Quantification of SARS-CoV-2 neutralizing antibody by wild-type plaque reduction neutralization, microneutralization and pseudotyped virus neutralization assays.

Virus neutralization assays measure neutralizing antibodies in serum and plasma, and the plaque reduction neutralization test (PRNT) is considered the gold standard for measuring levels of these antibodies for many viral diseases. We have developed procedures for the standard PRNT, microneutralization assay (MNA) and pseudotyped virus neutralization assay (PNA) for severe acute respiratory syndrome coronavirus 2. The MNA offers advantages over the PRNT by reducing assay time, allowing increased throughput and reducing operator workload while remaining dependent upon the use of wild-type virus. This ensures that all severe acute respiratory syndrome coronavirus 2 antigens are present, but Biosafety Level 3 facilities are required. In addition to the advantages of MNA, PNA can be performed with lower biocontainment (Biosafety Level 2 facilities) and allows for further increases in throughput. For each new vaccine, it is critical to ensure good correlation of the neutralizing activity measured using PNA against the PRNT or MNA. These assays have been used in the development and licensure of the ChAdOx1 nCoV-19 (AstraZeneca; Oxford University) and Ad26.COV2.S (Janssen) coronavirus disease 2019 vaccines and are critical for demonstrating bioequivalence of future vaccines.

Use of catheter maintenance solutions by community nursing staff: an assessment.

This article discusses catheter maintenance solutions, the way they are supposed to be used and the way they actually are being used in primary and community care in the UK. It discusses the knowledge that community nursing staff have regarding these solutions and the need for further education. Appropriate assessment from a suitably trained individual is recommended, resulting in both usage and cost being dramatically decreased, offering more appropriate management and the likelihood of decreasing the incidence of catheter-associated urinary tract infections (CAUTI). The literature surrounding catheter maintenance solutions is investigated, and the lack of available evidence is highlighted. Preliminary research exploring primary and community care nurses' knowledge of catheter maintenance solutions is also discussed.

Social Distancing with Portable Chest Radiographs During the COVID-19 Pandemic: Assessment of Radiograph Technique and Image Quality Obtained at 6 Feet and Through Glass.

PURPOSE: To develop a technique that allows portable chest radiography to be performed through the glass door of a patient's room in the emergency department. MATERIALS AND METHODS: A retrospective review of 100 radiographs (50 [mean age 59.4 ± 17.3, range 22-87; 30 women] performed with the modified technique in April 2020, randomized with 50 [mean age 59 ± 21.6, range 19-100; 31 men] using the standard technique was completed by three thoracic radiologists to assess image quality. Radiation exposure estimates to patient and staff were calculated. A survey was created and sent to 32 x-ray technologists to assess their perceptions of the modified technique. Unpaired Ttests were used for numerical data. A P value < .05 was considered statistically significant. RESULTS: The entrance dose for a 50th percentile patient was the same between techniques, measuring 169 µGy. The measured technologist exposure from the modified technique assuming a 50th percentile patient and standing 6 feet to the side of the glass was 0.055 µGy, which was lower than standard technique technologist exposure of 0.088 µGy. Of the 100 portable chest radiographs evaluated by three reviewers, two reviewers rated all images as having diagnostic quality, while the other reviewer believed two of the standard images and one of the modified technique images were non-diagnostic. A total of 81% (26 of 32) of eligible technologists completed the survey. Results showed acceptance of the modified technique with the majority feeling safer and confirming conservation of PPE. Most technologists did not feel the modified technique was more difficult to perform. CONCLUSIONS: The studies acquired with the new technique remained diagnostic, patient radiation doses remained similar, and technologist dose exposure were decreased with modified positioning. Perceptions of the new modified technique by frontline staff were overwhelmingly positive.

Cost analysis of an integrated aged care program for residential aged care facilities.

Objective To compare annual costs of an intervention for acutely unwell older residents in residential age care facilities (RACFs) with usual care. The intervention, the Aged Care Emergency (ACE) program, includes telephone clinical support aimed to reduce avoidable emergency department (ED) presentations by RACF residents. Methods This costing of the ACE intervention examines the perspective of service providers: RACFs, Hunter Medicare Local, the Ambulance Service of New South Wales, and EDs in the Hunter New England Local Health District. ACE was implemented in 69 RACFs in the Hunter region of NSW, Australia. Analysis used 14 weeks of ACE and ED service data (June-September 2014). The main outcome measure was the net cost and saving from ACE compared with usual care. It is based on the opportunity cost of implementing ACE and the opportunity savings of ED presentations avoided. Results Our analysis estimated that 981 avoided ED presentations could be attributed to ACE annually. Compared with usual care, ACE saved an estimated A$921214. Conclusions The ACE service supported a reduction in avoidable ED presentations and ambulance transfers among RACF residents. It generated a cost saving to health service providers, allowing reallocation of healthcare resources. What is known about the topic? Residents from RACFs are at risk of further deterioration when admitted to hospital, with high rates of delirium, falls, and medication errors. For this cohort, some conditions can be managed in the RACF without hospital transfer. By addressing avoidable presentations to EDs there is an opportunity to improve ED efficiency as well as providing care that is consistent with the resident's goals of care. RACFs generate some avoidable ED presentations for residents who may be more appropriately treated in situ. What does this paper add? Telephone triaging with nursing support and training is a means by which ED presentations from RACFs can be reduced. One of the consequences of this intervention is 'cost avoided', largely through savings on ambulance costs. What are the implications for practitioners? Unnecessary transfer from RACFs to ED can be avoided through a multicomponent program that includes telephone support with cost-saving implications for EDs and ambulance services.