FIG 4 .

PFGE analysis of representative RE-cmeABC-positive Campylobacter isolates. SmaI was used for digestion. The regions of isolation (provinces and cities) include Guangdong (GD), Shandong (SD), Ningxia (NX), Henan (HN), and Shanghai (SH). The host species include chickens (C), swine (S), and ducks (D). (I) Representative RE-cmeABC-positive C. jejuni (CJ) isolates (n = 36). With 80% genetic similarity as a cutoff, the C. jejuni isolates were grouped into 17 clusters (PFGE patterns represented by multiple strains) and 24 unique PFGE patterns. (II) Representative RE-cmeABC-positive C. coli (CC) isolates (n = 15). C. coli isolates were grouped into 11 clusters and 15 unique PFGE patterns. (III) Representative RE-cmeABC-positive C. jejuni isolates from Henan Province in 2014 (n = 25). The isolates were grouped into two clusters and three unique PFGE patterns.