[CF Lung Disease - a German S3 Guideline: Pseudomonas aeruginosa]. / S3-Leitlinie: Lungenerkrankung bei Mukoviszidose ­ Pseudomonas aeruginosa.

Cystic Fibrosis (CF) is the most common autosomal recessive genetic multisystemic disease. In Germany, it affects at least 8000 people. The disease is caused by mutations in the Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) gene leading to dysfunction of CFTR, a transmembrane chloride channel. This defect causes insufficient hydration of the airway epithelial lining fluid which leads to reduction of the mucociliary clearance.Even if highly effective, CFTR modulator therapy has been available for some years and people with CF are getting much older than before, recurrent and chronic infections of the airways as well as pulmonary exacerbations still occur. In adult CF life, Pseudomonas aeruginosa (PA) is the most relevant pathogen in colonisation and chronic infection of the lung, leading to further loss of lung function. There are many possibilities to treat PA-infection.This is a S3-clinical guideline which implements a definition for chronic PA-infection and demonstrates evidence-based diagnostic methods and medical treatment in order to give guidance for individual treatment options.

Infection prevention and control in patients with cystic fibrosis (CF): Results from a survey in 35 German CF treatment centers.

This survey evaluates whether the Cystic Fibrosis (CF)-specific infection prevention and control (IPC) recommendations released by the Commission for Hospital Hygiene and Infection Prevention (KRINKO) in 2012 have been implemented in specialized German CF facilities. Of 35 participating centers (response rate 32.7%), 37% care for more than 100 patients and 44% treat mainly adults. Clinics for adult CF patients report a shortage of qualified personnel for intensified environmental cleaning. Some hospitals struggle to provide single patient rooms with an adjacent sanitary area to segregate CF patients strictly. Most centers offer at least one decolonization cycle (including systemic and inhalative antibiotics) to patients colonized with MRSA. In CF centers in Germany, the KRINKO IPC recommendations are considered helpful by the attending physicians and thoroughly implemented. There is room for improvement concerning strict segregation of inpatients with CF in single patient rooms, in particular in large CF centers mainly caring for adults.

Molecular and enzymatic characterisation of extra- and intracellular laccases from the acidophilic ascomycete Hortaea acidophila.

The pigmented ascomycete Hortaea acidophila is able to grow at a pH as low as 0.6 and produces laccases that are involved in melanin synthesis. We now present data on an extracellular and an intracellular laccase which exhibit a high stability at low pH. Furthermore, the optimum for enzyme acitivity is extraordinarily low with pH 1.5 for the intracellular laccase with 2,6-dimethoxyphenol (DMOP) as substrate. Two complete laccase gene sequences of H. acidophila were amplified by inverse polymerase chain reaction (PCR). Whereas the deduced protein laccase I contains an predicted N-terminal signal sequence for protein export, laccase II does not and thus may represent the intracellular laccase. The acidophilic character of both laccases seems to be reflected in their primary structure.

Characterization of microorganisms isolated from lignite excavated from the Záhorie coal mine (southwestern Slovakia).

Microorganisms were isolated from lignite freshly excavated in the Záhorie coal mine (southwestern Slovakia) under conditions excluding contamination with either soil or air-borne microorganisms. The isolates represented both Prokarya and Eukarya (fungi). All were able to grow on standard media, although some microorganisms were unstable and became extinct during storage of coal samples. Bacteria belonged to the genera Bacillus, Staphylococcus, and Rhodococcus, according to both morphological criteria and ITS sequences. Several bacterial isolates were resistant to antibiotics. The presence of anaerobic bacteria was also documented, although they have not yet been identified. Fungal isolates were typified by using their ITS sequences. They belonged to the genera Trichoderma (Hypocrea), Penicillium, Epicoccum, Metarhizium (Cordyceps), and Cladosporium. Several fungi produced compounds with antibiotic action against standard bacterial strains. The evidence for the presence of microorganisms in native lignite was obtained by means of fluorescence microscopy, scanning electron microscopy, and electron microprobe analysis. Results demonstrated that microorganisms were able to survive in the low-rank coal over a long time period.

Developmental changes in Trichoderma viride enzymes abundant in conidia and the light-induced conidiation signalling pathway.

The expression of glutamic acid decarboxylase gene and the laccase activity were measured during the development of surface-cultivated Trichoderma viride mycelia in order to examine their up-regulation by light. The results show that the changes in activity of GAD induced by light observed previously are caused by transcriptional regulation of gad gene expression in both submerged mycelia and aerial mycelia after photoinduction. The expression of tga gene encoding a T. viride G(alpha) protein was found not to be up-regulated by light and was also present in the non-conidiating mutant of T. viride suggesting that this protein is not involved in the regulation of conidiation in this fungus, or that it plays a role is in later stages of conidia development. The activity of laccase was also not light-inducible and may be related to the maturation of conidia.

Evidence for functional laccases in the acidophilic ascomycete Hortaea acidophila and isolation of laccase-specific gene fragments.

Hortaea acidophila is a pigmented, yeast-like ascomycete that is able to grow at a pH as low as 0.6. This study presents evidence that H. acidophila possesses at least two functional laccases that seem to be involved in melanin synthesis. This evidence is supported by PCR amplification of laccase-specific gene fragments by using primers derived from conserved copper-binding-regions and by Southern Blot analysis. Due to their low pH optimum the laccases may be of special interest for biotechnological use.

Hortaea acidophila, a new acid-tolerant black yeast from lignite.

A hitherto undescribed black yeast was isolated from an extract of brown coal containing humic and fulvic acids at pH 0.6. The fungus showed morphological similarity to some members of the genus Exophiala (Chaetothyriales) and of Hortaea (Dothideales). Based on SSU rDNA sequence similarity to meristematic members of the Dothideales, the new species was accommodated in Hortaea, which presently contains only a single, halophilic species, H. werneckii.