Characterisation of some Ornithobacterium rhinotracheale strains and examination of their transmission via eggs

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Abstract

The biochemical characteristics and antibiotic susceptibility of 12 Ornithobacterium rhinotracheale strains isolated from chickens and turkeys suffering from respiratory clinical signs and the survival of some isolates on egg-shell and within chicken eggs during hatching were examined. All O. rhinotracheale strains showed typical biochemical characteristics. Among the 16 drugs examined, penicillin G, ampicillin (MICs ranging from ≤ 0.06 μg/ml to 1 μg/ml), ceftazidim (with MICs from ≤ 0.06 μg/ml to 0.12 μg/ml), erythromycin, tylosin, tilmicosin (with some exceptions MICs ranged from ≤ 0.06 μg/ml to 1 μg/ml) and tiamulin (MICs varied from ≤ 0.06 μg/ml to 2 μg/ml) were the most effective. Lincomycin, oxytetracycline and enrofloxacin also gave good inhibitions, but with most strains in a higher concentration (MICs ranged in most cases from 2 μg/ml to 8 μg/ml). The other antibiotics inhibited the growth of O. rhinotracheale only in very high concentrations (colistin) or not at all (apramycin, spectinomycin, polymyxin B). At 37°C, O. rhinotracheale did not survive on egg-shell for more than 24 hours, while upon inoculation into embryonated chicken eggs it killed embryos by the ninth day, and from the 14th day post-inoculation no O. rhinotracheale could be cultured from the eggs at all. These results suggest that O. rhinotracheale is not transmitted via eggs during hatching.

Original languageEnglish
Pages (from-to)125-130
Number of pages6
JournalActa Veterinaria Hungarica
Volume49
Issue number2
DOIs
Publication statusPublished - 2001

Fingerprint

Ornithobacterium
Ornithobacterium rhinotracheale
Eggs
Egg Shell
Chickens
chicken eggs
Tylosin
Spectinomycin
egg shell
Anti-Bacterial Agents
Lincomycin
Colistin
Polymyxin B
Oxytetracycline
Penicillin G
Erythromycin
Ampicillin
hatching
antibiotics
apramycin

Keywords

  • Antibiotic susceptibility
  • Egg transmission
  • Ornithobacterium rhinotracheale

ASJC Scopus subject areas

  • veterinary(all)

Cite this

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title = "Characterisation of some Ornithobacterium rhinotracheale strains and examination of their transmission via eggs",
abstract = "The biochemical characteristics and antibiotic susceptibility of 12 Ornithobacterium rhinotracheale strains isolated from chickens and turkeys suffering from respiratory clinical signs and the survival of some isolates on egg-shell and within chicken eggs during hatching were examined. All O. rhinotracheale strains showed typical biochemical characteristics. Among the 16 drugs examined, penicillin G, ampicillin (MICs ranging from ≤ 0.06 μg/ml to 1 μg/ml), ceftazidim (with MICs from ≤ 0.06 μg/ml to 0.12 μg/ml), erythromycin, tylosin, tilmicosin (with some exceptions MICs ranged from ≤ 0.06 μg/ml to 1 μg/ml) and tiamulin (MICs varied from ≤ 0.06 μg/ml to 2 μg/ml) were the most effective. Lincomycin, oxytetracycline and enrofloxacin also gave good inhibitions, but with most strains in a higher concentration (MICs ranged in most cases from 2 μg/ml to 8 μg/ml). The other antibiotics inhibited the growth of O. rhinotracheale only in very high concentrations (colistin) or not at all (apramycin, spectinomycin, polymyxin B). At 37°C, O. rhinotracheale did not survive on egg-shell for more than 24 hours, while upon inoculation into embryonated chicken eggs it killed embryos by the ninth day, and from the 14th day post-inoculation no O. rhinotracheale could be cultured from the eggs at all. These results suggest that O. rhinotracheale is not transmitted via eggs during hatching.",
keywords = "Antibiotic susceptibility, Egg transmission, Ornithobacterium rhinotracheale",
author = "J. Varga and L. Fodor and L. Makrai",
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AU - Varga, J.

AU - Fodor, L.

AU - Makrai, L.

PY - 2001

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N2 - The biochemical characteristics and antibiotic susceptibility of 12 Ornithobacterium rhinotracheale strains isolated from chickens and turkeys suffering from respiratory clinical signs and the survival of some isolates on egg-shell and within chicken eggs during hatching were examined. All O. rhinotracheale strains showed typical biochemical characteristics. Among the 16 drugs examined, penicillin G, ampicillin (MICs ranging from ≤ 0.06 μg/ml to 1 μg/ml), ceftazidim (with MICs from ≤ 0.06 μg/ml to 0.12 μg/ml), erythromycin, tylosin, tilmicosin (with some exceptions MICs ranged from ≤ 0.06 μg/ml to 1 μg/ml) and tiamulin (MICs varied from ≤ 0.06 μg/ml to 2 μg/ml) were the most effective. Lincomycin, oxytetracycline and enrofloxacin also gave good inhibitions, but with most strains in a higher concentration (MICs ranged in most cases from 2 μg/ml to 8 μg/ml). The other antibiotics inhibited the growth of O. rhinotracheale only in very high concentrations (colistin) or not at all (apramycin, spectinomycin, polymyxin B). At 37°C, O. rhinotracheale did not survive on egg-shell for more than 24 hours, while upon inoculation into embryonated chicken eggs it killed embryos by the ninth day, and from the 14th day post-inoculation no O. rhinotracheale could be cultured from the eggs at all. These results suggest that O. rhinotracheale is not transmitted via eggs during hatching.

AB - The biochemical characteristics and antibiotic susceptibility of 12 Ornithobacterium rhinotracheale strains isolated from chickens and turkeys suffering from respiratory clinical signs and the survival of some isolates on egg-shell and within chicken eggs during hatching were examined. All O. rhinotracheale strains showed typical biochemical characteristics. Among the 16 drugs examined, penicillin G, ampicillin (MICs ranging from ≤ 0.06 μg/ml to 1 μg/ml), ceftazidim (with MICs from ≤ 0.06 μg/ml to 0.12 μg/ml), erythromycin, tylosin, tilmicosin (with some exceptions MICs ranged from ≤ 0.06 μg/ml to 1 μg/ml) and tiamulin (MICs varied from ≤ 0.06 μg/ml to 2 μg/ml) were the most effective. Lincomycin, oxytetracycline and enrofloxacin also gave good inhibitions, but with most strains in a higher concentration (MICs ranged in most cases from 2 μg/ml to 8 μg/ml). The other antibiotics inhibited the growth of O. rhinotracheale only in very high concentrations (colistin) or not at all (apramycin, spectinomycin, polymyxin B). At 37°C, O. rhinotracheale did not survive on egg-shell for more than 24 hours, while upon inoculation into embryonated chicken eggs it killed embryos by the ninth day, and from the 14th day post-inoculation no O. rhinotracheale could be cultured from the eggs at all. These results suggest that O. rhinotracheale is not transmitted via eggs during hatching.

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