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ESCHERICHIA COLI O104:H4

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129

Table 6. STEC/VTEC serotypes most frequently detected among human strains isolated in Lugo (2003–2011)* Serotype

Phylogenetic group

ST

Seropathotype

Intimin type

O5:H–

A

ST342

C

β1

O26:H11

B1

ST21

B

β1

O103:H2

B1

ST17

B

ε1

O111:H8

B1

ST16

B

θ

O113:H21

B1

ST56

C

O118:H16

B1

ST21

C

β1

O145:H–

D

ST32

B

γ1

O146:H21

B1

ST442

D

O157:H7

D

ST11

A

γ1

*

Unpublished data.

among strains isolated from humans in Spain, together with the phylogenetic group, ST, seropathotype, and intimin-type ([9] and unpublished data). Figure 2 shows a dendrogram of the XbaI macrorestric-

Int. Microbiol.

None of the STEC strains isolated in Galicia from human patients between 1992 and 2011 belonged to serotype O104:H4, the serotype implicated in the German outbreak. Table 6 shows the most frequent STEC serotypes found

Fig. 2. Dendrogram of the XbaI macrorestriction profiles of 21 STEC strains of serotype O157:H7 isolated in Galicia, northwestern Spain. Strain code, stx1, stx2, year of isolation and origin, are shown on the right side of the dendrogram.*O157-809 strain isolated from a patient with HC, O157-816 strain isolated from a sample of frozen beef consumed by the patient, and O157-810 strain isolated from an asymptomatic relative . **O157-718, O157-720 and O157722 strains isolated from two patients and an asymptomatic carrier of the same family, respectively. Unpublished data.

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International Microbiology  

Vol 14, number 3 september 2011

International Microbiology  

Vol 14, number 3 september 2011