An overview of the black plague and the different forms of plagues

Third plague pandemic The third plague pandemic — started in China in the midth century, spreading to all inhabited continents and killing 10 million people in India alone. Symptoms are high fevers and purple skin patches purpura due to disseminated intravascular coagulation.

A transmissible disease will spread easily in such conditions. Disease killed as much as one-third of the population in some areas, and decimated the Roman army. Modern therapy has reduced the global fatality rate of plague from its historical level of 50—90 percent to less than 15 percent.

The septicemic form is spread when an open sore or cut on a person comes into contact with the body fluids of an infected person. In April, thousands of rats stagger into the open and die. Bubonic plague is the best-known form in popular lore, and indeed it constitutes about three-fourths of plague cases.

The bubonic plague itself is not lethal and the boils heal themselves. The effectiveness of these measures is told in the declining numbers of plague deaths over the following decades.

To learn about risk factors for plague and current prevention and treatment strategies visit the MedlinePlus plague site. In Italy, the population of Florence was reduced from ,—, inhabitants in down to 50, in Those swellings are developed by the infection of the lymph notes and the lymphatic vessels around the flea bite.

This species of flea is the primary vector for the transmission of Yersinia pestisthe organism responsible for bubonic plague in most plague epidemics. Examples of rodents that carry plague include the black rat Rattus rattus and the great gerbil Rhombomys opimus.

See Article History Plague, infectious fever caused by the bacillus Yersinia pestisa bacterium transmitted from rodent s to humans by the bite of infected fleas. Since this is not truly doable, the only real control is the resistance to the disease developed by the indigenous rat population, cold weather, quarantine, and decent sanitation in high population areas.

Induring the epidemic in Hong Kong, the organism that causes plague was isolated independently by two bacteriologists, the Frenchman Alexandre Yersinworking for the Pasteur Institute, and the Japanese Kitasato Shibasaburoa former associate of Koch.

The lymph nodes are painful and often break open. The CDC reports that the US averages from 5 to 15 confirmed cases of plague per year, mostly in the west, and mostly among hunters.

This may lead to a situation of super-infections when the body becomes prone to infections through other bacterial species.

Frequently Asked Questions

It often shows itself with light fever and a little swelling of the lymph nodes. The plaque is found in the indigenous wildlife of every continent except Australia.

The World Health Organization states that between 1, cases are reported each year worldwide, but there are estimated to be more cases that go unreported. He greets the plague epidemic with open arms because he no longer feels alone in his fearful suffering.

The Plague

Over the next half-century, the pandemic spread westward to port cities of the Mediterranean and eastward into Persia. However, bubonic plague may lead to pneumonic plague. The pneumonic and septicemic forms reservoirs are infected animals and people, and are almost never anything except an infected person.

Scott and Duncan have argued that the pandemic was a form of infectious disease that they characterise as hemorrhagic plague similar to Ebola. This blockage results in starvation and aggressive feeding behaviour by the fleas, which repeatedly attempt to clear their blockage by regurgitationresulting in thousands of plague bacteria being flushed into the feeding site, infecting the host.

Black DeathPlague victims during the Black Death, 14th century. In addition to arguing that the rat population was insufficient to account for a bubonic plague pandemic, sceptics of the bubonic plague theory point out that the symptoms of the Black Death are not unique and arguably in some accounts may differ from bubonic plague ; that transference via fleas in goods was likely to be of marginal significance; and that the DNA results may be flawed and might not have been repeated elsewhere or were not replicable at alldespite extensive samples from other mass graves.

Spread of the infection among wild or domestic rodents in the vicinity of human habitations creates conditions favourable for outbreaks of human plague, for when an epizootic outbreak kills off the rodents, fleas from the dead animals fail to find another rodent host and thus begin to infest humans.

The army managed to disperse the crowd yet again and finally suppressed the riot. According to the historian Procopius and others, the outbreak began in Egypt and moved along maritime trade routes, striking Constantinople in Huge pandemics also arose in Asia in the late 19th and early 20th centuries, eventually spreading around the world and causing millions of deaths.

The common name, The Black Death referred to the appearance of black spots on the body, The Bubonic Plague referred to the appearance of severely swollen lymph nodes, up to apple sized, which were called buboes.Pneumonic plague, the most infectious type, is an advanced stage of bubonic plague when the disease starts being passed directly, person to person, through airborne droplets coughed from the lungs.

What are the different forms of plague? There are three forms of plague: Skin and other tissues may turn black and die, especially on fingers, toes, and the nose.

Septicemic plague can occur as the first symptoms of plague, or may develop from untreated bubonic plague. This form results from bites of infected fleas or from handling an. What is the difference between the Black Death and the bubonic plague?

Bubonic plague is caused by a bacteria, Yersinia pestis. The Black Death refers to a specific outbreak of bubonic plague in the s in Europe. The Black Death. by Craig McCasland. Disease name: Plague, Bubonic Plague, The Black Death. There are three forms of the plague.

The first is the Bubonic form, the second is the pneumonic form, and the third is the septicemic form. (1). Summary. The Plague is a novel about a plague epidemic in the large Algerian city of Oran.

In April, thousands of rats stagger into the open and die. When a mild hysteria grips the population, the newspapers begin clamoring for action. The Black Death. by Craig McCasland. Disease name: Plague, Bubonic Plague, The Black Death.

There are three forms of the plague. The first is the Bubonic form, the second is the pneumonic form, and the third is the septicemic form.

Download
An overview of the black plague and the different forms of plagues
Rated 3/5 based on 3 review