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Plasmid profiles of 82 human and animal and 364 environmental B. anthracis isolates collected from 1955 to 1979
| Years | % of isolates that are:
|
|||
|---|---|---|---|---|
| pXO1−, pXO2− | pXO1+, pXO2− | pXO1−, pXO2+ | pXO1+, pXO2+ | |
| Human and animal isolates | ||||
| 1955-1966 | 45 | 18 | 15 | 22 |
| 1974-1979 | 29 | 12 | 7 | 52 |
| Environmental isolates | ||||
| 1955-1966 | 47 | 23 | 16 | 14 |
| 1974-1979 | 27 | 19 | 13 | 41 |
