FIG. 3.

Phylogeny of PFGE patterns of 20 Salmonella serovar Derby isolates from humans with infections during the period 2006 to 2007 in Henan Province, China. N2, panel used for susceptibility testing; AMP, ampicillin; APR, apramycin; XNL, ceftiofur; CHL, chloramphenicol; CIP, ciprofloxacin; COL, colistin, FFN, florfenicol; GEN, gentamicin; NAL, nalidixic acid; NEO, neomycin; SPE, spectinomycin; STR, streptomycin; SMX, sulfamethoxazole; TET, tetracycline; TMP, trimethoprim; AUG2, amoxicillin plus clavulanic acid; CEP, cephalosporin; POD, cefpodoxime.