Differentiation of Pasteurella multocida subspecies multocida isolates from the respiratory system of pigs by using polymerase chain reaction fingerprinting technique.

PCR fingerprinting technique was applied to subtype 44 Pasteurella multocida subspecies multocida (P.m.sp.m.) isolates from the respiratory system of pigs. Two single primers were tested for their abilities to generate individual fingerprints by using PCR. Primer 1 (core sequence of the M13 phage) grouped the 44 P.m.sp.m. strains into five distinct fingerprinting profiles, while primer 2 ((GACA)4) grouped them into seven profiles. The results suggest that PCR fingerprinting is an efficient technique to detect DNA polymorphism in the species P.m.sp.m. This technique could be used to differentiate P.m.sp.m. strains of the same capsular serotype.