الفهرس 
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Abstract
The industrial population is exposed to various types of pollutants present in their working environment leading to occupational diseases.
Wool textile workers are exposed to raw material, wool dust and chemicals, as dyes. These exposures have been associated with respiratory tract infections, bronchoconstriction, cough, excessive mucus, nasal stuffiness and nocturnal asthma.
Cotton textile workers are at increased risk of developing a spectrum of respiratory disorders. Upper respiratory tract infections, breathlessness, chronic obstructive airway disease (COPD), byssinosis and occupational asthma.
This study was conducted on 120 textile workers at cotton and wool factories in El Mahalla El Kobra city in the period from November 2017 to September 2018.
These subjects were divided into 2 groups as follows and each group contained 60 workers:
group 1: Cotton Workers: It included 60 workers in cotton factories, they were divided into 4 subgroups based on the working section in the factory.
• group 1a: included 15 workers who worked at opening of cotton bales section.
• group 1b: included 15 workers who worked at carding section.
• group 1c: included 15 workers who worked at spinning section.
• group 1d: included 15 workers who worked at weaving section.
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group 2: wool workers: It included 60 workers in wool factories, they were divided into 6 subgroups based on the working section in the factory.
• group 2a: included 10 workers who worked at sorting and combing section.
• group 2b: included 10 workers who worked at cleaning section.
• group 2c: included 10 workers who worked at drying section.
• group 2d: included 10 workers who worked at dyeing section.
• group 2e: included 10 workers who worked at spinning section.
• group 2f: included 10 workers who worked at weaving section.
Workers were subjected to the following:
1- Full history taking with particular attention to:
Age, sex, the exposure period, the working section, the age of onset of the work, chest symptoms and their durations, drugs used and family history of chest diseases.
2- Clinical examination.
- General and local chest examination.
3- Radiological investigation in the form of plain chest x ray (P-A, lateral views) and CT if needed.
1- Spirometric Pulmonary function tests using “CHEST GRAPH H I – 105- JAPAN” apparatus which measure:
(FEV1%, FVC%, FEV1/FVC, PEFR, FEF 25-75%)
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5- Saint George’s Respiratory Questionnaire.
The present work revealed that:
There was a highly significant statistical difference between the 2 studied groups regarding exposure period.
There was a highly significant statistical difference between the 2 studied groups regarding chest wheeze while there was no significant statistical difference regarding other respiratory symptoms and signs but these respiratory symptoms were prevalent in cotton and wool exposed groups.
Cough, expectoration and chest tightness were the highest prevalent symptoms in cotton and wool exposed groups.
There was a significant statistical difference between the 2 studied groups regarding activity score of Saint George’s questionnaire.
There was a highly significant statistical negative correlation between exposure period to cotton dust and FEV1% and FVC%, also there was highly significant statistical negative correlation between exposure period to wool dust and FEV1% and significant statistical negative correlation withFEF50%.
There was a highly statistical positive correlation between exposure period to cotton and wool dust and scores of Saint George’s questionnaire.
The most common radiological findings in different sections of wool industry were hyperinflation and bilateral basal heterogenous opacities.
There was a highly significant statistical positive correlation between total score of Saint George’s questionnaire and age and
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duration of exposure in the two studied groups and a highly significant negative correlation between total score and FEV1%, FVC% in both groups and a significant negative correlation between total score and FEF50%.
Cotton workers suffer from byssinosis and occupational asthma. Wool workers suffer from both obstructive and restrictive lung diseases.