Experimental infection of the bovine udder with the induced L phase of Streptococcus agalactiae.
Two out of 30 strains of Streptococcus agalactiae produced stable L phase variants when passaged on hypertonic agar containing penicillin. Streptococcal L phase variants were inoculated into six quarters of cows. The cows were observed for three months but the L phase was not reisolated and no reversion took place, the cows remaining free from streptococcal infection.
D000818:Animals; D002417:Cattle; D005260:Female; D007740:L Forms / Q000254:growth & development; D008414:Mastitis, Bovine / Q000209:etiology*; D013290:Streptococcal Infections / Q000209:etiology / Q000662:veterinary*; D013292:Streptococcus agalactiae / Q000254:growth & development