Egg recall in US goes up to half a billion

Half a billion eggs in the US have been recalled in an investigation into a salmonella outbreak, which now includes two farms in the state of Iowa.
Iowa's Hillandale Farms announced it was recalling 170 million eggs after tests confirmed salmonella.
The news follows a recall of 380 million eggs by another Iowa farm earlier this week.
A spokeswoman for the Food and Drug Administration (FDA) said the two cases are linked.
Regulators said salmonella cases have increased threefold since May.
About 2,000 salmonella cases were reported between May and July, roughly 1,300 more than usual, the Centers for Disease Control said.