Evaluation of Environmental Resistance of Cronobacter spp.
Powdered infant formula (PIF) is the main source of Cronobacter spp. contamination, among which the addition of raw and auxiliary materials and the processing environment are the most important routes of transmission. In order to effectively prevent and control Cronobacter spp. to ensure the safety...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Lidong PANG [verfasserIn] Danliangmin SONG [verfasserIn] Ai JIA [verfasserIn] Yu LI [verfasserIn] Yaqi LIANG [verfasserIn] Qunchao SU [verfasserIn] Yaping ZHENG [verfasserIn] Ran LI [verfasserIn] Chaoxin MAN [verfasserIn] Yujun JIANG [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Chinesisch |
| Erschienen: |
2022 |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
In: Shipin gongye ke-ji - The editorial department of Science and Technology of Food Industry, 2022, 43(2022), 23, Seite 161-167 |
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| Übergeordnetes Werk: |
volume:43 ; year:2022 ; number:23 ; pages:161-167 |
| Links: |
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| DOI / URN: |
10.13386/j.issn1002-0306.2022040050 |
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| Katalog-ID: |
DOAJ016683218 |
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| 520 | |a Powdered infant formula (PIF) is the main source of Cronobacter spp. contamination, among which the addition of raw and auxiliary materials and the processing environment are the most important routes of transmission. In order to effectively prevent and control Cronobacter spp. to ensure the safety of dairy products, eight strains of Cronobacter spp. isolated from PIF and its processing environment were used as the research objects. Their heat resistance, acid and alkali resistance, dryness resistance and permeability resistance were studied, and the differences of environmental resistance of different strains were analyzed. The results showed that Cronobacter spp. had different heat resistance. The strains isolated from the end products had relatively stronger heat resistance. Cronobacter spp. generally had the characteristics of acid resistance but not alkali resistance. Under the acidic conditions at pH1.5, all strains could still survive being treated for 30 s. Cronobacter spp. had strong resistance to desiccation. The bacterial count of all strains decreased from an initial concentration of 108 CFU/mL to 105 CFU/mL over the course of the 7-month test at room temperature with a relative air humidity of 20.7%. The slow decreasing trend indicated that Cronobacter spp. had a strong ability to resist dry environment. Cronobacter spp. had a strong resistance to osmosis. We found that all strains grew slowly when the concentration of NaCl was over 8% and the tolerance of Cronobacter spp. to sorbitol was stronger than that to NaCl under isotonic conditions. | ||
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10.13386/j.issn1002-0306.2022040050 doi (DE-627)DOAJ016683218 (DE-599)DOAJ3b197d9d4bee49739ff2c376dcdec4b4 DE-627 ger DE-627 rakwb chi TP368-456 Lidong PANG verfasserin aut Evaluation of Environmental Resistance of Cronobacter spp. 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Powdered infant formula (PIF) is the main source of Cronobacter spp. contamination, among which the addition of raw and auxiliary materials and the processing environment are the most important routes of transmission. In order to effectively prevent and control Cronobacter spp. to ensure the safety of dairy products, eight strains of Cronobacter spp. isolated from PIF and its processing environment were used as the research objects. Their heat resistance, acid and alkali resistance, dryness resistance and permeability resistance were studied, and the differences of environmental resistance of different strains were analyzed. The results showed that Cronobacter spp. had different heat resistance. The strains isolated from the end products had relatively stronger heat resistance. Cronobacter spp. generally had the characteristics of acid resistance but not alkali resistance. Under the acidic conditions at pH1.5, all strains could still survive being treated for 30 s. Cronobacter spp. had strong resistance to desiccation. The bacterial count of all strains decreased from an initial concentration of 108 CFU/mL to 105 CFU/mL over the course of the 7-month test at room temperature with a relative air humidity of 20.7%. The slow decreasing trend indicated that Cronobacter spp. had a strong ability to resist dry environment. Cronobacter spp. had a strong resistance to osmosis. We found that all strains grew slowly when the concentration of NaCl was over 8% and the tolerance of Cronobacter spp. to sorbitol was stronger than that to NaCl under isotonic conditions. cronobacter spp. powdered infant formulas heat resistance acid and alkali resistance dryness resistance permeability resistance Food processing and manufacture Danliangmin SONG verfasserin aut Ai JIA verfasserin aut Yu LI verfasserin aut Yaqi LIANG verfasserin aut Qunchao SU verfasserin aut Yaping ZHENG verfasserin aut Ran LI verfasserin aut Chaoxin MAN verfasserin aut Yujun JIANG verfasserin aut In Shipin gongye ke-ji The editorial department of Science and Technology of Food Industry, 2022 43(2022), 23, Seite 161-167 (DE-627)DOAJ000150428 10020306 nnns volume:43 year:2022 number:23 pages:161-167 https://doi.org/10.13386/j.issn1002-0306.2022040050 kostenfrei https://doaj.org/article/3b197d9d4bee49739ff2c376dcdec4b4 kostenfrei http://www.spgykj.com/cn/article/doi/10.13386/j.issn1002-0306.2022040050 kostenfrei https://doaj.org/toc/1002-0306 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ AR 43 2022 23 161-167 |
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10.13386/j.issn1002-0306.2022040050 doi (DE-627)DOAJ016683218 (DE-599)DOAJ3b197d9d4bee49739ff2c376dcdec4b4 DE-627 ger DE-627 rakwb chi TP368-456 Lidong PANG verfasserin aut Evaluation of Environmental Resistance of Cronobacter spp. 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Powdered infant formula (PIF) is the main source of Cronobacter spp. contamination, among which the addition of raw and auxiliary materials and the processing environment are the most important routes of transmission. In order to effectively prevent and control Cronobacter spp. to ensure the safety of dairy products, eight strains of Cronobacter spp. isolated from PIF and its processing environment were used as the research objects. Their heat resistance, acid and alkali resistance, dryness resistance and permeability resistance were studied, and the differences of environmental resistance of different strains were analyzed. The results showed that Cronobacter spp. had different heat resistance. The strains isolated from the end products had relatively stronger heat resistance. Cronobacter spp. generally had the characteristics of acid resistance but not alkali resistance. Under the acidic conditions at pH1.5, all strains could still survive being treated for 30 s. Cronobacter spp. had strong resistance to desiccation. The bacterial count of all strains decreased from an initial concentration of 108 CFU/mL to 105 CFU/mL over the course of the 7-month test at room temperature with a relative air humidity of 20.7%. The slow decreasing trend indicated that Cronobacter spp. had a strong ability to resist dry environment. Cronobacter spp. had a strong resistance to osmosis. We found that all strains grew slowly when the concentration of NaCl was over 8% and the tolerance of Cronobacter spp. to sorbitol was stronger than that to NaCl under isotonic conditions. cronobacter spp. powdered infant formulas heat resistance acid and alkali resistance dryness resistance permeability resistance Food processing and manufacture Danliangmin SONG verfasserin aut Ai JIA verfasserin aut Yu LI verfasserin aut Yaqi LIANG verfasserin aut Qunchao SU verfasserin aut Yaping ZHENG verfasserin aut Ran LI verfasserin aut Chaoxin MAN verfasserin aut Yujun JIANG verfasserin aut In Shipin gongye ke-ji The editorial department of Science and Technology of Food Industry, 2022 43(2022), 23, Seite 161-167 (DE-627)DOAJ000150428 10020306 nnns volume:43 year:2022 number:23 pages:161-167 https://doi.org/10.13386/j.issn1002-0306.2022040050 kostenfrei https://doaj.org/article/3b197d9d4bee49739ff2c376dcdec4b4 kostenfrei http://www.spgykj.com/cn/article/doi/10.13386/j.issn1002-0306.2022040050 kostenfrei https://doaj.org/toc/1002-0306 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ AR 43 2022 23 161-167 |
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10.13386/j.issn1002-0306.2022040050 doi (DE-627)DOAJ016683218 (DE-599)DOAJ3b197d9d4bee49739ff2c376dcdec4b4 DE-627 ger DE-627 rakwb chi TP368-456 Lidong PANG verfasserin aut Evaluation of Environmental Resistance of Cronobacter spp. 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Powdered infant formula (PIF) is the main source of Cronobacter spp. contamination, among which the addition of raw and auxiliary materials and the processing environment are the most important routes of transmission. In order to effectively prevent and control Cronobacter spp. to ensure the safety of dairy products, eight strains of Cronobacter spp. isolated from PIF and its processing environment were used as the research objects. Their heat resistance, acid and alkali resistance, dryness resistance and permeability resistance were studied, and the differences of environmental resistance of different strains were analyzed. The results showed that Cronobacter spp. had different heat resistance. The strains isolated from the end products had relatively stronger heat resistance. Cronobacter spp. generally had the characteristics of acid resistance but not alkali resistance. Under the acidic conditions at pH1.5, all strains could still survive being treated for 30 s. Cronobacter spp. had strong resistance to desiccation. The bacterial count of all strains decreased from an initial concentration of 108 CFU/mL to 105 CFU/mL over the course of the 7-month test at room temperature with a relative air humidity of 20.7%. The slow decreasing trend indicated that Cronobacter spp. had a strong ability to resist dry environment. Cronobacter spp. had a strong resistance to osmosis. We found that all strains grew slowly when the concentration of NaCl was over 8% and the tolerance of Cronobacter spp. to sorbitol was stronger than that to NaCl under isotonic conditions. cronobacter spp. powdered infant formulas heat resistance acid and alkali resistance dryness resistance permeability resistance Food processing and manufacture Danliangmin SONG verfasserin aut Ai JIA verfasserin aut Yu LI verfasserin aut Yaqi LIANG verfasserin aut Qunchao SU verfasserin aut Yaping ZHENG verfasserin aut Ran LI verfasserin aut Chaoxin MAN verfasserin aut Yujun JIANG verfasserin aut In Shipin gongye ke-ji The editorial department of Science and Technology of Food Industry, 2022 43(2022), 23, Seite 161-167 (DE-627)DOAJ000150428 10020306 nnns volume:43 year:2022 number:23 pages:161-167 https://doi.org/10.13386/j.issn1002-0306.2022040050 kostenfrei https://doaj.org/article/3b197d9d4bee49739ff2c376dcdec4b4 kostenfrei http://www.spgykj.com/cn/article/doi/10.13386/j.issn1002-0306.2022040050 kostenfrei https://doaj.org/toc/1002-0306 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ AR 43 2022 23 161-167 |
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10.13386/j.issn1002-0306.2022040050 doi (DE-627)DOAJ016683218 (DE-599)DOAJ3b197d9d4bee49739ff2c376dcdec4b4 DE-627 ger DE-627 rakwb chi TP368-456 Lidong PANG verfasserin aut Evaluation of Environmental Resistance of Cronobacter spp. 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Powdered infant formula (PIF) is the main source of Cronobacter spp. contamination, among which the addition of raw and auxiliary materials and the processing environment are the most important routes of transmission. In order to effectively prevent and control Cronobacter spp. to ensure the safety of dairy products, eight strains of Cronobacter spp. isolated from PIF and its processing environment were used as the research objects. Their heat resistance, acid and alkali resistance, dryness resistance and permeability resistance were studied, and the differences of environmental resistance of different strains were analyzed. The results showed that Cronobacter spp. had different heat resistance. The strains isolated from the end products had relatively stronger heat resistance. Cronobacter spp. generally had the characteristics of acid resistance but not alkali resistance. Under the acidic conditions at pH1.5, all strains could still survive being treated for 30 s. Cronobacter spp. had strong resistance to desiccation. The bacterial count of all strains decreased from an initial concentration of 108 CFU/mL to 105 CFU/mL over the course of the 7-month test at room temperature with a relative air humidity of 20.7%. The slow decreasing trend indicated that Cronobacter spp. had a strong ability to resist dry environment. Cronobacter spp. had a strong resistance to osmosis. We found that all strains grew slowly when the concentration of NaCl was over 8% and the tolerance of Cronobacter spp. to sorbitol was stronger than that to NaCl under isotonic conditions. cronobacter spp. powdered infant formulas heat resistance acid and alkali resistance dryness resistance permeability resistance Food processing and manufacture Danliangmin SONG verfasserin aut Ai JIA verfasserin aut Yu LI verfasserin aut Yaqi LIANG verfasserin aut Qunchao SU verfasserin aut Yaping ZHENG verfasserin aut Ran LI verfasserin aut Chaoxin MAN verfasserin aut Yujun JIANG verfasserin aut In Shipin gongye ke-ji The editorial department of Science and Technology of Food Industry, 2022 43(2022), 23, Seite 161-167 (DE-627)DOAJ000150428 10020306 nnns volume:43 year:2022 number:23 pages:161-167 https://doi.org/10.13386/j.issn1002-0306.2022040050 kostenfrei https://doaj.org/article/3b197d9d4bee49739ff2c376dcdec4b4 kostenfrei http://www.spgykj.com/cn/article/doi/10.13386/j.issn1002-0306.2022040050 kostenfrei https://doaj.org/toc/1002-0306 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ AR 43 2022 23 161-167 |
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10.13386/j.issn1002-0306.2022040050 doi (DE-627)DOAJ016683218 (DE-599)DOAJ3b197d9d4bee49739ff2c376dcdec4b4 DE-627 ger DE-627 rakwb chi TP368-456 Lidong PANG verfasserin aut Evaluation of Environmental Resistance of Cronobacter spp. 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Powdered infant formula (PIF) is the main source of Cronobacter spp. contamination, among which the addition of raw and auxiliary materials and the processing environment are the most important routes of transmission. In order to effectively prevent and control Cronobacter spp. to ensure the safety of dairy products, eight strains of Cronobacter spp. isolated from PIF and its processing environment were used as the research objects. Their heat resistance, acid and alkali resistance, dryness resistance and permeability resistance were studied, and the differences of environmental resistance of different strains were analyzed. The results showed that Cronobacter spp. had different heat resistance. The strains isolated from the end products had relatively stronger heat resistance. Cronobacter spp. generally had the characteristics of acid resistance but not alkali resistance. Under the acidic conditions at pH1.5, all strains could still survive being treated for 30 s. Cronobacter spp. had strong resistance to desiccation. The bacterial count of all strains decreased from an initial concentration of 108 CFU/mL to 105 CFU/mL over the course of the 7-month test at room temperature with a relative air humidity of 20.7%. The slow decreasing trend indicated that Cronobacter spp. had a strong ability to resist dry environment. Cronobacter spp. had a strong resistance to osmosis. We found that all strains grew slowly when the concentration of NaCl was over 8% and the tolerance of Cronobacter spp. to sorbitol was stronger than that to NaCl under isotonic conditions. cronobacter spp. powdered infant formulas heat resistance acid and alkali resistance dryness resistance permeability resistance Food processing and manufacture Danliangmin SONG verfasserin aut Ai JIA verfasserin aut Yu LI verfasserin aut Yaqi LIANG verfasserin aut Qunchao SU verfasserin aut Yaping ZHENG verfasserin aut Ran LI verfasserin aut Chaoxin MAN verfasserin aut Yujun JIANG verfasserin aut In Shipin gongye ke-ji The editorial department of Science and Technology of Food Industry, 2022 43(2022), 23, Seite 161-167 (DE-627)DOAJ000150428 10020306 nnns volume:43 year:2022 number:23 pages:161-167 https://doi.org/10.13386/j.issn1002-0306.2022040050 kostenfrei https://doaj.org/article/3b197d9d4bee49739ff2c376dcdec4b4 kostenfrei http://www.spgykj.com/cn/article/doi/10.13386/j.issn1002-0306.2022040050 kostenfrei https://doaj.org/toc/1002-0306 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ AR 43 2022 23 161-167 |
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In order to effectively prevent and control Cronobacter spp. to ensure the safety of dairy products, eight strains of Cronobacter spp. isolated from PIF and its processing environment were used as the research objects. Their heat resistance, acid and alkali resistance, dryness resistance and permeability resistance were studied, and the differences of environmental resistance of different strains were analyzed. The results showed that Cronobacter spp. had different heat resistance. The strains isolated from the end products had relatively stronger heat resistance. Cronobacter spp. generally had the characteristics of acid resistance but not alkali resistance. Under the acidic conditions at pH1.5, all strains could still survive being treated for 30 s. Cronobacter spp. had strong resistance to desiccation. The bacterial count of all strains decreased from an initial concentration of 108 CFU/mL to 105 CFU/mL over the course of the 7-month test at room temperature with a relative air humidity of 20.7%. The slow decreasing trend indicated that Cronobacter spp. had a strong ability to resist dry environment. Cronobacter spp. had a strong resistance to osmosis. 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Lidong PANG Danliangmin SONG Ai JIA Yu LI Yaqi LIANG Qunchao SU Yaping ZHENG Ran LI Chaoxin MAN Yujun JIANG |
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Evaluation of Environmental Resistance of Cronobacter spp. |
| abstract |
Powdered infant formula (PIF) is the main source of Cronobacter spp. contamination, among which the addition of raw and auxiliary materials and the processing environment are the most important routes of transmission. In order to effectively prevent and control Cronobacter spp. to ensure the safety of dairy products, eight strains of Cronobacter spp. isolated from PIF and its processing environment were used as the research objects. Their heat resistance, acid and alkali resistance, dryness resistance and permeability resistance were studied, and the differences of environmental resistance of different strains were analyzed. The results showed that Cronobacter spp. had different heat resistance. The strains isolated from the end products had relatively stronger heat resistance. Cronobacter spp. generally had the characteristics of acid resistance but not alkali resistance. Under the acidic conditions at pH1.5, all strains could still survive being treated for 30 s. Cronobacter spp. had strong resistance to desiccation. The bacterial count of all strains decreased from an initial concentration of 108 CFU/mL to 105 CFU/mL over the course of the 7-month test at room temperature with a relative air humidity of 20.7%. The slow decreasing trend indicated that Cronobacter spp. had a strong ability to resist dry environment. Cronobacter spp. had a strong resistance to osmosis. We found that all strains grew slowly when the concentration of NaCl was over 8% and the tolerance of Cronobacter spp. to sorbitol was stronger than that to NaCl under isotonic conditions. |
| abstractGer |
Powdered infant formula (PIF) is the main source of Cronobacter spp. contamination, among which the addition of raw and auxiliary materials and the processing environment are the most important routes of transmission. In order to effectively prevent and control Cronobacter spp. to ensure the safety of dairy products, eight strains of Cronobacter spp. isolated from PIF and its processing environment were used as the research objects. Their heat resistance, acid and alkali resistance, dryness resistance and permeability resistance were studied, and the differences of environmental resistance of different strains were analyzed. The results showed that Cronobacter spp. had different heat resistance. The strains isolated from the end products had relatively stronger heat resistance. Cronobacter spp. generally had the characteristics of acid resistance but not alkali resistance. Under the acidic conditions at pH1.5, all strains could still survive being treated for 30 s. Cronobacter spp. had strong resistance to desiccation. The bacterial count of all strains decreased from an initial concentration of 108 CFU/mL to 105 CFU/mL over the course of the 7-month test at room temperature with a relative air humidity of 20.7%. The slow decreasing trend indicated that Cronobacter spp. had a strong ability to resist dry environment. Cronobacter spp. had a strong resistance to osmosis. We found that all strains grew slowly when the concentration of NaCl was over 8% and the tolerance of Cronobacter spp. to sorbitol was stronger than that to NaCl under isotonic conditions. |
| abstract_unstemmed |
Powdered infant formula (PIF) is the main source of Cronobacter spp. contamination, among which the addition of raw and auxiliary materials and the processing environment are the most important routes of transmission. In order to effectively prevent and control Cronobacter spp. to ensure the safety of dairy products, eight strains of Cronobacter spp. isolated from PIF and its processing environment were used as the research objects. Their heat resistance, acid and alkali resistance, dryness resistance and permeability resistance were studied, and the differences of environmental resistance of different strains were analyzed. The results showed that Cronobacter spp. had different heat resistance. The strains isolated from the end products had relatively stronger heat resistance. Cronobacter spp. generally had the characteristics of acid resistance but not alkali resistance. Under the acidic conditions at pH1.5, all strains could still survive being treated for 30 s. Cronobacter spp. had strong resistance to desiccation. The bacterial count of all strains decreased from an initial concentration of 108 CFU/mL to 105 CFU/mL over the course of the 7-month test at room temperature with a relative air humidity of 20.7%. The slow decreasing trend indicated that Cronobacter spp. had a strong ability to resist dry environment. Cronobacter spp. had a strong resistance to osmosis. We found that all strains grew slowly when the concentration of NaCl was over 8% and the tolerance of Cronobacter spp. to sorbitol was stronger than that to NaCl under isotonic conditions. |
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Evaluation of Environmental Resistance of Cronobacter spp. |
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