A comparative study of thermal and acid inactivation kinetics in fruit juices of Salmonella enterica serovar Typhimurium and Salmonella enterica serovar Senftenberg grown at acidic conditions.
Identifieur interne : 000A42 ( Ncbi/Checkpoint ); précédent : 000A41; suivant : 000A43A comparative study of thermal and acid inactivation kinetics in fruit juices of Salmonella enterica serovar Typhimurium and Salmonella enterica serovar Senftenberg grown at acidic conditions.
Auteurs : Avelino Alvarez-Ord Ez [Espagne] ; Ana Fernández ; Ana Bernardo ; Mercedes L PezSource :
- Foodborne pathogens and disease [ 1556-7125 ] ; 2009.
English descriptors
- KwdEn :
- Acetic Acid (chemistry), Beverages (microbiology), Citric Acid (chemistry), Citrus sinensis, Colony Count, Microbial, Foodborne Diseases (prevention & control), Fruit, Hot Temperature, Hydrogen-Ion Concentration, Kinetics, Lactic Acid (chemistry), Malus, Salmonella enterica (growth & development), Salmonella typhimurium (growth & development), Stress, Physiological, Time Factors.
- MESH :
- chemical , chemistry : Acetic Acid, Citric Acid, Lactic Acid.
- growth & development : Salmonella enterica, Salmonella typhimurium.
- microbiology : Beverages.
- prevention & control : Foodborne Diseases.
- Citrus sinensis, Colony Count, Microbial, Fruit, Hot Temperature, Hydrogen-Ion Concentration, Kinetics, Malus, Stress, Physiological, Time Factors.
Abstract
Acid and heat inactivation in orange and apple juices of Salmonella enterica serovar Typhimurium Colección Española de Cultivos Tipo (i.e., Spanish Type Culture Collection) 443 (CECT 443) (Salmonella Typhimurium) and S. enterica serovar Senftenberg CECT 4384 (Salmonella Senftenberg) grown in buffered brain heart infusion (pH 7.0) and acidified brain heart infusion up to pH 4.5 with acetic, citric, lactic, and hydrochloric acids was evaluated. Acid adaptation induced an adaptive response that increased the subsequent resistance to extreme pH conditions (pH 2.5) and to heat, although the magnitude of these responses differed between the two isolates and fruit juices. The acid resistance in orange juice for acid-adapted cells (D-values of 28.3-34.5 min for Salmonella Senftenberg and 30.0-39.2 min for Salmonella Typhimurium) resulted to be about two to three times higher than that corresponding to non-acid-adapted cells. In apple juice, acid-adapted Salmonella Senftenberg cells survived better than those of Salmonella Typhimurium, obtaining mean D-values of 114.8 +/- 12.3 and 41.9 +/- 2.5 min, respectively. The thermotolerance of non-acid-adapted Salmonella Typhimurium in orange (D(58)-value: 0.028 min) and apple juices (D(58)-value: 0.10 min) was approximately double for acid-adapted cells. This cross-protection to heat was more strongly expressed in Salmonella Senftenberg. D(58)-values obtained for non-acid-adapted cells in orange (0.11 min) and apple juices (0.19 min) increased approximately 10 and 5 times, respectively, after their growth in acidified media. The conditions prevailing during bacterial growth and heat treatment did not significantly influence the z-values observed (6.0 +/- 0.3 degrees C for Salmonella Typhimurium and 7.0 +/- 0.3 degrees C for Salmonella Senftenberg). The enhanced acid resistance found for both isolates could enable them to survive for prolonged time periods in the gastrointestinal tract, increasing the risk of illness. Further, it should be taken into account that microbial growth in acidified media also induces a cross-protection response against heat that should also be considered for the design of pasteurization processes for acid foods.
DOI: 10.1089/fpd.2009.0313
PubMed: 19694554
Affiliations:
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pubmed:19694554Le document en format XML
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<author><name sortKey="Alvarez Ord Ez, Avelino" sort="Alvarez Ord Ez, Avelino" uniqKey="Alvarez Ord Ez A" first="Avelino" last="Alvarez-Ord Ez">Avelino Alvarez-Ord Ez</name>
<affiliation wicri:level="1"><nlm:affiliation>Higiene y Tecnología de los Alimentos, Universidad de León, León, Spain .</nlm:affiliation>
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<author><name sortKey="L Pez, Mercedes" sort="L Pez, Mercedes" uniqKey="L Pez M" first="Mercedes" last="L Pez">Mercedes L Pez</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en">A comparative study of thermal and acid inactivation kinetics in fruit juices of Salmonella enterica serovar Typhimurium and Salmonella enterica serovar Senftenberg grown at acidic conditions.</title>
<author><name sortKey="Alvarez Ord Ez, Avelino" sort="Alvarez Ord Ez, Avelino" uniqKey="Alvarez Ord Ez A" first="Avelino" last="Alvarez-Ord Ez">Avelino Alvarez-Ord Ez</name>
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<author><name sortKey="Fernandez, Ana" sort="Fernandez, Ana" uniqKey="Fernandez A" first="Ana" last="Fernández">Ana Fernández</name>
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<author><name sortKey="Bernardo, Ana" sort="Bernardo, Ana" uniqKey="Bernardo A" first="Ana" last="Bernardo">Ana Bernardo</name>
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<series><title level="j">Foodborne pathogens and disease</title>
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<term>Citrus sinensis</term>
<term>Colony Count, Microbial</term>
<term>Foodborne Diseases (prevention & control)</term>
<term>Fruit</term>
<term>Hot Temperature</term>
<term>Hydrogen-Ion Concentration</term>
<term>Kinetics</term>
<term>Lactic Acid (chemistry)</term>
<term>Malus</term>
<term>Salmonella enterica (growth & development)</term>
<term>Salmonella typhimurium (growth & development)</term>
<term>Stress, Physiological</term>
<term>Time Factors</term>
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<keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Acetic Acid</term>
<term>Citric Acid</term>
<term>Lactic Acid</term>
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<keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Salmonella enterica</term>
<term>Salmonella typhimurium</term>
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<keywords scheme="MESH" qualifier="microbiology" xml:lang="en"><term>Beverages</term>
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<keywords scheme="MESH" qualifier="prevention & control" xml:lang="en"><term>Foodborne Diseases</term>
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<keywords scheme="MESH" xml:lang="en"><term>Citrus sinensis</term>
<term>Colony Count, Microbial</term>
<term>Fruit</term>
<term>Hot Temperature</term>
<term>Hydrogen-Ion Concentration</term>
<term>Kinetics</term>
<term>Malus</term>
<term>Stress, Physiological</term>
<term>Time Factors</term>
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<front><div type="abstract" xml:lang="en">Acid and heat inactivation in orange and apple juices of Salmonella enterica serovar Typhimurium Colección Española de Cultivos Tipo (i.e., Spanish Type Culture Collection) 443 (CECT 443) (Salmonella Typhimurium) and S. enterica serovar Senftenberg CECT 4384 (Salmonella Senftenberg) grown in buffered brain heart infusion (pH 7.0) and acidified brain heart infusion up to pH 4.5 with acetic, citric, lactic, and hydrochloric acids was evaluated. Acid adaptation induced an adaptive response that increased the subsequent resistance to extreme pH conditions (pH 2.5) and to heat, although the magnitude of these responses differed between the two isolates and fruit juices. The acid resistance in orange juice for acid-adapted cells (D-values of 28.3-34.5 min for Salmonella Senftenberg and 30.0-39.2 min for Salmonella Typhimurium) resulted to be about two to three times higher than that corresponding to non-acid-adapted cells. In apple juice, acid-adapted Salmonella Senftenberg cells survived better than those of Salmonella Typhimurium, obtaining mean D-values of 114.8 +/- 12.3 and 41.9 +/- 2.5 min, respectively. The thermotolerance of non-acid-adapted Salmonella Typhimurium in orange (D(58)-value: 0.028 min) and apple juices (D(58)-value: 0.10 min) was approximately double for acid-adapted cells. This cross-protection to heat was more strongly expressed in Salmonella Senftenberg. D(58)-values obtained for non-acid-adapted cells in orange (0.11 min) and apple juices (0.19 min) increased approximately 10 and 5 times, respectively, after their growth in acidified media. The conditions prevailing during bacterial growth and heat treatment did not significantly influence the z-values observed (6.0 +/- 0.3 degrees C for Salmonella Typhimurium and 7.0 +/- 0.3 degrees C for Salmonella Senftenberg). The enhanced acid resistance found for both isolates could enable them to survive for prolonged time periods in the gastrointestinal tract, increasing the risk of illness. Further, it should be taken into account that microbial growth in acidified media also induces a cross-protection response against heat that should also be considered for the design of pasteurization processes for acid foods.</div>
</front>
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<affiliations><list><country><li>Espagne</li>
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<tree><noCountry><name sortKey="Bernardo, Ana" sort="Bernardo, Ana" uniqKey="Bernardo A" first="Ana" last="Bernardo">Ana Bernardo</name>
<name sortKey="Fernandez, Ana" sort="Fernandez, Ana" uniqKey="Fernandez A" first="Ana" last="Fernández">Ana Fernández</name>
<name sortKey="L Pez, Mercedes" sort="L Pez, Mercedes" uniqKey="L Pez M" first="Mercedes" last="L Pez">Mercedes L Pez</name>
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<country name="Espagne"><noRegion><name sortKey="Alvarez Ord Ez, Avelino" sort="Alvarez Ord Ez, Avelino" uniqKey="Alvarez Ord Ez A" first="Avelino" last="Alvarez-Ord Ez">Avelino Alvarez-Ord Ez</name>
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