Warning: Use of undefined constant referer - assumed 'referer' (this will throw an Error in a future version of PHP) in /usr/home/essaywo/public_html/essays on line 102

Warning: Use of undefined constant host - assumed 'host' (this will throw an Error in a future version of PHP) in /usr/home/essaywo/public_html/essays on line 105

Warning: Cannot modify header information - headers already sent by (output started at /usr/home/essaywo/public_html/essays:102) in /usr/home/essaywo/public_html/essays on line 106

Warning: Cannot modify header information - headers already sent by (output started at /usr/home/essaywo/public_html/essays:102) in /usr/home/essaywo/public_html/essays on line 109
Cholera: Virulence, Origin, And Pandemics - School Essays

Cholera: Virulence, Origin, And Pandemics



Merriam Webster’s Tenth Edition College Dictionary describes virulence as the rapid course, severity, or malignancy of a disease or infection caused by a microorganism [pathogen] to overcome body defenses of the host. Ewald (1) looks at virulence in two spectrums depending upon mortality rates of the infected hosts. The first, analogous to the human immunodeficiency virus (HIV), is one in which all hosts that become afflicted with the pathogen ultimately die due to progression of the virus—namely acquired immune deficiency syndrome (AIDS) in this example. Since the mortality rate is 100%, it does no good to measure virulence in this way. Instead, different strains of HIV can be ...

Want to read the rest of this paper?
Join Essayworld today to view this entire essay
and over 50,000 other term papers

kill more hosts. If mortality rates are very low or not present at all, greater virulence can be expressed as causing more symptoms of illness. One such pathogen is Vibrio cholerae, which causes the disease known as cholera. The subject of this paper will focus on the V. cholerae pathogen and the significance of its presence on Earth. I will examine virulence patterns of various strains of V. cholerae, and what they are inclined to do.
Come (from) Hell or High (risk) Water?
Cholera’s origin is a topic that has been widely debated over the years. Some think that it dates back thousands of years to the first human civilizations that obtained water from public sources (1). Another common perception among religious leaders is that it is a great plague sent by their angered deity or deities, depending upon the religious group or which we are speaking, of course. Still, others feel that cholera is a relatively new disease dating back only about two hundred years. I am not ...

Get instant access to over 50,000 essays.
Write better papers. Get better grades.


Already a member? Login

V. cholerae is the O antigen, which has multiple classifications systems itself. Easily stated, there are 139 different O groups now known. V. cholerae of the O1 serogroup that produce a cholera toxin (CT) has been well documented as the main culprit of epidemic cholera outbreaks. The O1 serogroup can be further divided into three serotypes: Ogawa, Inaba, and Hikojima (4). V. cholerae is also split into two biotypes: classical and El Tor. The classical type is considered more virulent than the relatively mild El Tor. It simply has a higher mortality rate—15% compared to only about 2%--because it produces more cholera toxin than does El Tor (1). The El Tor V. cholerae strain ...

Succeed in your coursework without stepping into a library.
Get access to a growing library of notes, book reports,
and research papers in 2 minutes or less.


CITE THIS PAGE:

Cholera: Virulence, Origin, And Pandemics. (2004, June 8). Retrieved March 29, 2024, from http://www.essayworld.com/essays/Cholera-Virulence-Origin-And-Pandemics/9120
"Cholera: Virulence, Origin, And Pandemics." Essayworld.com. Essayworld.com, 8 Jun. 2004. Web. 29 Mar. 2024. <http://www.essayworld.com/essays/Cholera-Virulence-Origin-And-Pandemics/9120>
"Cholera: Virulence, Origin, And Pandemics." Essayworld.com. June 8, 2004. Accessed March 29, 2024. http://www.essayworld.com/essays/Cholera-Virulence-Origin-And-Pandemics/9120.
"Cholera: Virulence, Origin, And Pandemics." Essayworld.com. June 8, 2004. Accessed March 29, 2024. http://www.essayworld.com/essays/Cholera-Virulence-Origin-And-Pandemics/9120.
JOIN NOW
Join today and get instant access to this and 50,000+ other essays


PAPER DETAILS
Added: 6/8/2004 04:22:07 AM
Category: Health & Medicine
Type: Premium Paper
Words: 3002
Pages: 11

Save | Report

SHARE THIS PAPER

SAVED ESSAYS
Save and find your favorite essays easier

SIMILAR ESSAYS
» Drill Press
» Booker T. Washington
» Serial Killers
» Comparision Of Jack London
» Morality
» Creative Writing: The Fossilize...
» The Best Way To Make Cappuccin
» The Root Of Western Civilizatio...
» Adding and Subtracting Decimals
» Creative Story: Intellegence
Copyright | Cancel | Contact Us

Copyright © 2024 Essayworld. All rights reserved