The septicemic plague comes via fleas or from contact with body infected by plague and spreads through the blood stream
Pneumonic plague is the most infectious type; it is when the disease passes from person to another through airborne droplets coughed from the lungs. It kills about 50 percent of those it infects.
The Black plague has three major plague pandemics. The Justinian Plague, the Great Plague and the Modern Plague. The Justinian plague is the first pandemic that has been recorded, it was named after the Byzantine emperor Justinian I. The plague began in 541 A.D. and killed more than 25 million people and spread around the Mediterranean.
The great plague or the Black Death as it is known …show more content…
Over the following 20 years, it spread to cities around the world by rats on steamships. The plague caused 10 million deaths. Scientists identified that the causative agent as a bacterium and set that plague is spread by toxic flea bites. Rat plague was soon brought under control in most civilized areas, but the pandemic spread easily to the local citizens of small mammals and ground squirrels in Africa, Asia and the Americas. These new species which carried the pandemic have allowed plague to become native in many outback, including the western U.S. However it is a bacterial disease but it can be treated with antibiotics, and it can be prevented by treatment and prompt identification.
The Black plague was used in brutal ways. As a deadly disease with a very high mortality rate, Yersinia pestis was used as a biological weapon in wars. Some war strategies included dropping fleas which is infected with the plague from airplanes. Plague raised concern as dangers threaten on the national security because it could be used by