Nutrient deficiency

营养缺乏
  • 文章类型: Journal Article
    在了解阿富汗少女营养缺乏与粮食不安全之间的关系方面存在研究空白。这项研究的目的是调查喀布尔初中和高中女孩的营养缺乏与粮食不安全之间的关系。我们对380名随机选择的6-12年级公立学校的11-18岁女孩进行了横断面研究。我们评估了女孩的食物不安全,食物和营养摄入,社会经济地位,和身体活动。使用营养学家IV软件计算营养素消耗。统计分析,包括单向方差分析,卡方检验,和t检验,用于评估饮食摄入与食物不安全之间的关系。超过一半(52.9%)的参与者食物不安全,35.8%的人经历饥饿,17.1%的人没有饥饿。维生素B3,C,硒,铁的灵敏度最高,特异性,和准确性,是有和没有饥饿的粮食不安全的最佳指标。最普遍的营养缺乏是维生素B9和E,钙,镁,锌的不足。粮食安全与水果呈正相关,维生素E和K,乳制品(例如,牛奶,酸奶,和奶酪),肉类产品(例如,鸡肉,肉,红肉,和鸡蛋),和坚果摄入量。我们的研究结果表明,喀布尔的青春期女孩可能会受益于富含营养的食物计划,如B9和E,钙,镁,还有锌,被发现是最普遍的营养缺乏。这些调查结果强调了解决阿富汗少女粮食不安全和营养缺乏的重要性。
    There is a research gap in understanding the relationship between nutrient deficiency and food insecurity among adolescent girls in Afghanistan. The objective of this study was to investigate the associations between nutrient deficiencies and food insecurity among middle and high school-aged girls in Kabul. We conducted a cross-sectional study of 380 randomly selected 11-18-year-old girls attending public schools in grades 6-12. We assessed girls\' food insecurity, food and nutrient intake, socioeconomic status, and physical activity. Nutrient consumption was calculated using Nutritionist IV software. Statistical analyses, including one-way analysis of variance, Chi-square tests, and t-tests, were used to assess the association between dietary intake and food insecurity. More than half (52.9%) of the participants were food insecure, with 35.8% experiencing hunger and 17.1% without hunger. Vitamin B3, C, selenium, and iron had the highest sensitivity, specificity, and accuracy and were the best indicators of food insecurity with and without hunger. The most prevalent nutrient deficiencies were vitamin B9 and E, calcium, magnesium, and zinc inadequacies. Food security was positively associated with fruit, vitamins E and K, dairy products (e.g., milk, yogurt, and cheese), meat products (e.g., chicken, meat, red meat, and egg), and nut intake. Our findings suggest that adolescent girls in Kabul may benefit from food programs that enrich nutrients such as B9 and E, calcium, magnesium, and zinc, which were found to be the most prevalent nutrient deficiencies. These findings highlight the importance of addressing food insecurity and nutrient deficiencies among adolescent girls in Afghanistan.
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  • 文章类型: Meta-Analysis
    通过参与各种生态生理过程,大量营养素和微量营养素对于树木的生长发育至关重要。然而,树木的营养状况对其抵御干旱引起的死亡率的能力的影响仍然没有定论。因此,我们进行了全面的荟萃分析,从44种出版物中收集11种必需营养素的数据(493种独立观察)。此外,在瑞士南部的“Visp”森林中,对不同干旱引起的活力丧失的樟子松进行了实地研究。在树木死亡期间,未观察到树木营养状况的持续下降。荟萃分析显示叶片钾(K)显着降低,铁(Fe),和铜(Cu)浓度与树木死亡率有关。然而,实地研究表明,营养水平与树木的活力状况之间没有因果关系。这种差异主要归因于两种类型的实验设计和目标树的个体发育阶段的内在差异。在非田间条件下,主要观察到树木死亡之前的养分减少,这项研究是在根系不发达的幼苗和树苗上进行的。它限制了这些幼树在干旱期间的养分吸收能力。此外,树木的营养反应也受许多变量的影响。具体来说,(a)叶片养分比其他器官更容易受到干旱胁迫;(b)在干旱引起的死亡期间,常绿树种的养分浓度降低更为普遍;(c)在所有生物群落中,地中海森林最容易遭受干旱引起的营养缺乏;(d)土壤类型影响树木营养反应的方向和程度。我们确定了影响树木营养状况和干旱生存之间关系的因素,并提出了即将到来的树木死亡率的潜在预警指标,例如,K浓度降低,活力下降。这些发现有助于我们了解树木对干旱的反应,并为全球变化背景下的森林管理战略提供了实际意义。
    Both macronutrients and micronutrients are essential for tree growth and development through participating in various ecophysiological processes. However, the impact of the nutritional status of trees on their ability to withstand drought-induced mortality remains inconclusive. We thus conducted a comprehensive meta-analysis, compiling data on 11 essential nutrients from 44 publications (493 independent observations). Additionally, a field study was conducted on Pinus sylvestris L. trees with varying drought-induced vitality loss in the \"Visp\" forest in southern Switzerland. No consistent decline in tree nutritional status was observed during tree mortality. The meta-analysis revealed significantly lower leaf potassium (K), iron (Fe), and copper (Cu) concentrations with tree mortality. However, the field study showed no causal relationships between nutritional levels and the vitality status of trees. This discrepancy is mainly attributed to the intrinsic differences in the two types of experimental designs and the ontogenetic stages of target trees. Nutrient reductions preceding tree mortality were predominantly observed in non-field conditions, where the study was conducted on seedlings and saplings with underdeveloped root systems. It limits the nutrient uptake capacity of these young trees during drought. Furthermore, tree nutritional responses are also influenced by many variables. Specifically, (a) leaf nutrients are more susceptible to drought stress than other organs; (b) reduced tree nutrient concentrations are more prevalent in evergreen species during drought-induced mortality; (c) of all biomes, Mediterranean forests are most vulnerable to drought-induced nutrient deficiencies; (d) soil types affect the direction and extent of tree nutritional responses. We identified factors that influence the relationship between tree nutritional status and drought survival, and proposed potential early-warning indicators of impending tree mortality, for example, decreased K concentrations with declining vitality. These findings contribute to our understanding of tree responses to drought and provide practical implications for forest management strategies in the context of global change.
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  • 文章类型: Journal Article
    橄榄油厂废水(OMW)是橄榄油生产商地区的环境问题,因为它在农业土壤中用作有机改良剂。然而,OMW也可以用作有机肥料,由于其高有机质和营养水平,但它的使用,当它在没有环境管理的情况下发生时,会对土壤和水域造成严重的环境影响。这项工作评估了不同OMW水平对小麦生长的农业Vertisol的一组物理化学参数的影响(TriticumaestivumLvar。杜马1)。在两个土壤深度(0-30和30-60cm)和两个生长季节添加不同水平的OMW(0、5、10和15Lm-2)之前,进行了一组物理化学参数,以确定:i)OMW处理对所研究的物理化学土壤性质(容重,土壤孔隙度,土壤pH值,电导率和有机物),ii)可用主(N,P,K)和次要常量营养素(Ca,Mg和Na),ii)微量营养素(CuFe,Mn和Zn),和iv)可用重金属(Cd和Pb)。结果表明,土壤理化参数略有改善,主要是由于有机物的改善,大量和微量营养素,通常与橄榄厂废水剂量成比例。镉和铅在允许范围内。增加的OMW对不同元素的土壤营养平衡有不同的行为,导致营养失衡,虽然在某些情况下,他们得到了改善。然而,植物生长没有受到影响,在10Lm-2和15Lm-2剂量下有所改善。结果提供了有关使用OMW作为农作物有机肥料及其对土壤性质的潜在影响的有价值的数据。
    Olive oil mill wastewater (OMW) is an environmental concern in olive oil producers\' regions due to its use in agricultural soils as an organic amendment. However, OMW can also be used as organic fertilizer due to their high organic matter and nutrient levels, but its use, when it occurs without environmental management, can cause serious environmental implications for soils and waters. This work evaluated the impact of different OMW levels on a set of physicochemical parameters from an agricultural vertisol where wheat grew (Triticum aestivum L var. Douma 1). A set of physicochemical parameters were conducted before adding different levels of OMW (0, 5, 10 and 15 L m-2) at two soil depths (0-30 and 30-60 cm) and for the two growing seasons to determine: i) the effect of OMW treatments on the studied physicochemical soil properties (bulk density, soil porosity, soil pH, electrical conductivity and organic matter), ii) available primary (N, P, K) and secondary macronutrients (Ca, Mg and Na), ii) micronutrients (Cu Fe, Mn and Zn), and iv) available heavy metals (Cd and Pb). The results indicated that soil physicochemical parameters were slightly improved, mainly due to improvement in organic matter, macro- and micronutrients, usually proportionally to the olive mill wastewater dose. Cadmium and Pb were within the permissible limits. The increased OMW had different behaviour on the soil nutritional balances of different elements, leading to nutrient imbalances, although in some cases, they were improved. However, the plant growth was not affected, and it was improved under 10 L m-2 and 15 L m-2 doses. The results offer valuable data about the use of OMW as organic fertilizer for crops and their potential impact on soil properties.
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  • 文章类型: Journal Article
    这项研究的目的是调查非裔美国人I级运动员的低能量可用性(LEA)和营养含量与高血压(HBP)之间的关系。招募了23名D1非裔美国人季前运动员参加。HBP定义为收缩压(BP)>120,舒张压<80。运动员使用非连续的3天食物召回自我报告营养摄入量,然后由运动营养师进行审查。LEA被评估为总能量摄入-总每日能量消耗(TDEE),这是预测的。此外,对微量营养素进行了评估。统计分析依赖于斯皮尔曼相关性(R),具有95%置信区间的标准化平均差,平均值±SD,和赔率比(OR)。相关值被分类为:0.20-0.39=低;0.40-0.69=中等;0.70-1.0=强。在HBP和LEA之间观察到中等关系(R=0.56),其中14/23具有HBP。在接受HBP观察的14名运动员中,78.5%(11/14)的热量不足(-529±695kcal),OR为7.2。23名HBP运动员中普遍存在微量营养素摄入不足:多不饱和脂肪酸-29.6%;omega-3-26.0%;铁-46.0%;钙-25.1%;和钠-14.2%,在其他人中。LEA和微量营养素缺乏可能导致黑人D1运动员的HBP,这已被证明是降低心源性猝死风险的最常见的可改变的危险因素。
    The purpose of this study was to investigate the relationship between low energy availability (LEA) and nutritional content with high blood pressure (HBP) in African American Division I athletes. Twenty-three D1 African American pre-season athletes were recruited to participate. HBP was defined as >120 systolic blood pressure (BP) and <80 diastolic BP. Athletes self-reported nutritional intake using a non-consecutive 3-day food recall which was then reviewed by a sports dietitian. LEA was evaluated as total energy intake-total daily energy expenditure (TDEE), which was predicted. Additionally, micronutrients were evaluated. A statistical analysis relied on Spearman correlation (R), standardized mean difference with 95% confidence interval, mean ± SD, and odds ratios (OR). Correlation values were categorized: 0.20-0.39 = low; 0.40-0.69 = moderate; 0.70-1.0 = strong. A moderate relationship was observed between HBP and LEA (R = 0.56) with 14/23 having HBP. Of the 14 athletes observed with HBP, 78.5% (11/14) were calorically deficient (-529 ± 695 kcal) with an OR of 7.2. Micronutrient intake deficiencies were ubiquitous among the 23 HBP athletes: poly-unsaturated fatty acid -29.6%; omega-3 -26.0%; iron -46.0%; calcium -25.1%; and sodium -14.2%, amongst others. LEA and micronutrient deficiencies may contribute to HBP in Black D1 athletes, which has been shown to be the most common modifiable risk factor to decrease the risk of sudden cardiac death.
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  • 文章类型: Journal Article
    背景:研究营养对抑郁症的影响通常是通过检查单一营养素和饮食方式的影响来进行的(例如:素食主义者,地中海)。本研究是第一个确定美国人口中营养缺乏模式的影响并研究其对抑郁症的影响的研究。
    方法:数据来自国家健康和营养调查(NHANES)。进行潜在类别分析以确定营养缺乏的同质组。进行了3步分析,以建立抑郁严重程度的类别依赖性差异。BCH分析揭示了抑郁症的独特预测因素,取决于最可能的类别。
    结果:分析显示4类营养缺乏。镁和膳食纤维的认可程度最低。“缺乏营养”的个体表现出最高的抑郁严重程度(平均值=4.137,SD=0.337)。不同的社会经济和人为预测因子预测了概况,满足最低卡路里,显示出最大的不被营养剥夺的可能性(OR在5.44和11.11之间)。总的来说,年龄(β=-0.115,p≤0.01)和收入(β=-0.147,p≤0.01)是最强的保护因素,而女性(β=0.128,p≤0.01)和关节炎(β=0.130,p≤0.01)是最强的危险因素。
    结论:该研究涉及基于每日最低摄入量的二元变量,没有考虑超过最低推荐剂量的积极影响。
    结论:该研究支持良好营养与抑郁之间存在负相关的观点。寻找抑郁症状的独特风险因素支持营养缺乏分析的效用。
    BACKGROUND: Research into the effects of nutrition on depression is often performed by examining the effects of singular nutrients and dietary styles (e.g.: vegan, Mediterranean). The present study is the first one to establish the effects of patterns of nutritional deficiency within the American population and examines their effects on depression.
    METHODS: Data was drawn from National Health and Nutrition Examination Survey (NHANES). Latent class analysis was performed to identify homogeneous groups of nutrient deficiency. A 3-step analysis was performed to establish class-dependant differences in depression severity. BCH analysis revealed unique predictors of depression dependant on most probable class.
    RESULTS: Analysis revealed 4 classes of nutrient deficiency. Magnesium and dietary fibre were the least endorsed. \'Nutrient deprived\' individuals showed the highest depression severity (Mean = 4.137, SD = 0.337). Profiles were predicted by different socioeconomic and anthropogenic predictors with meeting minimum calories showing the strongest odds of not being nutrient deprived (OR between 5.44 and 11.11). Overall, age (β = -0.115, p ≤ 0.01) and income (β = -0.147, p ≤ 0.01) were the strongest protecting factors while being female (β = 0.128, p ≤ 0.01) and arthritis (β = 0.130, p ≤ 0.01) were the strongest risk factors.
    CONCLUSIONS: The study involved binary variables based on minimum daily intakes and did not account for positive effects of exceeding minimum recommended doses.
    CONCLUSIONS: The study supports the notion of a negative relationship between good nutrition and depression. Finding unique risk factors for depression symptoms supports the utility of nutrient deficiency profiling.
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  • 文章类型: Journal Article
    目标:这是一项试点研究,旨在评估减肥患者在手术前的生化和历史信息,目的是确定2015年至2020年的营养缺乏及其患病率。方法:收集247例患者的临床资料,男105例,女142例。维生素,微量元素,电解质,白蛋白,球蛋白,血红蛋白,叶酸,铁蛋白,微量白蛋白尿(MAU),和甲状旁腺激素(PTH)水平进行测定,以根据性别探索营养状况,年龄,高体重指数(BMI),和腰部环境(WC)。结果:平均年龄,平均BMI,候选人的平均WC为32.95±10.46岁,38.01±7.11kg/m2,117.04±16.18cm,分别。25(OH)维生素D的术前营养缺乏率为76.88%,球蛋白19.84%,白蛋白11.74%,钠11.02%,叶酸为8.33%,氯化物占10.48%(男性)和6.34%(女性),4.05%的钙,铁蛋白为3.07%(男性)和0.70%(女性),PTH升高11.90%,MAU为44.96%。相对于女性,男性的球蛋白和MAU患病率增加(P<0.05)。老年组更有可能出现白蛋白缺乏(P=0.007),球蛋白缺乏(P=0.003),缺锌(P=0.015)。此外,25(OH)D缺乏和白蛋白缺乏在BMI≥47.5kg/m2的患者中更为常见(分别为P=0.049和0.015)。较宽的WC(≥150cm)显示出更高的白蛋白缺乏率(P=0.011)。结论:中国南方减肥手术前患者普遍存在电解质和营养缺乏。应在该人群中进行电解质和营养水平的常规评估。
    Objective: The was a pilot study to assess the biochemical and historical information about bariatric patients before undergoing the surgery in the aim of identifying nutritional deficiencies and their prevalence from 2015 to 2020. Methods: Clinical data of 247 patients (105 males and 142 females) were included. Vitamins, trace elements, electrolytes, albumin, globulin, hemoglobin, folate, ferritin, microalbuminuria (MAU), and parathyroid hormone (PTH) levels were determined to explore the nutritional status according to gender, age, high body mass index (BMI), and waist circumstance (WC). Results: The mean age, mean BMI, and mean WC of the candidates were 32.95 ± 10.46 years, 38.01 ± 7.11 kg/m2, and 117.04 ± 16.18 cm, respectively. The prevalence of preoperative nutritional deficiencies was 76.88% for 25 (OH) vitamin D, 19.84% for globulin, 11.74% for albumin, 11.02% for sodium, 8.33% for folic acid, 10.48% (male) and 6.34% (female) for chloride, 4.05% for calcium, 3.07% (male) and 0.70%(female) for ferritin, 11.90% for elevated PTH, and 44.96% for MAU. Males exhibited increased prevalence of globulin and MAU relative to females (P < 0.05). Older groups are more likely to exhibit albumin deficiency (P = 0.007), globulin deficiency (P = 0.003), and zinc deficiency (P = 0.015). In addition, 25 (OH) D deficiency and albumin deficiency were more common in patients with BMI ≥ 47.5 kg/m2 (P = 0.049 and 0.015, respectively). Wider WC (≥150 cm) exhibited higher rates of albumin deficiencies (P = 0.011). Conclusion: Electrolyte and nutritional deficiencies were common in patients prior to bariatric surgery in South China. Routine evaluation of electrolyte and nutritional levels should be carried out in this population.
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  • 文章类型: Journal Article
    背景:已知缺铁是最常见的营养障碍。世界上大约30%的人口缺铁(ID)。女性比男性更容易患贫血,这是一个流行病的公共卫生问题。
    目的:进行了一项横断面研究,以调查利雅得非妊娠妇女的贫血患病率和相关危险因素。沙特阿拉伯。
    方法:本研究涉及年龄在20-65岁的非妊娠妇女(n=250)。社会人口统计学,营养状况,月经史,计算人体测量学和血液学特性。贫血代理,包括血红蛋白(HB),血清铁蛋白(IDA),血细胞比容(Hct),平均红细胞体积(MCV),测定平均红细胞血红蛋白(MCH)和平均红细胞血红蛋白浓度(MCHC)以及BMI.
    结果:受访者根据人口统计学因素和贫血代理因素而有所不同,他们中的大多数患有贫血。学生t检验分析表明,平均每日食物摄入量低于饮食需求摄入量(DRI)。社会人口统计学因素与贫血代理之间的相关性和逻辑回归分析显示,大多数此类因素对贫血代理具有显着负面影响。此外,每日食物摄入量和贫血指标的相关性表明,负责改善贫血指标的营养素没有摄入足够的量,这表明存在显著的正相关。
    结论:结论:各种因素,包括人口因素,每日食物摄入似乎与贫血代理有关,这是利雅得非孕妇贫血最重要的危险因素,沙特阿拉伯。
    BACKGROUND: Iron deficiency is known to be the most common nutritional disorder. About 30% of the world\'s population is iron deficient (ID). Women are more likely to be exposed to anemia than men, which is an epidemic public health problem.
    OBJECTIVE: A cross-sectional study was carried out to investigate the prevalence of anemia and associated risk factors among non-pregnant women in Riyadh, Saudi Arabia.
    METHODS: Non-pregnant women (n = 250) aged 20-65 years were involved in this study. Sociodemographic, nutritional status, menstrual history, anthropometric and haematological properties were calculated. Anaemia proxies including haemoglobin (HB), serum ferritin (IDA), Haematocrit (Hct), mean corpuscular volume (MCV), mean corpuscular haemoglobin (MCH) and mean corpuscular haemoglobin concentration (MCHC) were determined as well as BMI.
    RESULTS: The respondents were varied according to demographic factors and according to anemia proxies, the majority of them suffered from anemia. The Student\'s t-test analysis showed that the average daily food intake was lower than that of the dietary requirement intake (DRI). Correlation and logistic regression analysis between sociodemographic factors and anemia proxies revealed that most of such factors significantly and negatively affected anemia proxies. Moreover, the correlation of daily food intake and anemia proxies showed that the nutrients responsible for the improvement of anemia proxies were not taken in sufficient amount as indicated by a significant and positive correlation.
    CONCLUSIONS: In conclusion, various factors including demographic factors, daily food intake appeared to be associated with anemia proxies, which are the most important risk factor for anemia among non-pregnant women in Riyadh, Saudi Arabia.
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  • 文章类型: Journal Article
    腹腔镜Roux-en-Y胃旁路术(RYGB)被认为是病态肥胖手术治疗的“金标准”。假设减少普通肢体的长度会积极影响体重减轻的程度和保持,但也可能会带来营养不良的风险。这项研究的目的是比较患者的营养和维生素缺乏标准RYGB与很长的Roux肢体RYGB(VLRL-RYGB)。本研究是多中心随机对照试验(荷兰公共频道试验)的一部分,包括444例接受RYGB或VLRL-RYGB的患者。实验室结果,在基线和术后1年收集了复合维生素补充剂的使用和再次手术.主要结果指标是术后1年后的营养缺乏。次要结果指标是由于吸收不良引起的再手术率。总的来说,227例患者接受RYGB,196例患者接受VLRL-RYGB。术后1年最常见的缺陷是铁蛋白(17·2-18·2%),铁(23·4-35·6%),K(7·4-15·2%),维生素B12(9·0-9·9%)和维生素D(22·7-34·5%)。接受VLRL-RYGB的患者钙水平略有降低,Fe和维生素D与术后1年接受RYGB的患者相比,但叶酸和钠的含量明显较高。RYGB(2/227,0·9%)和VLRL-RYGB(7/196,3·6%)由于吸收不良引起的再手术率没有显着差异(P=0·088)。我们得出的结论是,接受VLRL-RYGB的患者的Ca水平显着降低,Fe和维生素D与术后1年接受RYGB的患者相比,但叶酸和钠含量较高.再手术率没有差异。对接受VLRL-RYGB的患者应密切监测营养缺乏。
    Laparoscopic Roux-en-Y gastric bypass (RYGB) is considered the \'gold standard\' for surgical treatment of morbid obesity. It is hypothesised that reducing the length of the common limb positively affects the magnitude and preservation of weight loss but may also impose a risk of malnutrition. The aim of this study was to compare patients\' nutrient and vitamin deficiencies in standard RYGB with a very long Roux limb RYGB (VLRL-RYGB). This study was part of the multicentre randomised controlled trial (Dutch Common Channel Trial), including 444 patients undergoing an RYGB or a VLRL-RYGB. Laboratory results, use of multivitamin supplements and reoperations were collected at baseline and 1 year postoperative. Primary outcome measure was nutrient deficiency after 1 year postoperative. Secondary outcome measure was the reoperation rate due to malabsorption. In total, 227 patients underwent RYGB and 196 patients underwent VLRL-RYGB. Most common deficiencies at 1 year postoperative were ferritin (17·2-18·2 %), Fe (23·4-35·6 %), K (7·4-15·2 %), vitamin B12 (9·0-9·9 %) and vitamin D (22·7-34·5 %). Patients undergoing VLRL-RYGB had slightly but significantly lower levels of Ca, Fe and vitamin D compared with those undergoing RYGB at 1 year postoperative, but significantly higher levels of folic acid and Na. Reoperation rates due to malabsorption were not significantly different between RYGB (2/227, 0·9 %) and VLRL-RYGB (7/196, 3·6 %) (P = 0·088). We concluded that patients undergoing VLRL-RYGB had significantly lower levels of Ca, Fe and vitamin D compared with those undergoing RYGB at 1 year postoperative, but higher levels of folic acid and Na. Reoperation rates did not differ. Close monitoring on nutrient deficiencies should be performed in patients undergoing VLRL-RYGB.
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  • 文章类型: Journal Article
    随着即食食品消费的增加,对单核细胞增生李斯特菌食品污染的担忧正在上升。单核细胞增生李斯特菌的生物膜生产被认为是赋予其在食物链中增加的抗性和持久性的方式之一。在这项研究中,来自食品和食品加工环境(FPE)的分离物集合,代表持久性,普遍,在不同的环境条件下,评估了很少检测到的基因型的生物膜形成能力,包括粘附和固着生物量的产生。固着生物量的数量根据生长条件而变化,血统,血清型和基因型,但在低温下证明了克隆复合物(CC)26基因型与生物膜产生的关联。总的来说,每个菌株的相对生物膜生产率在生长条件下不一致地变化。在我们的实验条件下,生物膜形成效率与持续性或流行基因型之间没有明显关联.不同的外在因素影响生物膜形成的具体步骤。突然的营养剥夺会增强细胞粘附,而长期的营养缺乏会阻碍生物膜的成熟。盐的添加增加了生物膜的产生,此外,营养限制补充盐显著刺激生物膜的形成。泛全基因组关联研究(Pan-GWAS)首次评估了生物膜表型的遗传组成。报告的基因数量因生长条件而异,常见基因的数量较少。然而,本体内容的广泛概述揭示了相似的模式,无论条件如何。功能分析显示,与转化/能力和包括Internalins在内的表面蛋白相关的功能高度丰富。
    Concerns about food contamination by Listeria monocytogenes are on the rise with increasing consumption of ready-to-eat foods. Biofilm production of L. monocytogenes is presumed to be one of the ways that confer its increased resistance and persistence in the food chain. In this study, a collection of isolates from foods and food processing environments (FPEs) representing persistent, prevalent, and rarely detected genotypes was evaluated for biofilm forming capacities including adhesion and sessile biomass production under diverse environmental conditions. The quantity of sessile biomass varied according to growth conditions, lineage, serotype as well as genotype but association of clonal complex (CC) 26 genotype with biofilm production was evidenced under cold temperature. In general, relative biofilm productivity of each strain varied inconsistently across growth conditions. Under our experimental conditions, there were no clear associations between biofilm formation efficiency and persistent or prevalent genotypes. Distinct extrinsic factors affected specific steps of biofilm formation. Sudden nutrient deprivation enhanced cellular adhesion while a prolonged nutrient deficiency impeded biofilm maturation. Salt addition increased biofilm production, moreover, nutrient limitation supplemented by salt significantly stimulated biofilm formation. Pan-genome-wide association study (Pan-GWAS) assessed genetic composition with regard to biofilm phenotypes for the first time. The number of reported genes differed depending on the growth conditions and the number of common genes was low. However, a broad overview of the ontology contents revealed similar patterns regardless of the conditions. Functional analysis showed that functions related to transformation/competence and surface proteins including Internalins were highly enriched.
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  • 文章类型: Journal Article
    Suboptimal intake of nutrients is associated with adverse health outcomes. The current study investigated the risk of suboptimal macro and micronutrient intake and their potential determinants in a cross-sectional study of community-dwelling older Danish adults (65⁻81 years). Nutrient intake was obtained through a 3-day weighted dietary record and information on personal characteristics and attitudes towards specific foods and dietary habits and nutrition through questionnaires. Dietary Reference Values (DRV) from the Nordic Nutrition Recommendations were used for the assessment. Among 157 participants, 68% and 66% had risk of suboptimal intake of dietary fiber and saturated fatty acids (SFA). For mono-unsaturated fatty acids (MUFA) and poly-unsaturated fatty acids (PUFA), the numbers were 47% and 62%, respectively. Increased risk of suboptimal protein intake was estimated in 3 to 45% of the participants, depending on the criteria used for the DRV and of the mode of expressing protein intake. Fifty percent had intakes of alcohol above the maximum recommended intake. Risk of micronutrient inadequacy was particularly high for vitamin D and thiamine (80 and 45%, respectively). Total energy intake and attitude regarding healthy eating were associated with lower nutrient intake. The current study illustrates that there is room for improvements in the dietary quality of community dwelling older Danish adults.
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