TABLE 1.

Mean LRFs in DC experiments

Expt	Mean LRF	SD
DC alone	0.91	0.15
Gentamicin alone	2.11	0.05
Oxytetracycline alone	1.90	0.40
DC + gentamicin	4.27	0.30
DC + oxytetracycline	>5.15	0.30