Staphylococcus aureus pneumonia

What is Staphylococcus »

Staphylococcus for Gram stain positive cocci, Staphylococcus aureus and Staphylococcus epidermidis two categories. The former can cause systemic disease multiple purulent, plasma coagulation enzyme that bacteria produce around fibrin, the protection of bacteria will not be swallowed. Coagulase-negative pathogenic Staphylococcus duality can be.

Staphylococcus aureus pneumonia diagnosis

Kechu found in the sputum of patients with Staphylococcus aureus can be suspected of the disease, the diagnosis from blood culture, empyema Nongye or trachea, or chest extracts found in Staphylococcus aureus. Staphylococcus aureus and Streptococcus pneumoniae different , More training, so rare false negative. The most common X-ray abnormality for bronchial pneumonia with or without abscess formation or pleural effusion; large leaf of change is rare. Pulmonary airbag strong tips for staph infections . Embolization of Staphylococcus aureus pneumonia is not the characteristics of the site adjacent multiple infiltration, infiltration easy to create empty, the phenomenon that causes blood vessels from within (such as the right of endocarditis or septic Thrombophlebitis) .

Auxiliary inspection

Lung X-ray showed that the lung or lobe of real change, or were infiltrating lobular kind, including single or multiple of the balloon cavity. X-ray shadow of the volatility of the grapes is another important feature of pneumonia.

According to Du Xue systemic symptoms, coughing, Nongxue sputum, blood cell counts increased (up to 50 × 109 / L, increase the proportion of neutrophils, and the left toxic nuclear particles, X-ray shadow of patchy performance with empty and liquid Ping has to make a preliminary diagnosis. Diagnosis depends on the positive sputum culture. Coagulase-positive bacteria pathogens strong. Infant patients with positive blood culture opportunities than adults多见. Cell wall acid is found in the outer layer of a Staphylococcus aureus Phosphorus complex polymer, can stimulate the body to produce antibodies, the cell wall of acid antibodies to pathogen diagnosis

Symptoms and signs

Onset of the disease more Jizhou, a high fever, chills, chest pain, sputum for Nongxing, volume, with Blood-streaked phlegm or a pink emulsion. Staphylococcus aureus pneumonia despite the swift, powerful, but some condition is not serious, individual course relatively slow, and sometimes chronic pneumonia or chronic lung abscess. Clinical symptoms and pneumococcal pneumonia symptoms similar.
Staphylococcus aureus pneumonia is characterized by repeated easily lead to shiver, tissue necrosis with lung abscess formation and cysts (mostly found in infants and young children); acute illness and there is obvious failure. Empyema more common. Staphylococcus aureus mainly exists in the open after the thorax Empyema of the chest wall or the use of post-traumatic thoracic drainage of blood in the empyema.

Susceptible population

Staphylococcus aureus pneumonia community-acquired pneumonia about 2% of hospital-acquired pneumonia and 10% to 15% following this pneumonia in vulnerable patients: infants and the elderly; inpatients and severe physical weakness, in particular, Tracheotomy, tracheal intubation, immune suppression, or did the recent surgery patients suffering from cystic fibrosis or granulomatous disease of children and youth; viral pneumonia, especially A and influenza B after bacteria Repeat of the infected patients intravenous drug use and easy for Staphylococcus tricuspid endocarditis embolization with pneumonia patients.

Staphylococcus prognosis and treatment of pneumonia

General mortality rate of 30% to 40% resulting in death in part because the majority of patients with serious complications. However, some adults have been very healthy, but this had pneumonia after the flu, the illness rapid development, finally leading to death. Efficacy of antibiotics slow, long recovery.

Most of Staphylococcus aureus produce penicillin enzyme, for methicillin-resistant and the resistance is increasing. Advocated in a general resistance to penicillin of the penicillin (such as oxacillin or nafcillin 2 g, intravenous injection, every four to six hours 1. Is another major drug cephalosporin: commonly used for cefalotin or cephalosporins Bangladesh more than 2 g, intravenous injection, every four to six hours a time, cefazolin 0.5 ~ 1.0 g, intravenous injection, Every eight hours one or cefuroxime 750 mg, intravenous injection, every six to eight hours a meeting. Third-generation cephalosporins as the effect of the first generation or second-generation agents. Lin lincomycin 600 mg intravenous injection, every 6 to 8 hours 1 90% to 95% effective strain.

Generally believed that the methicillin-resistant strains resistant to all β-lactam antibiotics are resistant in many hospitals, such strains of hospital-acquired staph 30% to 40%, and the only communities Infections of 5%. If the suspected or in vitro sensitivity test proved resistant to methicillin-resistant, the general use of vancomycin. Commonly used dose of 1 g intravenous injection, every 12 hours, 1; renal failure at the appropriate dosage adjustments.