Journal ArticleDOI
A note on microbial growth on hen egg‐shells
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Two strains of cuticle‐digesting pseudomonads were isolated from the surface of hens’ egg‐shells that had been stored in a humid atmosphere at 25 °C and Digestion was due to a protease, the demonstration of which was only achieved in media containing cuticle.Abstract:
1. Two strains of cuticle‐digesting pseudomonads were isolated from the surface of hens’ egg‐shells that had been stored in a humid atmosphere at 25 °C. Digestion was due to a protease, the demonstration of which was only achieved in media containing cuticle. 2. The egg‐shells were colonised by yeasts also, but the growth of these organisms appeared to be dependent upon the pseudomonads for the release of nutrients from the cuticle. 3. The pseudomonads would not grow on cuticle in situ unless the relative humidity was about 100%.read more
Citations
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Journal ArticleDOI
Eggshell factors influencing eggshell penetration and whole egg contamination by different bacteria, including Salmonella enteritidis☆
K. De Reu,Koen Grijspeerdt,Winy Messens,Marc Heyndrickx,Mieke Uyttendaele,Johan Debevere,Lieve Herman +6 more
TL;DR: In this paper, an agar approach was used to assess the bacterial eggshell penetration and the contamination of whole eggs with the selected bacterial strains; the intact shells of agar-filled and whole eggs were inoculated with 10(3) -10(4) cfu of the selected strains.
Journal ArticleDOI
Eggshell penetration by Salmonella : a review
TL;DR: In this paper, the penetratio of Salmonella infection through the shell of an egg was investigated. But the authors focused on the reproduction of the laying hens and not only the reproductive organs of the hens.
Journal ArticleDOI
Trans–shell infection by pathogenic micro–organisms reduces the shelf life of non–incubated bird's eggs: a constraint on the onset of incubation?
TL;DR: It is demonstrated that infection of egg contents is prevalent and occurs within the time required to lay a clutch, and that microbial infection and ambient temperature act independently to reduce egg viability considerably.
Journal Article
The Estimation of the Bactericidal Power of the Blood. With a Note by J. O. IRWIN.
A. A. Miles,S. S. Misra +1 more
TL;DR: The survival rate of Staph. aureus in a standard volume of denbrinated blood is a reliable quantitative measure of the bactericidal power of blood, and the number of viable organisms in the inoculum and in the blood-bacterium mixture may be estimated with the necessary accuracy by counts of colonies developing from measured volumes of the fluids let fall on to the surface of solid media as mentioned in this paper.
The Microbiology of Eggs
R. G. Board,H. S. Tranter +1 more
TL;DR: The older literature makes the occasional reference to the vulnerability of an eggshell to bacterial penetration at oviposition as mentioned in this paper, and several surveys have been carried out to investigate the routes of bacterial infection of eggs.
References
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Journal Article
Protein Measurement with the Folin Phenol Reagent
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The estimation of the bactericidal power of the blood.
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Quantitative Determination of Carbohydrates With Dreywood's Anthrone Reagent
Journal ArticleDOI
The effects of moisture and temperature on growth and spore germination in some fungi.
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Journal ArticleDOI
A new ultrasensitive method for the determination of proteolytic activity.
TL;DR: In contrast to other insoluble, non-covalent protein-dye complexes in use for the determination of proteolytic activity, the new chromogenic substrates are not affected by the presence of albumin.
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