When we look in a very good microscope and we see this bacterium
we see trouble!
This is E.coli a bacterium that can produce toxins in the human intestinal tract resulting in a bloody diarrhea.
Over the last few decades ten thousands of humans got seriously infected by this bacterium!
You will feel it:|
Low fever, nausea, vomiting,
stomach cramps, and bloody diarrhea.
Not very nice symptoms, often causing complications in children and the elderly:
renal failure, anemia, and dehydration especially for children,
the very dangerous HUS or Hemolytic-uremic syndrome that can cause kidney failure,
spontaneous bleeding, organ failures, and mental changes in the elderly (termed TTP or thrombotic thrombocytopenic purpura). Some of these patients develop disabilities or die.
Doctors can diagnose E. coli in the patient's stool.
Healthy humans with a strong immune system can handle this infections without treatment; but supportive treatment is necessary if the patient becomes dehydrated, anemic, or develops HUS or TTP.
Every blue dot you can see here is an|
E. coli bacterium growing in this Petri dish.
E. coli can kill humans!
BSB does regular water testing, looking
how many E.coli are living in our river.
Leaking septic tanks, feces from animals, as cows, deer, birds
all that contaminates our creeks, rivers and lakes.
Preventing an infection is possible!|
Well cooked foods have no living E.coli bacteria.
Treated or pasteurized fluids normally contain no E.coli.
Wash your hands after touching things, that could be contaminated with any animal or human waste.
Some people do not wash their hand after the toilet.
The last big outbreak, killing over 40 people, was caused by sprouts, containing living E.coli.
In the moment, there is no E. coli vaccine available for humans.
What is E. coli?|
The Escherichia coli bacteria can survive without air. Depending on the environment, it may produce thin hair-like structures (flagella or pili) that allow the bacteria to move and to attach to human cells. These bacteria commonly live in the intestines of people and animals worldwide. There are over 700 strains of E. coli. Most of the E. coli are normal inhabitants of the small intestine and colon and do not cause disease in the intestines. But, these non-pathogenic E. coli can cause disease if they spread outside of the intestines, for example, into the urinary tract where they cause bladder or kidney infections, or into the blood stream (sepsis).
Other E. coli strains (enterovirulent E. coli strains or EEC) cause "poisoning" or diarrhea even though they usually remain within the intestine by producing toxins or intestinal inflammation.
Researchers name six groups of E. coli strains that comprise EEC.
EHEC (enterohemorrhagic E. coli)
ETEC (enterotoxigenic E. coli)
EPEC (enteropathogenic E. coli)
EIEC (enteroinvasive E. coli
EAEC (enteroadherent E. coli
EAggEC (enteroaggregative E. coli)
E. coli has over 700 serotypes, identified by small antigenic changes in their surface "O" antigens (lipopolysaccharides or molecules on the bacterial surface of gram-negative bacteria), for example E. coli 0157 or E. coli 055. These serotypes are identified by immunological tests. E coli strains are further distinguished by "H" protein antigens (different types of flagella that make the bacteria motile). Consequently, a particular E. coli strain can be identified as H, followed by a number, and this identifier is added to the "O" name; for example, E. coli 0157:H7. Although this name designation seems complicated, researchers and clinicians use these antigenic identifiers to track specific E. coli strains that cause outbreaks of disease.
E.coli exist in our rivers!|
Sorry to report: When we test creeks and rivers we often find E.coli!
After reading the information above you know
Why do we test water for e coli?
Some types of e coli can cause serious food poisoning in humans.
We know E.coli gets in the water by fecal contamination, from humans or mammals as cows, piglets, calves, lams, chicken or birds.
One particular E. coli strain, E. coli 0157:H7 is notorious for its potential to cause disease in man.|
E coli O157:H7 is a serotype of E. coli bacteria that form the predominant members of one group of EEC. This EEC group is termed enterohemorrhagic E. coli or EHEC.
Unfortunately, other terms in the medical literature describe this group (VTEC or Vero toxin-producing E. coli and STEC or Shiga toxin-producing E. coli). Research suggests that only a small number of E. coli 0157:H7 are needed to cause infection (ingestion of about 10–100 organisms) instead of the thousands to millions needed for infections by other E. coli serotypes. Infection is aided by adhesive receptors (pili or fimbriae) that attach the bacteria to human intestinal cells. The most problems caused by the bacteria are due to two Shiga toxins, termed Stx 1 and Stx 2 and also termed Vero toxins. (Toxins are chemicals that are produced by the bacteria and that damage human cell.) These toxins are almost identical to toxins produced by another related bacterium, Shigella spp that can damage and kill intestinal cells and occasionally cause anemia, damage to platelets, and death of cells in other organs, especially the kidneys.|
E. coli 0157:H7 is a major health problem. It is estimated to cause infection in more than 70,000 individuals a year in the United States, and the U. S. Centers for Disease Control and Prevention (CDC) suggests E. coli 0157:H7 is responsible for the majority of "E. coli" outbreaks in the U. S. It has been reported to cause both large outbreaks as well as outbreaks in small numbers of individuals.
This diarrheal illness was first recognized when the CDC personnel isolated E. coli O157:H7 from patients in two separate outbreaks in Oregon and Michigan. The illnesses were associated with eating hamburgers at the restaurants of a national chain; some patients experienced hemorrhagic colitis (inflammation and bleeding of the colon). Thus, hemorrhagic colitis due to E. coli 0157:H7 is commonly referred to as hamburger disease. Since that time, E. coli 0157:H7 also has been associated with contaminated water, foods, and unpasteurized or incorrectly pasteurized (heat treated) dairy products.
Outbreaks have occurred in all US-States and
E-coli lives all around Earth!
In some rivers and ponds is an extraordinary growth of algae - Why?|
The word Eutrophication is describing the overfertilization of lakes, rivers, ponds.
Negative environmental effects are anoxia, what means loss of oxygen.
Fish and other waterlife will die.
The reason is mostly untreated sewage effluent, agricultural run-off with fertilizers.
Why do we need to protect Nature?|
You can find many of ponds with dirty water, old gasoline containers, plastic bags, and trash.
Often you get a bad smell from far away!
Do you like our pond?
Wouldn't it be nice to have
more healthy lakes where
we can swim, fish, paddle?
On the banks we can relax,
play, watch the birds,
discover aquatic plants,
enjoy nature and have a
good time with family and friends..
That's why we need your help to protect Nature!
BSB Nature Conservation protects plants, animals + humans!!
Work with BSB! Protect our precious water.
- - -
- - -
- - -
|Fair Use Notice|
All material on 1000+ BSB web-pages is intended to advance understanding of the environmental, social, scientific, and economic issues of Nature conservation. We believe this constitutes a "fair use" of any copyrighted material as provided for in section 107 of the U.S. Copyright Law. In accordance with Title 17 U.S.C. Section 107, the material on this site is distributed without profit to those who have expressed an interest in receiving the included information for research and educational purposes. If you wish to use copyrighted material from our websites for purposes of your own that go beyond "fair use," you must obtain permission from the copyright owner. If you are the owner of copyrighted material(s) appearing on this site, and wish it to be removed, please contact us directly.