Alpha Hemolytic Streptococci of Air: Their Variant Forms, Origin and Numbers per Cubic Foot of Air in Several Types of Locations

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Abstract
Streptococci of the a hemolytic types were found widely distributed in the air both of enclosed places of congregation and of the open spaces of a large city. A large majority of these organisms seemed to be of nasopharyngeal origin. Many of the strains, of presumed nasopharyngeal origin, differed in morphology and certain biochem. properties from typical a streptococci of the throat. These differences may be due to the effects of aerial environment. The possibility of similar alterations in respiratory pathogens is discused. a hemolytic streptococci were present most frequently and in greatest numbers in the air of school buildings, and an apparent relationship was noted between the type of room and degree of occupancy and the numbers found, the largest numbers being found in occupied assembly and classrooms.

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