Escherichia coli and Listeria innocua in kiwifruit and pineapple juices were exposed to high hydrostatic pressure (HHP) at 300 MPa for 5 min. Both bacteria showed equal resistance to HHP. Using low (0 degrees C) or sub-zero (-10 degrees C) temperatures instead of room temperature (20 degrees C) during pressurization did not change the effectiveness of HHP treatment on both bacteria in studied juices. Pulse pressure treatment (multiple pulses for a total holding time of 5 min at 300 MPa) instead of continuous (single pulse) treatment had no significant (p>0.05) effect on the microbial inactivation in kiwifruit juice; however, in pineapple juice pulse treatment, especially after 5 pulses, increased the inactivation significantly (p<0.05) for both bacteria. Following storage of pressure-treated (350 MPa, 20 degrees C for 60 s x 5 pulses) juices at 4, 20 and 37 degrees C up to 3 weeks, the level of microbial inactivation further increased and no injury recovery of the bacteria were detected. This work has shown that HHP treatment can be used to inactivate E. coli and L. innocua in kiwifruit and pineapple juices at lower pressure values at room temperature than the conditions used in commercial applications (>400 MPa). However, storage period and temperature should carefully be optimized to increase the safety of HHP treated fruit juices.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.ijfoodmicro.2008.03.015 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Efficient Extraction, Chemical Characterization, and Bioactivity of Essential Oil From Pine Needles.
Phytochem Anal
March 2025
Jiangsu Co-Innovation Centre of Efficient Processing and Utilization of Forest Resources, Jiangsu Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, College of Chemical Engineering, Nanjing Forestry University, Nanjing, China.
Introduction: Pine needles are a rich source of bioactive compounds, and there are few reports on the extraction and identification of active substances in various types of pine needles.
Objectives: The objective of this study is to enhance the efficiency and yield of pine needle essential oil extraction by employing an innovative ultrasonic-assisted salt-out hydrodistillation technology. It also aims to establish a correlation between gas chromatography-mass spectrometry (GC-MS) and electronic nose (E-nose) to distinguish essential oils from Cedrus deodara, Pinus thunbergii, Pinus massoniana, and Pinus koraiensis.
Epidemiology and genetic characterization of (X4)-positive and isolated from raw meat in Chengdu City, China.
Biosaf Health
April 2024
National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China.
The rapid spread of mobile tigecycline resistance presents a significant public health threat, particularly with the increasing prevalence of (X4)-positive Enterobacterales across various species. This study aimed to investigate the epidemic features and transmission dynamics of (X4)-positive (. ) through the analysis of 206 raw meats, including pork ( = 182), beef ( = 16), duck ( = 5), and chicken ( = 3).
View Article and Find Full Text PDFMonte Carlo simulation to optimize polymyxin B dosing regimens for the treatment of Gram-negative bacteremia.
Front Cell Infect Microbiol
March 2025
Department of Pharmacy, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, Shandong, China.
Objective: This study aimed to predict and evaluate the efficacy of various polymyxin B dosing regimens for Gram-negative bacteremia using Monte Carlo simulation, with a specific focus on assessing the efficacy in patients receiving continuous renal replacement therapy (CRRT). The goal was to optimize clinical dosing regimens and guide rational polymyxin B use in practice.
Methods: A total of 1,939 Gram-negative bacterial strains were analyzed, collected between April 2019 and December 2021 through the China Bloodstream Gram-negative Pathogens Antimicrobial Resistance and Virulence Surveillance Network (CARVIS-NET).
Transmission of ceftazidime-avibactam-resistant among pets, veterinarians and animal hospital environment.
Biosaf Health
June 2024
Department of Clinical Veterinary Medicine, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China.
Ceftazidime-avibactam (CZA) is a recently approved combination synthetic β-lactamase inhibitor used in human clinical medicine. Cases of CZA resistance in humans have already been reported, but limited research has investigated CZA resistance in pets. This study explored the prevalence and transmission of CZA-resistant (CZAREC) among pets, their owners, veterinarians, and the environment in animal hospitals.
View Article and Find Full Text PDFDiscovery of triazole derivatives for biofilm disruption, anti-inflammation and metal ion chelation.
Front Chem
February 2025
Department of Pediatrics, Maternity and Child Health Hospital of Qinhuangdao, Qinhuangdao, China.
In the face of bacterial hazards to human health and resistance to multiple antibiotics, there is an urgent need to develop new antibiotics to meet the challenge. In this paper, the triazolyl heterocyclic (3-amino-1,2,4-triazole, ) was synthesised efficiently using thiourea as starting material. Finally, the end product was obtained by aldehyde-amine condensation reaction and the structures of all compounds were determined by spectral analysis.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!