Wait a second!
More handpicked essays just for you.
More handpicked essays just for you.
Life history of Streptococcus pyogenes
Apa paper on necrotizing fasciitis
Streptococcus pyogenes contract
Don’t take our word for it - see why 10 million students trust us with their essay needs.
Recommended: Life history of Streptococcus pyogenes
Streptococcus Pyogenes: Multi-Purpose Monsters
Streptococcus pyogenes is a type of group A streptococci that causes many infectious diseases. This bacteria is commonly found in a variety of organisms, but is usually harmless unless the organisms defenses are compromised. When detrimental, group A streptococci cause infections such as impetigo, ecthyma, scarlet fever, and necrotizing fasciitis. Each of these infections displays different symptoms and requires different treatment. These treatments are primarily by antibiotics, because antibiotics are still the chief cure for GAS bacterial infections. One of the most interesting, rare, and fatal infections caused by streptococcus pyogenes is necrotizing fasciitis, and though it can cause some severe symptoms, a simple dose of antibiotics can prevent or even cure this dangerous infection.
Streptococci are a large, diverse group of bacteria that are gram-positive cocci (Sharma). Streptococcus Pyogenes, a group A Streptococcus, is a universal organism that can cause many different diseases in humans (Sharma). Group A Streptococci are commonly referred to as GAS and they are commonly identified on blood agar plates as white or gray colonies (Sharma). They commonly appear in pairs or short chains that are non-motile and non-spore-forming (Sharma). Additionally, they have a fermentative metabolism, and are facultative anaerobes that require blood to grow (Todar). For this reason, GAS bacteria are often found in mammals. It is estimated that 15%-20% of all healthy individuals harbor this pathogen in their bodies, specifically their respiratory tract—without signs of disease (Todar). However, it is believed that the bacteria can cause harm if the organism’s defenses are compromised or th...
... middle of paper ...
...July 2008 .
DeLeo, Frank R., and Michael Otto. Bacterial Pathogenesis Methods and Protocols. Methods on Microbiology 431. Totowa, NJ: Humana Press, 2008.
“Necrotizing Fasciitis (Flesh-Eating Bacteria).” WebMD. 6 Dec. 2007. Healthwise Inc. 14 July 2008 .
Rene, Caravano. Current Research on Group A Streptococcus . Paris, France: Excerpta Medica Foundation, 1968.
Sharma, Sat, MD. “Streptococcus Group A Infections.” eMedicine. 5 May 2006. WebMed. 24 July 2008 .
Todar, Kenneth. “Streptococcus Pyogenes.” Todar’s Online Textbook of Bacteriology. 2002. University of WIsconsin-Madison. 14 July 2008 .
The purpose of this study is to identify an unknown bacterium from a mixed culture, by conducting different biochemical tests. Bacteria are an integral part of our ecosystem. They can be found anywhere and identifying them becomes crucial to understanding their characteristics and their effects on other living things, especially humans. Biochemical testing helps us identify the microorganism present with great accuracy. The tests used in this experiment are rudimentary but are fundamental starting points for tests used in medical labs and helps students attain a better understanding of how tests are conducted in a real lab setting. The first step in this process is to use gram-staining technique to narrow down the unknown bacteria into one of the two big domains; gram-negative and gram-positive. Once the gram type is identified, biochemical tests are conducted to narrow down the specific bacterial species. These biochemical tests are process of elimination that relies on the bacteria’s ability to breakdown certain kinds of food sources, their respiratory abilities and other biochemical conditions found in nature.
This indicated that there was no lysis of red blood cells. By looking at the plate, there was no change in the medium. Next an MSA test was done and the results showed that there was growth but no color change. This illustrates that the unknown bacteria could tolerate high salt concentrations but not ferment mannitol. The MSA plate eliminated Streptococcus pneumonia and Streptococcus pyogenes as choices since the bacteria can’t grow in high salt concentrations.
In this experiment the heat shock method will be used to deliver a vector (plasmid) of GFP to transform and grow E. coli bacteria. Four plates containing Luria Bertani (LB) broth and either –pGLO and +pGLO will have E. coli bacteria added to it. The plate containing –pGLO (no pGLO) and LB will show growth as ampicillin will be present killing bacteria but no glowing because no arabinose will be present for glowing to be activated, the same result will be seen in the plate containing +pGLO, LB and ampicillin. The plate with –pGLO, LB and ampicillin will show no growth and no glowing as no arabinose is present for glowing to be activated
It is not unusual for some healthy women to harbor Group B streptococcus bacteria in their rectum and vagina. These microorganisms do not usually cause disease when few in number, but when they grow in number and colonize these areas, bacterial infection can become severe.
This pathogen, Streptococcus pneumoniae, is a gram-positive coccus that is long shaped and usually seen in groups of pairs (Todar, 2008-2012). This pathogen ranges from o.5-1.25 micrometers, which is pretty small in size (Todar, 2008-2012). It “lacks catalase and ferments glucose into lactic acid” (Todar, 2008-2012). To grow this bacterium in the lab the best way to do it would be to grow it on a blood agar at 37 degrees Celsius and produces a green zone arou...
With the earliest recordings coming from the Fifth Century B.C., streptococcus pyogenes, and more frequently, its symptoms have been prevalent among doctors and historians for hundreds of years. The first mentioning of streptococcus pyogenes is to be credited to Hippocrates, in which he describes the relative symptoms of the flesh-eating bacteria in its early stages. Then depicted by Billroth in 1874, patients carrying erysipelas were determined to have this certain bacterial infection. In 1883, the chain-forming bacteria were isolated by Fehleisen; and in the following year, Rosenbach applied the S. pyogenes name. Further advances in hemolytic and non-hemolytic studies were made by Lancefield in the 1930’s, in which the alpha, beta, and gamma subgroups of the hemolytic structures – detailed and defined by Schottmueller and Brown - were divided into serotypes.
Necrotizing fasciitis is a bacterial infection that is very serious and sometimes fatal. This disease spreads very quickly and destroys soft tissue in your body. This disease is caused by multiple bacteria: group A strep, E.coli, Klebsiella (causes pneumonia), Clostridium (causes diarrhea), Staphylococcus (causes staph infections), and Aeromonas hydrophila (causes diseases in almost all organisms, hard to resist). The bacteria group A strep is the leading cause for necrotizing fasciitis.
What is Strep Throat you ask? Strep throat is a sore throat with fever caused by streptococcal infection. Sore throats are most commonly caused by viral infections or other irritants such as smoke, allergies, dry air, or a throat injury, and not by a strep infection. A strep infection causes the throat (pharynx) and the tonsils or adenoids to become irritated, inflamed, and painful. Strep throat is caused by streptococcal (strep) bacteria, most often by group A beta-hemolytic streptococcus (GABS). Other types of strep that can sometimes infect the throat are groups C and G strep bacteria. How the strep infection is spread? Strep throat can be passed from person to person. When a person infected with strep throat breathes, coughs, or sneezes, tiny droplets containing the strep bacteria are released into the air and are breathed in by other people.
Life History and Characteristics: Staphylococcus aureus is a gram positive bacterium that is usually found in the nasal passages and on the skin of 15 to 40% of healthy humans, but can also survive in a wide variety of locations in the body. This bacterium is spread from person to person or to fomite by direct contact. Colonies of S. aureus appear in pairs, chains, or clusters. S. aureus is not an organism that is contained to one region of the world and is a universal health concern, specifically in the food handling industries.
(Nemours, 1995-2011) The two main bacteria precipitating Impetigo are staphylococcus aureus, the most common cause, and streptococcus pyogenes. If left untreated, streptococcus pyogenes can also cause post-streptococcal glumerulonephritis, or a disease that causes inflammation of the kidney to occur following a strep throat infection. Although this is rare, standard precautions must still be taken to prevent these repercussions. Staphylococcus aureus and streptococcus pyogenes are the main causes of impetigo, but they are not the only.
Necrotizing fasciitis is caused most commonly by Streptococcus pyogenes, group A streptococcus, which is the same bacteria that causes common strep throat 8.
Tettelin, H., Nelson, K. E., Paulsen, I. T., Eisen, J. A., Read, T. D., Peterson, S., et al. (2001). Complete genome sequence of a virulent isolate of Streptococcus pneumoniae. Science. Retrieved from http://www.sciencemag.org/content/293/5529/498.short (Accessed December 12, 2013).
our everyday lives bacteria is constantly surrounding us, some of the bacterium that we encounter are beneficial to us but then there are the ones that are severely detrimental to our health. The way that they effect a persons body can differ from person to person. Many of the “microscopic foes” are very resilient and have a very fast reproduction rate. Not only do they reproduce quickly they sometimes seem to outsmart our immune system and not allow our bodies to fight the infection making it almost impossible to stop them. One thing that a lot if people rely on is the assistance of prescription drugs to get them better but even the drugs are not being effective and we can’t stop the pathogens from invading our personal places such as work, home, school, or anywhere. Even though modern medicine is advancing the pathogens could still get the get the best of us. The scary thing is we never know when the next pandemic or epidemic is going to arise. All it needs is some ordinary microbe to swap genes with a deadly germ to produce a “super pathogen” and it could happen to anyone, anywhere, as it did to Jeannie Brown who is from “our neck of the woods”.
Streptococcus pyogenes is thought to live benignly within one in five people, and is thusly one of the most common pathogens among humans. Due to its common
Enterococcus faecalis is a genus of gram positive cocci and form short chains or are arranged in pairs. They are nonmotile, facultative anaerobic organisms and can survive in harsh conditions in nature. There are over 15 species of the Enterococcus genus but about 90% of clinical isolates are E. faecalis. E. faecalis is a nosocomial pathogen because it is commonly found in the hospital environment and can cause life-threatening infections in humans. It is a bacterium that normally inhabits the intestinal tract in humans and animals but when found in other body locations it can cause serious infections. The most common sites for E. faecalis infections are the heart, bloodstream, urinary tract, and skin wounds. Due to vancomycin-resistant Enterococci, many antibiotics have been shown ineffective in the treatment. In this paper, I will describe the ecology and pathology of E. faecalis; the antibacterial resistance; treatment; and, what you can do to prevent Enterococcus infection.