Last week, some 300 staff and students in San Francisco were sickened with norovirus believed to have been transmitted by someone barfing on a door handle.

It now appears a similar mode of transmission sickened 229 cheerleaders and cheeries at a Washington state competition.

JoNel Aleccia of msnbc cites Suzanne Pate, spokeswoman for the Snohomish Health District, as confirming Friday that norovirus was the cause, and the outbreak was likely precipitated by people who were ill in public.

"Somebody arrived at the event sick," said Pate, noting that janitorial crews were called to clean up vomit in a restroom and on an adjacent walkway. Those areas were likely exposure sites for the cheer and dance teams, she said.

Some 229 people were sickened and least 33 people sought medical attention for their illnesses, state health officials said late Friday. That number is expected to grow as the investigation continues.

A Comcast Arena spokeswoman said officials had sanitized the premises in accordance with federal health guidelines before a new event scheduled for Friday night. Tests of the arena's water supply showed no problems, Pate said.

"It's probably the best-scrubbed place in the county," she added.

At least three people are sick with shiga-toxin producing E. coli in Washington state, and whole and skim raw milk and cream from Cozy Vale Creamery in Tenino with sell-by dates of Dec. 6 or earlier is being recalled.

The recall was initiated after Washington State Department of Agriculture environmental swabbing at the facility discovered that locations in the milking parlor and processing areas were contaminated with toxin-producing E. coli.

County health inspectors closed Marinepolis Sushi Land in downtown Bellevue, Washington, at 4 p.m. Thursday after two separate patients with salmonella were connected to the restaurant, according to Seattle and King County Public Health.

The two people who fell ill were not hospitalized and have recovered from their illnesses, said James Apa, spokesman of Seattle and King County Public Health.

Marinepolis manager Keith Negley told the Bellevue Patch the restaurant, a conveyor belt style sushi restaurant, is cooperating with the investigation fully, and could be reopen as soon as Friday.

"We're doing everything we can to assist, even if it's a potential that it could have been through here," he said.

The Snohomish Health District confirms four suspected cases of E. coli found in people who visited the Animal Petting Farm at Forest Park in Everett, Wash.

Two adults and two children reported symptoms after visiting the farm on opening day June 4th. One of the children was hospitalized for three days but is now recovering.

It is believed that the suspected E. coli poisoning originated with the animals who naturally carry bacteria. The Health district believes the infected people did not properly wash their hands.

The city bleached the entire farm and enhanced fences around the animal cages to further limit contact between children and animals. No animals are in quarantine.

Proper handwashing requires access to proper tools. Were sinks with running water, soap and paper towels available near the animals, as is now being recommended, or was it just some sort of wipe that was available.

An updated table of international petting zoo outbreaks is available at http://bites.ksu.edu/petting-zoos-outbreaks