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ERIC-PCR and REP-PCR fingerprints of 22 E. coli strains in swine house E. The dendrogram was constructed using UPGMA with a 1% band tolerance (feces-1 means the first E. coli strain isolated from feces; indoor-2 means the second E. coli strain isolated from indoor air; upwind50m-1 means the first E. coli strain isolated from upwind at 50 m; downwind100m-1 means the first E. coli strain isolated from downwind at 100 m).
