Symptoms of Plague What Are the Symptoms of Plague?
Nov 21, 2019
Source: Cainiu Health
Dr. Li Yi
Introduction
Symptoms of Plague:
1. **Pneumonic plague**: Symptoms include chest pain, cough, hemoptysis (coughing up blood), dyspnea (shortness of breath), and cyanosis.
2. **Septicemic plague**: Symptoms include high fever, altered mental status, delirium, or coma.
3. **Bubonic plague**: Symptoms include systemic toxicity and acute lymphadenitis.
4. **Mild plague**: Characterized by localized lymphadenopathy (swollen lymph nodes), mild tenderness, and occasionally suppuration.
Plague is a highly infectious disease caused by Yersinia pestis. It is a zoonotic disease with natural foci, primarily circulating among rodents. Rodents and marmots serve as natural reservoirs for Yersinia pestis. Clinically, plague is classified into four main types: bubonic, pneumonic, septicemic, and mild (abortive) plague—each presenting distinct symptoms. So, what are the symptoms of plague? The following section addresses this question.
Symptoms of Plague
1. Symptoms of Pneumonic Plague
Pneumonic plague is the most severe form, with an extremely high fatality rate. It manifests abruptly and progresses rapidly, causing systemic toxicity. Patients quickly develop severe chest pain, cough, and hemoptysis. As the disease advances, dyspnea and cyanosis appear. Without prompt medical intervention, death may occur due to heart failure or hemorrhage.
2. Symptoms of Septicemic Plague
Septicemic plague presents with sudden high fever—or paradoxically, hypothermia—altered mental status (e.g., delirium or coma), and absence of lymphadenopathy. Cutaneous and mucosal manifestations include petechiae, epistaxis, vomiting, hematochezia, hematuria, and signs of cardiac failure. Septicemic plague may evolve from pneumonic or bubonic plague and exhibits variable severity.
3. Symptoms of Bubonic Plague
Bubonic plague features systemic toxic symptoms alongside acute lymphadenitis, particularly in the inguinal region. Lymph nodes in the axillae, neck, and submandibular area also become inflamed and enlarged.
4. Symptoms of Mild (Abortive) Plague
Mild plague is characterized by localized lymphadenopathy with mild tenderness; suppuration may occasionally occur. Patients experience only low-grade fever and remain functionally unimpaired—able to continue daily activities and work normally. This form is commonly observed during the early or late stages of an outbreak or in individuals who have received prophylactic vaccination.
In summary, plague is categorized into four clinical forms: pneumonic, septicemic, bubonic, and mild plague. Pneumonic plague manifests with chest pain, cough, hemoptysis, dyspnea, and cyanosis; septicemic plague presents with high fever, altered consciousness, delirium, or coma; bubonic plague features systemic toxicity and acute lymphadenitis; and mild plague is marked by localized lymphadenopathy, mild tenderness, and occasional suppuration.
