Question

Listeria monocytogenes is  ________.

a. a psychrotrophic organism                   b. a common food-borne contaminant

c. capable of intracellular infection         d. all of the above           e. none of the above       

Answer 1

Correct answer is d. All of the above.

Listeria monocytogenes is a gram positive, ubiquitous, intracellular pathogen (it is an intracellular pathogen so it can grow and reproduce inside the cell of the host).

It is a psychrotrophic organism because it is able to grow at a lower temperature, even at 0° C.

It is a common food- borne contaminant so by ingestion of contaminanted food like raw food, cheese, hard boiled egg or ice-cream. it may infects brain, spinal cord membrane, or present in the blood stream of the human host.