title: Surface characters and extracellular toxins involved in the pathogenesis of Aeromonas hydrophila.
abstract: A small number of serotypically distinct strains of A. hydrophila obtained from diseased freshwater fish were examined for their pathogenic properties comprising of cell surface characteristics and extracellular toxins. Test strains exhibited homogeneity in their cell surface characteristics despite being serologically heterogeneous. Studies on extracellular biological activities revealed qualitative and quantitative differences in production of toxins, probably explaining their antigenic diversity. Three distinct proteases, namely heat stable metallo protease, heat labile serine protease and heat labile metallo protease were identified from the strains.
authors.affiliation: Department of Animal Science, School of Life Sciences, Bharathidasan University, Tiruchirappalli, India.
authors.forename: B V
authors.initials: BV
authors.lastname: Aruna
authors.forename: M R
authors.initials: MR
authors.lastname: Chandran
authors.forename: R D
authors.initials: RD
authors.lastname: Michael
authors.forename: S M
authors.initials: SM
authors.lastname: Logambal
mesh_terms: D016980:Aeromonas hydrophila / Q000302:isolation & purification / Q000378:metabolism / Q000472:pathogenicity*; D000818:Animals; D001427:Bacterial Toxins / Q000737:chemistry* / Q000378:metabolism; D002462:Cell Membrane / Q000737:chemistry / Q000378:metabolism; D005110:Extracellular Space; D005399:Fishes / Q000293:injuries / Q000382:microbiology; D008666:Metalloendopeptidases / Q000037:antagonists & inhibitors; D015842:Serine Proteinase Inhibitors / Q000378:metabolism*
chemical_list: D001427:Bacterial Toxins; D015842:Serine Proteinase Inhibitors; D008666:Metalloendopeptidases