Respuesta humoral de IgM e IgG en cerdos Criollos Mexicanos y Comercial, predestete sin reto inmunológico inducido

in the present study the igm and igg humoral response was analyzed and compared between mexican creole pigs (cuino pig and mexican hairless pig) and commercial pigs (cp) f1 yorkshire-landrace, to establish differences that allowed to use them like indicator of resistance to disease. seventy six weanling pigs to the 45 days of age without vaccination were included. a blood sample was obtained at weaning to evaluate the igm and igg antibody level to the bovine pig mixed bacterin, contains stocks of salmonella, escherichia coli and pasteurella, by elisa. the sonicated bacterin was used to sensitize plates. the igm anti-bacterin levels were higher in mexican haerless pig (mhp) that in the other breeds (p<0,0001). no differences in the igg anti bacterin levels between cuino pigs (cc) and mhp were found, nevertheless both creole breeds were different that the cp (p<0,0001), who showed a lower antibody response. our results show that mhp and cc have both a better humoral response to salmonella, escherichia coli and pasteurella than cp.