A longitudinal field trial assesing the impact of feeding waste milk containing antibiotic residues on the prevalence of ESBL-producing Escherichia coli in calves

Brunton, Lucy A.; Reeves, Hannah; Snow, L. C.; Jones, Jeff

doi:10.1016/j.prevetmed.2014.08.005

Cited by 51 publications

(68 citation statements)

References 16 publications

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“…Likewise, on the individual calf level, feeding WM regardless of the type of antimicrobial treatment the cow was given led to an increased proportion of QREC in the calf feces. Likewise, WM feeding has been shown by others to increase the shedding of resistant E. coli in feces of calves (Wray et al, 1990;Aust et al, 2013;Brunton et al, 2014;Pereira et al, 2014b;Rebelo, 2014) and when the concentration of antimicrobials in WM is low (Pereira et al, 2014b). The use of fluoroquinolones during the previous 4 mo was low (only 1.2 cases per 100 cow-years) and hence, few of the calves in the current study could have been fed WM from fluoroquinolone-treated cows.…”

Section: Discussionmentioning

confidence: 56%

Risk factors for quinolone-resistant Escherichia coli in feces from preweaned dairy calves and postpartum dairy cows

Duse

Waller

Emanuelson

et al. 2015

Journal of Dairy Science

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Quinolone resistance may emerge in gut bacteria (e.g., in Escherichia coli) of animals. Such bacteria could cause infections in the animal itself or be transmitted to humans via the food chain. Quinolone resistance is also observed in fecal E. coli of healthy dairy cattle, but the prevalence varies between farms, not solely as a result of varying degree of fluoroquinolone exposure. The objective of this study was to identify risk factors for the fecal shedding of quinolone-resistant E. coli (QREC) from dairy calves and postpartum cows. Rectal swabs from 15 preweaned calves and 5 postpartum cows per farm were collected on 23 Swedish dairy farms to determine the prevalence of QREC. Risk factors for the shedding of QREC were investigated using multivariable statistical models. Quinolone-resistant E. coli were found on all but one farm. Factors associated with QREC shedding by calves were being younger than 18 d, being fed milk from cows treated with antimicrobials, recent use of fluoroquinolones in the herd, carriage of QREC by postpartum cows, and using the calving area never or rarely as a sick pen compared with often. Factors associated with QREC shedding by cows were calving in group pens or freestalls compared with single pens or tiestalls, purchasing cattle, sharing animal transports with other farmers, and poor farm hygiene. Proper biosecurity and improved hygiene, as well as minimizing fluoroquinolone exposure and waste milk feeding, may be important factors to reduce the burden of QREC on dairy farms.

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Section: Discussionmentioning

confidence: 56%

Risk factors for quinolone-resistant Escherichia coli in feces from preweaned dairy calves and postpartum dairy cows

Duse

Waller

Emanuelson

et al. 2015

Journal of Dairy Science

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“…The presence of large numbers of resistant species mostly in cheese made from raw milk might correlate with the presence of high levels of antibiotic residues in the milk environment (Brunton et al, 2014), as reported for other ecosystems (Gao et al, 2012;Fan and He, 2011). The lower numbers of resistant populations as compared to those susceptible do not appear to be associated with an intrinsic antagonist effect of antibiotic-containing media in growth.…”

Section: Discussionmentioning

confidence: 78%

Diversity and dynamics of antibiotic-resistant bacteria in cheese as determined by PCR denaturing gradient gel electrophoresis

Flórez

Mayo

2015

International Journal of Food Microbiology

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This work reports the composition and succession of tetracycline- and erythromycin-resistant bacterial communities in a model cheese, monitored by polymerase chain reaction denaturing gradient gel electrophoresis (PCR-DGGE). Bacterial 16S rRNA genes were examined using this technique to detect structural changes in the cheese microbiota over manufacturing and ripening. Total bacterial genomic DNA, used as a template, was extracted from cultivable bacteria grown without and with tetracycline or erythromycin (both at 25 μg ml(-1)) on a non-selective medium used for enumeration of total and viable cells (Plate Count agar with Milk; PCA-M), and from those grown on selective and/or differential agar media used for counting various bacterial groups; i.e., lactic acid bacteria (de Man, Rogosa and Sharpe agar; MRSA), micrococci and staphylococci (Baird-Parker agar; BPA), and enterobacteria (Violet Red Bile Glucose agar; VRBGA). Large numbers of tetracycline- and erythromycin-resistant bacteria were detected in cheese samples at all stages of ripening. Counts of antibiotic-resistant bacteria varied widely depending on the microbial group and the point of sampling. In general, resistant bacteria were 0.5-1.0 Log10 units fewer in number than the corresponding susceptible bacteria. The PCR-DGGE profiles obtained with DNA isolated from the plates for total bacteria and the different bacterial groups suggested Escherichia coli, Lactococcus lactis, Enterococcus faecalis and Staphylococcus spp. as the microbial types resistant to both antibiotics tested. This study shows the suitability of the PCR-DGGE technique for rapidly identifying and tracking antibiotic resistant populations in cheese and, by extension, in other foods.

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“…In this study, feeding calves with waste milk (milk of cows with antibiotic treatment) -although not found as a risk factor-continues to be a frequent activity in dairy farms of the municipality, despite current knowledge of the association between this practice and increased resistance to antimicrobials in calves (Langford et al, 2003;Aust et al, 2013;Brunton et al, 2014).…”

Section: Discussionmentioning

confidence: 81%

Presencia de Enterobacteriaceae productoras de betalactamasa de espectro extendido (ESBL) en leche de tanque a granel de granjas lecheras bovinas en Antioquia, Colombia

Vásquez-Jaramillo

Ramı́rez

Akineden

et al. 2017

Rev Colomb Cienc Pecu

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A longitudinal field trial assesing the impact of feeding waste milk containing antibiotic residues on the prevalence of ESBL-producing Escherichia coli in calves

Cited by 51 publications

References 16 publications

Risk factors for quinolone-resistant Escherichia coli in feces from preweaned dairy calves and postpartum dairy cows

Risk factors for quinolone-resistant Escherichia coli in feces from preweaned dairy calves and postpartum dairy cows

Diversity and dynamics of antibiotic-resistant bacteria in cheese as determined by PCR denaturing gradient gel electrophoresis

Presencia de Enterobacteriaceae productoras de betalactamasa de espectro extendido (ESBL) en leche de tanque a granel de granjas lecheras bovinas en Antioquia, Colombia

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