title: Impact of preoperative dental plaque culture for predicting postoperative pneumonia in esophageal cancer patients.
abstract: OBJECTIVE
  In esophageal cancer patients, postoperative pneumonia frequently occurs. In the oral cavity, dental plaque is a major reservoir of bacteria, and it is possible that oral bacteria are aspirated into the upper respiratory tract after esophagectomy. We evaluated the interaction between preoperative dental plaque and postoperative pneumonia in patients undergoing esophagectomy.
  
  
  METHODS
  Thirty-nine patients with thoracic esophageal cancer who underwent esophagectomy were investigated. Preoperatively, dental plaque was collected and the bacterial flora investigated. If postoperative pneumonia occurred, the sputum was harvested and the pathogens were evaluated.
  
  
  RESULTS
  Postoperative pneumonia was observed in 14 patients (35.9%): 5 (71.4%) of 7 patients in the pathogen-positive group and 9 (28.1%) of 32 patients in the pathogen-negative group. In 2 (40.0%) of 5 patients with postoperative pneumonia, who had pathogenic bacteria in the preoperative dental plaque, the same pathogenic bacteria were also identified in the postoperative sputum.
  
  
  CONCLUSIONS
  Pathogens in preoperative dental plaque are risk factors for postoperative pneumonia following thoracotomy in patients with thoracic esophageal cancer.
authors: Department of Frontier Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan. yakutsu@faculty.chiba-u.jp
authors: Yasunori
authors: Y
authors: Akutsu
authors: Hisahiro
authors: H
authors: Matsubara
authors: Shinichi
authors: S
authors: Okazumi
authors: Hideaki
authors: H
authors: Shimada
authors: Kiyohiko
authors: K
authors: Shuto
authors: Toru
authors: T
authors: Shiratori
authors: Takenori
authors: T
authors: Ochiai
mesh_terms: D000328:Adult; D000368:Aged; D001431:Bacteriological Techniques; D003773:Dental Plaque / Q000382:microbiology*; D004938:Esophageal Neoplasms / Q000150:complications* / Q000601:surgery; D016629:Esophagectomy; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011014:Pneumonia / Q000209:etiology*; D011183:Postoperative Complications; D012307:Risk Factors; D013183:Sputum / Q000382:microbiology; D013908:Thoracotomy