Nobody downloaded yet

Helicobacter pylori (Microbiology CS3) - Case Study Example

Comments (0) Cite this document
Summary
Helicobacter pylori, a gram-negative, spiral shaped, flagellated, microaerophilic bacterium is found in the lining of the stomach and the duodenum (Mobley, Mendz and Hazell, 2001; Helicobacter Foundation, 2006). It has been widely studied for its ability to survive in the harsh,…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER91.9% of users find it useful
Helicobacter pylori (Microbiology CS3)
Read TextPreview

Extract of sample
"Helicobacter pylori (Microbiology CS3)"

Download file to see previous pages It is also believed to be the etiologic agent for peptic ulcers, gastritis and other gastric disorders (Mobley, Mendz and Hazell, 2001).
H. pylori produces several key enzymes that enable it to survive in the host. The enzyme, urease, catalyses the breakdown of urea, which is abundantly available in the stomach, into ammonia and bicarbonate (Helicobacter Foundation, 2006). The resulting ammonia surrounds the bacteria, proving a basic (low pH) environment that protects the bacteria from stomach acid. Another enzyme, superoxide dismutase, protects the bacteria from being killed by macrophages and polymorhonuclear leukocytes by breaking down the dismutase produced by them (Mobley, Mendz and Hazell, 2001). Catalase protects the bacteria from hydrogen peroxide produced by phagocytes (Mobley, Mendz and Hazell).
According to the Centers for Disease Control and Prevention, H. pylori infection afflicts almost two-thirds of the entire population of the world (CDC, 2005). Developing countries have a higher incidence of H. pylori infection than developed countries (Mobley, Mendz and Hazell, 2001).
The infection is more prevalent among lower socio-economic groups and in older adults (CDC, 2005). In the US, Hispanics and African Americans are found to be the most affected (CDC, 2005). The rate of acquisition of the infection differs greatly, both within and across countries (Mobley, Mendz and Hazell, 2001).
The bacteria first adhere to the mucin in the epithelial cells of the gastric mucosa (Mobley, Mendz and Hazell, 2001). By altering the rheological properties of the mucus gel, the bacteria coats the lining of the stomach wall (Celli et al. 2009). It then generates a cloud of ammonia around itself to achieve low pH for protection from stomach acid. The ammonia is produced by the hydrolysis of urea. The bacteria also produces phospholipase A that degrades cell membranes by breaking down phospholipids (Mobley, ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
  • CHICAGO
(“Helicobacter pylori (Microbiology CS3) Case Study”, n.d.)
Retrieved from https://studentshare.org/miscellaneous/1596742-helicobacter-pylori-microbiology-cs3
(Helicobacter Pylori (Microbiology CS3) Case Study)
https://studentshare.org/miscellaneous/1596742-helicobacter-pylori-microbiology-cs3.
“Helicobacter Pylori (Microbiology CS3) Case Study”, n.d. https://studentshare.org/miscellaneous/1596742-helicobacter-pylori-microbiology-cs3.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document
CHECK THESE SAMPLES - THEY ALSO FIT YOUR TOPIC
Microbiology
...?Microbiology Essay In 1835 Bassi showed that a fungus caused silkworm disease, and in 1865 Pasteur discovered that a protozoan caused another silkworm disease. Why do we use Koch’s postulates instead of “Bassi’s” or “Pasteur’s” postulates? Bassi and Pasteur both worked on silkworm diseases. Bassi in the year 1835, established that a microscopic organism, a fungus, caused disease in the silk worm. Around 30 years later, in the year 1865, Pasteur established that another microbe, a protozoan, cause infection in silkworms. These findings established an association between the “questioning” microbes and disease. Indicating that disease is caused due to the attack by tiny micro-organisms. This formed the basis for further...
2 Pages(500 words)Essay
Microbiology
...?Microbiology Compare and contrast photophosphorylation and oxidative phosphorylation. Both photophosphorylation and oxidative phosphorylation result in production of ATP. Photophosphorylation is a process by which ATP is produced using energy of the sunlight. In oxidative phosphorylation, ATP is produced by energy released by the oxidation of nutrients (Boyer, 1977). In photophosphorylation, light energy is used to create a high-energy electron donor and a lower-energy electron acceptor. In oxidative phosphorylation, electrons are transferred from electron donors to electron acceptors such as oxygen, in various redox reactions which are carried out by a series of protein complexes within mitochondria among eukaryotes and...
2 Pages(500 words)Essay
Microbiology
...?Microbiology Microbiology is the science that studies microorganism. They can be pathogenic or non-pathogenic; they can be beneficial for human environment or be hazardous for human health. This research comprises similarities and differences between Variola viruses or Poxvirus and Staphylococcus epidermis. Moreover, benefits of non-pathogenic microorganisms in human environment are discussed further on. Variola virus and Staphylococcus epidermis: comparing and contrasting Variola virus infects human beings. It can be transmitted to other humans via face-to-face contact or contact with other objects, or through the air. Nevertheless, not all the ways of the virus transmission have been fully defined and studied by the scientists... Microbiolo...
2 Pages(500 words)Essay
MICROBIOLOGY
...? Microbiology Practical Describe the full theory behind the catalase test. Why must plain agar be used? Catalase is an enzyme that converts hydrogen peroxide to water and oxygen. Aerobic and facultative organisms have developed various protective mechanisms against the toxic forms of oxygen (especially superoxide radicals as they can potentially inactivate vital cell components). Enzyme known as superoxide dismutase, eliminates superoxide radicals by enhancing the rate of reaction. During the process toxic substance hydrogen peroxide (H2O2) and hydroxyl radical (OH-) are produced, which in turn is dissipated by catalase and peroxide enzymes respectively. Catalase test is used to identify organisms that are capable of...
10 Pages(2500 words)Coursework
Microbiology
... of Lactic acid producing Bacteria and preparation of Camel Milk Cheese by using Starter Culture, Pakistan Veterinary Journal, Vol.24, No.2. Benson, HJ., 2001. Microbiological Application: Laboratory Manual in General Microbiology, McGraw –Hill. Dart, RK., 1996. Microbiology for the Analytical Chemist, Royal Society of Chemistry. Gunasekaran, P., 2007. Laboratory Manual in Microbiology, New Age International. Hoque, MZ, Akter, F, Hossain, KM, Rahman, MSM, Billah, MM and Islam, KMD., 2010. Isolation, Identification and Analysis of Probiotic Properties of Lactobacillus Spp. From Selective Regional Yoghurts, World Journal of Dairy and Food sciences, Vol.5, No.1, pp: 39-46. Lessard, MH, Belanger, G, St- Gelais, D and Labrie, S., 2012... . The...
6 Pages(1500 words)Lab Report
Microbiology
.... This will definitely lead us into future challenges and newer perspectives regarding the nature of the GI tract microbiota in diabetic mammalian systems. References 1. "Enterococcus Agar according to Slanetz and Bartley", 2000, The Royal Veterinary and Agricultural University of Copenhagen, retrieved from: http://www.microbiologyatlas.kvl.dk/biologi/english/showbio.asparticleid=plade%2011 on January 1, 2009. 2. "BACTERIOLOGY - CHAPTER ELEVEN ENTEROBACTERIACEAE VIBRIO, CAMPYLOBACTER AND HELICOBACTER", 2007, Microbiology and Immunology Online University of South Carolina School of Medicine, retrieved from: http://pathmicro.med.sc.edu/fox/enterobact.htm on January 1, 2009. 3. "Mannitol...
30 Pages(7500 words)Lab Report
Helicobacter pylori in gastrointestinal disorders
...Introduction Helicobacter pylori is a slow growing, highly motile, microaerophilic, spiral-shaped, gram-negative bacteria (Graham & Sung, 2006). It is reported that at least 50% of the worlds population is infected with H. pylori (Ables, Simon, Melton, 2007). H.pylori is linked to histologic gastritis, peptic ulcer disease, primary B cell gastric lymphoma and adenocarcinoma of the stomach (Graham & Sung, 2006). The bacterium shows an affinity for the gastric epithelium and elicits a strong inflammatory and immune response (Graham & Sung, 2006). The most characteristic biochemical feature of H. pylori is the production of urease (Graham & Sung, 2006). Epidemiology H.pylori infection is typically acquired in childhood... , 2006). ...
12 Pages(3000 words)Essay
MICROBIOLOGY
...1. a. Substances capable of inducing specific immune responses are referred to as antigens. The properties of a good antigen are – 1. Induction of an immune response(immunogenecity) 2. Specific reaction with antibodies or sensitized cells( immunological reactivity) b. 2. a b. Immunoglobulin are of 5 classes namely IgG, IgA, IgM, IgD & IgE. IgG: - This is the major serum immunologlobulin constitutes about 80% of total serum immunoglobulin. It has a molecular weight of 1,50,000. There are four IGg sub classes in humans, IgG1, IgG2, IgG3, IgG4 IgA: - This is the 2nd most abundant class, constituting about 10-15% of serum immunoglobulin. It is a major... a. Substances...
2 Pages(500 words)Essay
Microbiology
...Microbiology Introduction: The food ingredients that are used in the domestic kitchen are found to contain potential pathogenic micro organisms. They are found to cause large outbreaks of food borne diseases. The foods are prepared either by the untrained people or trained people without following the food safety methods. Of the foods, poultry was identified as the major source for pathogenic micro organisms mainly concentrated on the raw chicken that are mainly concentrated with Escherichia Coli, Campylobacter, Salmonella and Staphylococcus. The raw chicken wash waters are found to contain a large number of coliform and the hygiene of the washing up clothes is also generally poor. An evaluation of the total viable count...
6 Pages(1500 words)Essay
H. pylori
...might physicians of the future prescribe Helicobacter as a pro biotic for treating patients? H pylori absence in the body might lead to an increased risk of numerous diseases. According to various studies conducted, it is known that esophageal diseases presence is high on H pylori negative individuals. Its absence can lead affect the stomachs micro biota. The lack of H pylori mostly among kids has led to increased risk of asthma and allergies (Martin 7). Virulence factors are structures, chemicals, and metabolic functions that increase the chance an organism will cause disease. C A G (A) and V a C (A) are virulence factors of Helicobacter...
2 Pages(500 words)Research Paper
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.
Let us find you another Case Study on topic Helicobacter pylori (Microbiology CS3) for FREE!
Contact Us