Survival and growth of Yersinia enterocolitica strains inoculated in skimmed milk treated with high hydrostatic pressure.
Int J Food Microbiol
; 102(3): 337-42, 2005 Jul 25.
Article
in En
| MEDLINE
| ID: mdl-16014300
ABSTRACT
Four human pathogenic strains of Yersinia enterocolitica (serotypes O1, O3, O8, and O9) were inoculated (7-8 log CFU/ml) in UHT skimmed milk and treated at 300, 400, and 500 MPa for 10 min at 20 degrees C, and then kept at 8 degrees C to assess their evolution for 15 days. Treatments at 400 and 500 MPa caused the highest lethality, generally reaching counts below detection level (1 CFU/ml) in the culture media. At 300 MPa, the most baroresistant serotypes were O3 and O8. After 15 days of storage at 8 degrees C, Y. enterocolitica showed growth over 8 log (CFU/ml) in all treatments. Kinetic study of microbial inactivation in skimmed milk was performed with serotype O8 at 300 MPa, showing a tailing after 35 min of pressure treatment.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Yersinia enterocolitica
/
Milk
/
Food Microbiology
/
Hydrostatic Pressure
Limits:
Animals
/
Humans
Language:
En
Journal:
Int J Food Microbiol
Journal subject:
CIENCIAS DA NUTRICAO
/
MICROBIOLOGIA
Year:
2005
Document type:
Article
Affiliation country:
España
Publication country:
HOLANDA
/
HOLLAND
/
NETHERLANDS
/
NL
/
PAISES BAJOS
/
THE NETHERLANDS