160 seamen, including 73 deckmen, 62 engineers and 25 others were investigated clinically.
Advanced chronic inflammation of pharyngeal mucous membrane was visualized in 88.8% of all engineers, 67.2% of all deckmen and 72.0% of other members.
Laryngeal mucosa was found to be rather pathological, erythematous, edematous and polypoid in 63% of engineers, 40% of deckmen and 32% of other crews.
More or less same data were obtained concerning the tracheal mucous membrane.
On the other hand, there was no distinct difference among thee groups, concerning the nasal mucous membrane.
There seem to be short acting reversible irritation to the upper respiratory mucous membrane of deckmen and rather long acting irreversible irritation to that of engineers.
The ventilation of the engine room should be mostly improved to get rid of the engineers' complains.
Another interesting thing was found, that the deckmen are apt to catch cold during their vacation and off the ship, and engineers are so during their on duty in engine room.
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