title: Adherence, invasion, toxigenic, and chemotactic properties of Mexican campylobacter strains.
abstract: To determine the virulence factors of Mexican wild-type strains of Campylobacter jejuni and Campylobacter coli, 31 wild-type strains were isolated from food and from humans. The production of cytolethal distending toxin and the adherence and invasion capabilities of these strains were assayed in Vero cells. Hard agar plugs with repellents and attractants were used to examine chemotaxis. Mueller-Hinton agar with supplements was used for motility analysis and to measure hemolytic activity. Nine strains of C. jejuni and eight strains of C. coli exhibited motility, most within a diameter of 2 to 13 mm. Most of the strains reacted to the repellent compounds analyzed, and α- and β-like hemolysis and cytotoxicity in Vero cells were observed for all strains. Isolates adhered to and invaded Vero cells to various degrees. Although strains of C. jejuni exhibited stronger adherence but less invasion compared with strains of C. coli, the difference was not significant (P > 0.05). The strains of C. jejuni and C. coli isolated from food and from patients in Mexico could have major impacts on public health.
authors.affiliation: Departamento de Microbiología e Inmunología, Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León, Ciudad Universitaria, San Nicolás de los Garza, N.L. 66451, México.
authors.forename: Ismael
authors.initials: I
authors.lastname: Malagón
authors.forename: Santos
authors.initials: S
authors.lastname: García
authors.forename: Norma
authors.initials: N
authors.lastname: Heredia
mesh_terms: D000818:Animals; D001422:Bacterial Adhesion / Q000502:physiology*; D002167:Campylobacter / Q000472:pathogenicity* / Q000502:physiology*; D017000:Campylobacter coli / Q000472:pathogenicity / Q000502:physiology; D016123:Campylobacter jejuni / Q000472:pathogenicity / Q000502:physiology; D002522:Chlorocebus aethiops; D003257:Consumer Product Safety; D005506:Food Contamination / Q000517:prevention & control; D005516:Food Microbiology; D006801:Humans; D008800:Mexico; D014709:Vero Cells; D014774:Virulence