- Purpose: Please describe in complete sentences and in your own words, the purpose of this
- Complete the following table by predicting the colors of bacteria with- and without cell walls as they are … through the steps of Gram
- A fellow student showed you a gram … slide where cells containing thick cell walls were stained pink. What would you tell her about the staining procedure? Why?
- A fellow student showed you a gram … slide where cells containing LPS were stained purple. What would you tell her about the staining procedure? Why?
- Reflection: Write 5 sentences on what you learned from this What did you like and what was something that you would prefer not to be a part of this simulation?
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