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首页> 外文期刊>The American Journal of Tropical Medicine and Hygiene >Variability in hand contamination based on serial measurements: implications for assessment of hand-cleansing behavior and disease risk.
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Variability in hand contamination based on serial measurements: implications for assessment of hand-cleansing behavior and disease risk.

机译：基于系列测量的手部污染变化：对手部清洁行为和疾病风险评估的意义。

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摘要

Measuring hand contamination at critical times, such as eating, can be challenging. We examined whether hand contamination measured at random, such as on arrival (initial), predicts contamination at critical times. Mothers of young children in Bangladesh rinsed both hands in 200 mL of Ringer's solution. We compared results of serial samples with respect to fecal coliform counts. Among 39 mothers, the geometric mean of fecal coliforms was 307 colony-forming units (cfu)/100 mL at initial collection and 3,001 cfu/100 mL during critical times (P = 0.0006). There was no correlation between initial and critical time fecal coliform counts (R = 0.13, P = 0.43). The mean difference between initial and critical time counts was 3.5 (standard deviation = 1.4) on the log base-10 scale. Contamination of the same subjects' hands varied substantially within a few hours. Because hand contamination measured at random cannot reliably predict hand contamination at times of potential pathogen transmission, single random hand rinses are not valid proxy measures for handwashing behavior.
机译：在关键时刻（如进食）测量手部污染可能具有挑战性。我们检查了随机测量的手部污染（例如到达时（初始））是否可以预测关键时刻的污染。孟加拉国的幼儿母亲用200毫升林格氏液冲洗双手。我们比较了粪便中大肠菌群计数的连续样本结果。在39名母亲中，粪大肠菌群的几何平均值在最初收集时为307个菌落形成单位（cfu）/ 100 mL，在关键时期为3,001 cfu / 100 mL（P = 0.0006）。粪便大肠菌群初始和关键时间之间没有相关性（R = 0.13，P = 0.43）。初始时间和关键时间计数之间的平均差为10（对数以10为底），标准差为1.4。同一受试者的手的污染在几个小时内变化很大。由于随机测量的洗手液污染不能可靠地预测潜在病原体传播时的洗手液污染，因此，单次随机洗手不是有效的替代方法，可用于洗手行为。

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