An assessment of the impacts of litter treatments on the litter quality and broiler performance: A systematic review and meta-analysis

Toledo, Taiani dos Santos de; Roll, Aline Arassiana Piccini; Rutz, Fernando; Dallmann, Henrique Müller; Prá, Marcos Antonio Dai; Roll, Victor Fernando Büttow

doi:10.1371/journal.pone.0232853

Cited by 22 publications

(9 citation statements)

References 67 publications

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“…Recent reviews of litter treatments showed that several litter amendments are suitable for use in poultry houses to reduce litter moisture and hence ammonia generation ( Cockerill et al., 2020 ; de Toledo et al., 2020 ).…”

Section: Methodological Approachmentioning

confidence: 99%

Potential contaminants and hazards in alternative chicken bedding materials and proposed guidance levels: a review

Gerber

Gould²,

McGahan³

2020

Poultry Science

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Bedding material or litter is an important requirement of meat chicken production which can influence bird welfare, health, and food safety. A substantial increase in demand and cost of chicken bedding has stimulated interest in alternative bedding sources worldwide. However, risks arising from the use of alternative bedding materials for raising meat chickens are currently unknown. Organic chemicals, elemental, and biological contaminants, as well as physical and management hazards need to be managed in litter to protect the health of chickens and consequently that of human consumers. This requires access to information on the transfer of contaminants from litter to food to inform risk profiles and assessments to guide litter risk management. In this review, contaminants and hazards of known and potential concern in alternative bedding are described and compared with existing standards for feed. The contaminants considered in this review include organic chemical contaminants (e.g., pesticides), elemental contaminants (e.g., arsenic, cadmium, and lead), biological contaminants (phytotoxins, mycotoxins, and microorganisms), physical hazards, and management hazards. Reference is made to scientific literature for acceptable levels of the above contaminants in chicken feed that can be used for guidance by those involved in selecting and using bedding materials.

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Section: Methodological Approachmentioning

confidence: 99%

Potential contaminants and hazards in alternative chicken bedding materials and proposed guidance levels: a review

Gerber

Gould²,

McGahan³

2020

Poultry Science

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“…Litter treatment amendments with acidifiers including aluminium sulphate, sodium bisulphate and ferric sulphate are being used to reduce the pH of litter material. Feed supplemented with zinc, 17 charcoal 18 and Yucca schidigera plant extract 19 can also be used to reduce NH 3 concentration in the environment. Saponins and polyphenols present in Yucca schidigera extract have urease inhibiting, antioxidant and antiviral properties 20 that may result in the reduction of NH 3 .…”

Section: Introductionmentioning

confidence: 99%

Recovery of E. coli From Liver and Spleen of Broiler Birds and the Effects of Induced High Ammonia Level on Haematobiochemical Parameters and Its Amelioration by Different Modifiers

et al. 2021

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The poultry sector is one of the most vibrant segments of the agriculture industry of Pakistan. In addition to different infections, ammonia (NH3) production from litter material of broiler is the most harmful pollutant and causes serious threats for the environment. To overcome this problem, different methods are proposed assuring poultry bird’s health and production. This study was carried out to evaluate the effect of toxic levels of NH3 on the haematology and serum proteins of broiler birds and its amelioration by using different modifiers. The recovery of Escherichia coli ( E. coli) from liver and spleen of broiler birds was also carried out. A total of 100 birds were divided into 5 separate groups (groups A–D). The groups C, D and E were treated with potassium aluminium sulphate, aluminium silicate and Yucca schidigera plant extract, respectively. Blood and tissue samples were collected after slaughtering the birds at 42 days of age. This study revealed increased RBC, total leucocyte count, Hb and heterophils percentage. Serum proteins were decreased in Yucca-treated and potassium aluminium sulphate–treated groups. This study concluded that NH3 production was reduced by the application of different modifiers, and these modifiers also neutralized the changes in blood parameters induced by NH3.

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“…The pH of reused litter was higher (7.12 ± 0.26) than fresh litter (6.54 ± 0.17) ( P = 0.028), while fresh litter had higher moisture (20.83 ± 3.54 %) than reused litter (14.65± 3.51 %) ( P = 0.11). Litter moisture and pH are known factors that affect pathogen survival and microbial diversity [45, 46].…”

Section: Discussionmentioning

confidence: 99%

Litter commensal bacteria can limit the horizontal gene transfer of antimicrobial resistance toSalmonellain chickens

Oladeinde

Abdo

Zwirzitz

et al. 2021

Preprint

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Host microbiome homeostasis ensures that gut conditions are unfavorable to an invading pathogen such as Salmonella enterica. Consequently, fostering a 'balanced' gut microbiome through the administration of microbes that can competitively exclude pathogens has gained a lot of attention and use in human and animal medicine. However, little is known on how competitive exclusion affects the transfer of antibiotic resistance. To shed more light on this question, we challenged neonatal broiler chicks raised on reused broiler chicken litter – a complex environment comprising of decomposing pine shavings, feces, uric acid, feathers, and feed, with Salmonella Heidelberg (S. Heidelberg), a model pathogen. We show that chicks raised on reused litter carried lower abundance of Salmonella and harbored a more uniform and diverse microbiome comprising of bacterial species that are known to provide colonization resistance towards Salmonella compared to chicks raised on fresh bedding composed of pine shavings. Additionally, these bacterial species were associated with a lower horizontal transfer of multidrug resistance genes to S. Heidelberg. Using in vitro competition experiments, we confirmed that conjugation between S. Heidelberg and E. coli strains from chicks raised on fresh litter resulted in the acquisition of multidrug resistant plasmids. Contrastingly, bacteriophage-mediated recombination between S. Heidelberg and E. coli strains made the acquisition of plasmid-mediated β-lactamase gene (blaCMY-2)possible. Collectively, this study demonstrates that competitive exclusion can reduce the transfer of antibiotic resistance and provides information on the bacterial species that can be explored for their benefits to reduce antibiotic resistance transfer.

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An assessment of the impacts of litter treatments on the litter quality and broiler performance: A systematic review and meta-analysis

Cited by 22 publications

References 67 publications

Potential contaminants and hazards in alternative chicken bedding materials and proposed guidance levels: a review

Potential contaminants and hazards in alternative chicken bedding materials and proposed guidance levels: a review

Recovery of E. coli From Liver and Spleen of Broiler Birds and the Effects of Induced High Ammonia Level on Haematobiochemical Parameters and Its Amelioration by Different Modifiers

Litter commensal bacteria can limit the horizontal gene transfer of antimicrobial resistance toSalmonellain chickens

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