Naturally, salmonellae are appearing on eggs, mostly on the shell than inside the egg. These bacteria are natural residents of the intestines of poultry which are excreted with the faeces. In this way eggs can be contaminated very easily. Once the egg is broken these bad germs get into the inside of the egg and could cause serious health issues for human beings
The egg itself has several natural mechanisms to protect itself from bacterial colonization and multiplication. Nevertheless while processing eggs from chicken to packaging it is very important to fulfill hygiene regulations.