Correlation of the characters fermentation of trehalose, non-transmissible resistance to tetracycline, and relatively long flagellar wavelength in Proteus morganii.

An investigation of strains of Proteus morganii isolated from patients in Odense, Denmark, and of 21 serotype strains revealed a close correlation between the fermentation of trehalose and a non-transmissible resistance to tetracycline. The trehalose fermenting, tetracycline resistant strains had a longer flagellar wavelength than the non-fermenting, sensitive strains. Resistance to chloramphenicol occurred only in strains of the former group.