Introduction: Occupational exposure to wood dust may result in different toxic and al
or molds affecting respiratory system and skin. Aim of work: To study the respiratory
health disorders among workers in some joinery workshops and to assess their workplace
environment. Materials and Methods: A cross sectional study was conducted
during the period from the February 1st, 2019 to August 31th, 2020, on 100 woodworkers
chosen from 11 joinery (wood made furniture) workshops, Menouf city, Menoufia governorate.
Similar numbers of subjects were chosen randomly from workers' relatives
who were never exposed to similar hazards. All participants were interviewed using a
predesigned questionnaire. Physical examination and spirometric measurements were
performed for them. Environmental study of the workplace was done. Results: The
mean concentration of respirable wood dust was 3.61±2.00 mg/m3, which is higher
than the international permissible levels. Workers exposed to wood dust had significantly
higher prevalence of respiratory manifestations e.g. rhinitis, cough, expectoration,
wheezes, shortness of breathing, chest pain and asthma (59%, 64%, 51%, 34%,
70%, 4% and 24%; respectively) as well as decreased spirometric measurements compared
to the controls. The higher prevalence of respiratory manifestations as well as
decreased spirometric measurements were positively correlated with time intensity factor.
Conclusion and recommendations: Exposure to wood dust in a concentration
more than permissible level has been adversely affecting the respiratory system and
causing decrease in spirometric measurements. Regular use of good quality personal   protective equipment, proper ventilation and periodic medical examination are highly
recommended. Also, regular monitoring of the work environment and keeping dust
level below permissible levels are mandatory.