TABLE 3.
Simpson's index of diversity scores among the three Salmonella serotypes by different Salmonella subtyping methods
| Isolate (n)a | Simpson's index of diversityb for the following subtyping method(s): |
|||
|---|---|---|---|---|
| PFGEc | MLVAd | MLVA and PFGE (combined) | PFGE and antimicrobial resistance (combined)e | |
| Serotype 4,5,12:i:− (n = 28) | 0.833 (0.711-0.955) | 0.910 (0.843-0.977) | 0.971 (0.940-1.00) | 0.844 (0.717-0.971) |
| Serotype Typhimurium (n = 182) | 0.967 (0.953-0.981) | 0.993 (0.989-0.996) | 0.997 (0.996-0.999) | 0.988 (0.980-0.994) |
| Serotype Newport (n = 156) | 0.930 (0.911-0.948) | 0.913 (0.886-0.941) | 0.980 (0.970-0.990) | 0.972 (0.961-0.982) |
| Bovine isolates (n = 163) | 0.947 (0.933-0.960) | 0.950 (0.932-0.968) | 0.984 (0.976-0.992) | 0.979 (0.971-0.987) |
| Human isolates (n = 203) | 0.986 (0.980-0.992) | 0.994 (0.991-0.997) | 0.999 (0.997-0.999) | 0.992 (0.987-0.997) |
| Bovine serotype Typhimurium (n = 62) | 0.938 (0.910-0.966) | 0.976 (0.959-0.993) | 0.992 (0.984-0.999) | 0.980 (0.967-0.994) |
| Human serotype Typhimurium (n = 120) | 0.975 (0.960-0.990) | 0.994 (0.990-0.999) | 0.997 (0.994-1.00) | 0.990 (0.979-0.997) |
| Bovine serotype Newport (n = 91) | 0.859 (0.830-0.889) | 0.856 (0.811-0.900) | 0.954 (0.931-0.977) | 0.943 (0.922-0.964) |
| Human serotype Newport (n = 65) | 0.976 (0.959-0.994) | 0.968 (0.947-0.988) | 0.995 (0.990-1.00) | 0.985 (0.971-0.999) |
a
The number of isolates included in the final data set (n) (i.e., reduced data set of 366 isolates) is shown.
b
The mean estimates are shown in boldface type, and the 95% confidence intervals are shown in parentheses.
c
Salmonella serotype 4,5,12:i:−, Typhimurium, and Newport isolates exhibited 13, 90, and 54 PFGE patterns, respectively.
d
Salmonella serotype 4,5,12:i:−, Typhimurium, and Newport isolates exhibited 15, 135, and 59 MLVA patterns, respectively.
e
Salmonella serotype 4,5,12:i:−, Typhimurium, and Newport isolates exhibited 7, 41, and 22 antimicrobial resistance patterns, respectively.