Final answer:
Julie uses selective and differential media to characterize cheese samples in the lab. Foodborne illnesses can be caused by various microorganisms found in raw milk and dairy products. A common source epidemic occurs when many people get sick from a single contaminated food source.
Step-by-step explanation:
In her inspection, Julie took samples of cheeses back to the health department laboratories to ensure their safety. To characterize the samples, she may use selective and differential media for inoculation. These media can help identify specific carbohydrates and detect the presence of certain enzymes. Some common microorganisms found in raw milk and dairy products, such as Listeria monocytogenes, can cause foodborne illnesses.
Foodborne illnesses can be caused by the consumption of contaminated food, leading to symptoms like vomiting and diarrhea. In a common source epidemic, many individuals get sick from a single food source. There are over 250 characterized foodborne illnesses caused by various microorganisms like Salmonella enterica, E. coli, and Toxoplasma gondii.