Yersinia pestis (Plague)

Yersinia pestis is a bacterium that causes the disease known as plague, historically infamous for causing pandemics. It primarily spreads through bites from infected fleas, often found on rodents. Plague can manifest in several forms, the most severe being pneumonic and septicemic plague. Symptoms may include fever, chills, weakness, and swollen lymph nodes. Although it can be deadly, modern antibiotics are effective in treating the infection if caught early. Plague is rare today but still exists in some areas, and understanding it helps prevent outbreaks and safeguard public health.