Pulmonary Ascariasis
Introduction
Introduction to pulmonary ascariasis It is mainly caused by paralytic migration, parasitic worms and parasites caused by deposition of eggs and lungs, accounting for the second place in ectopic ascariasis (the first is biliary ascariasis). basic knowledge The proportion of illness: 0.001% Susceptible people: no special people Mode of infection: fecal-mouth transmission Complications: lung abscess pulmonary embolism
Cause
Causes of pulmonary ascariasis
(1) Causes of the disease
People are generally susceptible to aphids, and eggs enter the body through mouth. Therefore, there are raw vegetables, and people who are used to melons are easily infected.
(two) pathogenesis
After accidentally swallowing the infected mites, the humans hatch in the small intestine and smash the shells and reach the lungs through three pathways:
1 through the small intestine mucosa, microvascular, portal vein, hepatic vein, inferior vena cava, right heart, pulmonary artery to lung;
2 through the small intestinal mucosa lymphatic vessels, thoracic duct, left heart to lung;
3 through the small intestine wall into the abdominal cavity, and then through the liver, diaphragm, chest into the lungs, sputum can damage the pulmonary capillaries and alveolar caused by spotted hemorrhage, alveolar, bronchiolitis and eosinophils Infiltration, increased mucus secretion or formation of eosinophilic granuloma, hemorrhagic pneumonia and pulmonary lobular embolism in a large infection, adult worms can also enter the chest through the liver to the lungs, or through the venous system through the right heart to the lungs It can also cause lung abscess, pulmonary embolism or asphyxia through the pharynx, trachea, and bronchus to the lungs. After the female invades, it can lay eggs in the lungs, causing eosinophilic abscess, granuloma and pseudotuberculous nodules.
Prevention
Prevention of pulmonary ascariasis
Main measures:
1. The feces are treated harmlessly, try not to work in the susceptible area, and advocate wearing shoes.
2. Pay attention to hygiene, food that is not eaten raw or not cooked.
3. A group with a high number of infected people in the epidemic area should be treated comprehensively.
Complication
Pulmonary ascariasis complications Complications, lung abscess, pulmonary embolism
Combined with lung abscess and pulmonary embolism.
Symptom
Symptoms of pulmonary ascariasis common symptoms hemoptysis with fever, weak eosinophilia, chest tightness, hernia, chest tightness
1, mainly chills, fever, chest tightness, itchy throat, dry cough, urticaria, a small number of patients may have asthma, difficulty breathing, bloody sputum, chest pain, headache, convulsions, coma and other symptoms of toxic encephalopathy.
2, signs are often absent or there are two lungs scattered in the wet and dry voice, toxic brain disease can have pupillary changes, Pap stagnation, Klinefelter positive and other performance, laboratory tests in the early stage of acute infections can be around Blood eosinophils increase, generally up to 20% to 70%, or you can find cockroaches or eggs.
3, X-ray chest showed that the lungs are scattered, point-like, flocculated or small-like edges blurred shadows.
Examine
Examination of pulmonary ascariasis
1, laboratory examination in the early stage of acute infection, there may be increased blood eosinophils in the surrounding blood, generally up to 20% to 70%, you can find cockroaches or eggs.
2, X-ray chest showed that there are scattered, point-like, flocculated or small-like edges blurring the lungs.
Diagnosis
Diagnosis and identification of pulmonary ascariasis
diagnosis
According to the comprehensive analysis of epidemiology, clinical manifestations and laboratory tests, the aphid infection is still dominated by parasitology.
Differential diagnosis
Pulmonary damage of pulmonary ascariasis should be distinguished from bronchial pneumonia, tuberculosis, and leptospirosis.
