Recurrent aphthous stomatitis.

Recurrent aphthous stomatitis (RAS) is the most common clinical disease of the oral mucosa. Its prevalence in the general population varies between 5 and 25%, with its peak appearance in the second decade of life. So far, the etiopathogenesis is not clear.

[Pleural empyema due to Gemella spp: report of 12 cases].

Background: Gemella genus bacteria can produce localized or generalized severe infections, but very rarely they have been described as causing pulmonary infections or pleural empyemas.

Aim: To characterize patients with empyema caused by Gemella genus bacteria.

Material And Methods: The database of a Microbiology laboratory of a Spanish hospital was reviewed, searching for Gemella positive cultures of pleural effusions in a period of five years.