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The Living World of Yogurt

Yogurt offers a non-pathogenic system in which to study microbial growth and metabolism. How do you estimate how many bacteria there are in a container of commercial yogurt? What are the effects on bacterial growth in  fermenting yogurt with changes in pH, temperature, or substrate availability? You can even do the lab safely at home. Data from experimental runs are available for analysis.

  • analyze serial dilution data from a living yogurt culture

Topic(s): Cell/Metabolism, Industrial/Food

Download Resources for this Module


Coleman, Koch's Postulates.pdf
Living World Of Yogurt.pdf
Table 1 - Serial Dilution.pdf
Table 2 - no nutrients.pdf
Table 3 - With nutrients.pdf
Yogurt data




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