E. coli has been considered as naturally non-transformable microorganism.
However, recently (Applied and Environ. Microbiol. 1996 vol. 62 page
3673-78) the transformation of E. coli in freshwahter has been reported.
Does anybody know for some other studies concerning natural
transformability of E. coli or S. typhimurium. I am particulary interested
of the reports on transformation in vivo. Thank you in advance!!!