Influence of egg shell translucency on egg shell penetration by bacteria

Egg shell translucency, which can be due to changes in the mammillary cores and mamillary layer during the early phases of eggshell formation, has the potential to increase the incidence of microcracks in egg shells, and hence, may facilitate bacterial penetration. There was a significant correlation between egg shell translucency and egg shell penetration by 'Salmonella' Infantis. 'Salmonella' Infantis was able to penetrate translucent egg shells even at very low doses. The penetration, however, appeared to be hindered in both translucent and non-translucent eggs at 4°C, as compared with room temperature which highlights the importance of storage of eggs at refrigeration temperatures.