TABLE 2.
Association of L. monocytogenes ribotypes with origin (food or human)
| Ribotype | No. (%) of isolates
|
P valuea | |
|---|---|---|---|
| Food | Human | ||
| DUP-1030A | 8 (1.6) | 8 (1.6) | NS |
| DUP-1030B | 0 | 10 (2.0) | <0.01 |
| DUP-1038B | 15 (3.0) | 63 (12.8) | <0.0001 |
| DUP-1039A | 12 (2.4) | 31 (6.3) | <0.01 |
| DUP-1039B | 18 (3.6) | 43 (8.7) | <0.001 |
| DUP-1039C | 35 (7.0) | 25 (5.1) | NS |
| DUP-1042A | 11 (2.2) | 15 (3.0) | NS |
| DUP-1042B | 18 (3.6) | 71 (14.4) | <0.0001 |
| DUP-1042C | 14 (2.8) | 0 | <0.001 |
| DUP-1043A | 30 (6.0) | 15 (3.0) | <0.05 |
| DUP-1044A | 11 (2.2) | 28 (5.7) | <0.01 |
| DUP-1044B | 1 (0.2) | 19 (3.9) | <0.0001 |
| DUP-1044E | 10 (2.0) | 0 | <0.01 |
| DUP-1045B | 14 (2.8) | 11 (2.2) | NS |
| DUP-1052A | 58 (11.6) | 34 (6.9) | <0.05 |
| DUP-1053A | 24 (4.8) | 40 (8.1) | <0.05 |
| DUP-1062A | 151 (30.1) | 9 (1.8) | <0.0001 |
| DUP-1062D | 28 (5.6) | 1 (0.2) | <0.0001 |
| Rare (found in 1-4 isolates) | 23 (4.6) | 43 (8.7) | <0.01 |
| Uncommon (found in 5-8 isolates) | 21 (4.2) | 28 (5.7) | NS |
| Total | 502 (100.0) | 492 (100.0) | <0.0001b |
a
P values refer to comparison of the frequency of the ribotype specified in a particular row (versus all other ribotypes) among food isolates and human isolates. NS = not significant.
b
P value for total refers to the overall analysis of ribotype versus origin.