Table 6.

Antimicrobial resistance genes and plasmid sequence analyses of Salmonella serovars from broilers

Serovar	Phenotype	Resistance genes on plasmids	No. of plasmids	Plasmid replicons	Plasmid size(bp)
S. Schwarzengrund	SSuT	ant(3”)-Ia, sul1, tet(A), dfrA14	1	IncFIB	284,635
S. Schwarzengrund	SSuTKm	ant(3”)-Ia, sul1, tet(A), dfrA14, aph(3”)-Ia	1	IncFIB	284,630
S. Manhattan	SSuT	ant(3”)-Ia, sul1, tet(A) none	2	IncFIB IncX4	278,655 29,617
S. Manhattan	SSuTKm	ant(3”)-Ia, sul1, tet(A)	1	IncFIB	276,478
S. Infantis	SSuT	ant(3”)-Ia, sul1, tet(A)	1	IncFIB	270,117
S. Infantis	SSuTKm	ant(3”)-Ia, sul1, tet(A), dfrA14, aph(3”)-Ia none	2	IncFIB IncP1	291,123 41,696

S- Streptomycin, Su- sulfamethoxazole, T-tetracycline and Km- kanamycin resistant; ant (3”)-Ia (aadA1), sul1, tet (A), aph(3’’)-Ia (aphA1) and dfrA14 are genes involved in resistance to streptomycin, sulfamethoxazole, tetracycline, kanamycin and trimethoprim, respectively

“None” - no resistance gene detected on the plasmid.