L. innocua
Three L. innocua strains (51742, 33090, 33091) were obtained
from the American Type Culture Collection (Manassas, Va., U.S.A.).
The strains were propagated on Tryptic Soy Agar (BD−Difco Laboratories,
Sparks, Md., U.S.A.) at 37 ◦C and maintained at 0 to
2 ◦C until ready for use