Yersinia enterocolitica pneumonia
Introduction
Introduction to Yersinia enterocolitica pneumonia Most infections caused by Yersiniaenterocolitica involve the gastrointestinal tract, causing self-limiting gastroenteritis or mesenteric and terminal ileal glandular inflammation. Septicemia and its lung and other visceral involvement are rare, and cases of pneumonia usually occur in patients with cirrhosis or immunocompromised. basic knowledge The proportion of sickness: 0.004% - 0.007% Susceptible people: no specific population Mode of infection: fecal mouth spread Complications: sepsis
Cause
Causes of Yersinia enterocolitica pneumonia
Cause:
Enterobacteriaceae of Yersinia enterocolitica has a variety of serotypes and biotypes distributed in different sources. Most strains are lactose-free or low-lactose fermentation, urease-positive micro-aerobic or facultative anaerobic Generally, the medium grows slowly at 37 ° C, and the suitable temperature for separating bacteria is 22 ° C. The bacteria are cold-tolerant and can survive for 6 months in low-temperature water, but are sensitive to moist heat and chemical disinfectants.
Pathogenesis :
This bacteria can be inhaled into the lower respiratory tract through the mouth, causing primary pneumonia, but most of them enter the digestive tract first, causing ulceration of the small intestinal submucosal lymphoid tissue at the end of the ileum, mesenteric gland inflammation and portal bacteremia, bacteria. Can enter the lungs through the system, especially in patients with cirrhosis, prone to sepsis, bacterial virulence including V, W membrane antigen, temperature-sensitive calcium-dependent factors and endotoxin, but this endotoxin has not been found to have parenteral toxicity, knot Segmental erythema and non-suppurative polyarteritis may be caused by the formation of immune complexes.
Prevention
Prevention of Yersinia enterocolitica pneumonia
Precautions include avoiding rodents contaminating water resources. Refrigerated foods should be heated and boiled before they can be eaten. Those who are in close contact with the patient should wash their hands frequently to avoid contact with sick animals. For patients with cirrhosis and immune dysfunction, the chance of contracting the disease increases, especially the food and water hygiene must be guaranteed. Improve human immunity, poor physical fitness, low immune function is prone to Yersinia enterocolitica infection, so strengthen exercise, enhance physical fitness, help prevent this disease. Patients with other chronic diseases, the disease worsened after infection with Yersinia enterocolitica, such patients should pay attention to prevention and treatment of complications after infection. The active immune vaccine of Yersinia enterocolitica has yet to be developed.
Complication
Complications of Yersinia enterocolitica pneumonia Complications sepsis
Especially in patients with cirrhosis, sepsis is prone to occur.
Symptom
Yersinia enterocolitica pneumonia symptoms common symptoms abscess gastrointestinal symptoms lung consolidation sclerosing ascites liver failure septicemia
It is believed that this pathogen is a common cause of gastrointestinal inflammation, pneumonia and lung abscess. Pulmonary infection occurs in sepsis or primary inhalation infection. Clinical manifestations include cough, shortness of breath and lung consolidation. Symptoms, history of animal exposure and history of eating suspected contaminated food and water, liver cirrhosis patients with increased liver failure, ascites.
Examine
Examination of Yersinia enterocolitica pneumonia
Blood or sputum culture can be positive, gram-negative bacilli can be found in sputum, when there is pharyngeal infection, pharyngeal secretions can be found pathogenic bacteria, suppurative nodules, ascites, joint cavity effusion specimens may be found to cause disease bacteria.
X-ray chest radiograph showed a dense pituitary of the nodular lung, which was caused by the dissemination of sepsis. The flaky shadows distributed in the lung segment were caused by inhalation infection, and the extensive blurred lesions showed suppurative thrombosis.
Diagnosis
Diagnosis and diagnosis of Yersinia enterocolitica pneumonia
diagnosis
The diagnosis of pulmonary infection is based on the patient's history of inhaling or eating suspected contaminated food, clinical manifestations such as cough and shortness of breath, combined with X-ray findings and etiological diagnosis.
Differential diagnosis
Clinical should be differentiated from self-limited gastroenteritis and terminal ileal glandular inflammation.
