Scalable Early Detection of Grapevine Viral Infection with Airborne Imaging Spectroscopy.

The U.S. wine and grape industry loses $3B annually due to viral diseases including grapevine leafroll-associated virus complex 3 (GLRaV-3). Current detection methods are labor-intensive and expensive. GLRaV-3 has a latent period in which the vines are infected but do not display visible symptoms, making it an ideal model to evaluate the scalability of imaging spectroscopy-based disease detection. The NASA Airborne Visible and Infrared Imaging Spectrometer Next Generation was deployed to detect GLRaV-3 in Cabernet Sauvignon grapevines in Lodi, CA in September 2020. Foliage was removed from the vines as part of mechanical harvest soon after image acquisition. In September of both 2020 and 2021, industry collaborators scouted 317 hectares on a vine-by-vine basis for visible viral symptoms and collected a subset for molecular confirmation testing. Symptomatic grapevines identified in 2021 were assumed to have been latently infected at the time of image acquisition. Random forest models were trained on a spectroscopic signal of noninfected and GLRaV-3 infected grapevines balanced with synthetic minority oversampling of noninfected and GLRaV-3 infected grapevines. The models were able to differentiate between noninfected and GLRaV-3 infected vines both pre- and postsymptomatically at 1 to 5 m resolution. The best-performing models had 87% accuracy distinguishing between noninfected and asymptomatic vines, and 85% accuracy distinguishing between noninfected and asymptomatic + symptomatic vines. The importance of nonvisible wavelengths suggests that this capacity is driven by disease-induced changes to plant physiology. The results lay a foundation for using the forthcoming hyperspectral satellite Surface Biology and Geology for regional disease monitoring in grapevine and other crop species. [Formula: see text] Copyright © 2023 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.

Development of a psychosocial intervention to support informal caregivers of people with end-stage kidney disease receiving haemodialysis.

BACKGROUND: Patients with end-stage kidney disease, receiving haemodialysis rely increasingly on informal carers to help manage their debilitating chronic disease. Informal carers may experience a negative impact on their quality of life exacting a toll on their physical, social and emotional well-being. Informal carers of patients with end-stage kidney disease receiving haemodialysis have significant unmet needs which may include physical and psychological issues, financial disadvantage and social isolation. Poor experiences of informal carers may also impact the experience of the patients for whom they care. The needs of this group of informal caregivers have been largely neglected, with little emphasis placed on supportive interventions that might assist and support them in their caring role. The aim of this study is therefore to explore the experiences and unmet needs of informal carers of people with end-stage kidney disease receiving haemodialysis and develop a psychosocial intervention to support them in their caring role. METHODS: This qualitative study will include a systematic review, semi-structured interviews with 30 informal carers and focus groups with renal health care professionals. Perceptions of care provision, caregiving experiences as well as contextual factors impacting the design and delivery of a psychosocial intervention for informal carers of patients with end-stage kidney disease, will be explored and will inform the development of a supportive intervention. DISCUSSION: The needs of informal carers of patients with end-stage kidney disease have been neglected with little emphasis placed on supportive interventions that might assist and support this group in their care giving role. This is in contrast to other chronic disease groups such as stroke, cancer and dementia. In these conditions well developed supportive interventions have significantly improved outcomes in regard to informal caregivers' preparedness, competence, positive emotions and psychological well-being in terms of informal care provision. Support interventions could potentially improve the quality of life of those informal carers who provide care to patients with end-stage kidney disease receiving haemodialysis.

Sanitizer efficacy against murine norovirus, a surrogate for human norovirus, on stainless steel surfaces when using three application methods.

Human noroviruses are major etiologic agents of epidemic gastroenteritis. Outbreaks are often accompanied by contamination of environmental surfaces, but since these viruses cannot be routinely propagated in laboratory cultures, their response to surface disinfectants is predicted by using surrogates, such as murine norovirus 1 (MNV-1). This study compared the virucidal efficacies of various liquid treatments (three sanitizer liquids, 5% levulinic acid plus 2% SDS [LEV/SDS], 200 ppm chlorine, and an isopropanol-based quaternary ammonium compound [Alpet D2], and two control liquids, sterile tap water and sterile tap water plus 2% SDS) when delivered to MNV-1-inoculated stainless steel surfaces by conventional hydraulic or air-assisted, induction-charged (AAIC) electrostatic spraying or by wiping with impregnated towelettes. For the spray treatments, LEV/SDS proved effective when applied with hydraulic and AAIC electrostatic spraying, providing virus reductions of 2.71 and 1.66 log PFU/ml, respectively. Alpet D2 provided a 2.23-log PFU/ml reduction with hydraulic spraying, outperforming chlorine (1.16-log PFU/ml reduction). Chlorine and LEV/SDS were equally effective as wipes, reducing the viral load by 7.05 log PFU/ml. Controls reduced the viral load by <1 log with spraying applications and by >3 log PFU/ml with wiping. Results indicated that both sanitizer type and application methods should be carefully considered when choosing a surface disinfectant to best prevent and control environmental contamination by noroviruses.

Analysis of reactive aldehydes in urine and plasma of type-2 diabetes mellitus patients through liquid chromatography-mass spectrometry: Reactive aldehydes as potential markers of diabetic nephropathy.

Introduction: Diabetes is a major public health issue that is approaching epidemic proportions globally. Diabetes mortality is increasing in all ethnic groups, irrespective of socio-economic class. Obesity is often seen as the main contributor to an increasing prevalence of diabetes. Oxidative stress has been shown to trigger obesity by stimulating the deposition of white adipose tissue. In this study, we measured reactive aldehydes by liquid chromatography-mass spectrometry (LC-MS), in the urine and plasma of type-2 diabetic mellitus (T2DM) patients, as potential surrogates of oxidative stress. Our hypothesis was that reactive aldehydes play a significant role in the pathophysiology of diabetes, and these reactive species, may present potential drug targets for patient treatment. Materials and methods: Study participants [N = 86; control n = 26; T2DM n = 32, and diabetic nephropathy (DN) n = 28] were recruited between 2019 and 2020. Urine and blood samples were collected from all participants, including a detailed clinical history, to include patient behaviours, medications, and co-morbidities. Reactive aldehyde concentrations in urine and plasma were measured using pre-column derivatisation and LC-MS, for control, T2DM and DN patients. Results: Reactive aldehydes were measured in the urine and plasma of control subjects and patients with T2DM and DN. In all cases, the reactive aldehydes under investigation; 4-HNE, 4-ONE, 4-HHE, pentanal, methylglyoxal, and glyoxal, were significantly elevated in the urine and serum of the patients with T2DM and DN, compared to controls (p < 0.001) (Kruskal-Wallis). Urine and serum reactive aldehydes were significantly correlated (≥0.7) (p < 0.001) (Spearman rho). The concentrations of the reactive aldehydes were significantly higher in plasma samples, when compared to urine, suggesting that plasma is the optimal matrix for screening T2DM and DN patients for oxidative stress. Conclusion: Reactive aldehydes are elevated in the urine and plasma of T2DM and DN patients. Reactive aldehydes have been implicated in the pathobiology of T2DM. Therefore, if reactive aldehydes are surrogates of oxidative stress, these reactive aldehyde species could be therapeutic targets for potential drug development.

Biomarkers for Detecting Kidney Dysfunction in Type-2 Diabetics and Diabetic Nephropathy Subjects: A Case-Control Study to Identify Potential Biomarkers of DN to Stratify Risk of Progression in T2D Patients.

Introduction: Currently there are no biomarkers that are predictive of when patients with type-2 diabetes (T2D) will progress to more serious kidney disease i.e., diabetic nephropathy (DN). Biomarkers that could identify patients at risk of progression would allow earlier, more aggressive treatment intervention and management, reducing patient morbidity and mortality. Materials and Methods: Study participants (N=88; control n=26; T2D n=32; DN n=30) were recruited from the renal unit at Antrim Area Hospital, Antrim, UK; Whiteabbey Hospital Diabetic Clinic, Newtownabbey, UK; Ulster University (UU), Belfast, UK; and the University of the Third Age (U3A), Belfast, UK; between 2019 and 2020. Venous blood and urine were collected with a detailed clinical history for each study participant. Results: In total, 13/25 (52.0%) biomarkers measured in urine and 25/34 (73.5%) biomarkers measured in serum were identified as significantly different between control, T2D and DN participants. DN patients, were older, smoked more, had higher systolic blood pressure and higher serum creatinine levels and lower eGFR function. Serum biomarkers significantly inversely correlated with eGFR. Conclusion: This pilot-study identified several serum biomarkers that could be used to predict progression of T2D to more serious kidney disease: namely, midkine, sTNFR1 and 2, H-FABP and Cystatin C. Our results warrant confirmation in a longitudinal study using a larger patient cohort.

Clinical Assessment of Dialysis Recovery Time and Symptom Burden: Impact of Switching Hemodialysis Therapy Mode.

INTRODUCTION: Most people on hemodialysis (HD) report a high symptom burden. Fatigue and lack of energy are prominent, interfering with daily life and associated with poor outcome. Prolonged recovery time after each of the thrice weekly dialysis treatments is common. The impact of HD therapies, like expanded hemodialysis (HDx), on patient reported recovery time and symptom burden is unclear. METHODS: A dialysis unit decided to perform regular assessments of patient-reported symptom burden, using the POS-S Renal Symptom questionnaire and the "Recovery time from last dialysis session" question as part of routine patient focused care. At a similar time, a clinical evidence-based decision was taken to switch the in-center dialysis cohort from regular high-flux dialysis membrane to medium cut-off (MCO) membrane, introducing HDx therapy. RESULTS: Quarterly assessment of patient-reported symptom burden was well accepted. A sustained clinically relevant reduction in post-dialysis recovery time was observed following the therapy switch. In patients providing data up to 12 months (N = 58), median recovery time decreased from 210 min (IQR 7.5-600) to 60 min (0-210; p = 0.002) and 105 min (0-180; p = 0.001) at 6 and 12 months, respectively. Thirty-six percent of individuals reported a recovery time longer than 360 minutes at the initial assessment, which decreased to 9% at 12 months. The POS-S Renal total symptom score showed a decrease at 6 months but no difference from baseline at 12 months. The "fatigue/lack of energy" symptom showed a sustained improvement; the percentage of participants scoring its impact as "severe" or "overwhelming" decreased from 28% at baseline to 16% at 12 months. Changes in other symptoms were more variable. CONCLUSION: Regular assessment of patient reported symptoms is feasible in routine dialysis practice and can help in evaluating the impact of clinical interventions. Observations suggest that HDx therapy may reduce post-dialysis recovery time and improve perceived fatigue level.

A nonrandomised pilot study to examine the feasibility and acceptability of reflexology in patients undergoing hospital-based haemodialysis (solitude study).

BACKGROUND: Patients with end-stage kidney disease, receiving haemodialysis can experience complications-hypotension, headache, muscle cramp, chest pain, nausea and vomiting. Patients who experience all or some of these symptoms will often report reduced health-related quality of life (HRQOL) and poor sleep quality, which may lead to increased morbidity and mortality. OBJECTIVE: The objective of this pilot study is to evaluate the feasibility of a larger randomised controlled trial to determine the effect of foot reflexology on a cohort of patients undergoing hospital-based haemodialysis. DESIGN: A nonrandomised pilot study using a multimethod approach. PARTICIPANTS: Twenty patients undergoing hospital-based haemodialysis treatment. MEASUREMENTS: HRQOL and quality of sleep were measured using the SF-12 Health Survey and the Pittsburgh Sleep Quality Index (PSQI). Semi-structured interviews were completed with 10 patients, exploring their experiences, opinions and perceptions of the intervention. RESULTS: There was an increase in the mean scores examining the total physical health and mental health components of the SF-12. All corresponding p values were statistically significant following the intervention. The mean total sleep score postintervention signified positive changes in sleep quality, with the corresponding p values being statistically significant. The study established the feasibility of the intervention and the benefits for patients undergoing haemodialysis. CONCLUSION: This pilot study demonstrated the possibility of recruiting and retaining patients undergoing haemodialysis to a reflexology study. The study did not impact the haemodialysis routine and was positively received. The intervention showed statistically significant improvements in patients' HRQOL and sleep quality.

A Novel Population of Fusarium fujikuroi Isolated from Southeastern U.S. Winegrapes Reveals the Need to Re-Evaluate the Species' Fumonisin Production.

Mycotoxins pose a challenge to a safe food supply worldwide, and their threat is expected to worsen with our changing climate. The need for diligence is exemplified by the discovery of fumonisin B2 in wine, which joins ochratoxin A as a mycotoxin of concern in the grape-wine chain. To elucidate the mycotoxin risk in southeastern American wine, grape samples were collected from vineyards during harvest in 2013 and potentially mycotoxigenic fungi (Fusarium and Aspergillus) were isolated from the samples. Numerous Fusarium isolates were recovered and identified to the species level by comparison of translation elongation factor 1-α gene sequences to verified strains. Fusarium fujikuroi was the most abundant species recovered (239 isolates), followed by F. proliferatum (52), F. incarnatum-equiseti (14), F. oxysporum (7), F. concentricum (1), and F. solani (1). In vitro assays quantified fumonisin production for representative isolates via liquid chromatography-tandem mass spectrometry. Surprisingly, nearly all F. fujikuroi isolates produced fumonisins B1, B2, and B3 at levels comparable to both the F. proliferatum isolates and the positive control, Fusarium verticillioides. Such capacity for fumonisin production refutes the generally accepted notion that F. fujikuroi produces undetectable or low levels of fumonisins and provides evidence to reconsider this species as a mycotoxigenic threat to economically significant crops.

Effects of triclosan on growth, viability and fatty acid synthesis of the oyster protozoan parasite Perkinsus marinus.

Perkinsus marinus, a protozoan parasite of the Eastern oyster Crassostrea virginica, has severely impacted oyster populations from the Mid-Atlantic region to the Gulf of Mexico coast of North America for more than 30 yr. Although a chemotherapeutic treatment to reduce or eliminate P. marinus from infected oysters would be useful for research and hatchery operations, an effective and practical drug treatment does not currently exist. In this study, the antimicrobial drug triclosan 5-chloro-2-(2,4 dichlorophenoxy) phenol, a specific inhibitor of Fab1 (enoyl-acyl-carrier-protein reductase), an enzyme in the Type II class of fatty acid synthetases, was tested for its effects on viability, proliferation and fatty acid synthesis of in vitro-cultured P. marinus meronts. Treatment of P. marinus meront cell cultures with concentrations of > or = 2 microM triclosan at 28 degrees C (a temperature favorable for parasite proliferation) for up to 6 d stopped proliferation of the parasite. Treatment at > or = 5 microM at 28 degrees C greatly reduced the viability and fatty acid synthesis of meront cells. Oyster hemocytes treated with > or = 20 microM triclosan exhibited no significant (p < 0.05) reduction in viability relative to controls for up to 24 h at 13 degrees C. P. marinus meronts exposed to > or = 2 microM triclosan for 24 h at 13 degrees C exhibited significantly (p < 0.05) lower viability relative to controls. Exposure of P. marinus meronts to triclosan concentrations of > or = 20 microM resulted in > 50% mortality of P. marinus cells after 24 h. These results suggest that triclosan may be effective in treating P. marinus-infected oysters.

Efficacy of a levulinic acid plus sodium dodecyl sulfate-based sanitizer on inactivation of human norovirus surrogates.

Human noroviruses are the most common etiologic agent of foodborne illness in the United States. The inability to culture human noroviruses in the laboratory necessitates the use of surrogate viruses such as murine norovirus (MNV-1) and feline calicivirus (FCV) for inactivation studies. In this study, a novel sanitizer of organic acid (levulinic acid) plus the anionic detergent sodium dodecyl sulfate (SDS) was evaluated. Viruses were treated with levulinic acid (0.5 to 5%), SDS (0.05 to 2%), or combinations of levulinic acid plus SDS (1:10 solution of virus to sanitizer). MNV-1 inoculated onto stainless steel also was treated with a 5% levulinic acid plus 2% SDS liquid or foaming solution. Log reductions of viruses were determined with a plaque assay. Neither levulinic acid nor SDS alone were capable of inactivating MNV-1 or FCV, resulting in a ≤0.51-log reduction of the infectious virus titer. However, the combination of 0.5% levulinic acid plus 0.5% SDS inactivated both surrogates by 3 to 4.21 log PFU/ml after 1 min of exposure. Similarly, MNV-1 inoculated onto stainless steel was reduced by >1.50 log PFU/ml after 1 min and by >3.3 log PFU/ml after 5 min of exposure to a liquid or foaming solution of 5% levulinic acid plus 2% SDS. The presence of organic matter (up to 10%) in the virus inoculum did not significantly affect sanitizer efficacy. The fact that both of the active sanitizer ingredients are generally recognized as safe to use as food additives by the U.S. Food and Drug Administration further extends its potential in mitigating foodborne disease.