Duguid, J. P.

2019-02-15T14:20:51Z

2019-02-15T14:20:51Z

1949

Pulmonary tuberculosis is contracted mainly by inhalation into the lungs of small airborne infected dust -particles liberated from handkerchiefs, clothes, bedding and carpets which have been soiled by the sputum or by the large projectile cough- droplets of ' patients. A much less important, but possibly not rare, mode of infection is by inhalation of small infected droplet- nuclei introduced into the air by the coughing of patients. A third, and probably rare, mode of infection is by ingestion into the mouth, on fingers or eating utensils, of tubercle bacilli acquired from patients by contact, with subsequent aspiration of the bacilli, probably in small droplets of saliva, from mouth to lungs via the trachea. Tubercle bacilli acquired by ingestion, and invading the body through the tonsils or intestines, do not give rise to pulmonary tuberculosis apart from military lung infection due to haematogenous spread from a primary alimentary-tract lesion.

http://hdl.handle.net/1842/33862

The University of Edinburgh

Annexe Thesis Digitisation Project 2019 Block 22

A study of the mechanisms of transmission of respiratory-tract pathogenic bacteria

Thesis or Dissertation

Doctoral

MD Doctor of Medicine