Comparative study of virulence and virulence factors of Aeromonas hydrophila strains isolated from water and sediments of a river.
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.
Mateos
D
D
Departamento de Patología Animal (Sanidad Animal), Microbiología e Inmunología, Facultad de Veterinaria, Universidad de León, Spain.
Anguita
J
J
Rivero
O
O
Naharro
G
G
Paniagua
C
C
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