Yersinia pestis

    Page 1 of 29 - About 285 Essays
  • Yersinia Pestis

    Origin and Routes of Dissemination Towards the end of the 1330s, a coccobacillus called Yersinia Pestis, which slumbered for centuries in the blood of rats underwent a deadly exodus. The rats were immune to the bacteria in their bloodstream, but not the fleas that fed on their blood. A toxin produced by Yersinia Pestis blocked the abdomen of the flea thus inhibiting it from swallowing the blood it sucked out of the rat. Then, when a flea bit a human, it would deposit the blood from the rat infected with the bacteria into the human’s blood stream. The first victim or patient zero of the plague was thus infected. In 1347, the fast-expanding Mongolian empire sought the acquisition of the strategic town of Caffa, which was a…

    Words: 1400 - Pages: 6
  • Essay On Yersinia Pestis

    civilization has been under the threat of extinction. One such time, arguably the most infamous, was when the Black Death ravaged the western hemisphere. For several hundred years, the cause of this devastating disease remained a mystery, however, recent analysis from the DNA of the victims of the plague indicate that Yersinia pestis a bacillus shaped bacterium, was the likely cause of this tragedy (Perry and Fetherston, 1997). The road leading up to Y. pestis becoming God’s bacterial agent of…

    Words: 986 - Pages: 4
  • Yersinia Pestis Research Paper

    Yersinia pestis One of the five bacterium I identified was Yersinia pestis. It is a gram negative rod and these are the tests that identified it (and the results of those tests): gram morphology (g-rod), oxidase (negative), lactose fermentation (negative), indole (negative), urease (negative), motility (negative), orthine dicarboxylase (negative). These tests were chosen as directed by my flow chart. Discovery During a plague epidemic in Hong Kong in 1894, Yersinia pestis was discovered by…

    Words: 954 - Pages: 4
  • Yersinia Pestis: The Cause Of The Bubonic Plague

    This virus is a gram negative rod shaped bacteria classified as coccobacillus. A coccobacillus has short rods that may be confused for a cocci shape. Y. Pestis is a nonmotile, nonsporulating, facultative anaerobe. The bacteria settles in the midgut of a flea and its plasmid is phospholipase D lined membrane allows the bacteria to survive among the digestive and intestinal juices. When the bacteria reproduces in the gut it forms a mass in the stomach going up into the esophagus, essentially…

    Words: 1074 - Pages: 4
  • Bubonic Plague Yersinia Pestis

    The Bubonic Plague is a bacteria known as Yersinia Pestis that infects the lymphatic system causing it to become inflamed (Tonsils, Adenoids, Spleen, and Thymus). The bacteria needs calcium to grow but when there is no calcium it produces amino acids called aspartic acid. Aspartic acid raises the blood plasma level of aspartate and glutamate. This excess can lead to damage of sensitive neurons. It can also help generate cellular energy, balance neurochemistry, and help the liver rid the body of…

    Words: 334 - Pages: 2
  • Bubonic Plague

    Septicemic plagues, and they were all caused by the same germ, Yersinia Pestis. Yersinia Pestis, once called Pasteurella pestis1, "is a Gram-negative, rod-shaped coccobacillus, a facultative anaerobic organism"1. A Gram negative baterium can't be stained by crystal violet stain. This kind of bacterium has an extra, outer layer, that is made of proteins, that keeps the stain out9. Rod shaped…

    Words: 766 - Pages: 4
  • Bubonic Plague Research Paper

    Bubonic plague, a deadly disease that is transported to humans through fleas, has been a worldwide issue from as far back as the year 1347 A.D. This disease has caused more than 200 million deaths since its first rampage in Europe. The bacteria Yersinia pestis has been researched to be the main cause of bubonic plague, but at one time there were many speculations as to the cause of this plague. Inspired by S. Scott and C. Duncan’s “Biology of plagues” and “Return of the Black Death”, George…

    Words: 1024 - Pages: 5
  • Diseases In The Fourteenth Century

    Throughout fourteenth century Europe and likewise the present century, disease is a common thing. However, in the present day scientific advances in medicine and science have aided those significantly in the combat against these diseases. To begin with, diseases like those of the Bubonic Plague and SARS originated from virus/bacteria, and only surfaced when exposed. The Bubonic Plague is caused by a bacterium identified as Yersinia pestis, or Y pestis. It was first discovered in the province…

    Words: 401 - Pages: 2
  • Pneumonic Plague Research Paper

    It is received by getting bit by a rodent or flea or when Yersinia pestis enters the bloodstream. The most serious and deadliest form is the pneumonic plague, although it is rare. It occurs when Yersinia pestis spreads to the lungs and causes pneumonia. This form of the plague is so dangerous that if an infected person coughs, the bacteria from their lungs is discharged into the air, giving anyone around him, the disease. This can lead to an epidemic. There are two types of pneumonic plague,…

    Words: 1104 - Pages: 5
  • Pros And Cons Of Plague

    Why is The Plague SO Good at Killing? There are some factors about the Yersinia pestis that make it an infecting machine. Y. pestis creates two anti-phagocytic antigens, F1 antigen and VW antigen. An anti-phagocytic antigen is defined as, a substance in the immune system’s cells that eats harmful pathogens. Both the F1 and the VW antigen are necessary for the bacteria to grow, as is the temperature, 37degrees Celsius. It is because of this need for a certain temperature, lower than which fleas…

    Words: 1407 - Pages: 6
  • Previous
    Page 1 2 3 4 5 6 7 8 9 29

Related Topics:

Popular Topics: