Table 1.
Number of CFU (Colony Forming Units) of E. coli and ctxR E. coli per 100 ml−1 water or per 100 mg−1 biofilm; when enrichments were done prior to detection, results were expressed as P (Presence) or A (absence) of ctxR E. coli.
| Site number# locationa | Water |
Biofilm |
||||
|---|---|---|---|---|---|---|
| Number of E. coli | Number of ctxR E. coli | Occurrence of ctxR E. colib | Number of E. coli | Number of ctxR E. coli | Occurrence of ctxR E. colib | |
| 1# Lusigny-sur-Ouche | 0 | 0 | A | 16.6 | 0 | A |
| 2# Bligny-sur-Ouche | 500 | 0 | A | 58.1 | 0 | A |
| 3# Bligny-sur-Ouche | >3640 | 946.4 | NT | >830 | 498 | NT |
| 4# Pont d’Ouche | 75 | 0 | P | 66.4 | 8.3 | NT |
| 5# Pont de Pany | 300 | 0 | P | 41.5 | 0 | P |
| 6# Mâlain | >2500 | 37.5 | NT | >2490 | 664 | NT |
| 7# Plombières | 12.5 | 0 | P | 24.9 | 0 | A |
| 8# Dijon | >1250 | 0 | P | >830 | 116.2 | NT |
| 9# Dijon | >1250 | 62.5 | NT | 415 | 91.3 | NT |
| 10# Varanges | 175 | 12.5 | NT | 149.4 | 24.9 | NT |
| 11# Tart l’Abbaye | 250 | 0 | P | 41.5 | 8.3 | NT |
| 12# Trouhans | 375 | 12.5 | NT | 249 | 8.3 | NT |
| 13# Saint-Jean-de-Losne (Saône river) | 25 | 0 | P | 0 | 0 | A |
| 14# Saint-Jean-de-Losne (harbor) | 412.5 | 0 | P | >830 | 0 | A |
aSites are identified by a number and the name of the nearest city (location), benrichment cultures for ctxR E. coli were analyzed only in case no or very few colonies were observed after direct plating of samples, NT not tested because colonies were obtained without enrichment.