title: Comparative study of virulence and virulence factors of Aeromonas hydrophila strains isolated from water and sediments of a river.
abstract: Seventy-four strains of Aeromonas hydrophila isolated from water and sediments of the River Porma (León, N.W. Spain) were characterized biochemically and biologically. Fifty-seven strains (77.02%) were virulent for rainbow trout (Salmo gairdneri) by intramuscular challenge but showed differing degree of pathogenicity which could not be associated with the source. A lack of correlation between caseinase, haemolytic and cytotoxic activities of the strains and their isolation source was also observed. Only two surface characters, acriflavine 0.2% agglutination and non-agglutinating SP-/PAB-phenotypes, were significantly associated with water and sediment strains, respectively.
authors.affiliation: Departamento de Patología Animal (Sanidad Animal), Microbiología e Inmunología, Facultad de Veterinaria, Universidad de León, Spain.
authors.forename: D
authors.initials: D
authors.lastname: Mateos
authors.forename: J
authors.initials: J
authors.lastname: Anguita
authors.forename: O
authors.initials: O
authors.lastname: Rivero
authors.forename: G
authors.initials: G
authors.lastname: Naharro
authors.forename: C
authors.initials: C
authors.lastname: Paniagua
mesh_terms: D016980:Aeromonas hydrophila / Q000302:isolation & purification / Q000472:pathogenicity*; D000371:Agglutination; D000818:Animals; D005393:Fish Diseases / Q000382:microbiology*; D005618:Fresh Water; D016905:Gram-Negative Bacterial Infections / Q000382:microbiology / Q000662:veterinary*; D006384:Hemagglutination; D012621:Seasons; D014337:Trout; D014774:Virulence; D014871:Water Microbiology