d. Salmonella, Listeria monocytogenes, and Escherichia coli do not grow.
At a pH of 2.9, all three types of bacteria fall outside of their optimal pH ranges for growth. Acidic conditions like pH 2.9 would likely inhibit their growth and survival.
The table shows the pH ranges that support the growth of different bacteria.
Bacteria pH range
Salmonella 3.6–9.5
Listeria monocytogenes 4.2–9.6
Escherichia coli 4.3–9.0
What happens to these organisms at a pH of 2.9?
a
Salmonella grows. Listeria monocytogenes and Escherichia coli do not grow.
b
Listeria monocytogenes grows. Salmonella and Escherichia coli do not grow.
c
Escherichia coli grows. Listeria monocytogenes and Salmonella do not grow.
d
Salmonella, Listeria monocytogenes and Escherichia coli do not grow.
1 answer
1 answer