Effects of high-pressure homogenization on the survival of Alicyclobacillus acidoterrestris in a laboratory medium.
OBJECTIVE
This study was aimed to investigate the effectiveness of high-pressure homogenization (HPH) against Alicyclobacillus acidoterrestris.


RESULTS
The susceptibility of three different strains of A. acidoterrestris (DSMZ 2498, Gamma4 and c8) to HPH (500-1700 bar) was studied. The experiments were performed in a laboratory medium (malt extract broth) on cells and spores. HPH caused a significant reduction of the initial cell number (1-2 log CFU ml(-1) at the highest pressures) in Gamma4 and DSMZ 2498 strains, whereas the effect on the spores was less significant.


CONCLUSIONS
This study showed that the susceptibility of A. acidoterrestris to HPH was strain-dependent: DSMZ 2498 seemed the most susceptible strain, whereas c8 was the most resistant one.


CONCLUSIONS
The results of our study will provide useful information on the sensitivity of an emerging spoilage micro-organism, such as A. acidoterrrestris, to HPH.
Bevilacqua
A
A
Department of Food Science, Faculty of Agricultural Science, Foggia University, Foggia, Italy.
Cibelli
F
F
Corbo
M R
MR
Sinigaglia
M
M
D003470:Culture Media; D005519:Food Preservation / Q000379:methods*; D016937:Gram-Positive Endospore-Forming Rods / Q000254:growth & development / Q000502:physiology*; D006874:Hydrostatic Pressure; D050296:Microbial Viability
D003470:Culture Media