Questions: Select all that apply Identify five characteristics of Listeria monocytogenes. Resistant to pH extremes Obligate anaerobe Spore-forming Spirochete Intracellular parasite Resistant to heat Flagellated Resistant to cold

Select all that apply Identify five characteristics of Listeria monocytogenes. Resistant to pH extremes Obligate anaerobe Spore-forming Spirochete Intracellular parasite Resistant to heat Flagellated Resistant to cold
Transcript text: Select all that apply Identify five characteristics of Listeria monocytogenes. Resistant to pH extremes Obligate anaerobe Spore-forming Spirochete Intracellular parasite Resistant to heat Flagellated Resistant to cold
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The correct characteristics of Listeria monocytogenes are:

  • Intracellular parasite: Listeria monocytogenes is known to be an intracellular pathogen, meaning it can invade and live within the cells of a host organism.

  • Flagellated: Listeria monocytogenes is motile due to the presence of flagella, especially at lower temperatures.

  • Resistant to cold: Listeria monocytogenes can grow at refrigeration temperatures, which is why it is a concern in refrigerated foods.

Explanation for each option:

  • Resistant to pH extremes: This is not a typical characteristic of Listeria monocytogenes. While it can survive in a range of pH levels, it is not particularly known for extreme pH resistance.

  • Obligate anaerobe: Listeria monocytogenes is not an obligate anaerobe; it is a facultative anaerobe, meaning it can survive in both the presence and absence of oxygen.

  • Spore-forming: Listeria monocytogenes does not form spores. It is a non-spore-forming bacterium.

  • Spirochete: Listeria monocytogenes is not a spirochete. It is a rod-shaped bacterium.

  • Resistant to heat: Listeria monocytogenes is not particularly resistant to heat. It can be killed by proper cooking temperatures.

In summary, the characteristics of Listeria monocytogenes include being an intracellular parasite, flagellated, and resistant to cold.

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