Fluid Thioglycollate Broth Post-Lab Worksheet Notes

Post-Lab Worksheet Guide for Exercise 2-7: Fluid Thioglycollate Broth

Header Information

  • Date: 7-2023
  • Name: [Insert Name]
  • Section: [Insert Section]

Observations

Pre-Incubation Observations
  • Environmental Unknown:
    • Document and describe any visible bacteria before incubation.
    • If none are present, clearly state so.
Post-Incubation Observations
  • Draw Diagram:
    • Create a diagram showing the growth in the Fluid Thioglycollate Broth after incubation.
    • Include the precise location of the growth within the medium.
  • Growth Assessment:
    • Indicate the amount of growth in the broth using one of the specified categories:
    • Good
    • Fair
    • Poor
    • No Growth

Conclusions

Questions
  1. Purpose of the Indicator in Fluid Thioglycollate Medium:
    • Provide a detailed explanation of the role of the indicator in the medium, emphasizing its importance in reflecting the environmental conditions regarding oxygen levels.
    • Specifically note how it assists in identifying the oxygen tolerance of the microorganisms being cultured.
  2. Name of the Indicator:
    • State the specific name of the indicator used in the Fluid Thioglycollate Broth.

Additional Information

  • Unknown Sample Number: [Insert Sample Number]
  • Oxygen Tolerance Classification:
    • Record the classification of the unknown sample's oxygen tolerance based on observations from the fluid thioglycollate broth results. This could include categories such as:
    • Obligate Aerobe
    • Facultative Anaerobe
    • Obligate Anaerobe
    • Microaerophilic
    • Aerotolerant Anaerobe

Note:

  • Ensure to use uninoculated controls for comparative analysis against the incubated media in the various categories under observation.
  • Draw attention to any discrepancies observed between inoculated samples and the controls in terms of growth and indicator activity.