The periapical microbiota of 36 teeth with refractory apical periodontitis was investigated. None of the teeth had responded to conventional endodontic or long-term (> 6 months), calcium-hydroxide treatment. Eight patients had received antibiotics systemically. After anaerobic culture, a total of 148 microbial strains were detected among 67 microbial species. One of the 36 lesions was culture-n...

Background. Empyema necessitans, a rare complication of pleural effusion, could result in significant morbidity and mortality in children. It is characterized by the dissection of pus through the soft tissues and the skin of the chest wall. Mycobacterium tuberculosis and Actinomyces israelii are common causes but Gram negative bacilli could be a rare cause. However, there were challenges in dif...

Actinomycosis is a chronic suppurative and granulomatous disease usually caused by Actinomyces israelii. The pathogen produces a characteristic granulomatous inflammatory fibrosis and mass lesion. Abdominal actinomycosis is often difficult to diagnose before operation because of its rarity and chronic disease progression without any characteristic clinical features. In particular, pancreas is v...

The effects of sealing infected carious dentine below dental restorations on the phenotypic and genotypic diversity of the surviving microbiota was investigated. It was hypothesized that the microbiota would be subject to nutrient limitation or nutrient simplification, as it would no longer have access to dietary components or salivary secretion for growth. The available nutrients would be limi...

BACKGROUND, AIMS The purpose of the present study was to compare and relate the microbial composition of supra and subgingival plaque in 23 adult periodontitis subjects (mean age 51 +/- 14 years). METHODS A total of 1,170 samples of supra and subgingival plaque were collected from the mesial aspect of every tooth (up to 28 supra and 28 subgingival samples) from each subject and evaluated for ...

Les manifestations dermatologiques de l’actinomycose sont classiques, le plus souvent dues à Actinomyces israelii. Dans la plupart des cas décrits, ces lésions cutanées apparaissent proximité du foyer profond primitif, par un mécanisme d’extension locale, et dans région cervicofaciale. L’existence distance voie hématogène, est rare, presque toujours A. Nous rapportons original d’une actinomycos...