Azasulfur(vi) compounds such as sulfoximines and sulfonimidamides are attractive due to the unique properties of the S[double bond, length as m-dash]N bond. While the synthesis of these carbon-attached sulfonimidoyl derivatives is well-established, the situation is different for their heteroatom-bound counterparts. In this work, we propose azasulfur(iv) esters as platform chemicals that can be derivatized to obtain all types of S[double bond, length as m-dash]N functional groups, among these are the poorly accessible, all-heteroatom imidosulfate esters.
View Article and Find Full Text PDFViruses
January 2022
The recent emergence and circulation of the A/ASIA/G-VII (A/G-VII) lineage of foot-and-mouth disease virus (FMDV) in the Middle East has resulted in the development of homologous vaccines to ensure susceptible animals are sufficiently protected against clinical disease. However, a second serotype A lineage called A/ASIA/Iran-05 (A/IRN/05) continues to circulate in the region and it is therefore imperative to ensure vaccine strains used will protect against both lineages. In addition, for FMDV vaccine banks that usually hold a limited number of strains, it is necessary to include strains with a broad antigenic coverage.
View Article and Find Full Text PDFThe exchange of O between gaseous molecular oxygen and thin-film samples of CeGdO with two different, nominal surface orientations [(111) and (110)] was studied. Oxygen isotope exchange experiments were conducted in the temperature range of 573 ≤ /K ≤ 673 at an oxygen activity of O = 0.2.
View Article and Find Full Text PDFFoot-and-mouth disease virus (FMDV) is a highly variable RNA virus existing as seven different serotypes. The antigenic variability between and within serotypes can limit the cross-reactivity and therefore the in vivo cross-protection of vaccines. Selection of appropriate vaccine strains is crucial in the control of FMD.
View Article and Find Full Text PDFThe genome sequences of three serotype O foot-and-mouth disease viruses (FMDVs) isolated from outbreaks in Pakistan in 2016 and 2017 are described. Despite all three isolates being classified in the same FMDV genetic sublineage, two of them displayed a distinct antigenic phenotype against commonly used vaccine strains.
View Article and Find Full Text PDFIn 2015, outbreaks of foot-and-mouth disease (FMD) in the Middle East were discovered to be caused by a viral lineage (A/ASIA/G-VII), which has recently emerged from the Indian sub-continent. In vitro vaccine matching data generated by the World Reference Laboratory (WRLFMD) indicated that A/ASIA/G-VII field viruses were poorly matched with vaccines (A-SAU-95, A22 IRQ and A-IRN-05) that are already used in the region. In order to assess the likely performance of one of these commercially available FMD vaccines, sixteen cattle were vaccinated with a polyvalent vaccine which contained two serotype A components (A-SAU-95 and A-IRN-05) with a homologous potency of at least 6PD, and two cattle were left unvaccinated as controls.
View Article and Find Full Text PDFOutbreaks of foot-and-mouth disease (FMD) in North Africa (2013) and the Gulf States (2013) of the Middle East have been caused by a FMD viral lineage (O/ME-SA/Ind-2001) that was before 2013 restricted to the Indian Sub-continent. This study was undertaken to assess the in vivo efficacy of a FMD virus emergency vaccine type O Manisa against heterologous challenge with a representative field virus (O/ALG/3/2014) from this emerging lineage. This widely available vaccine was selected since in vitro vaccine-matching results gave inconclusive results as to whether or not it would be protective.
View Article and Find Full Text PDFA new immunologically distinct strain (A-Iran-05) of foot-and-mouth disease virus serotype A emerged in the Middle East in 2003 that replaced the previously circulating strains (A-Iran-96 and A-Iran-99) in the region. This resulted in introduction of a new vaccine of this strain (A/TUR/2006) in 2006. Though this vaccine strain has been predominantly used to control FMD in the region, recent viruses isolated in 2012 and 2013 have shown antigenic drift and a poor match with it.
View Article and Find Full Text PDFBackground: Nickel allergy is common worldwide. It is associated with hand dermatitis, and sensitization is often induced by nickel-releasing jewellery. The European Union (EU) introduced legislation to control nickel content and release from jewellery and other consumer items through the EU Nickel Directive 1994, which came into force in 2001 and is now part of the REACH regulation.
View Article and Find Full Text PDFThe immune defense against FMDV has been correlated to the antibody mediated component. However, there are occasions when some animals with high virus neutralising (VN) antibody are not protected following challenge and some with low neutralising antibody which do not succumb to disease. The importance of cell mediated immunity in clinical protection is less clear and so we investigated the source and production of interferon-gamma (IFN-γ) in re-stimulated whole blood of FMDV immunized cattle and its correlation to vaccine induced protection and FMDV persistence.
View Article and Find Full Text PDFBackground: The proportion of patients with a positive patch test reaction to at least one allergen from the baseline series differs between departments.
Objectives: To further define the above mentioned proportion, termed the 'P' measure, to examine factors associated with this measure, to describe its variation over time and between centres, and to discuss possible uses.
Patients And Methods: Eighteen departments have been 'long-term' participants in the Information Network of Departments of Dermatology (IVDK; www.
Background: Differences exist between the rates of patients with positive patch test reactions in different centres.
Objectives: To explore the varying relationship between the percentage of patients with one or more positive reactions (rate of patients with positive reactions) and the proportion of the population tested annually (intensity of testing) by UK centres contributing to a shared data pool.
Methods: Patch test data were pooled from 11 UK centres that use the British Society for Cutaneous Allergy (BSCA), formerly known as the British Society for Contact Dermatitis, database.
Background: Propolis is widely used in 'natural' cosmetics, remedies, and over-the-counter products. The incidence of propolis allergy is increasing, and cross-reaction with fragrance mix I (FMII), colophonium, and Myroxylon pereirae can occur.
Objectives: To find out the prevalence and clinical relevance of positive patch tests to propolis and assess cross-reactions with Myroxylon pereirae, colophonium, FMI, and beeswax.
The management of chronic hand eczema is often inadequate. There are currently no evidence-based guidelines specifically for the management of chronic hand eczema, and evidence for established treatments for hand eczema is not of sufficient quality to guide clinical practice. This consensus statement, based on a review of published data and clinical practice in both primary and secondary care, is intended to guide the management of chronic hand eczema.
View Article and Find Full Text PDFBackground: Continual surveillance based on patch test results has proved useful for the identification of contact allergy.
Objectives: To provide a current view on the spectrum of contact allergy to important sensitizers across Europe.
Patients/methods: Clinical and patch test data of 19 793 patients patch tested in 2005/2006 in the 31 participating departments from 10 European countries (the European Surveillance System on Contact Allergies' (ESSCA) www.
Preservative sensitivity in the UK was last assessed in 2000. Given the changes in preservative usage, we have re-evaluated our patch test data in order to detect any changes in the trend of sensitization. The results of patch testing using the extended British Contact Dermatitis Society Standard series were collected from 9 dermatology centres in the UK.
View Article and Find Full Text PDFTixocortol pivalate (TP) is a good marker for hydrocortisone allergy. The concentration of TP to be included in the standard series for patch testing has been the subject of debate. The objective of this study was to investigate the right concentration of TP to be included in the standard series for patch testing.
View Article and Find Full Text PDF