TABLE 3.
Relationship between APEC pathotype (high, intermediate, or low pathogenicity) and gene prevalence
| Genea | No. of isolates carrying (+) or lacking (−) the gene according to APEC pathotype
|
Probabilityb | |||||
|---|---|---|---|---|---|---|---|
| High + (n = 73) | High − (n = 73) | Intermediate + (n = 26) | Intermediate − (n = 26) | Low + (n = 25) | Low − (n = 25) | ||
| etsA | 69 | 4 | 22 | 4 | 17 | 8 | 0.0027 |
| etsB | 69 | 4 | 22 | 4 | 17 | 8 | 0.0027 |
| hlyF | 71 | 2 | 23 | 3 | 20 | 5 | 0.0133 |
| iutA | 71 | 2 | 23 | 3 | 20 | 5 | 0.0133 |
| papC | 30 | 43 | 10 | 16 | 3 | 22 | 0.0223 |
| ireA | 33 | 40 | 12 | 14 | 4 | 21 | 0.0232 |
| kpsMT2 | 15 | 58 | 0 | 26 | 4 | 21 | 0.0232 |
| Episomal ompT | 69 | 4 | 23 | 3 | 19 | 6 | 0.031 |
| papGII | 27 | 46 | 10 | 16 | 3 | 22 | 0.0482 |
| papEF | 27 | 46 | 9 | 17 | 3 | 22 | 0.0549 |
| cvaA | 61 | 12 | 18 | 8 | 16 | 9 | 0.0716 |
| cvaB5 | 61 | 12 | 18 | 8 | 16 | 9 | 0.0716 |
| malPAI | 10 | 63 | 1 | 25 | 0 | 25 | 0.0726 |
| papG23 | 23 | 50 | 10 | 16 | 3 | 22 | 0.0841 |
| Episomal iss | 65 | 8 | 21 | 5 | 18 | 7 | 0.1077 |
| kpsMT1 | 14 | 59 | 1 | 25 | 3 | 22 | 0.1722 |
| fyuA | 28 | 45 | 11 | 15 | 5 | 20 | 0.1913 |
| iha | 0 | 73 | 0 | 26 | 1 | 24 | 0.2016 |
| papA | 13 | 60 | 3 | 23 | 1 | 24 | 0.2297 |
| vat | 32 | 41 | 10 | 16 | 6 | 19 | 0.2405 |
| ibeA | 2 | 71 | 0 | 26 | 2 | 23 | 0.2727 |
| cvaB3 | 49 | 24 | 14 | 12 | 14 | 11 | 0.3723 |
| gimB | 6 | 67 | 0 | 26 | 1 | 24 | 0.376 |
| cvaC | 41 | 32 | 12 | 14 | 11 | 14 | 0.4935 |
| eitA | 42 | 31 | 14 | 12 | 11 | 14 | 0.508 |
| eitB | 42 | 31 | 14 | 12 | 11 | 14 | 0.508 |
| fliCH7 | 3 | 70 | 0 | 26 | 0 | 25 | 0.5678 |
| cbi | 27 | 46 | 10 | 16 | 12 | 13 | 0.6474 |
| Chromosomal ompT | 33 | 40 | 12 | 14 | 9 | 16 | 0.6996 |
| cma | 18 | 55 | 7 | 19 | 7 | 18 | 0.8833 |
| bmaE | 1 | 72 | 0 | 26 | 0 | 25 | 1 |
| iroN | 63 | 10 | 23 | 3 | 22 | 3 | 1 |
a
Note that only 32 genes are listed, since kpsMT3, cnf1, sfafoc, papGIII, hlyD, rfc, papG1, papGI, gafD, cdtB, focG, papGI′, afa, and sfaS occurred in none of these isolates.
b
The probability column shows the P values for Fisher's exact test of the homogeneity of prevalence rates across the pathogenicity groups for each gene.