Editor’s note: This week, CNN Health's The Chart is taking a closer look at the most important health stories of 2010. Each day, they'll feature buzzwords and topics that came to the forefront over the past year.

According to an old adage, breakfast is the most important meal of the day. But for egg eaters across the United States, breakfast briefly became potentially deadly.

In August, an outbreak of salmonella poisoning spurred a recall of more than 500 million eggs from producers across the country, and was eventually traced back to two sources – Wright County Egg Co. of Galt, Iowa, and Hillandale Farms of New Hampton, Iowa. Inspection reports released by the Food and Drug Administration indicated that neither company adhered to its salmonella prevention plans.

Further FDA investigations revealed conditions termed "stomach-churning" by food safety advocates at The Center for Science in the Public Interest. They included chicken manure in piles up to 8 feet high at Wright County and liquid manure leaking into a chicken house at Hillandale.

Read 2010 Year in Review: Food safety at The Chart and see all egg recall information on Eatocracy

A Texas produce distributor has recalled nearly 7,000 cases of cilantro and curly parsley after samples in Quebec, Canada, and Michigan tested positive for salmonella, the company said Monday.

The latest recall comes days after dozens of people fell sick after consuming bacteria-tainted alfalfa sprouts in an apparently unrelated situation.

The "precautionary, voluntary recall" announced Monday pertains to cilantro and parsley from J&D Produce, Inc., packed between November 30 and December 6, the Edinburg, Texas-based company said in a statement. Cilantro and parsley processed and branded as Little Bear between those dates can be taken to retailers for a full refund.

Read the rest of "Salmonella found in U.S., Canada prompts cilantro, parsley recall" on CNN Health

Authorities have shut down a Texas food processing plant, saying it was contaminated by bacteria linked to the deaths of four people, state health officials said.

The Texas Department of State Health Services on Wednesday ordered Sangar Produce and Processing to immediately stop processing food and recall all products shipped from its San Antonio plant since January. This comes after state laboratory results showed Listeria monocytogenes, a bacteria that can cause severe illness, in chopped celery at the plant.

Four people died after contracting listeriosis after consuming celery that had been processed at the Sangar plant, said Carrie Williams, a department spokeswoman. State health authorities came to this determination while investigating 10 cases in which people with serious underlying health problems contracted listeriosis over an 8-month period.

CNN Health has the FULL STORY

Packages containing frozen vegetables sold by Wal-Mart nationwide and Kroger stores in the Southeast may contain glass fragments, the supplier said Friday in announcing a voluntary recall.

While there have been no reports of injuries, the Pictsweet Co. of Bells, Tennessee, is advising the public not to eat the recalled store-brand vegetables because of the potential for harm.

Consumers should return them to the place of purchase for a full refund, Pictsweet said.

CNN Health has the full list of voluntarily recalled items.