Bacteria in Frozen Yogurt Christopher M. LoBue Background Bacteria are all around us. These organisms are small enough that even the largest bacteria can only be seen by high-powered microscopes, and most require electron microscopes to view. Bacteria are grouped with the blue-green algae in the kingdom Monera.
Some bacteria are harmful to humans.
Some well-known pathogenic bacteria are those of genera Salmonella, Streptococcus, and Staphylococcus. Many of the harmful bacteria are the kind which cause food to spoil. One type of food particularly susceptible to spoilage is milk. Milk contains a number of amino acids which bacteria need to survive. Microorganisms in milk multiply rapidly.