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Objective: To summarize the clinical manifestations and treatment of patients with deep neck infection with descending mediastinal infection. Methods: The clinical data of 12 patients with deep neck infection with descending mediastinal infection were reviewed. The clinical manifestations, infection origin, bacterial culture results, related systemic diseases, surgical drainage methods and treatment results were analyzed. Results: The typical clinical features of descending mediastinal infection were chest pain and subcutaneous crackling, diagnosis can confirmed by CT scan detected gas and abscess in the neck and mediastinal space. The main origin of infection was pharyngeal infection, followed by odontogenic infection. Systemic diseases were mainly diabetes mellitus. The positive rate of purulent secretion culture was 58.3%（7/12）, streptococcus account for the highest proportion. Surgical treatment included 9 patients undergoing neck surgery alone and 3 patients undergoing combined neck and chest surgery. Chest drainage was performed by thoracic surgery through mediastinoscopy or thoracoscopic surgery or B-ultrasound guided puncture, and no patient underwent open surgery. Ten patients were cured and two died, with a mortality rate of 16.7%. Conclusion: The deep neck infection with descending mediastinal infection has no specificity in the early stage. Timely abscess drainage, effective airway protection, antimicrobial therapy, and management of potentially life-threatening complications such as sepsis, mediastinitis, and pneumonia are the key to successful treatment., Competing Interests: The authors of this article and the planning committee members and staff have no relevant financial relationships with commercial interests to disclose., (Copyright© by the Editorial Department of Journal of Clinical Otorhinolaryngology Head and Neck Surgery.)

Objective: To identify the pathogenic bacteria of CPSF and their resistance to antibiotics,and guide the rational use of antibiotics therapy. Method: One hundred and thirty cases of deep neck infection whose imaging finding depicted patients with suspected as CPSF were enrolled in the study from January 2010 to June 2017.Specimens were collected from abscesses or other inflammatory lesions from all patients through a small incision or the external orifice on the skin of the neck. Result: A total of 108 strains of pathogens have been isolated from 88 patients (positive rate: 67.7%), among which the gram-positive bacteria accounted for 56.5%, gram-negative bacteria accounted for 43.5%. Streptococcus and Staphylococcus aureus (22.2%) were the most common pathogens among young patients (≤14 years old) (17.7%);Klebsiellapneumoniae (15.7%) were the most common pathogens among the patients over 14 years old. Separation of pathogenic bacteria have maintained a low resistance to most antibiotics. G+ bacteria is totally sensitive to quinupristin/dalfopristin and vancomycin; G-bacteria is totally sensitive to cefoperazone/Batan, piperacillin/tazobactam,imipenem. Conclusion: Most of pathogens come from upper respiratory tract in CPSF cases, and are mostly sensitive to βlactamase., Competing Interests: The authors of this article and the planning committee members and staff have no relevant financial relationships with commercial interests to disclose., (Copyright© by the Editorial Department of Journal of Clinical Otorhinolaryngology Head and Neck Surgery.)