Abstract
L forms induced from two strains of group A Streptococcus were inoculated intraperitoneally and intravenously into conventional and germ-free mice. After intravenous injection, streptococcal L forms disappeared very quickly from the blood, whereas, after intraperitoneal injection, it was possible to isolate them as long as 25 days after inoculation. Observations suggest that a certain degree of reversion to a bacterial form may occur spontaneously in animals.
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