Pulmonary effects of intermittent,seasonal exposure to high concentrations of cotton dust

Esmaeel Soleimani; Masoud Neghab; Morteza Nowroozi-Sarjoeye

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Pulmonary effects of intermittent,seasonal exposure to high concentrations of cotton dust

Pulmonary effects of intermittent,seasonal exposure to high concentrations of cotton dust

作者：

Esmaeel Soleimani Masoud Neghab Morteza Nowroozi-Sarjoeye

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Cotton

dust

BIOAEROSOLS

Byssinosis

Lungs’functional

IMPAIRMENTS

RESPIRATORY

SYMPTOMS

摘要：

AIM:To quantify the exposure levels and to assess pulmonary reactions associated with exposure to cotton dust and its biological contaminants.METHODS:All employees(51 male workers)of a ginning industry as well as 51 referent unexposed subjects from clerical staff of an educational center were investigated.Atmospheric concentrations of cotton dust and bioaerosols were measured.Furthermore,bacterial and fungal genera and species were identified by an expert microbiologist and an experienced mycologist.A standard respiratory symptom questionnaire was filled out for the subjects and they underwent multiple spirometry tests,at the beginning and at the end of work season as well as prior to(pre-exposure base line values)and at end of the first shift of workweek(post exposure).RESULTS:Gram negative bacteria including Enterobacter agglomerans and Pseudomonas spp.were found to be the dominant bacterial species and genera,respectively.Similarly,dominant fungi were identified to be Mucor sp.Rhizopus sp.and Aspergillus niger.Mean atmospheric concentrations of cotton dust in ginning and outdoor areas were found to be 35.2 and 6.8 mg/m3,respectively.The prevalence rates of cough,phlegm,wheezing,dyspenea and grade 1/2 byssinosis among the exposed subjects were significantly higher than their corresponding values for the unexposed employees(P<0.05).Additionally,significant differences were noted in the mean baseline value(preshift)of vital capacity,forced expiratory volume in the first second(FEV1)and FEV1/forced vital capacity ratio of the exposed subjects when compared with those of their referent counterparts.Similarly,significant cross shift decrements were noted in most parameters of pulmonary function of the exposed subjects.CONCLUSION:Seasonal exposure to cotton dust induces both acute,partially reversible,and chronic irreversible decrements in the lungs’functional capacities as well as increased prevalence of respiratory symptoms.

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篇名	Pulmonary effects of intermittent,seasonal exposure to high concentrations of cotton dust
来源期刊	世界呼吸病学杂志	学科	医学
关键词	Cotton dust BIOAEROSOLS Byssinosis Lungs’functional IMPAIRMENTS RESPIRATORY SYMPTOMS
年，卷（期）	2016,（1）	所属期刊栏目
研究方向		页码范围	24-32
页数	9页	分类号	R
字数		语种
DOI