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Bacteroides pyogenes isolated from appendiceal abscess in a patient without animal contact.

ABSTRACT: Bacteroides pyogenes is a member of the oral flora of cats and dogs. We report a case of B. pyogenes isolated from an appendiceal abscess in a patient without a history of animal contact. This species was identified by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) and sequencing of 16S rRNA, rpoB, gyrB and hsp60 genes.

SUBMITTER: Takahashi J

PROVIDER: S-EPMC8488308 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:BackgroundThe aim of our prospective study is to compare and analyze the results of two treatment methods of appendiceal mass and abscess: emergency surgery and conservative treatment with and without interval surgery.Materials and methods74 Patients with the diagnosis of appendiceal mass or abscess were enrolled in this study. The patients were assigned into two groups: the emergency surgery group and the conservative management group. The conservative management group was subdivided into two groups: interval surgery group and the ambulatory follow-up observation group without interval surgery. Several clinical characteristics were determined and compared between the groups. Among patients who underwent surgery, the surgical methods, operation time, postoperative hospitalization period, and post-surgical complications were analyzed. In the ambulatory follow-up observation group, recurrence of appendicitis was assessed.ResultsComparison of the emergency surgery group and interval surgery group revealed that the interval surgery group was characterized by shorter operation time (P = 0.008), a smallernumber of postoperative complications (P = 0.02) and also shorter postoperative hospital stay (P = 0.009). In the ambulatory follow-up observation group, recurrence of appendicitis developed in 3 (13%) patients. US or CT-guided PCD was performed in all 3 patients on the conservative treatment stage. Comparing the interval surgery and recurrent appendicitis groups revealed statistically significant difference: operation time (P = 0.04) as well as postoperative hospital stay (P = 0.04) were shorter in recurrent appendicitis group. In 3 (4.1%) patients, the cause of the appendiceal mass was caecal cancer (2 cases) and Crohn's disease.ConclusionConservative treatment without interval surgery seems to be the preferred method for treatment of appendiceal mass and abscess. Patients can be operated on only in case of recurrence of appendicitis. US or CT PCD of appendiceal abscess presents the risk-factor for the development of recurrence of appendicitis. CT and colonoscopy within 4-6 weeks after completing the conservative treatment is recommended to be performed in all patients.

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Bacteroides pyogenes isolated from appendiceal abscess in a patient without animal contact.

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