title: [Avian Escherichia coli virulence factors associated with coli septicemia in broiler chickens].
abstract: In order to detect phenotypic characteristics associated with pathogenicity, 25 strains of Escherichia coli, isolated from clinical cases of colisepticemia in broiler chickens, were examined to determine the following properties: colicinogenicity, colicin V production, type 1 fimbriae, hemolysin expression and motility. Colicinogenicity occurred in 72% of the strains, 56% of all strains produced colicin V, 84% were positive for type 1 fimbriae and 80% were positive for motility. None of the strains had hemolytic activity; however, all of them, expressed at least one of the other characteristics studied. These results suggest that the diversity of phenotypes detected partially explain the multifactorial nature of avian colisepticemia.
authors.affiliation: Departamento de Enfermedades Infecciosas, Centro de Biología Experimental, Universidad Autónoma de Zacatecas, Calzada de la Revolución Mexicana s/n Colonia Tierra y Libertad, C.P. 98600 A.P 12 Guadalupe, Zac, México.
authors.forename: R M
authors.initials: RM
authors.lastname: Ramirez Santoyo
authors.forename: A
authors.initials: A
authors.lastname: Moreno Sala
authors.forename: Y
authors.initials: Y
authors.lastname: Almanza Marquez
mesh_terms: D015373:Bacterial Typing Techniques; D003086:Bacteriocin Plasmids; D001431:Bacteriological Techniques; D003087:Colicins / Q000032:analysis; D004926:Escherichia coli / Q000302:isolation & purification / Q000472:pathogenicity*; D004927:Escherichia coli Infections / Q000382:microbiology / Q000662:veterinary*; D010861:Fimbriae, Bacterial / Q000648:ultrastructure; D006462:Hemolytic Plaque Technique; D008800:Mexico; D010641:Phenotype; D011201:Poultry Diseases / Q000382:microbiology*; D018805:Sepsis / Q000382:microbiology / Q000662:veterinary*; D014774:Virulence
chemical_list: D003087:Colicins