Relations between the consumption of antimicrobial growth promoters and the occurrence of resistance among Enterococcus faecium isolated from broilers
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Relations between the consumption of antimicrobial growth promoters and the occurrence of resistance among Enterococcus faecium isolated from broilers. / Emborg, H D; Andersen, J S; Seyfarth, A M; Wegener, Henrik Caspar.
In: Epidemiology and Infection, Vol. 132, No. 1, 01.2004, p. 95-105.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Relations between the consumption of antimicrobial growth promoters and the occurrence of resistance among Enterococcus faecium isolated from broilers
AU - Emborg, H D
AU - Andersen, J S
AU - Seyfarth, A M
AU - Wegener, Henrik Caspar
PY - 2004/1
Y1 - 2004/1
N2 - The present study investigates, at farm level, the effect of the time-span between sampling and the last time a particular antimicrobial growth promoter (AGP) was included in the feed on the probability of selecting an AGP-resistant Enterococcus faecium isolate from a broiler flock. The probability that a randomly selected E. faecium isolate was resistant to avilamycin, erythromycin or virginiamycin was 0.91, 0.92 and 0.84, respectively if the isolate originated from a broiler flock fed either avilamycin- or virginiamycin-supplemented feed. As the time-span between sampling and the last AGP consumption increased, the probability of isolating an E. faecium isolate resistant to a particular AGP decreased (probability <0.2 within 3-5 years after last exposure to AGPs). The decrease in probability over time showed little farm-to-farm variation. The number of times a particular AGP was given to previous flocks reared in the same house had no effect on the probability of isolating a resistant isolate.
AB - The present study investigates, at farm level, the effect of the time-span between sampling and the last time a particular antimicrobial growth promoter (AGP) was included in the feed on the probability of selecting an AGP-resistant Enterococcus faecium isolate from a broiler flock. The probability that a randomly selected E. faecium isolate was resistant to avilamycin, erythromycin or virginiamycin was 0.91, 0.92 and 0.84, respectively if the isolate originated from a broiler flock fed either avilamycin- or virginiamycin-supplemented feed. As the time-span between sampling and the last AGP consumption increased, the probability of isolating an E. faecium isolate resistant to a particular AGP decreased (probability <0.2 within 3-5 years after last exposure to AGPs). The decrease in probability over time showed little farm-to-farm variation. The number of times a particular AGP was given to previous flocks reared in the same house had no effect on the probability of isolating a resistant isolate.
KW - Animal Feed
KW - Animal Husbandry
KW - Animals
KW - Anti-Bacterial Agents
KW - Chickens
KW - Denmark
KW - Drug Administration Schedule
KW - Drug Resistance, Bacterial
KW - Enterococcus faecium
KW - Erythromycin
KW - Gram-Positive Bacterial Infections
KW - Linear Models
KW - Logistic Models
KW - Markov Chains
KW - Microbial Sensitivity Tests
KW - Monte Carlo Method
KW - Oligosaccharides
KW - Poultry Diseases
KW - Time Factors
KW - Vancomycin
KW - Virginiamycin
KW - Journal Article
M3 - Journal article
C2 - 14979595
VL - 132
SP - 95
EP - 105
JO - Epidemiology and Infection
JF - Epidemiology and Infection
SN - 0950-2688
IS - 1
ER -
ID: 172847939