Table 2. General properties of HC20_373 and other HC20 clusters.
| Pairwise SNP Differences | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| HC20 cluster | Tree Number | No. genomes | Serovar | Geography | Predominant Host | Dates | Mean | Median | Max |
| Random large HC20 clusters | |||||||||
| 10 | 45443 | 315 | Adelaide | U.S.A. | Swine (83%) | 2009–2020 | 21.5 | 16.0 | 69.0 |
| 44 | 45449 | 970 | Newport | U.S.A. | Cows (61%); Humans (23%) | 2000–2020 | 19.9 | 20.0 | 54.0 |
| 122 | 45447 | 1156 | Newport | U.S.A. | Human (55%); Environment (41%) | 1998–2020 | 25.0 | 23.0 | 65.0 |
| 125 | 45450 | 576 | Bertha | U.S.A. | Chickens (51%); Humans (29%) | 1994–2020 | 27.9 | 27.0 | 73.0 |
| 557 | 45446 | 849 | Muenchen | U.S.A. | Chickens (79%); Swine (7%) | 1988–2020 | 19.4 | 13.0 | 71.0 |
| 710 | 45445 | 420 | Johannesburg | U.S.A. | Swine (82%) | 2003–2020 | 17.3 | 12.0 | 59.0 |
| 1348 | 45423 | 844 | Enteritidis PT8 | UK | Human (95%); Feeder Mice1 | 1972–2020 | 9.5 | 7.0 | 59.0 |
| 1487 | 45424 | 359 | Typhimurium | England | Human (97%) | 2006–2020 | 19.7 | 15.0 | 57.0 |
| Outbreaks | |||||||||
| 4179 | 60146 | 581 | Newport | North America | Human (97%) | 2010–2021 | 3.2 | 1.0 | 56.0 |
| 39803 | 45421 | 222 | Hadar | U.S.A. | Human (95%) | 2000–2018 | 3.0 | 3.0 | 17.0 |
| Lab strains | |||||||||
| 373 | 60131 | 496 | ATCC14028s | global | Laboratory and Nature | 2000–2020 | 1.9 | 1.0 | 15.0 |
| 5519 | 60183 | 46 | SL1344 | Europe | Laboratory (89%) | 2002–2018 | 4.6 | 5 | 32 |
| 20633 | 60214 | 50 | NCTC 7832 | UK, Ireland | Laboratory? | 2006–2021 | 2.6 | 2 | 11 |