Table 2. Pennsylvania’s Most Common Human Salmonella PFGE Patterns Also Found in Salmonella Recovered from Food Animals Processed in the Northeastern U.S.
| Serotype | PulseNet XbaI Pattern1 | No. (% of All Human Salmonella)2 | No.Linked toOutbreaks | No. from Blood | % from Blood within Pattern3 | Association ofPFGE Pattern withBlood3 Odds Ratio(95% CI); p | CorrespondingVetNet Pattern4 | No. (%)5of FoodAnimalSalmonella | No.fromCattle | No.fromChicken | No.fromSwine | No.fromTurkey | |
| Berta | JAXX01.0001 | 49 (0.41) | 0 | 5 | 10.20 | 2.00 (0.70-4.75); 0.17 | JAXX01.0003 ARS | 3 (0.14) | 0 | 0 | 0 | 3 | |
| Enteritidis | JEGX01.0002 | 235 (1.96) | 3 | 14 | 5.96 | 1.11 (0.62-1.87); 0.68 | JEGX01.0017 ARS | 0 | 0 | 0 | 0 | 0 | |
| Enteritidis | JEGX01.0004 | 1,968 (16.45) | 79 | 130 | 6.61 | 1.30 (1.06-1.58); 0.01 | JEGX01.0003 ARS | 106 (5.09) | 1 | 105 | 0 | 0 | |
| Enteritidis | JEGX01.0005 | 426 (3.56) | 12 | 35 | 8.22 | 1.60 (1.11-2.26); 0.01 | JEGX01.0002 ARS | 65 (3.12) | 1 | 64 | 0 | 0 | |
| Enteritidis | JEGX01.0009 | 144 (1.20) | 1 | 15 | 10.42 | 2.06 (1.16-3.46); 0.02 | JEGX01.0022 ARS | 0 | 0 | 0 | 0 | 0 | |
| Enteritidis | JEGX01.0021 | 331 (2.77) | 24 | 21 | 6.34 | 1.19 (0.74-1.84); 0.43 | JEGX01.0010 ARS; JEGX01.0052 ARS6 | 1 (0.05) | 0 | 1 | 0 | 0 | |
| Enteritidis | JEGX01.0034 | 176 (1.47) | 11 | 1 | 0.57 | 0.10 (0.00-0.49); 0.00 | JEGX01.0005 ARS | 14 (0.67) | 0 | 14 | 0 | 0 | |
| Heidelberg | JF6X01.0022 | 151 (1.26) | 18 | 16 | 10.60 | 2.10 (1.21-3.48); 0.01 | JF6X01.0015 ARS | 30 (1.44) | 3 | 25 | 0 | 2 | |
| Newport | JJPX01.0011 | 54 (0.45) | 0 | 0 | 0 | 0.00 (0.00-1.00); 0.05 | JJPX01.0204 ARS | 1 (0.05) | 0 | 1 | 0 | 0 | |
| Newport | JJPX01.0061 | 72 (0.60) | 28 | 0 | 0 | 0.00 (0.00-0.74); 0.02 | JJPX01.0069 ARS | 1 (0.05) | 0 | 0 | 1 | 0 | |
| Thompson | JP6X01.0001 | 54 (0.45) | 0 | 3 | 5.56 | 1.03 (0.25-2.95); 0.90 | JP6X01.0024 ARS | 1 (0.05) | 0 | 1 | 0 | 0 | |
| Typhimurium | JPXX01.0001 | 53 (0.44) | 2 | 3 | 5.66 | 1.05 (0.26-3.02); 0.87 | JPXX01.0021 ARS | 1 (0.05) | 0 | 1 | 0 | 0 | |
| Typhimurium | JPXX01.0003 | 113 (0.94) | 2 | 9 | 7.96 | 1.52 (0.72-2.91); 0.24 | JPXX01.0003 ARS | 18 (0.86) | 6 | 5 | 3 | 4 | |
| Typhimurium | JPXX01.0018 | 81 (0.68) | 0 | 2 | 2.47 | 0.44 (0.07-1.51); 0.24 | JPXX01.0002 ARS | 2 (0.10) | 1 | 0 | 1 | 0 | |
| Typhimurium | JPXX01.0146 | 278 (2.32) | 16 | 1 | 0.36 | 0.06 (0.00-0.31); 0.00 | JPXX01.0081 ARS | 5 (0.24) | 0 | 1 | 4 | 0 | |
| Typhimurium | JPXX01.0302 | 149 (1.25) | 46 | 3 | 2.01 | 0.36 (0.09-0.99); 0.05 | JPXX01.0106 ARS | 2 (0.10) | 1 | 1 | 0 | 0 | |
| Typhimurium | JPXX01.0604 | 61 (0.51) | 3 | 1 | 1.64 | 0.29 (0.01-1.49); 0.18 | JPXX01.0079 ARS | 10 (0.48) | 1 | 7 | 0 | 2 | |
| Typhimurium;I 4,[5],12:i:- | JPXX01.0026 | 61 (0.51) | 4 | 1 | 1.64 | 0.29 (0.01-1.49); 0.18 | JPXX01.0308 ARS; TERX01.0010 ARS | 0 | 0 | 0 | 0 | 0 | |
| I 4,[5],12:i:- | JPXX01.0621 | 219 (1.83) | 2 | 8 | 3.65 | 0.66 (0.30-1.28); 0.25 | TERX01.0001 ARS | 15 (0.72) | 2 | 12 | 1 | 0 | |
| Typhimurium;I 4,[5],12:i:- | JPXX01.1212 | 47 (0.39) | 0 | 3 | 6.38 | 1.20 (0.29-3.45); 0.72 | JPXX01.0304 ARS; TERX01.0008 ARS | 0 | 0 | 0 | 0 | 0 | |
| TOTAL | 4,722 (39.46) | 251 | 271 | NA | TOTAL | 275 (13.20) | 16 | 238 | 10 | 11 | |||
Pattern names include a three-letter code that indicates serotype (e.g., JEG for serotype Enteritidis in the pattern names JEGX01.0004 and JEGA26.0002), followed by a three-character code for.
restriction enzyme (e.g., X01 for XbaI in JEGX01.0004; A26 for BlnI in JEGA26.0002), and a four-digit number for the unique strain designation (e.g., 0004 in JEGX01.0004) (Gerner-Smidt et al., 2006).
Percentage of total number of human Salmonella isolates (11,967).
Number of human Salmonella isolates recovered from blood for a particular pattern expressed as a percentage of the total number from all sources for that PFGE pattern; e.g., for Berta XbaI.
pattern JAXX01.0001, (5/49)×100 = 10.20%. Statistical method for determining Odds Ratio is described in Materials and Methods.
VetNet’s pattern nomenclature conforms to PulseNet’s nomenclature, with three exceptions: (1) PulseNet uses a single three-letter code (JPX) to designate both serotype Typhimurium and antigenic formula I 4,[5],12:i:- whereas VetNet uses two different codes, JPX for Typhimurium and TER for I 4,[5],12:i:-; (2) the four-digit strain designation codes are different in the two systems; and (3) “ARS” (for Agricultural Research Service of the USDA) is appended to VetNet pattern names.
Percentage of the total number of animal Salmonella isolates (2,083).
VetNet identified two different patterns within PulseNet pattern JEGX01.0021.