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  • 1990-1994  (6)
Publikationsart
Schlagwörter
Verlag/Herausgeber
Erscheinungszeitraum
Jahr
  • 1
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish diseases 13 (1990), S. 0 
    ISSN: 1365-2761
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie , Medizin
    Notizen: Abstract. Oxolinic acid and two new fluoroquinolones, ciprofloxacin and norfloxacin, were evaluated for in vitro antibacterial activity against Aeromonas salmonicida. Although oxolinic acid was as active as ciprofloxacin in terms of minimum inhibitory concentration (MIC), fluoroquinolones were significantly more active in terms of their ability to kill both oxolinic acid sensitive and resistant strains of A. salmonicida. Furthermore, the fluorinated drugs were active against non-dividing A. salmonicida. It would appear worthwhile to carry out further investigations with fluoroquinolones as they may be more effective in treating A. salmonicida infections than the current regime of oxolinic acid.
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish diseases 17 (1994), S. 0 
    ISSN: 1365-2761
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie , Medizin
    Notizen: Abstract. Eighty isolates of Aeromonas salmonicida, recovered from separate outbreaks of furunculosis in farmed and wild salmon in Scotland during 1988 and 1989, were examined for susceptibility to the β-lactam antibiotic amoxycillin. Susceptibility was determined in terms of minimum inhibitory concentration (MIC). All of the A. salmonicida subsp. salmonicida isolates investigated were susceptible to amoxycillin, with MICs of 0.30–1.50mg1-1. All of the A. salmonicida subsp. achromogenes isolates tested were resistant to amoxycillin, with MICs in excess of 500mgl-1. The A. salmonicida subsp. achromogenes produced a β-lactamase enzyme with a pI of approximately 8.0. The enzyme was inducible and its production was unaffected by plasmid curing with ethidium bromide, suggesting that resistance was chromosomal rather than plasmid mediated.
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish diseases 17 (1994), S. 0 
    ISSN: 1365-2761
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie , Medizin
    Notizen: Abstract. The ability of A-layer-positi ve (A+) and A-layer-negative (A−) strains of Aeromonas salmonicida to utilize haem sources of iron under conditions of iron-restriction was evaluated. In a plate bioassay, only A+ strains of A. salmonicida were able to utilize haem from a variety of sources including haem, haemin, myoglobin, haemoglobin, haemoglobin- haptoglobin and haem-albumin complexes. Trypsin-digestion of whole cells abolished haem- binding, indicating that binding was cell-surface associated, involving a protein binding site or receptor. Competitive binding studies indicated that all haem compounds were bound by a common receptor, which was not iron-regulated and was associated with the presence of the 49-kDa A-layer protein. The ability of both typical A+ (siderophore-positive) and atypical A+ (siderophore-negative) strains to utilize haem indicated that the mechanism of haem utilization was not siderophore-mediated and that A. salmonicida possesses both siderophore-dependent and siderophore-independent mechanisms to overcome iron-restricted conditions encountered in vivo.
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish diseases 15 (1992), S. 0 
    ISSN: 1365-2761
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie , Medizin
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish diseases 14 (1991), S. 0 
    ISSN: 1365-2761
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie , Medizin
    Notizen: Abstract. Oxolinic acid and five new fluoroquinolones, sarafloxacin, enrofloxacin, PD127, 391, PD117, 596 and C1934, were evaluated for in vitro activity against Aeromonas salmonicida. Sarafloxacin, enrofloxacin, PD127, 391 and PD117, 596 were significantly more active than cither oxolinic acid or C1934 in terms of their bactericidal activity against both oxolinic-acid-resistant and sensitive strains of A. salmonicida, killing 99% of the bacteria after 1h exposure. Resistant mutants developed at lower frequency to the fluoroquinolones than to oxolinic acid or oxytctracycline at 5, 10 and 20 times the MIC. However, mutants selected with one quinolone were cross-resistant to all the other quinolones tested.
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Springer
    Antonie van Leeuwenhoek 60 (1991), S. 67-72 
    ISSN: 1572-9699
    Schlagwort(e): haemolysin ; Aeromonas hydrophila
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Five strains ofAeromonas hydrophila were studied for production of haemolysin specific for erythrocytes of various animal species using three cultural methods. All the strains produced haemolysin for all the erythrocyte species when the organisms were cultured on blood agar. Using cellophane overlay method, all the strains produced haemolysin for fish erythrocytes and variable activity to mammalian erythrocytes. Only one strain produced haemolytic activity for various though not all of the erythrocyte species when grown in brain heart infusion broth. Data suggest thatA. hydrophila produces multiple haemolysins with specificities for erythrocytes of different animals. This was confirmed for trout and horse erythrocyte targeted haemolysins, by using iso-electric focussing separation and by measuring the effect of addition of ammonium sulphate to the growth medium.
    Materialart: Digitale Medien
    Standort Signatur Einschränkungen Verfügbarkeit
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