The oral cavity is not a primary source for implantable pacemaker or cardioverter defibrillator infections.

Background: To test the hypothesis that the oral cavity is a potential source for implantable pacemaker and cardioverter defibrillators infections, the bacterial diversity on explanted rhythm heart management devices was investigated and compared to the oral microbiome.

Methods: A metagenomic approach was used to analyze the bacterial diversity on the surfaces of non-infected and infected pacemakers. The DNA from surfaces swaps of 24 non-infected and 23 infected pacemaker were isolated and subjected to bacterial-specific DNA amplification, single strand conformation polymorphism- (SSCP) and sequencing analysis.

[Effects of hyperbaric oxygen on fresh burn wounds].

In an experimental study standardized third-degree burns were caused in guinea pigs. The animals were treated intermittently with hyperbaric oxygen for a period of five days starting immediately after injury. The healing process was recorded at frequent intervals using a photographic technique and planimetric determinations.

Cell lines of human germinal cancer.

Three new established human germ cell tumour lines, H 12.1, H 12.5 and H 12.

Some remarks on the genesis of the so-called branchiogenous carcinoma.

Nine patients suffering from supposed branchiogenous carcinomas were observed within 8 years. In six of them later on a further tumour developed: four times in the tonsils and twice in the glossopharyngeal region and three of these patients additionally in the contralateral side-region of the neck. Histopathology revealed squamous carcinoma of a pseudocystic type; no pre-existing epithelium of a cyst or fistula within these tumours was to be seen.