Yersinia

pestis Yersinia pestis is a type of bacteria that affects humans and other animals. It is the causative agent of plague, an infectious and often fatal disease that has a long history of outbreaks throughout different parts of the world. Yersinia pestis is primarily transmitted to humans through the bite of infected fleas or through contact with infected animals and their secretions. Symptoms of plague include fever, painful swelling of the lymph nodes, and body aches. In extreme cases, it can lead to death if left untreated. Yersinia pestis can be treated with antibiotics, although treatment success is dependent on catching the disease in its early stages. Today, vaccination and timely administration of antibiotics are the most effective preventative measures against Yersinia pestis.