L’ESPERTO RISPONDE – MICROBIOLOGIA ALIMENTARE & LISTERIA MONOCYTOGENES

I fattori che possono avere

impatto sulla crescita

e sopravvivenza di Listeria

monocytogenes

Da Sanco. Guidance document on Listeria monocytogenes shelf-life studies for ready-to-eat foods (2008).

 

Growing

Growing

Growing

No growing

 

Lower limit

Optimal

Higher limit

Temperature (°C)

1,5 / +3

30 / 37

45

-18

pH

4,2 / 4,3

7,0

9,4 / 9,5

3,3 / 4,2

Water activity

0,90 / 0,93

0,99

>0,99

<0,90

% Salt concentration

<0,5

0,7

12 / 16

> 20

Atmosphere

Facultative aerobic: it can grow in presence or absence of O2

Heating treatment during food production

Different combinations time / temperature to obtain D-6