Psychrotrophs

Definition

Psychrotrophs are microorganisms that can grow at low temperatures, typically between 0°C and 30°C. They are often found in refrigerated foods and can cause spoilage.

5 Must Know Facts For Your Next Test

1. Psychrotrophs can grow at refrigeration temperatures, which is why they are a concern for food preservation.
2. Common psychrotrophs include species of Pseudomonas, Listeria, and Clostridium.
3. They have an optimal growth range from around 20°C to 30°C but can still thrive at lower temperatures.
4. Psychrotrophic bacteria are not only spoilage organisms but some, like Listeria monocytogenes, can be pathogenic.
5. Control of psychrotrophs in food environments often involves strict hygiene practices and temperature control.

Review Questions

Related terms

Mesophiles:

Microorganisms that grow best in moderate temperature ranges, typically between 20°C and 45°C.

Thermophiles:

Microorganisms that thrive at relatively high temperatures, usually between 41°C and 122°C.

Psychrophiles:

Microorganisms that grow optimally at very low temperatures, generally below 15°C.