Navigation Links
Study Reveals E.Coli's Grip on Gut
Date:10/18/2007

Finding might aid illness prevention, treatment, researchers say

THURSDAY, Oct. 18 (HealthDay News) -- U.S. scientists have discovered how a potentially deadly form of E. coli bacteria adheres to and colonizes the gut.

Enterohemorrhagic Escherichia coli O157:H7A, or E. coli, is a common cause of food poisoning.

The authors of the study hope the breakthrough will one day help with disease prevention strategies. But others say breakthroughs like that are still far off.

"The study was conducted in vitro, not in an animal model, human or otherwise," noted Dr. Pascal James Imperato, distinguished service professor and chair of the department of preventive medicine and community health at the State University of New York Downstate Medical Center in New York City. "Whether this in vitro result is reflective of what happens in vivo [in the gut] remains to be demonstrated."

There are several strains of E. coli and one in particular, E. Coli 0157:H7, can be deadly.

Human infections most often result from eating uncooked ground beef, because cattle carry the pathogen in their intestines without getting sick. E. coli can also be acquired from consuming contaminated dairy products, vegetables, unpasteurized juice, through person-to-person contact and through either swimming in or drinking water contaminated with sewage.

Infection with E. coli 0157:H7 can result in abdominal cramps and bloody diarrhea and, less commonly, a condition called hemolytic uremic syndrome (HUS), which is characterized by anemia and kidney failure and can end in death.

The U.S. Centers for Disease Control and Prevention estimate that 73,000 infections and 61 deaths are attributable to E. coli 0157:H7 each year. The very young and the very old are particularly prone to developing life-threatening HUS.

For this study, the researchers at the University of Arizona, Tucson, found that several proteins bind together to form a structure known as an adhesive type IV pilus, that they call hemorrhagic coli pilus (HCP). This HCP bundle allows the bacteria to attach to human intestinal epithelial cells, the researchers said.

The authors also found that individuals with HUS had an immune response to one component of HCP.

The research group is now looking to start experiments in animals and/or humans. "In our lab, we did in vitro experiments, but we are trying some collaboration with other universities to do some in vivo [in animals/humans] experiments," said Partha Samadder, a postdoctoral fellow in the lab of Jorge A. Giron, the study's lead author.

"Overall, it all has to be corroborated by others," Imperato said. "All that said, meaningful therapeutic interventions to prevent this cascade of molecular biological events will be years off. Meanwhile, the key is to prevent these infections in the first place."

There are ways to help prevent foodborne illness. They include:

  • Make sure ground beef and other meats as well as eggs are well cooked before you eat them.
  • Wash raw fruits and vegetables with soap. Pay particular attention to leafy greens as there are lots of crevasses and cracks where E. coli can hide.
  • Don't chop vegetables on the same block where you just made beef hamburgers or prepared other meat. Keep raw meat separate from ready-to-eat foods.
  • Keep raw and ready-to-eat foods completely separate.
  • Refrigerate leftovers promptly.
  • Avoid bruised produce such as tomatoes.
  • Make sure all cooking utensils including meat thermometers and cutting boards are thoroughly cleaned with soap and hot water after you've handled them.
  • Wash your hands regularly with soap and hot water.
  • Drink only pasteurized milk, juice or cider.
  • Drink municipal water that has been treated with chlorine or another disinfectant.

More information

There's more on E. coli at the U.S. Centers for Disease Control and Prevention.



SOURCES: Partha Samadder, Ph.D., postdoctoral fellow, department of immunobiology, University of Arizona, Tucson; Pascal James Imperato, M.D., distinguished service professor and chair, department of preventive medicine and community health, State University of New York Downstate Medical Center, New York City; Journal of Clinical Investigation


'/>"/>
Copyright©2007 ScoutNews,LLC.
All rights reserved

Related medicine news :

1. Rural Canadians travel far for specialists: study
2. A new study surpasses Gene Therapy Hurdle
3. Tomato Sauce reduces Cancer Risk- Study
4. A question on study of Adult Stem Cell
5. Study on obesity and heart failure
6. National Lung Study in the process
7. Marijuana gateway theory strengthened by study of twins
8. Old theory of adaptation confirmed by new study
9. Study casts doubt on keyboard ills
10. Gene study links endometriosis, infertility
11. Study reveals how stress can make you sick
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/26/2016)... ... June 26, 2016 , ... Pixel Film Studios Released ProSlice Levels, a ... can give their videos a whole new perspective by using the title layers ... Film Studios. , ProSlice Levels contains over 30 Different presets to choose from. ...
(Date:6/26/2016)... ... June 26, 2016 , ... ... have been diagnosed with endometriosis. These women need a treatment plan to not ... comprehensive approach that can help for preservation of fertility and ultimately achieving a ...
(Date:6/25/2016)... (PRWEB) , ... June 25, 2016 , ... The temporary closing of Bruton Memorial Library ... City Observer , brings up a new, often overlooked aspect of head lice: the parasite’s ... for fumigation is not a common occurrence, but a necessary one in the event that ...
(Date:6/25/2016)... ... June 25, 2016 , ... As a lifelong Southern Californian, Dr. ... his M.D from the David Geffen School of Medicine at UCLA. He trained in ... to complete his fellowship in hematology/oncology at the UCLA-Olive View-Cedars Sinai program where he ...
(Date:6/25/2016)... Montreal, Canada (PRWEB) , ... June 25, 2016 , ... ... the pursuit of success. In terms of the latter, setting the bar too high ... low, risk more than just slow progress toward their goal. , Research from ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... 2016 Research and Markets has announced ... report to their offering. ... a favourable commercial environment for MedImmune to enter. The US ... will serve to drive considerable growth for effective anti-influenza medications. ... cap sales considerably, but development is still in its infancy. ...
(Date:6/23/2016)... MOUNTAIN VIEW, Calif. , June 23, 2016 ... 9:00 a.m. CST on Thursday, July 7, 2016 , , ... kayla.belcher@frost.com ) , , , , EXPERT PANELISTS:  ... Sciences, Nitin Naik; Senior Industry Analyst, Christi Bird; Senior Industry Analyst, ... The global pharmaceutical industry is witnessing ...
(Date:6/23/2016)... , June 23, 2016  Astellas today announced the establishment of Astellas Farma Colombia (AFC), a new affiliate ... in Latin America . ... ... ... ...
Breaking Medicine Technology: