Background The medical care for nursing home residents is estimated to be partly inadequate in Germany. The aim of this study is to investigate the needs and utilization of general practitioners (GPs), medical specialists and allied health professionals. Methods A survey was sent to a nationwide random sample of 1069 nursing homes in Germany in January 2019. Nursing staff managers were asked about medical care. Regular nursing home visits by medical specialists and allied health professionals were defined as at least one contact per year to at least one nursing home resident. Results A total of 486 persons responded (45.5%). On average, nursing homes have contact to 8.6 (interquartile range: 4–10) different GPs. Almost 70% of respondents agreed that residents’ medical care should be coordinated by GPs. However, only 46.0% stated that specialist treatment should require GP referral. A high need was seen for care from physiotherapists (91.0%), neurologists or psychiatrists (89.3%), dentists (73.7%), and urologists (71.3%). Regarding the actual utilization of medical specialists and health professionals, most nursing homes have regular contact to physiotherapists (97.1%), psychiatrists or neurologists (90.4%), speech therapists (85.0%), and dentists (84.8%). Remarkable discrepancies between need and utilization were found for urologists and ophthalmologists. Conclusion There is large variance in the number of GPs per nursing home, and needs for medical specialists, especially urologists and ophthalmologists, seem unmet. Interprofessional collaboration between GPs, medical specialists and allied health professionals should be improved, and GPs should play a more coordinating role.

The hybrid sensory histidine kinase Slr1759 of the cyanobacterium Synechocystis sp. strain PCC 6803 contains multiple sensory domains and a multi-step phosphorelay system. Immuno blot analysis provided evidence that the histidine kinase Slr1759 is associated with the cytoplasmic membrane. The gene slr1759 is part of an operon together with slr1760, encoding a response regulator. A comparative investigation was performed on Synechocystis sp. strain PCC 6803 wild type (WT) and an insertionally inactivated slr1759-mutant (Hik14) which also lacks the transcript for the response regulator Slr1760. The mutant Hik14 grew significantly slower than WT in the early growth phase, when both were inoculated with a low cell density into BG11 medium without additional buffer and when aerated with air enriched with 2% CO 2 . Since the aeration with CO 2 -enriched air results in a decrease of the pH value in the medium, the growth experiments indicated that Hik14 is not able to adjust its metabolic activities as rapidly as WT to compensate for a larger decrease of the pH value in the medium. No significant differences in growth between Hik14 and WT were observed when cells were inoculated with a higher cell density in BG11 medium or when the BG11 medium contained 50 mm Epps-NaOH, pH 7.5, to prevent the pH drop. This Hik14 phenotype has so far only been seen under the above defined growth condition. Results of photosynthetic activity measurements as well as Northern blot-, immuno blot-, and metabolite analyses suggest that the two-component system Slr1759/Slr1760 has a function in the coordination of several metabolic activities which is in good agreement with the complex domain structure of Slr1759. The direct targets of this two-component system have so far not been identified.

The cyanobacterium Synechocystis sp. PCC 6803 harbours 47 histidine kinases (Hiks). Among these are hybrid histidine kinases with one or two response regulator domains as well as numerous Hiks with several sensory domains. One example is the hybrid histidine kinase Slr1759 (Hik14) that has two PAS domains arranged in tandem linked to a predicted GAF domain. Here, we show that a Slr1759 derivative recombinantly expressed in Escherichia coli has a Xavin cofactor. Using truncated Slr1759 variants, it is shown that the Xavin associates with the Wrst PAS domain. The cofactor reconstitutes the activity of Damino acid oxidase apoprotein from pig kidney, indicating that the Xavin derivative is FAD. Furthermore, the Slr1759 histidine kinase domain indeed undergoes autophosphorylation in vitro. The phosphorylated product of a recombinant Slr1759 derivative is sensitive to acids, pointing to a histidine residue as the phosphate-accepting group.