Tests suggest E. coli spread through air.
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The E. coli E. coli: see Escherichia coli.
in full Escherichia coli
Species of bacterium that inhabits the stomach and intestines. E. coli can be transmitted by water, milk, food, or flies and other insects. bacteria that sickened 82 people at this summer's Lane County Fair The Lane County Fair is an annual celebration held in Eugene, Oregon every August featuring food, music and other entertainment. It is held at the Lane County Fairgrounds. may have spread through the air inside the goat and sheep expo hall Expo Hall is an indoor arena located at the Florida State Fairgrounds in Tampa, Florida.
The arena was used by the National Hockey League's Tampa Bay Lightning during the team's first season in the league in 1992-1993. , the outbreak's lead investigator said Monday.
"It's quite possible some people were exposed through airborne transmission airborne transmission Epidemiology The transmission of pathogens by aerosol, which enter the body by the respiratory tract. See Aerosol. ," said Dr. William Keene William Keene (Birthname: William Joseph Keene d. August 4, 1915 in Pennsylvania - d. May 23, 1992 in Los Angeles, California) was an American television actor who appeared on several popular television shows more than one separate occasion as a different character. , an epidemiologist with Oregon Health Services health services Managed care The benefits covered under a health contract . "We don't know Don't know (DK, DKed)
"Don't know the trade." A Street expression used whenever one party lacks knowledge of a trade or receives conflicting instructions from the other party. if it was a few or almost all of them."
Keene suspects that E. coli was in the air based on samples of dust and grime he took inside the barn after the outbreak.
He took 25 swabs from the floor, fencing stacked along the walls and spots up high in the barn. Three samples tested positive for the virulent E. coli O157:H7 strain, and all three were 15 feet to 18 feet off the ground, he said.
One sample was taken from atop some pipes; one from some rolled-up netting; and one from a fan housing.
"It indicates it blew up there," he said. "There weren't any animals up there."
Once airborne, the bacteria could settle on railings, animal fur, on human skin or in food. It's also possible people swallowed contaminated contaminated,
v 1. made radioactive by the addition of small quantities of radioactive material.
2. made contaminated by adding infective or radiographic materials.
3. an infective surface or object. dust.
That means fairgoers wouldn't have had to touch an animal to get infected with E. coli, he said. It's likely some areas were more contaminated than others.
Last month's E. coli outbreak was the biggest in state history, and the latest in a series of E. coli outbreaks at county fairs and petting zoos around the country in the past three years.
Of the 74 confirmed and eight presumed cases here, nearly two-thirds involved children under 6 years old. Twelve children went to hospitals in Portland for treatment of hemolytic uremic syndrome hemolytic uremic syndrome
A syndrome in which hemolytic anemia and thrombocytopenia occur with acute renal failure, marked in children by sudden gastrointestinal bleeding, urine that contains red blood cells and is scanty in volume, and , or HUS, a potentially deadly complication of E. coli infection that can cause the kidneys to fail.
One child, 23-month-old Carson Walter of Eugene, spent a month at Doernbecher Children's Hospital Doernbecher Children's Hospital is a children's hospital located in Portland, Oregon, and associated with Oregon Health & Science University.
The first full-service children's hospital in the Pacific Northwest, Doernbecher provides full-spectrum pediatric care. before coming home on Friday.
If Keene's theory is correct, it marks the second time in a year that airborne E. coli has infected people at county fairs.
Last year, E. coli sickened 23 people at the Lorain County Fair in Ohio, and public health investigators traced the outbreak to an animal show barn where a teen dance was held.
Investigators swabbed the barn and found E. coli in the rafters, on the bleachers and walls and in sawdust on the floor. Investigators suspect that the E. coli bacteria became airborne in the dust, then landed in the food and drinks of fairgoers in the barn.
Investigating an infectious disease Infectious disease
A pathological condition spread among biological species. Infectious diseases, although varied in their effects, are always associated with viruses, bacteria, fungi, protozoa, multicellular parasites and aberrant proteins known as prions. outbreak has been compared to trying to assemble a jigsaw puzzle without knowing what the picture looks like. For Keene, being aware of the Ohio outbreak gave him a glimpse of the picture.
"If this were the first time (airborne transmission) was suggested, we'd be a little more cautious suggesting it was possible," he said. "You learn from what other people do."
Keene doesn't know what to tell county fair operators about how to protect people from airborne E. coli, but he'll consult with public health officials around the country to determine reasonable safeguards for fairs.
"We're just scratching our heads, trying to figure out what's both reasonable and reasonably effective," he said.
While hand washing This article or section contains .
The purpose of Wikipedia is to present facts, not to teach subject matter. remains the single most effective strategy for preventing the spread of disease, it appeared to be of little help in preventing the Lane County outbreak.
The percentage of sick people who washed their hands after leaving the animal barns - 31 percent - was only slightly lower than the percentage of healthy people who washed their hands - 36 percent.
The overall risk remains quite low at the fair, he said. Only 82 of the roughly 50,000 people who went through the small animal expo hall got sick, he said. "It's a low number," he said.
Still, finding E. coli lurking 15 feet off the ground inside the barn raises questions that have no clear answers. Keene hopes that the two suspected airborne outbreaks of E. coli will spur researchers to study the issue.
Among the questions:
How long had the E. coli been up in the rafters and pipes, and did it get there before the fair, during the fair, or after the fair?
Scientists know the bacteria can survive in the environment for weeks and even months, Keene said. It's less clear how long it presents a threat.
Warren Wong, the fair's managing director, said he didn't think the E. coli got up in the rafters during the fair. "I couldn't imagine manure drying so quickly it would get up in the dust," he said.
While cows, a common E. coli carrier, were in the building the month before the fair, Keene suspects the bacteria were blown up there during the fair.
"I lean pretty heavily on the fact that people did not get sick on the first two days of the fair," he said. "It's possible something happened (during the fair) to suddenly dislodge a bunch of grime on the pipes. It's much easier to imagine something started happening when the animals start pooping poop 1
1. An enclosed superstructure at the stern of a ship.
2. A poop deck.
tr.v. pooped, poop·ing, poops
1. To break over the stern of (a ship).
It's possible that a goat or sheep pellet could dry out in the heat and get ground up when people and animals walked on it, then get kicked up with dust into the air, Keene said.
"None of the people I talked to thought it was terribly dusty in there," he said. "That's a little unsatisfying."
Fans circulating air in the barn could have spread the bug. In addition to permanent exhaust fans at the roof's edge, some exhibitors brought their own fans, which they placed in the pens to cool their animals, said Rich Diamond, the fair's operations manager See datacenter manager. .
Wong said fair crews hosed down the inside of the barn after this year's fair, though they can't shoot water inside the heating unit or onto light fixtures.
Wong said he's looking into ways to sanitize To remove sensitive data from an information system, a database or an extract from a database. See sensitive. the inside of the building, either with steam or a chlorine solution.
The expo hall should be safe now for other activities, Keene said. Any bacteria that were in the air would fall to the ground quickly, he said.
"I believe that finding the organism in the building does not necessarily translate to any significant risk to people going in there now," he said. "Stuff that blows around and sits in rafters doesn't necessarily come down and bite people."
OTHER CASES OF E. COLI
CORRECTION (ran 9/25/02): A list Tuesday of E. coli outbreaks at county fairs and petting zoos in recent years was based on a Register-Guard review of news accounts and public health reports. The story incorrectly attributed the information solely to the federal Centers for Disease Control and Prevention Centers for Disease Control and Prevention (CDC), agency of the U.S. Public Health Service since 1973, with headquarters in Atlanta; it was established in 1946 as the Communicable Disease Center. .
Since 1999, at least eight E. coli outbreaks have occurred at county fairs and dairy farms where visitors had contact with animals.
August 1999: Washington County Washington County is the name of 30 counties and one parish in the United States of America, all named for George Washington. It is the most common county name in the United States. Fair, N.Y.: Public health officials confirmed 127 cases of E. coli O157:H7 and 45 cases of campylobacteriosis, another bacterial disease A bacterial disease is an abnormal condition of an organism (disease) caused by bacteria, a type of unicellular microorganisms. Not all bacteria cause disease, and not all diseases are caused by bacteria, or even microorganisms. that causes diarrhea; about 800 people reported symptoms. Seventy-one people were hospitalized, 14 developed hemolytic uremic syndrome, or HUS. Two people died: a 3-year-old girl and a 79-year-old woman. The outbreak was traced to a well contaminated by a dormitory septic system and possibly by manure runoff from a cattle barn.
May-June 2000: Snohomish County, Wash., dairy farm: Five schoolchildren schoolchildren school npl → écoliers mpl;
(at secondary school) → collégiens mpl; lycéens mpl
schoolchildren school developed E. coli after touching farm animals on a field trip. Three were hospitalized; one developed HUS. This was the first reported case in the United States United States, officially United States of America, republic (2005 est. pop. 295,734,000), 3,539,227 sq mi (9,166,598 sq km), North America. The United States is the world's third largest country in population and the fourth largest country in area. of direct transmission of E. coli from animals to humans.
July-August 2000: Medina County Medina County is the name of several counties in the United States:
September-November 2000: Montgomery County, Pa., dairy farm: 51 cases of E. coli were reported, 15 confirmed, among people who attended a dairy farm with a petting zoo; 16 were hospitalized and eight developed HUS.
August 2001: Lorain County Fair, Ohio: 88 fairgoers reported E. coli symptoms, and 23 cases were confirmed. The Cow Palace, a show barn where animals were judged and a teen dance was held, was the suspected source.
August 2001: Ozaukee County Fair, Wis.: 200 fairgoers reported symptoms, and 25 E. coli cases were confirmed. Suspected source: Cattle barns and petting zoos.
September 2001: Wyandot County Fair, Ohio: 37 confirmed cases, 88 reported symptoms, three developed HUS. Suspected source: Contact with contaminated calves and cows.
August 2002: Lane County Fair: 74 confirmed cases and eight presumed cases were documented by public health officials. Twelve children have been hospitalized for treatment of HUS. Investigators traced the outbreak to the sheep and goat expo hall.
- The Register-Guard, Centers for Disease Control and Prevention
INSIDE At least eight outbreaks of E. coli have occurred at county fairs and dairy farms since 1999 / 7A Fans circulating air in the barn could have spread the bug. In addition to permanent exhaust fans at the roof's edge, some exhibitors brought their own fans, which they placed in the pens to cool their animals.