Table 2: Mutation rates and products for 9 E. coli O157:H7 strains.

Strains and lociRU (bp) aTotal no. of mutationsMutation rateNo. of insertionsNo. of deletions
SbMcSbMc

HT2-15
 TR469914.3 × 10−050100
 O157-1069652.2 × 10−044100
 Total62.6 ×  60

EDL933
 Vhec779928.6 × 10−052000
 TR369714.4 × 10−051000
 TR469714.4 × 10−051000
 TR769714.4 × 10−051000
 O157-3610028.5 × 10−051010
 O157-10610031.3 × 10−040201
 Total104.3 ×  82

FB3
 O157-1069083.8 × 10−041232
 Total83.8 ×  35

Mat167/6
 TR4610014.3 × 10−050010
 O157-10610062.5 × 10−04051d0
 O157-37610014.3 × 10−051000
 Total83.4 ×  62

Gal 26
 O157-37610014.3 × 10−050001
 Total14.3 ×  01

FC O157
 Vhec461001e4.3 × 10−050000
 TR7610028.5 × 10−050020
 O157-10689104.8 × 10−041306
 Total137.1 ×  48

FB22
 O157-1069252.3 × 10−041130
 Total52.3 ×  23

FB81
 Vhec469214.6 × 10−051000
 Total14.6 ×  10

665p
 Vhec4610014.3 × 10−051000
 O157-10610041.7 × 10−042002
 Total52.1 ×  32

Combined data for the nine PSPEsInsertionsDeletions
SbMcSbMc

Vhec497.331.3 × 10−042000
Vhec79928.6 × 10−052000
TR39714.4 × 10−051000
TR498.7 31.3 × 10−041110
TR798.531.3 × 10−041020
O157-310028.5 × 10−051010
O157-1095.3411.8 × 10−03914711
O157-3710028.5 × 10−051001
18151112

Total572.5 × 3323

Number of lineages with usable data.
bSingle repeat mutation.
cMultiple repeat mutation.
dDeletion of one TR and insertion of 36 pb aleatory sequence.
ePoint mutation.