Escherichia Coli Essay

2. Why do you think Mrs. Garner's students did not become ill, while Ms. Hines' kids did?

Esherichia coli also known as E. coli is a bacterium that lives in your gut. (1). it was founded by Theodore von Esherich in 1888. There are many people that can get the bacteria. Also there are thousands of strands of E.coli. Six E. coli O157 outbreaks were identified during 2007. Four of the outbreaks involved foodborne transmission. (Eshericha Coli). Six Minnesota cases and one Wisconsin case with the same or closely-related PFGE subtype of E. coli O157:H7, and an additional Minnesota case of Shiga-toxin producing E. coli that was not culture-confirmed, attended the Minnesota State Fair in August. All but one of the cases showed cattle or visited the cattle

There are three types of environments in which cells are located which include isotonic, hypotonic and hypertonic. In an isotonic environment, the amount of water and solute are the same both inside and outside of the cell. As water drifts into the a cell, the same amount flows out creating a balanced environment both inside and outside of the cell. When there is a high level of water on the outside of the cell and a high amount of solute inside the cell, water will be drawn inside of the cell creating a hypotonic solution. The increase in water inside the cell causes the cell to become engorged and erupt. In a

AIM – The aim of the experiment is to determine the relative effectiveness of several anti-microbial substances on developing pathogens. (E. coli)

Escherichia Coli, located in one of the main organs known as the large intestine, is a type of bacteria that helps digestion. (Trzepacz, Timmons, and Duobinis-Gray, 2016) For Escherichia Coli to remain stable and alive, it needs specific necessities. These needs are known as the following: Energy, vitamins, and similar compounds. Escherichia Coli is found everywhere!

E.coli outbreaks have steadily grown over the last few decades. An expansion in big farming has led to E. coli not only being found in meat, but vegetation as well, due to waste runoff. This has increased our need for adequate antibiotics that can fight bacteria, like E. coli. The best way to pinpoint which antibiotics work is by measuring their ability to create antimicrobial agents or zones of inhibition. When a paper disc that has been saturated in an antibiotic is inserted in a solution of E.coli and medium, the zone of inhibition will be noted as the clear ring that forms around the disk. The antibiotics efficacy is then determined by measuring each disk zone of inhibition, and comparing these measurements to the zone measurements of an untreated specimen. If an antibiotic is to be deemed sufficient for treating E. coli it should show a zone of inhibition that is at least double the size of the untreated specimen.

Microorganisms such as bacteria, fungus, mold, and yeast are present and common in almost every environment on earth. The normally microscopic organisms can easily be seen using differing types of agar, which creates an ideal environment for the organisms to form colonies, which are groups of hundreds of organisms that can be seen with the naked eye. In order to see individual microorganisms, it is necessary to use the magnification of a high-powered microscope.

E. coli is a bacterium capable of being transmitted from one person to another. To ensure that the bacteria used in this experiment were not transmitted to other places, items, or organisms, several safety protocols were followed.

2. List what it is caused by (specific scientific and common names of the organism: Escherichia coli

Escherichia coli, is a gram negative, rod-shaped bacterium that can be found in the digestive tracts of humans and animals, it is an important beneficial bacteria for many organisms, it inhibits the growth of pathogenic species such as Salmonella and aids in digestion. The strains are distinguished from the presence of two surface

The most commonly identified STEC infections in North America are E.coli O157:H7. The diagnosis of E. coli O157: H7 infection needs to be considered for all patients who present with diarrhea, especially bloody diarrhea or Hemolytic Uremic Syndrome which is a type of kidney failure. Hemolytic Uremic Syndrome can begin as the diarrhea is improving. It can occur in people of any age but is most common in children under 5 years old and the elderly. Stool specimens should be collected. Specimens should be collected as close to the time of onset of diarrhea as possible; however, specimens taken even weeks after the onset of symptoms are sometimes positive. Antibiotic treatment decreases the chance of recovery of E. coli O157: H7 therefore, when follow- up specimens are being obtained, the patient should have received no antibiotic for a minimum of 48 hours before

Background – Microscopic, single celled organisms known as bacteria can be found everywhere. They can be beneficial but they can also be dangerous, such as when they cause infection, which can lead to diseases. Escherichia coli is a germ, or a bacterium, that lives in the digestive paths

wrong hands a car can be a deadly weapon but for most of us it is

After incubating of the two replicate strains of E. coli each in the 0%, 0.1%, 0.25% and 0.5% garlic extract dilutions, the optical densities of E. coli were taken at an absorbance reading of 600 nm in a spectrophotometer over a growth timespan of 25 hours. The exponential growth curves as seen in Figure 2A were measured from the timepoint of the hour 2 to hour 6, the growth phase, which was where majority of the growth grew in an upward slope, and then the growth curves had slowed into the stationary phase around the seventh to eighth hour where the growth curves were becoming more constant all the way to the 25th hour timepoint as seen in Figure 1A.

In all areas of biology, it is easy to see that structure is related to function. This statement holds true in microbiology as well, the study of microorganisms, including bacteria. One characterizing feature of bacteria is the cell wall, which can generally (although not in all situations) be categorized into one of two categories: either Gram positive or Gram negative. Gram positive bacteria’s cell walls are composed of a large peptidoglycan layer (up to 90% of their cell wall). Within this large peptidoglycan layer, one can find techoic acids, which contribute to the maintenance of cell wall structure, and lipotechoic acids, which attach to membrane lipids. Gram positive bacteria that act as pathogens can also potentially release exotoxins, which can have very dangerous effects on humans. Gram negative bacteria, on the other hand, have a very small layer of peptidoglycan in their cell wall, which is surrounded by an outer membrane. Within the outer membrane, one can find the lipopolysaccharide layer, which is one of the most distinguishing factors of Gram-negative bacteria. It is important to note that Gram negative bacteria fail to possess techoic