Eggshell factors influencing eggshell penetration and whole egg contamination by different bacteria, including Salmonella enteritidis

Reu, Koen De; Grijspeerdt, K.; Messens, Winy; Heyndrickx, Marc; Uyttendaele, Mieke; Debevere, Johan; Herman, Lieve

doi:10.1016/j.ijfoodmicro.2006.04.011

Cited by 262 publications

(198 citation statements)

References 29 publications

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“…Egg washing is widely used in many countries including Australia (Hutchison et al 2004). It has been demonstrated that the extent of cuticle deposition can influence the egg shell penetration of Salmonella Enteritidis at 20 C (De Reu et al 2006). However, it is not clear how the measurements of cuticle cover undertaken in the present study correlate with the ease with which bacteria can pass through the egg shell.…”

Section: Discussionmentioning

confidence: 76%

“…It is difficult for bacteria to move across an intact good quality egg shell. However, small defects in the egg shell may provide means for bacteria on the egg shell to penetrate the shell and move into the egg contents (Messens et al 2005;De Reu et al 2006). The importance of the cuticle as a barrier against water loss and bacterial ingress into the egg has been discussed by several authors (Sparks and Board 1984) and it has also been suggested that egg shell translucency may facilitate bacterial penetration (Chousalkar et al 2010).…”

Section: Introductionmentioning

confidence: 99%

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Egg quality and age of laying hens: implications for product safety

Roberts¹,

Chousalkar²,

Samiullah³

2013

Anim. Prod. Sci.

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Abstract. Eggs were collected from commercial caged layer flocks in early, mid, late and very late lay. Eggs were candled and scored for translucency. Cuticle cover was estimated using MST Cuticle Stain and a Konica Minolta hand-held spectrophotometer. Traditional measures of egg quality were determined using specialised equipment. Shell ultrastructural features were scored following plasma ashing of shell samples and viewing under a benchtop scanning electron microscope. Translucency score was significantly higher in late lay than for all other age groups. Shell quality declined with increasing flock age. However, the extent of cuticle cover on the egg shell was not significantly different among flock age groups. The incidence of shell ultrastructural features associated with good quality shells was lower for older flocks and incidence of ultrastructural features associated with poorer quality shells was higher for older flocks. Translucency score had a low correlation with the ultrastructural features of the mammillary layer.

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Section: Discussionmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Egg quality and age of laying hens: implications for product safety

Roberts¹,

Chousalkar²,

Samiullah³

2013

Anim. Prod. Sci.

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“…Esses resultados podem ser respaldados por pesquisa realizada por De Reu et al 8 , que constataram que bactérias Gram-negativas, como Pseudomonas spp., penetraram facilmente pelos poros das cascas dos ovos e que a contaminação interna ocorreu, frequentemente, após quatro a cinco dias de armazenamento.…”

Section: Resultsunclassified

“…Trata-se de bastonete Gramnegativo aeróbio estrito, psicrotrófico, móvel com flagelação polar que está amplamente distribuído na natureza, sendo considerado um patógeno humano oportunista 8 . Andrade et al 9 encontraram aproximadamente 16% dos ovos comercializados em diversos pontos varejistas de Goiânia contaminados com Pseudomonas spp.. Essas bactérias são proteolíticas e alteram as características sensoriais e físico-químicas do ovo pela produção de substâncias, como ácido e gás sulfídrico, amoníaco, aminas, indol e ureia, e pela oxidação de ácidos graxos.…”

Section: Introductionunclassified

Qualidade bacteriológica de ovos contaminados com Pseudomonas aeruginosa e armazenados em temperatura ambiente ou refrigerados

et al. 2014

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BACTERIOLOGICAL QUALITY OF WASHED AND UNWASHED EGGS STORED UNDER ROOM TEMPERATURE AND REFRIGERATION AND CONTAMINATED WITH Pseudomonas aeruginosa ABSTRACTThe aim of this study was to evaluate the effect of sanitization and storage temperature on the quality of commercial eggs inoculated with Pseudomonas aeruginosa. We used 240 large eggs, without cracks, from Dekalb White laying hens at 30 to 40 weeks of age. The experimental design used was two blocks in a 2 x 2 factorial arrange (washed/non-washed and refrigerated/non-refrigerated) with twelve replicates. The eggs were contaminated by handling, with 1.5 x 10 5 colony-forming units (CFU) of Pseudomonas aeruginosa and stored at 5 °C and 25 °C for 30 days. Each ten days the eggshell and contents were submitted to bacteriological analyses. Variance analyses were performed and the data were compared by Tukey test. The results showed that Pseudomonas aeruginosa were isolated from the shells and contents of all eggs. Therefore, when the eggs were sanitized and stored at 5 ºC the contamination was less intense. The correlation between the presences of Pseudomonas aeruginosa in the shell and contents was high, when the eggs were not sanitized nor refrigerated. The conclusion of this study was that the egg must be sanitized and refrigerated when the stored for more than 30 days.

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“…Os ovos estão sujeitos à contaminação por Salmonella por meio da infecção do trato reprodutor antes da deposição da casca, a partir da instalação do agente etiológico na gema ou no albúmen (Shivaprasad et al, 1990), durante a passagem pela vagina (Miyamoto et al, 1997) ou, ainda, pelas fezes, quando os micro-organismos penetram pela casca do ovo (De Reu et al, 2006).…”

Section: Desenvolvimentounclassified

O pombo (Columba livia) como agente carreador de Salmonella spp. e as implicações em saúde pública

Rocha-e-Silva

Maciel

Teixeira³

et al. 2014

Arq. Inst. Biol.

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Os pombos domésticos e silvestres estão distribuídos por todo o mundo e carreiam micro-organismos patogênicos ao homem e a outros animais, podendo ser um dos responsáveis pela disseminação de Salmonella spp. Este patógeno gera grande preocupação para a economia mundial, uma vez que cria transtornos para a indústria avícola quando ocorre contaminação dos plantéis e ônus para a saúde pública devido a surtos de infecção alimentar causados por esta bactéria. Dessa forma, objetivou-se realizar um levantamento acerca da participação do pombo doméstico na possível disseminação de Salmonella spp.

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Eggshell factors influencing eggshell penetration and whole egg contamination by different bacteria, including Salmonella enteritidis

Cited by 262 publications

References 29 publications

Egg quality and age of laying hens: implications for product safety

Egg quality and age of laying hens: implications for product safety

Qualidade bacteriológica de ovos contaminados com Pseudomonas aeruginosa e armazenados em temperatura ambiente ou refrigerados

O pombo (Columba livia) como agente carreador de Salmonella spp. e as implicações em saúde pública

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