الفهرس 
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Abstract
Pulmonary Tuberculosis is an infectious disease. The source of
infection is man via sputum and other excreta or animal via milk.,
respiratory and other excreta. The size or infecting dose, the virulence of
tubercle bacilli and the defense of the host are factors that influence the
infectiousness of tubercle baei11i. Mycobacteri un toberculosi s virulence is
due to its ability to survive and proliferate in mononuclear phagocytes, WJd
there must be frequent and prolonged contact with tuberculous patient for
transmission of infection that occur via droplet nuclei or ingestion of
infected milk .
. Tuberculosis morbidity and mortality is nigher in communities with
low socioeocnomic states as over crowding facilitates transmission of the
infection and the deficient diet Impaired host resistarce and makes person
more liable to get infection. Also some occupations such as shoe industry
printing and silica worker have high morbidity and mortality, in addition,
alchol dependence and goza and cigarete smoking especially in, Egypt
give rise to high riske of’pulmouery tuberculosis .
This study was conducted on 50 patients of them, 29 were males
and 2l were females and their ages ranged from 20 to 50 years.
There was an intimate relationship between the incidence of
pulmonary tuberculosis and lhe occupations of patients There was also,
positive family history in 30% of’patienrs.