Volume 16, Number 11—November 2010
Research
Salmonella enterica Pulsed-Field Gel Electrophoresis Clusters, Minnesota, USA, 2001–2007
Table 1
Salmonella enterica serovar diversity identified by pulsed-field gel electrophoresis among case isolates submitted to the Minnesota Department of Health, 2001–2007*
Serovar | No. isolates | No. PFGE subtypes observed | Serovar isolates represented by most common subtype, % | Serovar isolates represented by 2 most common subtypes, % | Serovar isolates represented by 3 most common subtypes, % | Simpson index† |
---|---|---|---|---|---|---|
Heidelberg | 223 | 46 | 57 | 62 | 66 | 0.67 |
Hadar | 48 | 20 | 48 | 54 | 58 | 0.77 |
Enteritidis | 822 | 80 | 38 | 60 | 73 | 0.79 |
Thompson | 57 | 23 | 42 | 53 | 58 | 0.81 |
I 4,5,12:I:– | 78 | 25 | 31 | 50 | 60 | 0.86 |
Braenderup | 53 | 30 | 26 | 36 | 43 | 0.92 |
Oranienburg | 63 | 26 | 21 | 32 | 41 | 0.93 |
Anatum | 46 | 22 | 17 | 33 | 46 | 0.93 |
Paratyphi B var. L | 60 | 35 | 22 | 37 | 43 | 0.93 |
Montevideo | 121 | 59 | 22 | 30 | 36 | 0.94 |
Muenchen | 73 | 50 | 21 | 25 | 27 | 0.96 |
Saintpaul | 81 | 44 | 17 | 26 | 32 | 0.96 |
Typhimurium | 1,004 | 285 | 11 | 20 | 28 | 0.96 |
Infantis | 75 | 43 | 9 | 17 | 24 | 0.97 |
Agona | 74 | 48 | 10 | 16 | 22 | 0.98 |
Newport | 314 | 143 | 10 | 15 | 19 | 0.98 |
Javiana | 48 | 41 | 6 | 11 | 15 | 0.99 |
*PFGE, pulsed-field gel electrophoresis.
†Calculated as 1 – D = (Σn(n – 1))/(N(N – 1)), where n is number of isolates of each subtype and N is total number of isolates of a serovar. A value of 1 indicates infinite diversity, and a value of 0 indicates no diversity.
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