Table 3.

Phage susceptibility of E. coli O157:H7 strains and their O antigen-negative mutants.

E. coli strain	Description	Plaque formationa	Source or reference
ATCC 43895	Wild-type E. coli O157:H7, clinical isolate, stx1+/stx2+	+	ATCCb
43895Δper	O antigen-negative mutant of ATCC 43895 with perosamine synthetase deleted	–	Sheng et al. (2008)
43895ΔperComp	43895Δper transformed with pCRII::per	+	Sheng et al. (2008)
8624	Wild-type E. coli O157:H7, clinical isolate, stx1/stx2+	+	Bilge et al. (1996)
F12	O antigen-negative mutant of strain 8624	–	Bilge et al. (1996)

^a+, susceptible to Φ241; –, not susceptible to Φ241.

^bATCC, American Type Culture Collection.