Creed said that independent laboratory tests confirmed all other ingredients on the Taco Bell menu were safe and that there were no plans to use green onions again.
While the source of the infected vegetables hasn't been pinpointed, investigators are looking into the possibility of it may have been from fields in southern California, near where an E. coli outbreak involving fresh spinach occurred earlier in the fall.
Unlike the spinach infestation, there have been no deaths in the 61 cases in New York, New Jersey, Pennsylvania and Delaware, although 49 people have been hospitalized. According to the U.S. Centers for Disease Control and Prevention, seven patients suffered kidney failure.
The CDC describes E. coli symptoms to include bloody diarrhea, abdominal cramps and/or vomiting.
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Insulin Successful in Treating Skin Wounds
Insulin, the hormone most closely associated with diabetes and regulating blood sugar levels, may have another medicinal use.
Reporting at this week's annual meeting of The American Society for Cell Biology in San Diego, researchers from the University of California at Riverside say they have found that applying insulin directly onto skin wounds "significantly enhanced the healing process."
Laboratory rats treated with insulin healed much faster than conventional treatments, the scientists reported in a society news release, with blood vessels being rebuilt more rapidly.
The scientists, led by researcher Manuela Martins-Green, also used human skin cells in laboratory cultures to confirm their findings. They found that insulin works by "switching on cellular signaling proteins called kinases and a protein that binds elements in DNA that regulate the production of cholesterol and its relatives."
The next step is to find which specific cells respond to insulin, Martins-Green says in the news release. "We may be able to develop ways in which we can make insulin work even better or find ways in which more affordable molecules that mimic these functions of insulin can be developed to treat people who suffer from poor healing."
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'Laser Surgery' Cost Greatly Reduced By Using High-Heat Lamps, Researchers Say
Israeli researchers say they've found a way to use laser surgery techniques to operate on malignant tumors at a fraction of the cost.
BBC News reports that instead of using an expensive laser beam, researchers at Ben Gurion University in Beersheva have found that lamps that generate a lot of heat -- such as those used in movie projectors -- can be used with fiber optics to burn out cancerous tumors. Because the cost is so much cheaper, lead researcher Jeffrey Gordon said, this technique could be used by medical facilities throughout the world that couldn't afford the more highly-developed laser technology.
"We used a new generation of ultra-bright lamp - brighter than car headlamps - which can be harnessed if you develop the proper optic to harness it," the BBC quotes Gordon as saying. "We performed surgery on livers and kidneys of rats and the results were at least as good as the corresponding results one reads about in laser surgery. But our technique is 100 times cheaper."
The technique needs to be refined, the scientists said, by developing methods to make the surgery more infinitely precise, but the basic method is sound, they maintain.
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Nations Pledge $475 Million Against Bird Flu
The world's nations have pledged an additional $475 million to fight bird flu, United Nations officials said in concluding a three-day avian flu conference in the African country of Mali.
The United States topped the list with a pledge of $100 million, followed by Canada ($92.5 million), the European Union ($88.2 million), and Japan ($67 million), the Agence France Presse news service reported.
At the last similar world meeting in January in Beijing, donors pledged $1 billion in loans and donations toward fighting bird flu. Experts have long feared that the current H5N1 strain could mutate from a deadly form that affects mostly birds to one that is more easily transmitted between people, sparking a human pandemic.
H5N1, primarily spread so far to people by contact with sick birds, has killed more than 150 people worldwide since late 2003, AFP said. The virus also has led to mass culls of tens of millions of domestic poultry.
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Chewable Birth Control Pill Launched in U.S.
The first chewable birth control tablet in the United States was officially launched Thursday by drug maker Warner Chilcott.
The company says that Femcon Fe provides an option for women who don't like swallowing pills and want to carry their birth control with them. The chewable tablet, which is aimed at women who occasionally forget to take their pills, contains the same hormones as standard oral contraceptives, the Associated Press reported.
Femcon Fe is packaged in the typical 28-day cycle -- 21 days of active pills and seven days of inactive pills. Women must drink 8 ounces of water when taking a tablet. A month's supply will sell for $44 wholesale. The price will be slightly more at pharmacies.
The spearmint-flavored tablet can also be swallowed without chewing.
"This isn't a great leap forward, but I think this is a helpful step," Dr. Lee Shulman, chairman of the Association of Reproductive Health Professionals, told the AP.
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Ebola Could Push Gorillas to Extinction
A strain of Ebola virus has killed about 5,500 gorillas in the Republic of Congo and Gabon since 2001. The virus, combined with hunting, may be enough to cause extinction of the great apes, says a study in the current issue of the journal Science.
European researchers looking into reports of large-scale gorilla deaths conducted an investigation at the Lossi Sanctuary in the Congo. Between 2002 and 2003, 93 percent of the gorillas in the sanctuary died, CBC News reported.
Tests on the remains of dead gorillas were positive for Ebola Zaire, one of the four strains of the virus. Chimpanzees in the region were also severely affected, with a 77 percent death rate due to Ebola.
"Ape species that were abundant and widely distributed a decade ago are rapidly being reduced to remnant populations," the researchers wrote. "Add commercial hunting to the mix, and we have a recipe for ecological disaster."
In humans, Ebola causes massive internal and external bleeding and kills about 90 percent of people who are infected with the virus. Since it was first recorded in 1976, Ebola has killed more than 1,200 people, CBC News reported. |
