microbial load

微生物负荷
  • 文章类型: Journal Article
    目前对牛皮(ponmo)的需求非常高,尤其是在尼日利亚,由于商品价格上涨,包括动物蛋白,这迫使更多的人买不起肉,鸡肉,火鸡或鸡蛋依赖其他肉类产品,如“ponmo,\"\"昆迪,\"和\"tinko\"作为蛋白质的替代来源。这项研究旨在鉴定与ponmo相关的微生物,确定分离物的抗菌谱,并评估在Ilishan-Remo中央市场销售的ponmo的营养价值。对六个ponmo供应商进行了DryWhitePonmo(DWP)采样,湿白色Ponmo(WWP),湿布朗庞莫(WBP)和布朗庞莫水(BPW),并在无菌容器中运输到实验室进行分析,以确定微生物负荷,灵敏度,和使用标准化方法进行近似分析。微生物分析,样品一式三份进行测试。所分析的所有样品具有高微生物负荷计数(从1.1X106至1.4X107)。分离出的菌为大肠杆菌(34.21%),金黄色葡萄球菌(26.31%),克雷伯菌属。(18.42%),假单胞菌属。(13.15%)和凝固酶阴性葡萄球菌(7.89%)。所有分离株均为多药耐药(MDR)。Septrin的电阻率最高(86.84%),而庆大霉素的电阻率最低(7.89%)。38株分离株中有37株对培氟沙星敏感(敏感性为97.37%)。环丙沙星和庆大霉素排名第二和第三(敏感性分别为84.2%和73.68%)。根据近似分析,WWP有更多的蛋白质,脂肪,和纤维,而WBP有更多的水分。食品处理人员应遵循良好卫生习惯,并定期进行食品处理人员测试。
    The demand for cowhide (ponmo) is currently very high, particularly in Nigeria, due to rising commodity prices, including animal proteins, which has forced a larger percentage of the population who cannot afford meat, chicken, turkey or eggs to rely on other meat products such as \"ponmo,\" \"kundi,\" and \"tinko\" as an alternative source of protein. This research aims to identify microorganisms associated with ponmo, determine the antibiogram of the isolates, and assess the nutritional value of ponmo marketed in Ilishan-Remo central market. Six ponmo vendors were sampled for Dry White Ponmo (DWP), Wet White Ponmo (WWP), Wet Brown Ponmo (WBP) and Brown Ponmo Water (BPW) and transported in sterile containers to the Laboratory for analysis to determine the microbial load, sensitivity, and proximate analysis using standardized methods. For microbiological analysis, samples were tested in triplicate. All samples analyzed had a high microbial load count (from 1.1 x 106 to 1.4 x 107). The organisms isolated were Escherichia coli (34.21 %), Staphylococcus aureus (26.31 %), Klebsiella spp. (18.42 %), Pseudomonas spp. (13.15 %) and Coagulase-negative staphylococci (7.89 %). All the isolates were multidrug-resistant (MDR). Septrin had the highest resistivity (86.84 %) while gentamicin had the lowest resistance (7.89 %). Pefloxacin sensitivity was observed in 37 of the 38 isolates (97.37 % sensitivity). Ciprofloxacin and gentamicin came second and third (84.2 % and 73.68 % sensitivity) respectively. According to the proximate analysis, the WWP has more protein, fat, and fiber, whereas the WBP has more moisture. Food handlers should follow Good Hygiene Practices and take a Food Handlers Test regularly.
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  • 文章类型: Journal Article
    沙门氏菌属。和柠檬酸杆菌属。是引起重要食源性疾病爆发的微生物之一。在这项研究中,试图确定沙门氏菌的存在和比率。和柠檬酸杆菌属。在TürkiyeIsparta省某些地区收集的沙拉样品中。总共分析了50份沙拉样品。经典培养技术用于沙拉样品的微生物分析。使用VITEK-2系统鉴定获得的可疑分离株。尽管在研究中使用的沙拉样品中没有观察到负面的视觉变化,确定革兰氏阴性微生物的数量非常高,六个沙拉样品不适合公共卫生。在50份沙拉样本中,检出2%沙门氏菌和4%弗氏柠檬酸杆菌。此外,确定从沙拉样品中分离的沙门氏菌菌株对三种不同的抗生素具有抗性,柠檬酸杆菌对两种不同的抗生素具有抗性。沙门氏菌属。和柠檬酸杆菌属。被认为对公众健康非常危险,因为它们与食源性爆发有关,并且可以很快产生抗生素耐药性。沙拉生产商应尝试通过使用不同的技术来减少微生物污染的可能性。
    Salmonella spp. and Citrobacter spp. are among the microorganisms causing important foodborne outbreaks. In this study, it was tried to determine the presence and rate of Salmonella spp. and Citrobacter spp. in salad samples collected from certain regions of province of Isparta in Türkiye. A total of 50 salad samples were analyzed. Classical culture technique was used for microbiological analysis of salad samples. Suspected isolates obtained were identified using the VITEK-2 system. Although no negative visual changes were observed in the salad samples used in the study, it was determined that the number of Gram-negative microorganisms was very high and six salad samples were not suitable for public health. In 50 salad samples, 2% Salmonella and 4% Citrobacter freundii were detected. In addition, it was determined that the Salmonella strain isolated from the salad sample was resistant to three different antibiotics and Citrobacter was resistant to two different antibiotics. Salmonella spp. and Citrobacter spp. are considered very dangerous to public health because they are associated with foodborne outbreaks and can develop antibiotic resistance very quickly. Salad producers should try to reduce the possibility of microbial contamination by using different technologies.
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  • 文章类型: Journal Article
    蜂花粉是一种具有良好营养特征和治疗特性的健康产品。其高水分含量,然而,促进细菌的生长,模具,和酵母在储存过程中通常会导致产品降解。因此,这项研究的目的是评估伽马射线(GI)和臭氧(OZ)作为更长的储存时间的蜂花粉保存方法的有效性,以及它们是否受花粉种类的影响。要做到这一点,以0.68kGy/h的速率施用剂量为2.5、5.0和7.5kGy的GI,以0.01、0.02和0.03g/m3的浓度施用OZ一次,持续6小时,埃及三叶草和玉米蜂花粉,然后在环境温度下储存6个月。然后,我们确定了处理过的和未处理的花粉样品在储存0、3和6个月时的总酚含量(TPC)和抗氧化活性。细菌总数,霉菌,还在0、2、4和6个月评估酵母计数。统计分析显示,TPC,抗氧化剂,三叶草和玉米花粉样品的微生物负荷受处理和储存时间及其相互作用的显着影响(p<0.05)。在室温下储存6个月后,两种方法在保持花粉样品的抗氧化性能方面都非常有效。此外,GI和OZ应用的最高浓度完全保护花粉样品免受霉菌和酵母的侵害,同时减少细菌污染。发现最高剂量(7.5KGy)的GI在保存生物活性化合物和降低花粉样品的微生物计数6个月方面比其他GI剂量和OZ应用更有效。因此,我们建议养蜂人使用这个剂量的GI进行长期储存.
    Bee pollen is a healthy product with a good nutritional profile and therapeutic properties. Its high moisture content, however, promotes the growth of bacteria, molds, and yeast during storage commonly result in product degradation. Therefore, the aim of this study is to assess the effectiveness of gamma irradiation (GI) and ozone (OZ) as bee pollen preservation methods for longer storage time, as well as whether they are influenced by pollen species. To do that, GI at a dosage of 2.5, 5.0, and 7.5 kGy was applied at a rate of 0.68 kGy/h and OZ application at a concentration of 0.01, 0.02, and 0.03 g/m3 was applied for one time for 6 h, to Egyptian clover and maize bee pollen, then stored at ambient temperature for 6 months. We then determined the total phenolic content (TPC) and antioxidant activity of treated and non-treated pollen samples at 0, 3, and 6 months of storage. Total bacteria, mold, and yeast count were also evaluated at 0, 2, 4, and 6 months. Statistical analyses revealed that, TPC, antioxidant, and microbial load of both clover and maize pollen samples were significantly (p < 0.05) affected by both treatment and storage time and their interaction. Both methods were extremely effective at preserving the antioxidant properties of pollen samples after 6 months of storage at room temperature. Furthermore, the highest concentrations of both GI and OZ applications completely protected pollen samples from mold and yeast while decreasing bacterial contamination. GI at the highest dose (7.5 KGy) was found to be more effective than other GI doses and OZ application in preserving biologically active compounds and lowering the microbial count of pollen samples for 6 months. As a result, we advise beekeepers to use GI at this dose for longer-term storage.
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  • 文章类型: Journal Article
    草药香料由于其独特的香气和味道以及无数的经济和健康价值而被广泛用作食品添加剂。包括月桂叶在内的四种主要香料的香气特征,黑胡椒,辣椒,并使用HS-SPME/GC-MS对茴香进行了测试,以响应最广泛使用的香料加工方法,包括低剂量和高剂量的高压灭菌和γ辐射。此外,使用总需氧计数测试了加工对香料微生物污染的影响。GC-MS分析鉴定了月桂叶中的22种挥发物,34黑胡椒,23在辣椒中,和24茴香。所有确定的挥发物都属于氧化物/酚/醚,酯类,酮,酒精,倍半萜和单萜烃。大约在所有测试的香料中检测到高水平的氧化物/苯酚/醚。44、28.2、48.8、61.1%,在月桂叶,黑胡椒,辣椒,还有茴香,分别是总混合物,并表示它们作为香料的典型用途。总的氧化物/苯酚/醚显示,在暴露于γ辐射后,月桂叶从44%增加到47.5%,虽然高压灭菌后黑胡椒中的单萜烃从对照的11.4富集到高剂量和低剂量高压灭菌的65.9%和82.6%,分别。在月桂叶中检测到桉树脑的含量为17.9%,在高剂量高压灭菌和γ辐射(两种剂量)下,其含量增加了29-31%。高压灭菌和γ辐射均明显影响所检查香料的香气。Further,使用多变量数据分析(MVA)评估了响应处理的挥发性变化,揭示了与对照相比,高压灭菌和γ辐射样品之间的明显分离。在115°C下高压灭菌15分钟和10kGy辐射消除了所有测试香料中检测到的生物负载,即将微生物计数降低到检测限(<10cfu/g)以下。
    Herbal spices are widely consumed as food additives owing to their distinct aroma and taste as well as a myriad of economic and health value. The aroma profile of four major spices including bay leaf, black pepper, capsicum, and fennel was tested using HS-SPME/GC-MS and in response to the most widely used spices´ processing methods including autoclaving and γ-radiation at low and high doses. Additionally, the impact of processing on microbial contamination of spices was tested using total aerobic count. GC-MS analysis led to the identification of 22 volatiles in bay leaf, 34 in black pepper, 23 in capsicum, and 24 in fennel. All the identified volatiles belonged to oxides/phenols/ethers, esters, ketones, alcohols, sesquiterpene and monoterpene hydrocarbons. Oxides/phenol/ethers were detected at high levels in all tested spices at ca. 44, 28.2, 48.8, 61.1%, in bay leaves, black pepper, capsicum, and fennel, respectively of the total blend and signifying their typical use as spices. Total oxides/phenol/ethers showed an increase in bay leaf upon exposure to γ-radiation from 44 to 47.5%, while monoterpene hydrocarbons were enriched in black pepper upon autoclaving from 11.4 in control to reach 65.9 and 82.6% for high dose and low dose of autoclaving, respectively. Cineole was detected in bay leaf at 17.9% and upon exposure to autoclaving at high dose and γ-radiation (both doses) its level increased by 29-31%. Both autoclaving and γ-radiation distinctly affected aroma profiles in examined spices. Further, volatile variations in response to processing were assessed using multivariate data analysis (MVA) revealing distinct separation between autoclaved and γ-radiated samples compared to control. Both autoclaving at 115 °C for 15 min and radiation at 10 kGy eliminated detected bioburden in all tested spices i.e., reduced the microbial counts below the detection limit (< 10 cfu/g).
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  • 文章类型: Journal Article
    这项研究旨在关联引起龋齿的微生物负荷,乳酸估算,糖尿病和非糖尿病个体患龋风险高,健康个体患龋风险低。
    这项研究包括30名参与者,分为3组:A组,高风险龋齿糖尿病个体;B组,高风险龋齿非糖尿病个体;和C组,低风险龋齿个体。医疗状况,口腔卫生,并记录龋齿风险评估(美国牙科协会分类和国际龋齿检测和评估系统评分)。每个人的3毫升唾液的微生物负荷和乳酸分析如下:第一部分:2毫升微生物数量估计使用营养琼脂和血琼脂培养基,生化调查,和碳水化合物发酵试验;第二部分:使用分光光度分析进行乳酸估算的0.5mL。在选定的个人中,评估血型相关性。χ2检验,Kruskal-Wallis测试,和事后分析使用Dunn检验(p<0.05)。
    A组的微生物负荷和乳酸浓度最高,其次是B组和C组。唾液中的优势细菌是乳杆菌(63.00±15.49)和变形链球菌(76.00±13.90)。血型B在糖尿病和非糖尿病高危龋齿患者中普遍存在,但统计学上无统计学意义。
    由于高微生物负荷和乳酸产生增加,糖尿病个体更容易患龋齿。这些因素也降低了中性粒细胞的执行趋势,这加速了微生物的积累并增加了糖尿病个体患龋齿的风险。
    UNASSIGNED: This study aims to correlate caries-causing microorganism load, lactic acid estimation, and blood groups to high caries risk in diabetic and non-diabetic individuals and low caries risk in healthy individuals.
    UNASSIGNED: This study includes 30 participants divided into 3 groups: Group A, High-risk caries diabetic individuals; Group B, High-risk caries non-diabetic individuals; and Group C, Low-risk caries individuals. The medical condition, oral hygiene, and caries risk assessment (American Dental Association classification and International Caries Detection and Assessment System scoring) were documented. Each individual\'s 3 mL of saliva was analyzed for microbial load and lactic acid as follows: Part I: 2 mL for microbial quantity estimation using nutrient agar and blood agar medium, biochemical investigation, and carbohydrate fermentation tests; Part II: 0.5 mL for lactic acid estimation using spectrophotometric analysis. Among the selected individuals, blood group correlation was assessed. The χ2 test, Kruskal-Wallis test, and post hoc analysis were done using Dunn\'s test (p < 0.05).
    UNASSIGNED: Group A had the highest microbial load and lactic acid concentration, followed by Groups B and C. The predominant bacteria were Lactobacilli (63.00 ± 15.49) and Streptococcus mutans (76.00 ± 13.90) in saliva. Blood Group B is prevalent in diabetic and non-diabetic high-risk caries patients but statistically insignificant.
    UNASSIGNED: Diabetic individuals are more susceptible to dental caries due to high microbial loads and increased lactic acid production. These factors also lower the executing tendency of neutrophils, which accelerates microbial accumulation and increases the risk of caries in diabetic individuals.
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  • 文章类型: Journal Article
    医疗保健相关感染(HAIs)和抗菌素耐药性(AMR)对全球健康构成威胁。有效的手部卫生对于预防HAIs和AMR在医疗保健中的传播至关重要。我们旨在强调在医疗保健环境中手部卫生和基于酒精的手擦(ABHR)使用方面的最新进展和未来方向。2023年9月,42名感染预防和控制专家(IPC)在日内瓦举行的第三届国际预防和感染控制会议(ICPIC)ABHR工作组上召开会议,瑞士。本次会议的目的是提供最新证据的综合,并就实施有效的手部卫生实践的四个关键领域制定研究议程:(1)ABHR配方和手擦技术,(2)低资源环境和当地生产ABHR,(3)手卫生监测和技术创新,(4)手部卫生标准和准则。
    Healthcare-associated infections (HAIs) and antimicrobial resistance (AMR) pose threats to global health. Effective hand hygiene is essential for preventing HAIs and the spread of AMR in healthcare. We aimed to highlight the recent progress and future directions in hand hygiene and alcohol-based handrub (ABHR) use in the healthcare setting. In September 2023, 42 experts in infection prevention and control (IPC) convened at the 3rd International Conference on Prevention and Infection Control (ICPIC) ABHR Taskforce in Geneva, Switzerland. The purpose of this meeting was to provide a synthesis of recent evidence and formulate a research agenda on four critical areas for the implementation of effective hand hygiene practices: (1) ABHR formulations and hand rubbing techniques, (2) low-resource settings and local production of ABHR, (3) hand hygiene monitoring and technological innovations, and (4) hand hygiene standards and guidelines.
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  • 文章类型: Systematic Review
    全球可持续发展在满足不断增长的人口需求方面面临若干挑战。关于食品工业,满足这些需求的压力越来越大,导致废物产生增加。因此,认识到这些废物是宝贵的资源是至关重要的可持续模式整合到当前的生产系统。例如,目前,每年产生的240亿吨富含营养的牲畜废水(LW)可以通过微藻生物质通过生物吸收进行回收和增值。基于微藻的牲畜废水处理(MbLWT)已成为一种有效的养分回收技术,特别针对碳,氮,和磷。然而,这些系统的可行性和有效性依赖于LW的特性,包括有机物和铵的浓度,悬浮固体含量,和微生物负荷。因此,这篇系统的文献综述旨在为实施营养控制和恢复的整体MbLWT系统提供指导,讨论了文献中使用的几种预处理方法,以克服关于LW作为微藻培养的合适培养基的挑战。
    Global sustainable development faces several challenges in addressing the needs of a growing population. Regarding food industries, the heightening pressure to meet these needs has resulted in increased waste generation. Thus, recognising these wastes as valuable resources is crucial to integrating sustainable models into current production systems. For instance, the current 24 billion tons of nutrient-rich livestock wastewater (LW) generated yearly could be recovered and valorised via biological uptake through microalgal biomass. Microalgae-based livestock wastewater treatment (MbLWT) has emerged as an effective technology for nutrient recovery, specifically targeting carbon, nitrogen, and phosphorus. However, the viability and efficacy of these systems rely on the characteristics of LW, including organic matter and ammonium concentration, content of suspended solids, and microbial load. Thus, this systematic literature review aims to provide guidance towards implementing an integral MbLWT system for nutrient control and recovery, discussing several pre-treatments used in literature to overcome the challenges regarding LW as a suitable media for microalgae cultivation.
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  • 文章类型: Journal Article
    在过去的几十年里,对高质量食品的需求稳步增长。因此,必须开发创新技术,有效减少微生物负荷,同时最大限度地减少对香料质量的负面影响。这项研究的目的是确定使用受污染的孜然种子自行设计的非接触式感应加热系统的功效。非接触式感应加热净化过程是在Pyrex圆柱室中通过连续过程(螺旋输送机)在115、135和155°C的不同温度和持续时间(45、60和75s)下进行的。各种参数,包括微生物负荷,颜色特征,精油含量,表面形态,样品温度,和能源消耗作为研究中的因变量进行了分析。结果表明,处理组合(155°C-60s)将需氧板计数从6.21降低到2.97CFU/g。模具,处理组合(155°C-45s)中的酵母和大肠杆菌也减少了3.26和3.6CFU/g,分别。由于颜料在高温下的降解和变化,样品的总色差增加。然而,治疗组与对照组之间精油含量无统计学差异。确定孜然种子中精油成分的数量,以符合ISO标准,主要成分如下:松油烯-7-alγ(38.98%),孜然醛(20.75%),γ-萜品烯(18.81%),β-Pinene(13.66%),和p-Cymene(6.2%)。总之,非接触式感应加热系统有望成为香料表面去污的有效技术。获得的发现有助于更深入地了解感应加热过程对孜然种子的微生物污染水平和质量属性的影响。这种科学知识是在更大的工业规模上采用和集成该技术的基础框架。
    Over the past few decades, the demand for high-quality food has increased steadily. Therefore, it is essential to develop innovative technologies that effectively reduce microbial load while minimizing any negative effect on the quality of spices. The objective of this study was to determine the efficacy of a self-designed non-contact induction heating system using contaminated cumin seeds. The non-contact induction heating decontamination process was performed at different temperatures of 115, 135 and 155°C and durations (45, 60 and 75 s) through continuous process (screw conveyor) in Pyrex cylinder chamber. Various parameters including microbial load, color characteristics, essential oil content, surface morphology, sample temperature, and energy consumption were analyzed as dependent variables in the study. The results showed that the treatment combination (155°C - 60 s) reduced the aerobic plate count from 6.21 to 2.97 CFU/g. Mold, yeast and coliforms in the treatment combination (155°C-45 s) were also reduced by 3.26 and 3.6 CFU/g, respectively. The total color difference of the samples increased due to the degradation and alteration of pigments at high temperatures. However, no statistically significant disparity in essential oil content was observed between the treatment groups and the control group. The quantities of essential oil components in the cumin seeds were determined to align with the ISO standard, with the primary constituents identified as follows: Terpinen-7-al γ (38.98%), Cumin aldehyde (20.75%), γ-Terpinene (18.81%), β-Pinene (13.66%), and p-Cymene (6.2%). In summary, non-contact induction heating system shows promise as an effective technology for surface decontamination of spices. The acquired findings contribute to a deeper understanding of the impact of the induction heating process on both the microbial contamination levels and the quality attributes of cumin seeds. This scientific knowledge serves as a foundational framework for the prospective adoption and integration of this technology on a larger industrial scale.
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  • 文章类型: Journal Article
    Teff是在埃塞俄比亚广泛种植的无麸质谷物作物,是制造injera的关键成分,一个独特的面包。然而,有一个重要的问题,掺假的teff,影响其安全和质量。这项研究评估了经济驱动的掺假对画眉草谷物营养和微生物质量的影响。一项初步调查显示,在研究区域的整个供应链中,用廉价且不可食用的材料掺杂画眉草谷物是一种常见的做法。从生产者那里收集了一百三十份teff谷物样品,收藏家,整个卖家,以及Tulubolo和Jimma市的零售商确定存在的掺假物的类型和程度及其对谷物的营养和微生物质量的影响。将它们分别混合以创建代表不同供应链参与者的复合样本。使用标准方案来评估营养和微生物质量。结果表明,供应链参与者在识别的掺假方面存在显著差异,营养成分,和微生物质量。这项研究发现了谷壳,土壤+沙子,和dukkaa(从碾磨房屋和仓库中的画眉草屑谷物中分离出的非可食用物质的组合)作为重要的掺假品,平均范围为1.17-8.07%,1.29-7.23%,和8.93-37.13%。该研究还评估了从不同供应链参与者收集的teff样品的近似组成和微生物负荷。湿度值的范围,蛋白质,脂肪,灰,纤维,碳水化合物,能源为8.33-10.53%,6.49-9.42%,2.29-3.86%,2.33-6.39%,2.42-3.95%,70.9-73.76%,和333.52-361.9大卡,分别。微生物负荷显示总平板计数的范围为6.92-7.98、3.17-3.22、1.78-2.04、6.73-7.89和6.88-7.93logCFU/g,大肠杆菌,沙门氏菌,霉菌,和酵母,分别。结果显示,从生产者到Jimma零售商的画眉掺假增加,表明在整个供应链中存在多阶段掺假,对产品安全和质量构成威胁。该研究建议负责食品安全的机构之间进行良好的协调,生产者,和消费者有效缓解这一问题。
    Teff is a gluten-free cereal crop widely cultivated in Ethiopia and is a critical ingredient in making injera, a unique flatbread. However, there is a significant issue with adulteration of teff, impacting its safety and quality. This study evaluated economically-driven adulteration effects on teff grains\' nutritional and microbial quality. A preliminary survey revealed that it is a common practice to adulterate teff grains with inexpensive and inedible materials throughout the supply chain in the study area. One hundred and thirty teff grain samples were collected from producers, collectors, whole-sellers, and retailers in the cities of Tulu bolo and Jimma to determine the types and extents of adulterants present and their effect on the nutritional and microbial quality of the grains. They were mixed separately to create composite samples representing different supply chain actors. Standard protocols were used to evaluate nutritional and microbial quality. The results showed significant differences among the supply chain actors regarding identified adulterants, nutritional content, and microbial quality. The study identified chaff, soil + sand, and dukkaa (a combination of nonedible substances separated from teff grains in milling houses and warehouses) as the significant adulterants, with mean ranges of 1.17-8.07%, 1.29-7.23%, and 8.93-37.13% respectively. The study also evaluated the proximate composition and microbial load of the teff samples collected from different supply chain actors. The ranges of values for moisture, protein, fat, ash, fiber, carbohydrate, and energy were 8.33-10.53%, 6.49-9.42%, 2.29-3.86%, 2.33-6.39%, 2.42-3.95%, 70.9-73.76%, and 333.52-361.9 kcal, respectively. The microbial load showed ranges of 6.92-7.98, 3.17-3.22, 1.78-2.04, 6.73-7.89, and 6.88-7.93 log CFU/g for Total Plate Count, Escherichia coli, Salmonella, mold, and yeast, respectively. The results showed an increase in teff adulteration from producers to Jimma retailers, indicating multiple-stage adulteration throughout the supply chain, posing a threat to product safety and quality. The study recommends good coordination among the bodies responsible for food safety, producers, and consumers to mitigate this issue effectively.
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  • 文章类型: Journal Article
    使用露天干燥干燥的埃及Siwi日期暴露于不同的污染物。所以,目前的研究旨在使用封闭式太阳能干燥机来提高Siwi日期的安全性。洗涤和封闭式太阳能干燥对微生物负荷水平的影响,埃及锡威枣(ESD)中的黄曲霉毒素和重金属,与传统的开放式阳光干燥方法进行了比较。采用两种不同的干燥技术来干燥300kgESD。在两个干燥程序之后评估微生物负荷。使用高效液相色谱(HPLC)和电感耦合等离子体(ICP)技术分析了黄曲霉毒素和重金属的水平,分别,两种干燥方法后。此外,还使用标准方法评估了储存时间对ESD的微生物负荷的影响。目前的研究结果表明,封闭的太阳能干燥显著减少了96%和93%的细菌和真菌总数,分别,与开放式晒干相比。在新鲜的Siwi枣和使用封闭式太阳能干燥干燥的Siwi枣中均未检测到黄曲霉毒素。然而,露天晒干后,两种黄曲霉毒素;黄曲霉毒素B1(AFB1)和黄曲霉毒素G1(AFG1),在ESD中检测到,浓度分别为0.95和0.23μgkg-1。封闭的太阳能干燥显着降低了铅(Pb)的水平,镉(Cd),铜(Cu),镍(Ni),铬(Cr),锌(Zn),锰(Mn),干枣中的铁(Fe)占96%,94%,48%,71%,64%,4%,26%,7%,分别,相比于露天晒干。暴露于公开阳光干燥的储存的Siwi日期显示细菌(4.86logCFU/g)和真菌(4.46logCFU/g)计数的更高增加。然而,暴露于密闭太阳能干燥器的储存的Siwi日期显示细菌(3.21logCFU/g)和真菌(2.51logCFU/g)计数的增加较低。所以,与开放式太阳干燥相比,储存时间显着影响了封闭的太阳干燥日期的微生物负荷。总的来说,封闭式太阳能干燥降低了所研究污染物的水平,延长了ESD的保质期,从而提高人类消费的安全性。
    Egyptian Siwi dates dried using the open sun drying is exposed to different contaminants. So, the current study aims to use the closed solar dryer to improve Siwi date safety. The impact of washing and closed solar drying on the levels of microbial load, aflatoxins and heavy metals in Egyptian Siwi dates (ESD), in comparison to traditional open sun drying methods were examined. Two different drying techniques were employed to dry 300 kg of ESD. The microbial load was assessed following the two drying procedures. The levels of aflatoxins and heavy metals were analyzed using High-performance liquid chromatography (HPLC) and Inductively Coupled Plasma (ICP) techniques, respectively, after both drying methods. Additionally, the influence of storage time on the microbial load of the ESD was also evaluated using standard methods. The findings of the current study demonstrated that the closed solar drying significantly reduced the total bacterial and fungal counts by 96 % and 93 %, respectively, when compared to open sun-drying. No aflatoxins were detected in both fresh Siwi dates and Siwi dates dried using closed solar drying. However, after open sun drying, two aflatoxins; aflatoxin B1 (AFB1) and aflatoxin G1 (AFG1), were detected in the ESD, with concentrations of 0.95 and 0.23 μg kg-1, respectively. The closed solar drying significantly decreased the levels of lead (Pb), cadmium (Cd), copper (Cu), nickel (Ni), chromium (Cr), zinc (Zn), manganese (Mn), and iron (Fe) in the dried dates by 96 %, 94 %, 48 %, 71 %, 64 %, 4 %, 26 %, and 7 %, respectively, when compared to open sun drying. The stored Siwi dates that was exposed to the open sun drying showed a higher increase in bacterial (4.86 log CFU/g) and fungal (4.46 log CFU/g) counts. However, the stored Siwi dates that was exposed to the closed solar dryer showed a lower increase in bacterial (3.21 log CFU/g) and fungal (2.51 log CFU/g) counts. So, the duration of storage significantly impacted the microbial loads of the closed solar dried dates as compared to open sun drying. Overall, closed solar drying reduced the levels of investigated contaminants and extended the shelf life of ESD, thereby enhancing their safety for human consumption.
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