Southeast Norway Research Articles

Reproductive Performance, Udder Health, and Antibiotic Resistance in Mastitis Bacteria isolated from Norwegian Red cows in Conventional and Organic Farming

BackgroundThe objectives of this study were to investigate whether there were differences between Norwegian Red cows in conventional and organic farming with respect to reproductive performance, udder health, and antibiotic resistance in udder pathogens.MethodsTwenty-five conventional and 24 organic herds from south-east and middle Norway participated in the study. Herds were matched such that geographical location, herd size, and barn types were similar across the cohorts. All organic herds were certified as organic between 1997 and 2003. All herds were members of the Norwegian Dairy Herd Recording System. The herds were visited once during the study. The relationship between the outcomes and explanatory variables were assessed using mixed linear models.ResultsThere were less > 2nd parity cows in conventional farming. The conventional cows had higher milk yields and received more concentrates than organic cows. Although after adjustment for milk yield and parity, somatic cell count was lower in organic cows than conventional cows. There was a higher proportion of quarters that were dried off at the herd visit in organic herds. No differences in the interval to first AI, interval to last AI or calving interval was revealed between organic and conventional cows. There was no difference between conventional and organic cows in quarter samples positive for mastitis bacteria from the herd visit. Milk yield and parity were associated with the likelihood of at least one quarter positive for mastitis bacteria. There was few S. aureus isolates resistance to penicillin in both management systems. Penicillin resistance against Coagulase negative staphylococci isolated from subclinically infected quarters was 48.5% in conventional herds and 46.5% in organic herds.ConclusionThere were no large differences between reproductive performance and udder health between conventional and organic farming for Norwegian Red cows.

Wide-area power oscillation damping control in Nordic equivalent system

A study is presented on power oscillation damping (POD) control using wide area measurements applied to a single static var compensator (SVC). An equivalent power system model representing key characteristics of the Nordic power system is used. Feedback signals from remote phasor measurement units (PMUs) in Norway and Finland are used to damp the critical inter-area modes through a large SVC unit located in south-east Norway. A comparison between two control design approaches: (i) model-based POD (MBPOD) - dependant on accurate system model and (ii) indirect adaptive POD (IAPOD) - which relies only on measurements - is made. For MBPOD an optimisation approach is used to obtain the parameters of the controller while the IAPOD is based on online Kalman filter estimation and adaptive pole-shifting control. It is shown that the IAPOD yields almost similar performance as the MBPOD with very little prior information about the system. The performance comparison is verified for several tie-line outages.

The Roman Age Hall and the Warrior-Aristocracy: Reflections upon the Hall at Missingen, South-East Norway

This paper discusses possible functions for an Early Roman Age hall (c. ad 1–200) at Missingen, Østfold, south-east Norway. The hall represents one of the earliest known halls in Scandinavia. Its existence corresponds with the introduction of the Roman Age warrior-aristocracy. No status goods were recorded from the hall or the site. The assemblage of artefacts, plant macrofossils, together with the site's layout, points to Missingen as a farm with traditional farm functions. However, the farm's great size and well-considered location in combination with the presence of the hall has led to the conclusion that Missingen represents a chieftain's farm. It is argued that the farm could have served as a resort or camp for a group of warriors, led by a chieftain or a military leader belonging to a warrior-aristocracy. The existence of a Roman Age aristocracy in Østfold, hitherto represented by graves with weapons and rich imported goods, is for the first time evidenced by a hall and a chieftain's farm.

Pore-pressure response in a marine clay slope in southeast Norway

This paper presents 9 years of measured pore pressures from eight piezometers installed in a marine clay slope in southeast Norway and the results of a two-dimensional finite element (FE) analysis performed to evaluate infiltration effects on groundwater flow and pore-pressure response. The assumed time-varying boundary flux record used in the analysis to simulate infiltration considers the effects of temperature, snow depth, land-use practices, and soil hydraulic conductivity. The pore-pressure records and analyses show that: (i) the maximum pore pressure reached is nearly the same each year; (ii) this maximum corresponds to a groundwater surface at or near the ground surface; (iii) the two-dimensional groundwater model used for the analysis is adequate for understanding of factors affecting infiltration, seepage patterns, and pore-pressure variations; and (iv) it is difficult to precisely model all aspects of the observed pore-pressure variations.

Ural OwlsStrix uralensisat the Border Line: Nesting Places are Not a Limiting Factor

The Ural Owl Strix uralensis meets its westernmost distribution in Hedmark County, southeast Norway. Since 1979 we have provided the species with nest boxes in this region. A total of 80 nest boxes were put out in prime Ural Owl habitat, starting with 9 in 1979, 18 in 1982 and 53 in 1985. Two more nest boxes put up by others, and four made by ourselves, were later added, giving a total 86 nest-box localities. The nest boxes were checked up to 2004, when 28 nest boxes were moved to western (n = 8) and central (n = 20) Sweden. We have analysed the results for 25 seasons from 1980 to 2004. For comparison, the results for the 20 nest boxes in central Sweden for the seasons 2005–07 have been included. The Norwegian nest boxes offered a total of 1429 nest-box years. Since all boxes were not inspected each year, the total number of observation-years was 847 (59.3%). Ural Owls only used 4 nest boxes for breeding, occupied for the first time 1, 1, 1 and 10 years respectively after the boxes were put up. The four b...

The prevalence of Anaplasma phagocytophilum in host-seeking Ixodes ricinus ticks in Norway

In recent years, cases of human granulocytic anaplasmosis (HGA), as well as presence of A. phagocytophilum in ticks and various vertebrate hosts, have been reported throughout Europe. In Norway, tick-borne fever caused by A. phagocytophilum has been recorded in moose, red deer, roe deer and sheep [1], as well as in humans [2]. The prevalence of A. phagocytophilum in I. ricinus ticks is important for risk assessment of HGA. In this study, we present the prevalence of A. phagocytophilum in host-seeking I. ricinus ticks collected during a 2-year period from 18 locations situated from northwest to southeast Norway.

Comparison of two methods for assessment of aggregate stability of agricultural soils in southeast Norway

Soil aggregate stability is a crucial property regarding soil erodibility. However, results from different stability-assessment methods differ. The objective of this study was to compare two such methods on a set of southeast Norwegian agricultural soils. Traditionally, a raindrop-impact method has been used to determine the soil aggregate stability of Norwegian soils. Here, a more common, less destructive method was also used, a wet-sieve method using one sieve. Two soil fractions were studied, aggregates of 0.6–2 mm and 2–6 mm in diameter. The soil samples were chosen to give a wide range in clay content (5.7–68.0%) and soil organic matter (1.7–8.5% SOM). Using the wet-sieve method two different pre-treatments were performed; either using air-dried aggregates or slowly pre-wetted, air-dried aggregates. The aggregate stability found using the wet-sieve method gave generally higher stability values for soil aggregates 2–6 mm in diameter than using the standard raindrop-impact method (21% higher on average). Soils with high contents of silt and very fine sand (0.002–0.2 mm), however, were found to be more susceptible to destruction due to raindrop impact than to wet-sieving. Hence, using the wet-sieve method, the silty soils were ranked as more stable than by using the standard raindrop-impact method. Aggregate stability was positively correlated with the SOM and Al-oxides content and negatively correlated with the silt and the very fine sand content (0.002–0.02 mm). Using slowly, pre-wetted air-dried aggregates, which induce rebonding and reduce the effect of slaking, resulted in distinctively higher stability values than using air-dried aggregates in the wet-sieving method (34% higher on average). The wet-sieve method is less laborious and more widely used elsewhere, but the lower disruptive effect on silty soils should be kept in mind when using this method.

A Population-based Study of Spinal Metastatic Disease in South-East Norway

Aims Spinal metastatic disease (SMD) is a serious complication of cancer. To our knowledge, only one population-based study of metastatic spinal cord compression (MSCC) has been carried out. The purpose of the present study was to describe population-based incidences of SMD that required local treatment, such as radiotherapy, surgery or vertebroplasty, including patients with or without cord compression, and to characterise the neurological status of these patients. Materials and methods During 18 months, all patients with SMD who received local treatment in the South-Eastern Health Region of Norway (population 2.6 million inhabitants) were identified and their medical records were reviewed. Results In total, 1002 patients were included; 83% had multiple lesions in the spine; 39% had SMD at the time of the primary cancer diagnosis. At the start of local treatment, 31% had MSCC and 11% were not able to walk. The prevalence of MSCC at the time of cancer diagnosis was 0.36%. The annual incidences per 100 000 inhabitants were 26.0 for SMD and 8.1 for MSCC. Conclusion Population-based incidences of SMD requiring local treatment have been reported for the first time. The prevalence of MSCC at the time of cancer diagnosis was higher than previously reported. A more precise definition of MSCC and more population-based studies are needed to reduce selection bias when comparing different studies.

Influence of terrain model smoothing and flight and sensor configurations on detection of small pioneer trees in the boreal–alpine transition zone utilizing height metrics derived from airborne scanning lasers

It has been suggested that airborne laser scanning (ALS) with high point densities could be used to monitor changes in the alpine tree line. The overall goal of this study was to assess the influence of ALS sensor and flight configurations on the ability to detect small trees in the alpine tree line and on the estimation of their heights. The study was conducted in a sub-alpine/alpine environment in southeast Norway. 342 small trees (0.11–5.20 m tall) of Norway spruce, Scots pine, and downy birch were precisely georeferenced and measured in field. ALS data acquired with two different instruments and at different flying altitudes (700–1130 m a.g.l.) with different pulse repetition frequencies (100, 125, and 166 kHz) were collected with a point density of all echoes of 7.7–11.0 m − 2 . For each acquisition, three different terrain models were used to process the ALS point clouds in order to assess the effects of different preprocessing parameters on the ability to detect small trees. Regardless of acquisition and terrain model, positive height values were found for 91% of the taller trees (> 1 m). For smaller trees (< 1 m), 29–61% of the trees displayed positive height values. For the lowest repetition frequencies (100 and 125 kHz) in particular, the portion of trees with positive laser height values increased significantly with increasing terrain smoothing. For the highest repetition frequency there were no differences between smoothing levels, likely because of large ALS measurement errors at low laser pulse energy levels causing a large portion of the laser echoes to be discarded during terrain modeling. Error analysis revealed large commission errors when detecting small trees. The commissions consisted of objects like terrain structures, rocks, and hummocks having positive height values. The magnitude of commissions ranged from 709 to 8948% of the true tree numbers and tended to increase with increasing levels of terrain smoothing and with acquisitions according to increasing point densities. The accuracy of tree height derived from the ALS data indicated a systematic underestimation of true tree height by 0.35 to 1.47 m, depending on acquisition, terrain model, and tree species. The underestimation also increased with increasing tree height. The standard deviation for the differences between laser-derived and field-measured tree heights was 0.16–0.57 m. Because there are significant effects of sensor and flight configurations on tree height estimation, field calibration of tree heights at each point of time is required when using airborne lasers for tree growth monitoring.

Recent yield results and trends over time with conservation tillage on clay loam and silt loam soils in southeast Norway

Yields are reported from four long-term (16–30 years) tillage trials, comparing results since 1998, under relatively wet conditions, with earlier experience. In trial 1, on clay loam, mean grain yield with spring harrowing only, has since 1998 been 87% of that obtained with autumn ploughing, whereas it was 94% for the whole period since 1991. The inclusion of autumn harrowing increased these figures to 94 and 98%, respectively. Over the last six years, spring ploughing gave 5% lower yield than did autumn ploughing. Relative yields of unploughed versus ploughed treatments were negatively correlated with summer rainfall. Grain protein was lowest with spring harrowing only. In trial 2, on clay loam, direct drilling has since 1998, as in previous years, given around 10% lower yield than has autumn ploughing. Autumn harrowing gave 4% lower yield in winter wheat and 6% higher yield in spring oats than did autumn ploughing, whilst yields of spring turnip rape were not significantly affected by tillage. In trial 3, also on clay loam, six alternative straw treatments were compared under four unploughed tillage regimes. Relative to straw removal, retaining large residue amounts depressed yields hardly at all with autumn and spring harrowing, but by 7% with spring harrowing only and by 13% with direct drilling. Overall, direct drilling gave 18% lower yields in this trial than did autumn and spring harrowing, whilst the yield reduction with spring harrowing only was 7%. In trial 4, on silt loam, both spring harrowing only and direct drilling have since 1998 given 6% lower yield than has autumn ploughing, whereas autumn and spring harrowing has given 6% higher yield. Under drier conditions during 1991–1997, autumn ploughing gave up to 11% lower yield than did unploughed treatments. Straw retention was beneficial in the absence of ploughing during that period, but has had little effect in more recent years.

Ataxia with vitamin E deficiency in southeast Norway, case report

Ataxia with vitamin E deficiency (AVED) is a rare cause of hereditary ataxia in north European countries with unknown prevalence. Few cases are reported from these countries. Through a systematic population based study of hereditary ataxia in southeast Norway subjects were classified and investigated. To report a subject with ataxia due to vitamin E deficiency in Norway. One patient with AVED was identified. The subject was a 45 years old woman with progressive ataxia from preschool age. When she was 12 years old Friedreich's ataxia was diagnosed after neurological examination. At the age of 45 re-evaluation and re-examination was performed and genetic analysis of the Frataxin gene was negative. At that time she had truncal and extremities ataxia, titubation of the head, pes cavus, inverted plantar response, loss of proprioceptive and vibration sense and a severe sensory neuropathy. Vitamin E in serum was undetectable and genetic analysis detected a compound heterozygous mutation, p.A120T and p.R134X, in the alpha-tocopherol transport protein gene on chromosome 8q13. Vitamin E should always be assessed in progressive ataxia of genetic or unexplained causes and especially with a Friedreich's ataxia-like phenotype since treatment is available. AVED is rare in Norway, but exists, and we here report the first genetically confirmed subject with ataxia due to vitamin E deficiency in Norway.

Effects of surfactant use and peat amendment on leaching of fungicides and nitrate from golf greens

AbstractSoil water repellency in golf putting greens may induce preferential “finger flow”, leading to enhanced leaching of surface applied agrochemicals such as fungicides and nitrate. We examined the effects of root zone composition and the use of the non-ionic surfactant Revolution on soil water repellency, soil water content distributions, infiltration rates, turf quality, and fungicide and nitrate leaching from April 2007 to April 2008. The study was made on 4-year-old experimental green seeded with creeping bentgrass (Agrostis stolonifera L.) ‘Penn A-4’ at Landvik in southeast Norway. Eight lysimeters with two different root zone materials: (i) straight sand (1% gravel, 96% sand, 3% silt and clay, and 4 g kg−1 organic matter) (SS) and (ii) straight sand mixed with Sphagnum peat to an organic matter content of 25 g kg−1 (SP) were used in this study. Surfactant treatment reduced the spatial variability of water contents, increased infiltration rates and reduced water drop penetration times (WDPTs) by on average 99% in and just below the thatch layer. These effects were most evident for SS lysimeters. Surfactant treatment resulted on average in an 80% reduction of total fungicide leaching, presumably due to reduced preferential finger flow facilitated by decreased soil water repellency. Peat amendment reduced fungicide leaching by 90%, probably due to increased sorption of the fungicides to organic matter. Nitrate leaching was also smaller from surfactant-treated straight-sand root zones, but this effect was not significant.

Is Covert Medication in Norwegian Nursing Homes Still a Problem?

The practice of hiding medicines in nursing home patients' food or beverages is described in only a few scientific papers. An earlier study conducted in 1999/2000 showed that covert medication was common in Norwegian nursing homes, with 11% of patients in regular nursing home units (RUs) and 17% of those in special care units for patients with dementia (SCUs) receiving at least one covert medication during the last 7 days. However, that study included few details about the medications involved. Therefore, we designed a study to obtain more detailed information about the practice of covert medication. The objectives of the study were to describe how widespread the practice is, identify the reasons for giving the medicine in disguise, determine what kinds of medicine are given in disguise, and establish who makes the decision about covert medication. We collected data on 1,943 patients (623 in SCUs and 1,320 in RUs) in southeast Norway between October 2006 and February 2007. The information collected included what kind of drugs the patients received, what form the drugs were administered in and how the drugs were given. Patient characteristics such as age, sex, the patient's level of function in terms of activities of daily living (ADL), mental capacity and behavioural and psychological symptoms were also recorded. Ward characteristics such as the type of ward, the number of beds in the ward and the number of carers working on each shift were also documented. Descriptive statistics of the distribution of covert medication were obtained and the findings from SCUs and RUs were compared. The same approach was taken regarding information relating to who took the decision and how the practice was documented. A multilevel logistic regression analysis was performed to examine which patient and ward characteristics were associated with covert medication. Each patient was given on average 6.5 different medications on a regular basis every day. Nearly a quarter (23.5%) of patients who received medications had drugs mixed in food or beverages. Fourteen percent of the patients in SCUs and nearly 10% of the patients in RUs received medicine blended in food or beverages without their knowledge (covert medication). Compared with patients who were treated openly, a significantly higher proportion of patients who were treated covertly received antipsychotics (20% vs 30%, respectively; p < 0.001). In most cases, the decision to administer covert medication was made by the staff together with the physician or by the physician alone (61.4% of occasions in SCUs and 52.8% in RUs). About two-thirds of cases of covert medication had been documented to some extent in the patients' records. Low mental capacity, low ADL function and the presence of agitation and learning disability were associated with covert medication. Of the ward characteristics, only staying in SCUs was associated with covert medication. Our study presents evidence suggesting that the practice of covert medication may still be a problem in Norwegian nursing homes. The frequency of this practice has been only slightly reduced in the period 2000-7, but the practice is more frequently recorded in the patient's records and the physician is today more often involved in the decision to give medicine covertly compared with 7 years ago.

Mapping insect defoliation in Scots pine with MODIS time-series data

Insect damage is a general problem that disturbs the growth of forests, causing economic losses and affecting carbon sequestration. Coarse-resolution data from satellites are potentially useful for national and regional mapping of forest damage, but the accuracy of these methods has not been fully examined. In this study, a method was tested for the mapping of defoliation in Scots pine [ Pinus silvestris] forests in southeast Norway caused by the pine sawfly [ Neodiprion sertifer], with the use of multi-temporal MODIS 16-day composite vegetation index data and the TIMESAT processing method. The damage mapping method used differences in summer mean values and angles of the seasonal profiles, indicating decreasing foliage density, to identify pixels that represent areas containing forest damage. In addition to 16-day NDVI the Wide Dynamic Range Vegetation Index (WDRVI) was tested. Damage areas were identified by classifying data into pixels representing damaged versus undamaged forest areas using a boolean combination of thresholded parameters. Classification results were evaluated against the change in LAI estimated from airplane LIDAR measurements, as an indicator of defoliation. The damage classifications detected 71% to 82% of the pixels with damage, and had kappa coefficients varying between 0.48 and 0.63, indicating some overestimation. This was due e.g. to failure to include clear-cut areas in the evaluation data. Damage classification with WDRVI only resulted in slight improvement compared to the NDVI. Only weak relationships were found between the LIDAR-estimated defoliation and the change parameters obtained from MODIS. Consequently, mapping of the degree of defoliation from MODIS was abandoned. In conclusion, the damage detection method based on MODIS data was found to be useful for locating insect damage, but not for estimating its intensity. Control of the detected damage areas using high-resolution remote sensing data, aerial survey, or fieldwork is recommended for accurate delineation in operational applications.

Prevalence of hereditary ataxia and spastic paraplegia in southeast Norway: a population-based study

A population-based, cross-sectional study was performed in southeast Norway, between January 2002 and February 2008, to identify subjects with hereditary ataxia and hereditary spastic paraplegia, and to estimate the prevalence of these disorders. Patients were recruited through colleagues, families, searches in computerized hospital archives and the National Patients' Association for Hereditary Ataxia and Spastic Paraplegia. Strict criteria were used for inclusion of familial and isolated subjects. A project neurologist examined all index subjects and clinical and genetic data were registered. The source population on January 1, 2008 was 2.63 million and the prevalence day was set as February 1, 2008. One hundred seventy-one subjects from 87 unrelated families with hereditary ataxia and 194 subjects from 65 unrelated families with hereditary spastic paraplegia were included. The total prevalence was estimated at 13.9/100 000. Hereditary ataxia prevalence in the region was estimated at 6.5/100 000: 4.2/100 000 for autosomal-dominant and 2.3/100 000 for autosomal recessive, 0.15/100 000 for Friedreich's ataxia and 0.4/100 000 for ataxia telangiectasia. Hereditary spastic paraplegia prevalence was 7.4/100 000: 5.5/100 000 for autosomal dominant-hereditary spastic paraplegia, 0.6/100 000 for autosomal recessive-hereditary spastic paraplegia and 1.3/100 000 for isolated subjects. Marked differences were found in the frequencies of hereditary ataxia subtypes compared with other countries, while those of the most common autosomal dominant-hereditary spastic paraplegia genotypes, SPG4, SPG3 and SPG31, were similar to those previously reported. Clear variations between age groups and counties were observed, but no gender differences. Mean age on prevalence day was 48 years, mean age at onset was 24 years. We present the largest population study performed on hereditary ataxia and hereditary spastic paraplegia prevalence and report a higher prevalence than expected. Better inclusion criteria and multiple search strategies may explain the observed differences.

Postmenopausal hormone therapy with estradiol and norethisterone acetate and mammographic density: findings from a cross-sectional study among Norwegian women

Background Although a number of studies have evaluated the associations between use of postmenopausal hormone therapy (HT) and mammographic density, few have assessed the effects of the medications containing estradiol (E2) plus norethisterone acetate (NETA). In particular, there are few data on the effects of the low-dose E2/NETA regimen.Methods We included data from 724 women, aged 50–70 years, residing in south-east Norway, who participated in a cross-sectional study conducted within the Norwegian Breast Cancer Screening Program. We assessed mammographic density using a previously validated computer-assisted method.Results After adjusting for age at screening, number of children and body mass index, women who currently used HT had 6.0% higher percent mammographic density than never-users, p < 0.0001. Women who used either low- or high-dose continuous combined E2/NETA regimens had 7.7% (p < 0.0001) and 8.8% (p < 0.0001) higher percent mammographic density than never-users, respectively.Conclusion Our study suggests that the effect of E2/NETA regimens on mammographic density could be at least as detrimental to the breast tissue as several other estrogen + progestin regimens. Our results suggest that both low- and high-dose E2/NETA influence mammographic density, but there were some indications in our analyses that the effect of low-dose E2/NETA could be slightly lower than that of the older high-dose regimen.

Automatic detection of circular structures in high‐resolution satellite images of agricultural land

AbstractArchaeological sites are sometimes visible in satellite images as soil or crop marks. At best, the marks are distinct, but they tend to have less contrast with the background than many other patterns in the images. Consequently, reliable automated detection based on pattern recognition is very difficult. Our method detects circle‐shaped soil and crop marks in the panchromatic band of high‐resolution satellite images of agricultural fields. Such circular marks may be caused by burial mounds. In our approach, local contrast enhancement is applied in order to make weak marks more distinct. The image is then convolved with ring templates of varying sizes, giving high absolute values at candidate circular mark locations. Each candidate mark is presented to an operator, who may reject it. We tested our method on Quickbird images from southeast Norway. The number of detected candidate marks could be varied by changing a threshold value. A reasonable compromise between not detecting too many false rings and at the same time detecting as many true rings as possible, might be when the number of false detections is approximately seven times the number of true detections. In this case, 11 out of 15, or 73%, of the strong rings were detected, and 5 out of 10, or 50%, of the fairly strong rings were detected. This is 16 out of 25 of the strong and fairly strong rings, or 64%. Archaeologists state that the software tool we developed will be helpful for locating potential cultural heritage sites. Although it makes many false detections, it will relieve the operators from time‐consuming manual inspection of entire images. Copyright © 2008 John Wiley &amp; Sons, Ltd.

Recent forest limit changes in south-east Norway: Effects of climate change or regrowth after abandoned utilisation?

The forest limits of south-east Norway have expanded to higher altitudes. Two main processes are believed to cause these changes: regrowth after abandonment of human utilisation and recent climate changes. The article aims at separating the effects of these two processes on the upper forest limits and recent forest expansion. Four datasets representing 161.5 km2 have been used: climate data, downscaled climate change scenario data, forest height growth, and four vegetation maps. The maps represent the years 1959 and 2001, potential natural vegetation (PNV), and a climate change scenario (CCS). The recent upper potential climatic and edaphic forest limit (UPCEFL) was used to define the potential for forest regrowth after the abandonment of human utilisation. Forest height growth and climate data were then used to analyse any supplementary effect of recent climate change. The projected future forest limits were based on the IPCC IS92a scenario for 2020–2049. The results show that raised forest limits and forest range expansion often attributed to recent climate change is rather the product of regrowth, a process that was climatically retarded from 1959 to 1995. For the period 1995–2006, the data indicate a preliminary effect of climate change escalating the regrowth and probably pushing the future forest limits to higher altitudes.

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<h3>Introduction</h3> Postoperative delirium is common in older cardiac surgery patients and associated with negative short-term and long-term outcomes. The alpha-2-adrenergic receptor agonist dexmedetomidine shows promise as prophylaxis and treatment for...

A cluster of Legionnaires’ disease linked to an industrial plant in southeast Norway, June-July 2008

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