Bacterial contamination of eggs and behaviour of poultry flocks in the free range environment

Moyle, Talia S.; Drake, Kelly; Gole, Vaibhav C.; Chousalkar, Kapil K.; Hazel, Susan J.

doi:10.1016/j.cimid.2016.10.005

Cited by 22 publications

(20 citation statements)

References 23 publications

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“…Although our findings are similar to those of Moyle et al (2016), with enterobacteria counts ranging from 0.68 to 0.98 log CFU eggshell -1 in two evaluated flocks. When comparing free-range and battery cage systems in Australia, Parisi et al (2015) observed that mean counts of Enterobacteriaceae in free-range egg shells were about 1 log CFU/mL higher (90% greater) than in battery cage eggshells.…”

Section: Discussionsupporting

confidence: 62%

Microbiological vulnerability of eggs and environmental conditions in conventional and free-range housing systems

Galvão

Biondo

Possebon

et al. 2018

SCA

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Although Brazil is currently the world's eighth largest egg exporter, the shift of consumers towards free-range eggs may present new sanitary challenges. This study aims to evaluate the microbiological vulnerability of eggs and environmental conditions in a farm certified for both conventional and freerange systems using two standard methods (enterobacteria counting and Salmonella spp. survey). Two high-producing farms were selected for this study, one under both conventional and freerange systems at the same place as the test farm, and another under conventional system only as a control farm. Enterobacteriaceae counts were determined for eggshells; and detection of Salmonella spp. was conducted in eggs, nest box material, feeder, and sponge samples from water dispensers, feeders, production plant, besides water samples from nipple dispensers and artesian well. The average enterobacteria count (log CFUmL -1 ) was 0.09 for conventional and 1.73 for free-range systems (p < 0.001). While Salmonella spp. was not detected in the conventional system but was present in one feeder and three eggshells from the free-range system. Therefore, the conventional system demonstrated better hygiene-sanitary status than the free-range one. Moreover, controlling food safety should always be considered when improving animal welfare. Key words: Enterobacteria. Food safety. Microbial contamination. Public health. Salmonella spp. ResumoApesar do Brasil ser considerado o oitavo maior exportador mundial de ovos, mudanças nas preferências dos consumidores relacionadas a ovos produzidos em sistemas de pastejo livre, podem representar novos desafios sanitários. Neste estudo o objetivo foi avaliar a vulnerabilidade microbiológica dos ovos e ambiente de produção numa fazenda certificada para sistema convencional e de pastejo livre, utilizando dois métodos considerados padrão (contagem de Enterobactérias e pesquisa de Salmonella). Duas fazendas de alta produção de ovos foram selecionadas para o estudo, sendo que uma delas continha o sistema convencional e também o sistema de pastejo livre de criação na mesma localidade. A segunda fazenda (sistema convencional) foi utilizada como controle. A enumeração de enterobactérias

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Section: Discussionsupporting

confidence: 62%

Microbiological vulnerability of eggs and environmental conditions in conventional and free-range housing systems

Galvão

Biondo

Possebon

et al. 2018

SCA

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“…Free-range eggs have also tested positive for Salmonella in previous studies in SA. Moyle et al [91] reported that 1% of 100 pooled crush egg samples obtained from two free-range flocks from two different farms contained S. Mbandaka. An approximately similar result (1.34%) was found for the free-range eggs tested in the study of Gole et al [92].…”

Section: South Australiamentioning

confidence: 99%

Non-Typhoidal Salmonella at the Human-Food-of-Animal-Origin Interface in Australia

Sodagari

Wang

Robertson

et al. 2020

Animals

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Non-typhoidal Salmonella is a major zoonotic pathogen that plays a significant role in foodborne human salmonellosis worldwide through the consumption of contaminated foods, particularly those of animal origin. Despite a considerable reduction in human salmonellosis outbreaks in developed countries, Australia is experiencing a continuous rise of such outbreaks in humans. This review of the literature highlights the reported non-typhoidal Salmonella outbreaks in humans as well as the occurrence of the pathogen in foods from animal sources throughout Australia. Non-typhoidal Salmonella infections from food animals are more often associated with at-risk people, such as immunocompromised and aged people or children. Although several animal-sourced foods were recognised as the catalysts for salmonellosis outbreaks in Australia, egg and egg-based products remained the most implicated foods in the reported outbreaks. This review further highlights the antimicrobial resistance trends of non-typhoidal Salmonella isolates at the human–food interface, with a focus on clinically important antimicrobials in humans, by collating evidence from previous investigations in Australia. The rise in antimicrobial-resistant Salmonella, especially to antimicrobials commonly prescribed to treat human salmonellosis, has become a significant global public health concern. However, the overall prevalence of antimicrobial resistance in Australia is considerably lower than in other parts of the world, particularly in terms of critically important antimicrobials for the treatment of human salmonellosis. The present review adds to our understanding of the global epidemiology of non-typhoidal Salmonella with emphasis on the past few decades in Australia.

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“…With this possibility, it's vital to work out the bacteria count in different parts of the egg, including the surface and the internal contents. Currently, the extent of pore contamination of Enterobacteriaceae is unknown thanks to lack of research [18]. Enterobacteriaceae family is a crucial family, including Salmonella, leading the reason for the main foodborne illnesses [19].…”

Section: Is Free-range Safe?mentioning

confidence: 99%

<i>Campylobacter, Salmonella</i> and <i>Escherichia coli</i> Food Contamination Risk in Free-Range Poultry Production System

Adeboye¹,

Kwofie²,

Bukari³

2020

AiM

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Livestock such as poultry is consumed as food worldwide and it constitutes one of the main protein sources for diners, as well as an important source of revenue generation for farmers. Poultry meat production chain identifies a significant role of the farm to folk. Most often, the systems used in poultry production can result in a higher prevalence of Campylobacter, Salmonella, and Escherichia coli contamination, leading to adverse health effects with detrimental consequences. The method of poultry keeping plays a significant role in the poultry meats' outcome and its food safety standards. Farmers attempt to develop new poultry operations, however, there are two main possibilities; to operate within the present vertically integrated system which is incredibly good for disease prevention and to develop independently, or a smaller operation that is more animal friendly. This article reviews the available research on the impact of free-range poultry production systems on food safety, most importantly the prevalence and control of Campylobacter, Salmonella and Escherichia coli in free-range production systems. The results suggest a conflicting view when bacterial loads of poultry meat from conventional and free-range systems are compared. Studies have shown increased bacterial loads in a free-range production system.

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Bacterial contamination of eggs and behaviour of poultry flocks in the free range environment

Cited by 22 publications

References 23 publications

Microbiological vulnerability of eggs and environmental conditions in conventional and free-range housing systems

Microbiological vulnerability of eggs and environmental conditions in conventional and free-range housing systems

Non-Typhoidal Salmonella at the Human-Food-of-Animal-Origin Interface in Australia

<i>Campylobacter, Salmonella</i> and <i>Escherichia coli</i> Food Contamination Risk in Free-Range Poultry Production System

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Bacterial contamination of eggs and behaviour of poultry flocks in the free range environment

Cited by 22 publications

References 23 publications

Microbiological vulnerability of eggs and environmental conditions in conventional and free-range housing systems

Microbiological vulnerability of eggs and environmental conditions in conventional and free-range housing systems

Non-Typhoidal Salmonella at the Human-Food-of-Animal-Origin Interface in Australia

&lt;i&gt;Campylobacter, Salmonella&lt;/i&gt; and &lt;i&gt;Escherichia coli&lt;/i&gt; Food Contamination Risk in Free-Range Poultry Production System

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<i>Campylobacter, Salmonella</i> and <i>Escherichia coli</i> Food Contamination Risk in Free-Range Poultry Production System