The bacterium is commonly found in deli meats, hot dogs, soft cheeses, raw meat, and unpasteurized milk.

The correct answer is Listeria monocytogenes.

Explanation:

Listeria monocytogenes recognized as foodborne pathogens in the 1980s. The listeria monocytogenes is the only species of Listeria that is pathogenic to humans.

The typical pH range it can grow is between 5-9. It is not seen that it can grow below pH 4.3. It is commonly found in deli meats, hot dogs, soft cheeses, raw meat, and unpasteurized milk.

The incubation period is between 3-70 days and its infection in the body is called listeriosis. The common symptoms are just like other foodborne diseases like diarrhea and fever. Children, pregnant women, and older persons are more susceptible to listeria infection.