An effort to keep food safe for consumers has received a boost from regulators in Washington, D.C., as the Obama administration issued new rules for eggs, poultry, beef and some fruits and vegetables.

New measures include requirements to refrigerate eggs during transport and more stringently inspect poultry houses to prevent the spread of salmonella. It also includes efforts intended to keep E. coli out of beef and prevent bacteria from entering fruits and leafy greens.

The changes come four months after President Obama laid out plans to improve food safety after concerns about tainted peanut butter and tomatoes, which were quickly followed by problems with pistachios.