Final answer:
The primary difference between Bubonic Plague and Pneumonic Plague is the mode of transmission and initial infection site. Bubonic plague is transmitted via flea bites, causing swollen lymph nodes, while Pneumonic plague directly infects the lungs and is spread through airborne droplets from coughing.
Step-by-step explanation:
The primary difference between Bubonic Plague and Pneumonic Plague lies in their mode of transmission and the initial site of infection in the human body. Bubonic plague, caused by the bacterium Yersinia pestis, is characterized by the appearance of swollen lymph nodes, known as buboes, along with other symptoms such as fever, nausea, and malaise. It is primarily transmitted to humans through the bite of infected fleas that have fed on plague-infected rodents.
On the other hand, Pneumonic Plague directly infects the lungs and is highly contagious as it can be spread from person to person through airborne droplets - a factor that contributed to the rapid spread of historical plagues. This form of plague manifests as a severe respiratory illness with symptoms like coughing and difficulty breathing and can lead to respiratory failure and shock.
While Bubonic plague cannot be spread from human to human, Pneumonic plague can, making it more dangerous in terms of containment and spread. Treatment with antibiotics is effective for both types, but it's crucial for Pneumonic plague to be addressed promptly due to its highly contagious nature and rapid progression.