2003 Spring meeting of the WPSA French Branch

Protais, J.; Quéguiner, Stéphane; Boscher, E.; Piquet, Jean-Côme; Nagard, Bérengère; Salvat, Gilles

doi:10.1080/00071660410001666718

Cited by 13 publications

(5 citation statements)

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“…In the present study, the TMAB counts being higher in the free-range, barn and organic eggs, compared to the eggs from caged hens, was likely attributed to the ability to effectively clean conventional battery cages. This might be explained by the air circulating in conventional cage systems containing less dust; hence, the eggshell surface of eggs have a lower number of TMAB, when compared to eggs produced in alternative systems (organic, free-range, and barn) as described elsewhere (Protais et al, 2003;, Huneau-Salaün et al, 2010). In agreement with our findings, De Reu et al ( 2005) reported higher total bacteria counts for free-range and barn eggs compared to eggs from hens housed in conventional battery cages.…”

Section: Discussionsupporting

confidence: 90%

Microbial and Antibiotic Resistant E. coli Contamination in Retail Eggs Produced by Alternative and Conventional Rearing Methods

Guran,

Esen,

Alali

2023

J Hellenic Vet Med Soc

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The aims of this study were to determine: i) the presence of total mesophilic aerobic bacteria (TMAB), total psychrophilic aerobic bacteria (TPAB) coliform, E. coli, Enterobacteriaceae and Salmonella in retail eggs produced in different poultry rearing systems, ii) Enterobacteriaceae species diversity, and iii) antibiotic resistance profile of E. coli isolates. A total of 350 retail eggs produced by four different rearing systems [organic (n= 100), free-range (n= 100), barn (n= 50) and conventional-cage (n=100)] were collected and characterized microbiologically. Out of the 350 eggs tested, the eggshell surface samples were contaminated, with TMAB, TPAB, coliform, E. coli and Enterobacteriaceae at positive percentages of 100%, 100%, 49.1%, 18.6% and 38%, respectively. The positive percentage of coliform, E. coli and Enterobacteriaceae were statistically significant between rearing systems (P<0.05). However, only mean numbers of TMAB were statistically significant between rearing systems (P<0.05). The contamination percent positive crushed eggshell samples, with TMAB, TPAB, coliform, E. coli and Enterobacteriaceae were 100%, 100%, 50%, 33.7% and 42.5%, respectively. Salmonella was detected from only one Enterobacteriaceae isolate obtained from an organic eggshell pool but not from eggshell surfaces or egg yolks. A total of 35 E. coli isolates were recovered from Enterobacteriaceae isolates. Twelve (34.3%) of them exhibited resistance to least one antibiotic tested. The dominant type of resistance was to ampicillin detected in all 12 E. coli isolates. This study provides valuable baseline data of the occurrence of species diversity of Enterobacteriaceae and antibiotic resistant E. coli in retail eggs produced by alternative or conventional-caged rearing methods which can be used for future risk assessments.

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Section: Discussionsupporting

confidence: 90%

Microbial and Antibiotic Resistant E. coli Contamination in Retail Eggs Produced by Alternative and Conventional Rearing Methods

Guran,

Esen,

Alali

2023

J Hellenic Vet Med Soc

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“…In further experimental studies, it was found that eggs from aviaries were more contaminated with aerobic bacteria than eggs from cage systems (Protais et al, 2003a;De Reu et al, 2005b). The difference was more than 1 log unit (up to 5.1 -6.0 log CFU/eggshell for eggs from aviaries), with much higher counts on those eggs laid on the floor of the aviaries (up to 7 log CFU/eggshell).…”

Section: Cage-and Non-cage Systemsmentioning

confidence: 97%

“…Protais et al (2003a) andDe Reu et al (2005b;2006c) found no effect of age of the hens on bacterial eggshell contamination. In one of the experiments performed by De Reu et al (2005b) a possible seasonal influence on the eggshell contamination was found with a decrease in the winter period (up to > 0.5 log CFU/eggshell) for total count of aerobic and Gram-negative bacteria.…”

Section: Influence Of Age and Seasonmentioning

confidence: 99%

Bacterial contamination of table eggs and the influence of housing systems

Reu¹,

Messens²,

Heyndrickx³

et al. 2008

World's Poultry Science Journal

109

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“…Reducing airborne bacteria and PM is essential to improving the air environment in animal houses. Aviary housing is an alternative egg production system that accommodates natural behaviors of the hens; however, much higher airborne PM and bacteria concentrations exist in aviary housing than in cage housing (Ellen et al, 2000;Protais et al, 2003;Hayes et al, 2012).…”

mentioning

confidence: 99%

Airborne Particulate Matter and Culturable Bacteria Reduction from Spraying Slightly Acidic Electrolyzed Water in an Experimental Aviary Laying-Hen Housing Chamber

et al. 2014

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Compared to conventional cage laying-hen houses, aviary hen houses generally have much higher concentrations of airborne dust and bacteria due to generation of bioaerosols by the hensâ€™ access to and activities on the litter floor. Hence, reducing these airborne agents is important to safeguard the health of the animals and workers in such housing systems. Spraying slightly acidic electrolyzed water (SAEW) is a novel approach to reducing airborne culturable bacteria (CB) and particulate matter (PM) levels in hen houses. The objective of this study was to evaluate the efficacy of reducing airborne CB and PM in an experimental aviary chamber by periodic spraying of SAEW (Trt), as compared to no spraying (Ctrl ns ) or spraying of tap water (Ctrl w ). The hens were provided 16 h light and 8 h dark (lights on at 6:00 h and off at 22:00 h) and were given access to the litter floor from 12:00 h to 22:00 h. The Trt regimen sprayed SAEW at 14:00 h for 15 min at a dosage of 80 mL m -2 ; the Ctrl ns regimen had no spraying; and the Ctrl w regimen sprayed tap water following the same procedure as with Trt. Concentrations of airborne CB and PM in six aerodynamic size ranges (0.65-1.1, 1.1-2.1, 2.1-3.3, 3.3-4.7, 4.7-7.1, and >7.1 Î¼m) were measured at 1.5 m above the floor in the center of the room during the periods of 13:45-14:00 h and 14:45-15:00 h. Compared to Ctrl ns , spraying SAEW significantly reduced airborne CB (>2.1Â Î¼m) by up to 49% Â±10% (p < 0.05), while Ctrl w did not show a reduction effect. No significant difference was found between Trt and Ctrl w in reducing airborne PM, although both reduced or tended to suppress PM >7.1 Î¼m in size. The results show that spraying SAEW can inactivate airborne CB attached to PM. Thus, this is a promising technique for alleviating the adverse health impacts of bioaerosols in aviary laying-hen housing systems. KeywordsAviary hen housing, Animal health and welfare, Indoor air quality (0.65-1.1, 1.1-2.1, 2.1-3.3, 3.3-4.7, 4.7-7.1, and >7.1 μm) were measured at 1.5 m above the floor in the center of the room during the peri-

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2003 Spring meeting of the WPSA French Branch

Cited by 13 publications

References 0 publications

Microbial and Antibiotic Resistant E. coli Contamination in Retail Eggs Produced by Alternative and Conventional Rearing Methods

Microbial and Antibiotic Resistant E. coli Contamination in Retail Eggs Produced by Alternative and Conventional Rearing Methods

Bacterial contamination of table eggs and the influence of housing systems

Airborne Particulate Matter and Culturable Bacteria Reduction from Spraying Slightly Acidic Electrolyzed Water in an Experimental Aviary Laying-Hen Housing Chamber

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