330 – Factors potentially linked with the occurrence of antimicrobial resistance in selected bacteria from cattle chickens and pigs – A scoping review (Research paper – Murphy – 2018)

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330 Research paper – Murphy – 2018 – Factors potentially linked with the occurrence of antimicrobial resistance in selected bacteria from cattle chickens and pigs_A scoping review

In Significant Impact Groups: Other
Species targeted: Pigs; Poultry; Beef;
Age: Young; Adult;
Summary:
Antimicrobial resistance is a complex issue with a large volume of published literature, and there is a need for synthesis of primary studies for an integrated understanding of this topic. A comprehensive literature search and screening were performed to identify studies investigating factors potentially linked with antimicrobial resistance in Campylobacter species, Escherichia coli and Salmonella enterica along the farm‐to‐fork pathway (farm, abattoir (slaughter houses) and retail meats) for the major Canadian livestock species (beef cattle, broiler chicken and pigs). The most common factors identified were antimicrobial use and type of farm management system (e.g., antibiotic‐free, organic). There are still insufficient research done on the effect of vaccination, industry‐specific factors (e.g., livestock density) and factors at sites other than farm along the agri‐food chain. Further investigation of these factors and other relevant industry activities are needed in order to identify effective interventions to decrease antimicrobial resistance along the agri‐food chain.

Where to find the original material: https://onlinelibrary.wiley.com/doi/full/10.1111/zph.12515; https://doi.org/10.1111/zph.12515
Country: CA

329 – Comparison of competitive exclusion with classical cleaning and disinfection on bacterial load in pig nursery units (Research paper – Luyckx – 2016)

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329 Research paper – Luyckx – 2016 – Comparison of competitive exclusion with classical cleaning and disinfection on bacterial load in pig nursery units

In Significant Impact Groups: Biosecurity
Species targeted: Pigs;
Age: Young;
Summary:
Colonization of the environment of nursery units by pathogenic micro-organisms is an important factor in the persistence and spread of endemic diseases in pigs and zoonotic pathogens. These pathogens are generally controlled by the use of antibiotics and disinfectants. Since an increasing resistance against these measures has been reported in recent years, methods such as competitive exclusion (CE) are promoted as promising alternatives. Results in this study showed despite sufficient administration of probiotic-type spores, the analysed bacteria did not decrease in number after 3 production rounds in CE units, indicating no competitive exclusion. There was also no effect on feed conversion and faecal consistency (indicator for enteric diseases) was noticed. These results indicate that the CE protocol is not a valuable alternative for classical Cleaning & Disinfection protocols.

Where to find the original material: https://link.springer.com/article/10.1186/s12917-016-0810-9; https://doi.org/10.1186/s12917-016-0810-9
Country: BE

328 – A 10-day vacancy period after cleaning and disinfection has no effect on the bacterial load in pig nursery units (Research paper – Luyckx – 2016)

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328 Research paper – Luyckx – 2016 – A 10-day vacancy period after cleaning and disinfection has no effect on the bacterial load in pig nursery units

In Significant Impact Groups: Biosecurity
Species targeted: Pigs;
Age: Young;
Summary:
Biosecurity measures such as cleaning, disinfection and a vacancy period between production cycles on pig farms are essential to prevent disease outbreaks. However, no studies have tested the effect of a longer vacancy period on bacterial load in nursery units. This study evaluates the effect of a 10-day vacancy period in pig nursery units on total aerobic flora, Enterococcus spp., Escherichia coli, faecal coliforms and methicillin resistant Staphylococcus aureus (MRSA). Three vacancy periods of 10 days were monitored, each time applied in 3 units. The microbiological load was measured before disinfection and at 1, 4, 7 and 10 days after disinfection. Results show that prolonging the vacancy period in nursery units to 10 days after disinfection with no extra biosecurity measures has no impact on the environmental load of total aerobic flora, E. coli, faecal coliforms, MRSA and Enterococcus spp.

Where to find the original material: https://bmcvetres.biomedcentral.com/articles/10.1186/s12917-016-0850-1; https://doi.org/10.1186/s12917-016-0850-1
Country: BE

327 – On-farm comparisons of different cleaning protocols in broiler houses (Research paper – Luyckx – 2015)

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327 Research paper – Luyckx – 2015 – On-farm comparisons of different cleaning protocols in broiler houses

In Significant Impact Groups: Biosecurity
Species targeted: Poultry;
Age: Young;Adult;
Summary:
The present study evaluated the effectiveness of 4 cleaning protocols designed to reduce the bacteriological infection pressure on broiler farms and prevent food-borne zoonoses. Additionally, difficult to clean locations and possible sources of infection were identified. Cleaning and disinfection rounds were evaluated in by sampling 12 broiler houses on 5 farms. Bacterial counts counts on the swab samples showed that cleaning protocols which were preceded by an overnight soaking with water caused a higher bacterial reduction compared to protocols without a preceding soaking step. Moreover, soaking of broiler houses leads to less water consumption and reduced working time during high pressure cleaning. No differences were found between protocols using cold or warm water during cleaning. Drinking cups, drain holes, and floor cracks were identified as critical locations for cleaning and disinfection in broiler houses.

Where to find the original material: https://www.sciencedirect.com/science/article/pii/S0032579119322308; https://doi.org/10.3382/ps/pev143
Country: BE

326 – Vaccines as alternatives to antibiotics for food producing animals Part 2 (Research paper – Hoelzer – 2018)

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326 Research paper – Hoelzer – 2018 – Vaccines as alternatives to antibiotics for food producing animals Part 2

In Significant Impact Groups: Pathogen management \ Vaccination; Specific alternatives
Species targeted: Pigs; Poultry; Dairy; Beef; Sheep; Other;
Age: Young; Adult;
Summary:
This article highlights new approaches and potential solutions for the development of vaccines as alternatives to antibiotics in food producing animals. Many current vaccines fall short of ideal vaccines in one or more respects. Promising breakthroughs to overcome these limitations include new biotechnology techniques, new oral vaccine approaches, novel adjuvants, new delivery strategies based on bacterial spores, and live recombinant vectors; they also include new vaccination strategies in-ovo, and strategies that simultaneously protect against multiple pathogens. However, translating this research into commercial vaccines that effectively reduce the need for antibiotics will require close collaboration among stakeholders, for instance through public–private partnerships. Targeted research and development investments and concerted efforts by all affected are needed to realize the potential of vaccines to improve animal health, safeguard agricultural productivity, and reduce antibiotic consumption and resulting resistance risks.

Where to find the original material: https://veterinaryresearch.biomedcentral.com/articles/10.1186/s13567-018-0561-7?optIn=true; https://doi.org/10.1186/s13567-018-0561-7
Country: USA; UK; FR; BE; DE

325- Vaccines as alternatives to antibiotics for food producing animals Part 1 (Research paper – Hoelzer – 2018)

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325 Research paper – Hoelzer – 2018 – Vaccines as alternatives to antibiotics for food producing animals Part 1

In Significant Impact Groups: Pathogen management \ Vaccination; Specific alternatives
Species targeted: Pigs; Poultry; Dairy; Beef; Sheep;
Age: Young; Adult;
Summary:
Vaccines and other alternative products can help minimize the need for antibiotics by preventing and controlling infectious diseases in animal populations, and are central to the future success of animal agriculture. This article, synthesizes and expands on the expert panel discussions regarding opportunities, challenges and needs for the development of vaccines that may reduce the need for use of antibiotics in animals. Vaccines are widely used to prevent infections in food animals. Various studies have demonstrated that their animal agricultural use can lead to significant reductions in antibiotic consumption, making them promising alternatives to antibiotics. To be widely used in food producing animals, vaccines have to be safe, effective, easy to use, and cost-effective. Although vaccines have the potential to improve animal health, safeguard agricultural productivity, and reduce antibiotic consumption and resulting resistance risks, targeted research and development investments and concerted efforts are needed to realize that potential.

Where to find the original material: https://link.springer.com/article/10.1186/s13567-018-0560-8; https://doi.org/10.1186/s13567-018-0560-8
Country: USA; UK; FR; BE; DE

324- Use of phytobiotics in broiler nutrition an alternative to infeed antibiotics (Research paper – Grashorn – 2010)

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324 Research paper – Grashorn – 2010 – Use of phytobiotics in broiler nutrition an alternative to infeed antibiotics

In Significant Impact Groups: Feed / gut health \ Feed additives and supplements; Specific alternatives
Species targeted: Poultry;
Age: Young; Adult;
Summary:
After the ban of antibiotic growth promoters (AGP) in the EU many alternative substances have been investigated for their potential to replace AGPs. Phytobiotics are discussed as one promising alternative due because they contain many pharmacologically active compounds. A huge number of studies have confirmed a wide range of activities of phytobiotics in poultry nutrition like stimulation of feed intake, antimicrobial, coccidiostatic and anthelmintic effects. The present paper gives a short review on the characteristics of phytobiotics, on the potential mode of action and on the effects of phytobiotics in diets on performance, carcass and meat quality and health status in broilers. Furthermore, it addresses possible safety concerns involving application of phytobiotics.
324

Where to find the original material: http://www.jafs.com.pl/Use-of-phytobiotics-in-broiler-nutrition-n-an-alternative-to-infeed-antibiotics-,66297,0,2.html; https://doi.org/10.22358/jafs/66297/2010
Country: DE

323 Risk for the development of Antimicrobial Resistance AMR due to feeding of calves with milk containing residues of antibiotics (Research report – EFSA Panel on Biological Hazards – 2016)

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323 Research report – EFSA Panel on Biological Hazards – 2016 – Risk for the development of Antimicrobial Resistance AMR due to feeding of calves with milk containing residues of antibiotics

In Significant Impact Groups: Other
Species targeted: Dairy;
Age: Young;
Summary:
This reports assess both the risk for the development of antimicrobial resistance (AMR) due to feeding on farm of calves with colostrum containing residues of antibiotics; and risk for the development of AMR due to feeding on farm of calves with milk of cows treated during lactation with an antibiotic and milked during the withdrawal period. It also proposes options to limit the risk of AMR derived from such practices. Treatment of dairy cows during the dry period and during lactation is common. Milk from cows receiving antimicrobial treatment during lactation contains residues during the treatment and withdrawal period, and this milk will lead to increased faecal shedding of antimicrobial-resistant bacteria by calves. A range of possible options exist for restricting the feeding of such milk to calves. b-Lactamases can reduce the concentration of b-lactams. Options to limit these bacteria in raw milk or colostrum are based on thermal inactivation.

Where to find the original material: https://efsa.onlinelibrary.wiley.com/doi/full/10.2903/j.efsa.2017.4665; https://doi.org/10.2903/j.efsa.2017.4665
Country: Not applicable (European Commission)

322 – Antimicrobial Resistance on Farms – A Review Including Biosecurity and the Potential Role of Disinfectants in Resistance Selection (Research paper – Davies – 2019)

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322 Research paper – Davies – 2019 – Antimicrobial Resistance on Farms_ A Review Including Biosecurity and the Potential Role of Disinfectants in Resistance Selection

In Significant Impact Groups: Biosecurity
Species targeted: Pigs; Poultry; Dairy; Beef; Other;
Age: Not stated;
Summary:
Efforts to limit antimicrobial resistance (AMR) on farms have mostly focused on control of the supply and use of antimicrobial drugs, plus husbandry measures to reduce infectious disease. In the United Kingdom and some other countries, substantial progress has been made recently against targets on agricultural antimicrobial drug use. However, resistant bacteria can persist and spread within and between premises despite declining or zero antimicrobial drug use. Reasons for this include: bacterial adaptations, horizontal transmission of genetic resistance determinants between bacteria, physical transfer of bacteria via movement (of animals, workers, and equipment), ineffective cleaning and disinfection, and co-selection of resistance to certain drugs by use of other antimicrobials, heavy metals, or biocides. Aspects of biosecurity have repeatedly been identified as risk factors for the presence of AMR on farm premises, but there are still large gaps in our understanding of the most important risk factors and the most effective interventions.

Where to find the original material: https://onlinelibrary.wiley.com/doi/full/10.1111/1541-4337.12438; https://doi.org/10.1111/1541-4337.12438
Country: UK

321 – Risk Factors for AMR in Escherichia coli in Pigs Receiving Oral Antimicrobial Treatment – A Systematic Review (Research paper – Burow – 2017)

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321 Research paper – Burow – 2017 – Risk Factors for AMR in Escherichia coli in Pigs Receiving Oral Antimicrobial Treatment A Systematic Review

In Significant Impact Groups: Other
Species targeted: Pigs;
Age: Young; Adult;
Summary:
The aim of this literature review was to identify risk factors (besides antimicrobial treatment) for antimicrobial resistance (AMR) occurrence in commensal Escherichia coli in pigs. A variety of studies were searched in 2014 and 2015. It was reported that space allowance, production size/stage, cleanliness, entry of animals and humans into herds, dosage/frequency/route of administration, time span between treatment and sampling date, herd size, distance to another farm, coldness, and season had an impact on AMR occurrence. However, further research is needed on the effects of specific management practices to develop well-founded management advice.

Where to find the original material: https://www.liebertpub.com/doi/full/10.1089/mdr.2015.0318; https://doi.org/10.1089/mdr.2015.0318
Country: DE