Refrigeration

制冷
  • 文章类型: Journal Article
    世界贸易和保鲜技术的发展带动了国际冷链物流的快速发展。然而,目前,新型冠状病毒疫情继续在世界各地蔓延,这对国际冷链物流的疾病传播控制和安全监管提出了挑战。构建进口冷链物流安全监管系统(ICCL-SSS)有助于检测和控制疾病进口风险。本文构建了综合考虑港口物流过程中三个过程潜在风险因素的ICCL安全评价指标体系,清关过程,以及从港口到门的物流过程。结合可拓决策模型和熵权法对ICCL-SSS的风险水平进行评价。以上海为例,中国,世界上最大的ICCL城市,说明上海ICCL-SSS总体风险水平处于中等水平。然而,装卸过程,检验检疫,消毒和灭菌,特别是货物储存风险很高。ICCL-SSS的构建和风险评估可以为提高后疫情时代ICCL监管的安全监管能力提供理论支持和实践指导,并帮助当地政府科学制定ICCL安全管理政策,加快世界冷链贸易的发展。
    The development of world trade and fresh-keeping technology has led to the rapid development of international cold chain logistics. However, the novel coronavirus epidemic continues to spread around the world at the present stage, which challenges disease transmission control and safety supervision of international cold chain logistics. Constructing an Import Cold Chain Logistics Safety Supervision System (ICCL-SSS) is helpful for detecting and controlling disease import risk. This paper constructs an evaluation index system of ICCL safety that comprehensively considers the potential risk factors of three ICCL processes: the logistics process in port, the customs clearance process, and the logistics process from port to door. The risk level of ICCL-SSS is evaluated by combining the Extension Decision-making Model and the Entropy Weight Method. The case study of Shanghai, China, the world\'s largest city of ICCL, shows that the overall risk level of ICCL-SSS in Shanghai is at a moderate level. However, the processes of loading and unloading, inspection and quarantine, disinfection and sterilization, and cargo storage are at high risk specifically. The construction and risk assessment of ICCL-SSS can provide theoretical support and practical guidance for improving the safety supervision ability of ICCL regulation in the post-epidemic era, and helps the local government to scientifically formulate ICCL safety administration policies and accelerate the development of world cold chain trade.
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  • 文章类型: Journal Article
    这里首次提出了一种新的非热食品巴氏杀菌方法,建议通过高压灭活(HI)称为低压长时间(LPLT)巴氏灭菌或中等压力巴氏灭菌(MPP)。为了测试这种对原料奶的新型巴氏杀菌工艺,在三种不同的压力水平(150、200和250MPa)下进行HI的MPP,超过24小时,在自然可变的不受控制的室温(≈20°C)下,并与在600MPa下进行高压处理(HPP)(一个循环90s,第二个循环120s),然后在冷藏下储存21天。根据获得的结果,MPP在250MPa下超过24小时会导致总好氧中温微生物(TAM)更高的微生物失活,乳酸菌(LAB)和肠杆菌科(ENT)(至少为2.2、1.7和1.3logCFU/mL,分别)比HPP(1.1、1.0和1.2logCFU/mL,对于相同的微生物)。此外,MPP显示接种的微生物明显减少到检测极限以下,对于所有压力,仅16小时内,无害李斯特菌的降低幅度至少为5.7、5.4和5.5,Senftenberg沙门氏菌,和大肠杆菌,分别。此外,在冷藏保存期间,MPP样品(200MPa和250MPa),与HPP相比,保持较低的TAM/LAB/ENT,对于HI的MPP,计数低于定量/检测限至少21天。MPP(200MPa和250MPa)也导致计数低于接种的微生物的检测极限,在冷藏下至少21天。HI的MPP结果非常有希望作为一种新的非热食品巴氏杀菌,由于实现了超过5个对数的营养细菌减少,在冷藏下计数保持低于定量/检测限至少21天。
    A new nonthermal food pasteurization approach is here presented for the first time, proposed to be called low-pressure long-time (LPLT) pasteurization or moderate pressure pasteurization (MPP) by hyperbaric inactivation (HI). To test this novel pasteurization process on raw milk, MPP by HI was carried out at three different pressure levels (150, 200 and 250 MPa), over 24 h, at naturally variable uncontrolled room temperature (≈20 °C) and compared with high pressure processing (HPP) at 600 MPa (one cycle for 90 s and a second cycle of 120 s) followed by storage under refrigeration for 21 days. Based on the results obtained, MPP at 250 MPa over 24 h caused higher microbial inactivation on total aerobic mesophiles (TAM), lactic acid bacteria (LAB) and Enterobacteriaceae (ENT) (of at least 2.2, 1.7 and 1.3 log CFU/mL, respectively) than HPP (1.1, 1.0 and 1.2 log CFU/mL, for the same microorganisms). Moreover, MPP showed a clear reduction of inoculated microorganisms to below the detection limit, in only 16 h for all pressures with reductions of at least 5.7, 5.4 and 5.5 for Listeria innocua, Salmonella senftenberg, and Escherichia coli, respectively. Additionally, during preservation under refrigeration, MPP samples (200 MPa and 250 MPa), maintained lower TAM/LAB/ENT compared to HPP, being the counts below the quantification/detection limit for at least 21 days for MPP by HI. MPP (200 MPa and 250 MPa) resulted also in counts below the detection limit for the inoculated microorganisms up to at least 21 days under refrigeration. The results of MPP by HI are very promising as a new nonthermal food pasteurization, since over 5 log reduction of vegetative bacteria were achieved, with counts maintained below the quantification/detection limit for at least 21 days under refrigeration.
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  • 文章类型: Journal Article
    在这项研究中,我们通过考虑可能被副溶血性弧菌污染的冷藏虾的食品安全风险,评估了台湾送货上门的温度要求.之所以选择致病性副溶血性弧菌,是因为它是台湾源自受污染海鲜的食源性暴发的主要原因。由于食用生虾而生病的风险估计为每份7.3×10-3,根据实时温度曲线估算。在运输过程中将最高温度降低到7°C,并在100°C下烹饪虾5分钟可以将风险降低94%以上。这些干预措施,因此,建议将其用作送货上门冷链中温度管理控制的组成部分。这些发现可以帮助食品主管部门制定温度管理政策和法规,以防止冷链断裂并降低食品安全风险。实际应用:这项研究可能适用于提供低温食品的送货上门服务,如海鲜产品。
    In this study, we evaluated the temperature requirements for home delivery in Taiwan by considering food safety risks of chilled shrimp that may be contaminated with Vibrio parahaemolyticus. Pathogenic V. parahaemolyticus was chosen because it was the main cause of foodborne outbreaks originating from contaminated seafood in Taiwan. The risk of becoming ill due to consumption of raw shrimp was estimated to be 7.3 × 10-3 per serving, estimated based on the real-time temperature profile. Lowering the maximum temperature to 7 °C during transit and cooking shrimps at 100 °C for 5 min could reduce the risk by more than 94%. These interventions, therefore, were suggested to be used as an integral part of temperature management control in the home delivery cold chain. These findings can help food authorities to institute temperature management policies and regulations to prevent broken cold chains and reduce food safety risks. PRACTICAL APPLICATION: This research may be applicable to home delivery services that deliver low-temperature food products, such as seafood products.
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  • 文章类型: Journal Article
    霍乱是一种腹泻病,会导致快速脱水。感染是死亡和发病的重要原因。口服霍乱疫苗(OCV)已用于预防霍乱。在非洲,OCV交付成本的证据不足。本研究旨在分析Shanchol疫苗的交付成本,针对奇尔瓦湖爆发的霍乱疫情,重点开展疫苗接种活动,马拉维。
    疫苗接种运动于2016年2月和3月分两轮实施。使用结构化问卷收集每个疫苗接种相关活动产生的成本,包括疫苗采购和装运,培训,微观规划,致敏,社会动员和疫苗接种回合。收取的费用,包括财务和经济成本在内,使用Choltool进行了分析,标准化的霍乱成本计算器。
    总共,67,240人接受了两剂完整的疫苗。第一轮疫苗覆盖率高于第二轮。用免疫卡测量的两剂量覆盖率估计为58%。实施该运动的总财务成本为480275美元,而经济成本为588637美元。每名完全接种疫苗者的总财务和经济成本分别为7.14美元和8.75美元,交货成本分别为1.94美元和3.55美元。疫苗采购和运输分别占疫苗接种运动总费用的73%和59%,而发生的人员成本占总财务和经济成本的13%和29%。提供单剂量Shanchol的成本估计为0.97美元。
    这项研究提供了有关国际合作伙伴与卫生部合作实施的反应性活动的经济和财务成本的新证据。它表明,国际合作伙伴的参与可能代表竞选成本的很大一部分,影响单位和疫苗交付成本。
    Cholera is a diarrheal disease that produces rapid dehydration. The infection is a significant cause of mortality and morbidity. Oral cholera vaccine (OCV) has been propagated for the prevention of cholera. Evidence on OCV delivery cost is insufficient in the African context. This study aims to analyze Shanchol vaccine delivery costs, focusing on the vaccination campaign in response of a cholera outbreak in Lake Chilwa, Malawi.
    The vaccination campaign was implemented in two rounds in February and March 2016. Structured questionnaires were used to collect costs incurred for each vaccination related activity, including vaccine procurement and shipment, training, microplanning, sensitization, social mobilization and vaccination rounds. Costs collected, including financial and economic costs were analyzed using Choltool, a standardized cholera cost calculator.
    In total, 67,240 persons received two complete doses of the vaccine. Vaccine coverage was higher in the first round than in the second. The two-dose coverage measured with the immunization card was estimated at 58%. The total financial cost incurred in implementing the campaign was US$480275 while the economic cost was US$588637. The total financial and economic costs per fully vaccinated person were US$7.14 and US$8.75, respectively, with delivery costs amounting to US$1.94 and US$3.55, respectively. Vaccine procurement and shipment accounted respectively for 73% and 59% of total financial and economic costs of the total vaccination campaign costs while the incurred personnel cost accounted for 13% and 29% of total financial and economic costs. Cost for delivering a single dose of Shanchol was estimated at US$0.97.
    This study provides new evidence on economic and financial costs of a reactive campaign implemented by international partners in collaboration with MoH. It shows that involvement of international partners\' personnel may represent a substantial share of campaign\'s costs, affecting unit and vaccine delivery costs.
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  • 文章类型: Journal Article
    BACKGROUND: Cameroon\'s cities have a growing concentration of target children not adequately covered by routine immunization programmes.
    METHODS: We conducted a descriptive cross-sectional study, based on exhaustive sampling of legal health care facilities offering routine immunization services in the health district of Djoungolo (city of Yaoundé). The evaluation of the immunization programmes was based on the \"Reaching Every District\" approach.
    RESULTS: Out of the 70 health care facilities that participated in the study, 3 (4.3%) had an updated microplan for routine immunization. Out of the 63 (89.4%) health care facilities with functional refrigerator, 12 (19.0%) vaccinated employing a fixed strategy on daily basis. Fifty-seven (81.0%) health care facilities did not conduct immunization sessions employing advanced strategy. Community participation in routine immunization programs was effective in 1 out of 12 districts health areas. A steadily updated vaccine tracking curve was available in 6 (8.5%) health facilities.
    CONCLUSIONS: The \"Reaching Every District\" approach implemented in Djoungolo health care district doesn\'t provide adequate coverage of a maximum rate of targeted children. The effectiveness of realistic microplanning, the regularity of vaccination sessions employing fixed and advanced strategies, action-oriented data monitoring, community revitalization plan to promote immunization are ways to improve the provision of vaccination services in this district.
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  • 文章类型: Journal Article
    BACKGROUND: Adverse temperature recording in vaccine\'s cold chain is a major issue worldwide and this condition is known to compromise the quality of vaccines very rapidly. In Cameroon, with tropical climate, vaccines exposure to abnormal temperatures is very common. This study was conducted to identify factors associated to abnormal temperature recording in cold chain in the North West region.
    RESULTS: A total of 65 vaccinating health facilities were visited for the study from eight health districts. Concerning type of health facility, 48 (73.8%) of the health facilities were governmental facilities. About 50 (76.0%) of the facilities had a functional thermometer. Among the 50 health facilities with functional thermometer, abnormal temperatures were registered in 10 (20%) health facilities during data collection and 12 (24%) in the 2 months preceding collection. Factor significantly associated with abnormal temperature recording was the absence of an alternative power source (OR = 6.5, p = 0.03).
    CONCLUSIONS: The absence of an alternative source of power was significantly associated with abnormal temperature exposure in the 2 months preceding data collection. To improve on the quality of vaccines administered in North West region, each vaccinating health facility must have at least two sources of power supply.
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  • 文章类型: Journal Article
    SUMMARY To determine risk factors for sporadic Vibrio parahaemolyticus gastroenteritis, we conducted a population-based case-control study in sentinel hospital surveillance areas of Shanghai and Jiangsu province, China. Seventy-one patients with diarrhoea and confirmed V. parahaemolyticus infections were enrolled, and they were matched with 142 controls for gender, age and residential area. From the multivariable analysis, V. parahaemolyticus infections were associated with antibiotics taken during the 4 weeks prior to illness [odds ratio (OR) 7·6, 95% confidence interval (CI) 1·1–54·4)], frequent eating out (OR 3·3, 95% CI 1·0–10·4), and shellfish consumption (OR 3·4, 95% CI 1·0–11·1), with population-attributable fractions of 0·09, 0·24, and 0·14, respectively. Protective factors included keeping the aquatic products refrigerated (OR 0·4, 95% CI 0·2–1·0) and pork consumption (OR 0·2, 95% CI 0·1–0·9) [corrected] .
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  • 文章类型: Case Reports
    OBJECTIVE: The authors conducted for the first time a medication error review (REMED) following a medication error occurred in an intensive care unit. The aim of this study was to assess this first REMED.
    METHODS: Descriptive study.
    METHODS: The analysis of the medication error, consisting in the administration of Clottafact(®) instead of Aclotine(®), was performed using the REMED method.
    RESULTS: The medication error was characterized as \"proved error\" and \"missed before administration\". Four main causes were identified: poor quality of drug storage, homophony between Aclotine(®) and Clottafact(®), non-compliance with good practices, and need of hemofiltration for the patient. At least, this REMED analysis led to the establishment of four improvements measures.
    CONCLUSIONS: The educational aspect of the REMED was clearly appreciated by all the different health care workers who participated to the analysis. Even if medication errors may occur at the different steps of the medication process, the REMED is a very good tool to improve the care quality and also to reduce the drug iatrogenic risk.
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  • 文章类型: Evaluation Study
    BACKGROUND: People who handle and regulate temperature-sensitive pharmaceutical products require the knowledge and skills to ensure those products maintain quality, integrity, safety, and efficacy throughout their shelf life. People best acquire such knowledge and skills through \"experiential learning\" that involves working with other learners and experts.
    METHODS: The World Health Organization developed a weeklong experiential learning event for participants so they could gain experience in how temperature-sensitive products are handled, stored, and distributed throughout the length of the distribution supply chain system. This experiential learning method enabled participants to visit, critically observe, discuss and report on the various components of the cold chain process. An emphasis was placed on team members working together to learn from one another and on several global expert mentors who were available to guide the learning, share their experiences, and respond to questions.
    RESULTS: The learning event, Pharmaceutical Cold Chain Management on Wheels, has been conducted once each year since 2008 in Turkey with participants from the global pharmaceutical industry, health care providers, national regulatory authorities, and suppliers/vendors. Observations made during the course showed that it was consistent with the principles of experiential and social learning theories. Questionnaires and focus groups provided evidence of the value of the learning event and ways to improve it.
    CONCLUSIONS: Reflecting the critical elements derived from experiential and social learning theories, five factors contributed to the success of this unique experiential learning event. These factors may also have relevance in other experiential learning courses and, potentially, for experiential e-learning events.
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  • 文章类型: Case Reports
    BACKGROUND: The aim of this study was to describe the investigation of a case of meningitis in a neonatal intensive care unit in order to identify the source of infection and the associated risk factors.
    METHODS: An analysis was carried out on the possible risk factors associated with the infection. E. sakazakii was detected in the batch of the powdered infant formula used during the feeding of the neonate and the initial level of contamination of the microorganism was estimated. The strains of E. sakazakii previously isolated in blood and faeces of the infected neonate and those isolated in infant formula were characterised by biotype, pulsotype and antimicrobial susceptibility.
    RESULTS: E. sakazakii was detected in one opened and two unopened cases of a single batch of powdered infant formula. The E. sakazakii strains isolated in the samples of the product and those isolated in the infected neonate showed the same biochemical, antibiotic susceptibility and PFGE pattern.
    CONCLUSIONS: The case of meningitis in the neonatal intensive care unit occurred as a result of the use of a powered infant formula contaminated with E. sakazakii at manufacturing level, and an inadequate preparation and storing of the reconstituted product were identified as risk factors.
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