Systemic administration of lipopolysaccharide in laying hens stimulates antimicrobial properties of egg white against Staphylococcus aureus

Bedrani, Larbi; Helloin, Emmanuelle; Guyot, Nicolas; Nys, Yves

doi:10.1016/j.vetimm.2012.12.014

Cited by 11 publications

(9 citation statements)

References 20 publications

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“…The agglutinant activity of the eggs was increased when the parental generation was supplemented with thymol, independently from the parents being submitted to a CHS condition or not. The antimicrobial activity is part of the innate branch of the immune system that provides nonspecific protection against potentially pathogens 45 . On the other hand, the agglutinant activity analyzed is part of the acquired branch of the immune system that in this work was assessed by the production of specific antibodies against Salmonella Enteritidis 60 .…”

Section: Discussionmentioning

confidence: 99%

“…For example, the supplementation of grey partridges with carotenoids increased the concentration of lysozyme (an antimicrobial enzyme) in the egg albumen 40 . On another case, the exposure of laying hens to an immune challenge with lipopolysaccharides of Salmonella increased the antibacterial activity of the egg albumen against Staphylococcus aureus 45 . Lastly, hormones in eggs, such as testosterone, has been reported to affect the immunoglobulin concentration present in the albumen 43 .…”

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confidence: 99%

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Immediate and transgenerational effects of thymol supplementation, inactivated Salmonella and chronic heat stress on representative immune variables of Japanese quail

Videla

Giayetto

Fernández

et al. 2020

Sci Rep

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Environmental challenges are integrated in the inmunoneuroendocrine interplay, impacting the immune system of the challenged individuals, and potentially implying transgenerational effects on their offspring. This study addressed whether dietary supplementation with thymol can modulate the immune response of adult Japanese quail when simultaneously exposed to an inoculum of inactivated Salmonella Enteritidis and a chronic heat stress (CHS). We also evaluated whether the experienced situations by adults can affect the immune response of their undisturbed offspring. In the parental generation, supplemented quail exposed to CHS had a higher inflammatory response and similar values of the heterophil/lymphocyte (H/L) ratio than those that were not supplemented. In their offspring, those chicks whose parents were exposed to CHS showed higher inflammatory response and lower antibody production. Regarding the H/L ratio, chicks whose parents were supplemented showed lower H/L ratio values. Dietary supplementation with thymol partially and positively modulated the inflammatory response and avoided H/L ratio alteration in the parental generation exposed to high environmental temperatures, suggesting these adults were better at dealing with the challenge. The lower H/L ratio values in the offspring suggests that chicks are more capable to deal with potential stressful situations associated with conventional breeding conditions.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Immediate and transgenerational effects of thymol supplementation, inactivated Salmonella and chronic heat stress on representative immune variables of Japanese quail

Videla

Giayetto

Fernández

et al. 2020

Sci Rep

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“…In contrast, increasing amounts of lysozyme and ovotransferrin could be more difficult, since this might require a reduction in other aspects of albumen quality such as nutrition for the developing embryo. Experimental studies in chickens showing that egg white antimicrobial properties can be altered without changing lysozyme and ovotransferrin activities lend support to this idea [39,61,62]. Measuring the antimicrobial activity of whole albumen directly, in addition to concentrations of individual antimicrobial proteins, will yield additional insights.…”

Section: Discussionmentioning

confidence: 99%

Are antimicrobial defences in bird eggs related to climatic conditions associated with risk of trans-shell microbial infection?

et al. 2014

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IntroductionAll bird eggs are exposed to microbes in the environment, which if transmitted to the developing embryo, could cause hatching failure. However, the risk of trans-shell infection varies with environmental conditions and is higher for eggs laid in wetter environments. This might relate to generally higher microbial abundances and diversity in more humid environments, including on the surface of eggshells, as well as the need for moisture to facilitate microbial penetration of the eggshell. To protect against microbial infection, the albumen of avian eggs contains antimicrobial proteins, including lysozyme and ovotransferrin. We tested whether lysozyme and ovotransferrin activities varied in eggs of larks (Alaudidae) living along an arid-mesic gradient of environmental aridity, which we used as a proxy for risk of trans-shell infection.ResultsContrary to expectations, lysozyme activity was highest in eggs from hotter, more arid locations, where we predicted the risk of trans-shell infection would be lower. Ovotransferrin concentrations did not vary with climatic factors. Temperature was a much better predictor of antimicrobial protein activity than precipitation, a result inconsistent with studies stressing the importance of moisture for trans-shell infection.ConclusionsOur study raises interesting questions about the links between temperature and lysozyme activity in eggs, but we find no support for the hypothesis that antimicrobial protein deposition is higher in eggs laid in wetter environments.

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“…This can be explained due to the characteristic composition of egg white, since albumen proteins, mainly lysozyme and ovotransferrin, are well known to play important antimicrobial roles. Specifically, Bedrani et al (2013) found that these both proteins exhibit antimicrobial activity against S. aureus. Furthermore, several additional minor proteins and peptides have also been reported as potential protectors against bacterial contamination (Bedrani et al, 2013;Baron et al, 2016).…”

Section: Effect Of Compositionmentioning

confidence: 99%

“…Specifically, Bedrani et al (2013) found that these both proteins exhibit antimicrobial activity against S. aureus. Furthermore, several additional minor proteins and peptides have also been reported as potential protectors against bacterial contamination (Bedrani et al, 2013;Baron et al, 2016). is observed, the CFU increased in three orders of magnitude in the case of yolk (from 3x10 5 to 10 8 CFU/mL), whereas in egg-medium the increment was only in two orders of magnitude (from 2x10 5 to 10 7 CFU/mL).…”

Section: Effect Of Compositionmentioning

confidence: 99%

Survival and development of Staphylococcus in egg products

Sánchez

Neira

Laca

et al. 2019

LWT

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In this work, Staphylococcus has been employed to simulate a contamination of different egg foodstuffs. Liquid (egg white, egg yolk and whole egg) and also solid (Spanish potato omelette) products have been employed as model foods. The effect of different parameters, i.e. oxygen availability, cooking temperature and storage temperature, on microorganism survival and development has been evaluated. In addition, the structure of solid foods has been analysed by means of rheological measurements. Results showed that Staphylococcus behaviour in liquid media was strongly influenced by the oxygen concentration, which is determinant for the specific growth rates (μ). In solid foods, the increase of cooking temperature to 100ºC reduced the microbial viability by one order of magnitude with respect to the raw foodstuff. Additionally, it was observed that the structure of the omelette, which depended on the cooking temperature, was a key parameter regarding the μ values. Therefore, to avoid the risk of food poisoning by Staphylococcus proliferation, in the case of egg products cooked only for few minutes, the cooking temperature should be higher than 100ºC and *Manuscript Click here to view linked References 2 the subsequent storage should be at refrigeration temperatures that increase the lag phase and decrease the growth rate.

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Systemic administration of lipopolysaccharide in laying hens stimulates antimicrobial properties of egg white against Staphylococcus aureus

Cited by 11 publications

References 20 publications

Immediate and transgenerational effects of thymol supplementation, inactivated Salmonella and chronic heat stress on representative immune variables of Japanese quail

Immediate and transgenerational effects of thymol supplementation, inactivated Salmonella and chronic heat stress on representative immune variables of Japanese quail

Are antimicrobial defences in bird eggs related to climatic conditions associated with risk of trans-shell microbial infection?

Survival and development of Staphylococcus in egg products

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