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PFGE. Tree of PFGE fingerprints of various C. perfringens strains. Colours are as follows; white; negative, black; positive, for features including netB, VR-10A and isolation from chicken. Colours referring to clade designation are as follows; blue; Non-poultry, Green (dark and light); Non-pathogenic clade 3 and 4 respectively, Pink; pathogenic clade 1B, Red; pathogenic clade 1A, Orange; pathogenic clade 2
