| abstract |
Natural and] sinewy strains of bacterianEscherich coli are subject to long-term exposurenindustrial scale phageninfections.nThe steps of the procedure described have been obtainednphage-resistant strain of Escherichia colininfection that produces a large amountnpenicillin acylase. Stability requirednthe properties of the obtained strain was testednin two consecutive generationsnlyophilized cans |