Department of Physiotherapy, Communication Science and Disorders, Occupational Therapy, LIM 34, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil.
Environ Res. 2011 Jul;111(5):664-9. doi: 10.1016/j.envres.2011.03.006. Epub 2011 Mar 29.
Biofuel from sugarcane is widely produced in developing countries and is a clean and renewable alternative source of energy. However, sugarcane harvesting is mostly performed after biomass burning. The aim of this study was to evaluate the effects of harvesting after biomass burning on nasal mucociliary clearance and the nasal mucus properties of farm workers.
Twenty seven sugarcane workers (21-45 years old) were evaluated at the end of two successive time-periods: first at the end of a 6-month harvesting period (harvesting), and then at the end of a 3-month period without harvesting (non-harvesting). Nasal mucociliary clearance was evaluated by the saccharine transit test, and mucus properties were analyzed using in vitro mucus contact angle and mucus transportability by sneeze. Arterial blood pressure, heart rate, respiratory rate, pulse oximetry, body temperature, associated illness, and exhaled carbon monoxide were registered.
Data are presented as mean values (95% confidence interval). The multivariate model analysis adjusted for age, body-mass index, smoking status and years of working with this agricultural practice showed that harvesting yielded prolonged saccharine transit test in 7.83 min (1.88-13.78), increased mucus contact angle in 8.68 degrees (3.18-14.17) and decreased transportability by sneeze in 32.12 mm (-44.83 to -19.42) compared with the non-harvesting period. No significant differences were detected in any of the clinical parameter at either time-period.
Sugarcane harvesting after biomass burning negatively affects the first barrier of the respiratory system in farm workers by impairing nasal mucociliary clearance and inducing abnormal mucus properties.
甘蔗生物燃料在发展中国家广泛生产，是一种清洁可再生的能源替代物。然而，甘蔗收割大多是在生物质燃烧之后进行的。本研究旨在评估生物质燃烧后收割对农场工人鼻黏膜纤毛清除功能和鼻黏液特性的影响。
在连续两个时间段结束时，对 27 名甘蔗工人（21-45 岁）进行评估：首先是在 6 个月的收割期结束时（收割期），然后是在 3 个月的无收割期结束时（非收割期）。通过蔗糖转运试验评估鼻黏膜纤毛清除功能，通过体外黏液接触角和黏液喷嚏传输性分析黏液特性。记录动脉血压、心率、呼吸频率、脉搏血氧饱和度、体温、相关疾病和呼出的一氧化碳。
数据以平均值（95%置信区间）表示。多元模型分析调整了年龄、体重指数、吸烟状况和从事这种农业实践的年限，结果显示，与非收割期相比，收割期蔗糖转运试验延长了 7.83 分钟（1.88-13.78），黏液接触角增加了 8.68 度（3.18-14.17），喷嚏传输性降低了 32.12 毫米（-44.83 至-19.42）。在任何时间段，临床参数均无显著差异。
生物质燃烧后甘蔗收割会损害农场工人的鼻黏膜纤毛清除功能，并导致异常的黏液特性，从而对呼吸系统的第一道防线产生负面影响。
