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1.
Int J Clin Pharm ; 45(3): 698-711, 2023 Jun.
Article in English | MEDLINE | ID: mdl-37093415

ABSTRACT

BACKGROUND: Pharmacists can use teach-back to improve patients' understanding of medication; however, the evidence of its impact on patient outcomes is inconsistent. From the literature, there is no standardised way to provide pharmacist-delivered medication counselling at hospital discharge, with limited reporting on training. AIM: To develop a standardised medication counselling procedure using teach-back at hospital discharge, and to evaluate feedback from patients and pharmacists on this initiative. METHOD: A standardised intervention procedure was developed. Participating pharmacists (n = 9) were trained on teach-back via an online education module and watching a demonstration video created by the researchers. Pharmacists provided patients with discharge medication counselling utilising teach-back and a patient-friendly list of medication changes to take home. To obtain feedback, patients were surveyed within seven days of discharge via telephone and pharmacists answered an anonymous survey online. RESULTS: Thirty-two patients (mean age: 57 years; range: 19-91) were counselled on a mean 2.94 medications/patient with the mean counselling time as 23.6 min/patient. All patients responded to the survey, whereby 93.7% had increased confidence regarding medication knowledge and were satisfied with the counselling and the information provided. All pharmacist survey respondents (n = 8) agreed they were given adequate training and that teach-back was feasible to apply in practice. CONCLUSION: This is the first study to evaluate patients' views on pharmacist-provided teach-back medication counselling. With positive patient outcomes, a standardised procedure, and a comprehensive description of the training, this study can inform the development of discharge medication counselling utilising teach-back going forward.


Subject(s)
Patient Discharge , Pharmacists , Humans , Middle Aged , Counseling , Surveys and Questionnaires , Hospitals
2.
Mult Scler Relat Disord ; 56: 103317, 2021 Nov.
Article in English | MEDLINE | ID: mdl-34653949

ABSTRACT

BACKGROUND: In March 2020, the United Kingdom Multiple Sclerosis Register (UKMSR) established an electronic case return form, designed collaboratively by MS neurologists, to record data about COVID-19 infections in people with MS (pwMS). OBJECTIVES: Examine how hospital admission and mortality are affected by disability, age and disease modifying treatments (DMTs) in people with Multiple Sclerosis with COVID-19. METHODS: Anonymised data were submitted by clinical teams. Regression models were tested for predictors of hospitalisation and mortality outcomes. Separate analyzes compared the first and second 'waves' of the pandemic. RESULTS: Univariable analysis found hospitalisation and mortality were associated with increasing age, male gender, comorbidities, severe disability, and progressive MS; severe disability showed the highest magnitude of association. Being on a DMT was associated with a small, lower risk. Multivariable analysis found only age and male gender were significant. Post hoc analysis demonstrated that factors were significant for hospitalisation but not mortality. In the second wave, hospitalisation and mortality were lower. Separate models of the first and second wave using age and gender found they had a more important role in the second wave. CONCLUSIONS: Features associated with poor outcome in COVID-19 are similar to other populations and being on a DMT was not found to be associated with adverse outcomes, consistent with smaller studies. Once in hospital, no factors were predictive of mortality. Reassuringly, mortality appears lower in the second wave.


Subject(s)
COVID-19 , Multiple Sclerosis , Humans , Male , Multiple Sclerosis/epidemiology , Multiple Sclerosis/therapy , Pandemics , Patient Reported Outcome Measures , SARS-CoV-2
3.
Am J Health Syst Pharm ; 78(3): 210-215, 2021 01 22.
Article in English | MEDLINE | ID: mdl-33480407

ABSTRACT

PURPOSE: Results of a study comparing the safety and efficacy outcomes with use of a soybean oil-based injectable lipid emulsion (SO-ILE) vs a 4-oil alternative product in a neonatal population are presented. METHODS: In an institutional review board-approved, multicenter retrospective review, the medical records of 328 patients who were born at a gestational age of ≤34 weeks, had a birth weight of 500 to 2,000 g, were admitted to one of 2 neonatal intensive care units (NICUs) within a large health system, and received at least 7 days of a parenteral nutrition containing either lipid emulsion product were reviewed: 151 (46%) had received SO-ILE and 177 (54%) had received SMOFlipid (Fresenius Kabi). The primary outcome of the study was a composite of development of cholestasis and development of hypertriglyceridemia. Secondary outcomes included total duration of cholestasis treatment with ursodiol and change in body weight from initiation to completion of lipid emulsion treatment. RESULTS: The primary outcome of development of cholestasis or hypertriglyceridemia occurred in 14.6% of patients in the SO-ILE group and 18.1% of patients in the SMOFlipid group (P = 0.393). There were no statistically significant differences between the groups in total days of ursodiol treatment or average body weight change during the course of lipid emulsion treatment. CONCLUSION: In preterm neonates weighing 500 to 2,000 g, use of SMOFlipid did not significantly reduce the incidence of cholestasis or hypertriglyceridemia relative to the incidence with use of SO-ILE. Further research to validate these results is needed.


Subject(s)
Fat Emulsions, Intravenous , Soybean Oil , Fat Emulsions, Intravenous/adverse effects , Fish Oils , Humans , Infant , Infant, Newborn , Olive Oil , Retrospective Studies , Soybean Oil/adverse effects , Triglycerides
4.
Res Social Adm Pharm ; 16(8): 1017-1025, 2020 Aug.
Article in English | MEDLINE | ID: mdl-31866121

ABSTRACT

BACKGROUND: In 2017, the World Health Organisation pledged to halve medication errors by 2022. In order to learn from medication errors and prevent their recurrence, it is essential that medication errors are reported when they occur. OBJECTIVES: The aim of this systematic review was to identify studies in which interventions were carried out in hospitals to improve medication error reporting, to summarise the findings of these studies, and to make recommendations for future investigations. METHODS: A comprehensive search of five electronic databases (PubMed, Medline (OVID), Embase (OVID), Web of Science, and CINAHL) was conducted from inception up to and including December 2018. Studies were included if they described an intervention aiming to increase the reporting of medication errors by healthcare providers in hospitals and excluded if there was no full-text English language version available, or if the reporting rate in the hospital prior to the intervention was not available. Data extracted from included studies were described using narrative synthesis. RESULTS: Of 12,025 identified studies, seventeen were included in this review - fifteen uncontrolled before versus after studies, one survey and one non-equivalent group controlled trial. Five studies carried out a single intervention and twelve studies conducted multifaceted interventions. The most common intervention types were critical incident reporting, implemented in fifteen studies, and audit and feedback, implemented in seven studies. Other intervention types included educational materials, educational meetings, and role expansion and task shifting. As only one study compared a control and intervention group, the effectiveness of the different intervention types could not be evaluated. CONCLUSION: This is the first review to address the evidence on medication error reporting in hospitals on a global scale. The review has identified interventions to improve medication error reporting that were implemented without evidence of their effectiveness. Due to the essential role played by incident reporting in learning from and preventing the recurrence of medication errors more research needs to be done in this area.


Subject(s)
Hospitals , Neoplasms , Humans , Medication Errors
5.
J Phys Chem B ; 123(43): 9198-9205, 2019 10 31.
Article in English | MEDLINE | ID: mdl-31576754

ABSTRACT

The equation-of-motion coupled cluster method is used to characterize the low-lying anion states of (NaCl)2 in its rhombic structure. This species is known to possess a non-valence bound anion of Ag symmetry. Our calculations also demonstrate that it has a non-valence temporary anion of B2u symmetry, about 14 meV above threshold. The potential energy curves of the two anion states and of the ground state of the neutral molecule are reported as a function of distortion along the symmetric stretch normal coordinate. Implications for experimental detection of the temporary anion state are discussed. The sensitivity of the results to the inclusion of high-order correlation effects and of core correlation is examined.

6.
Vet Microbiol ; 220: 24-32, 2018 Jul.
Article in English | MEDLINE | ID: mdl-29885797

ABSTRACT

RHDVb has become the dominant RHDV on the Iberian Peninsula. A better understanding of its pathogenicity is required to aid control measures. Thus, the clinical course, humoral immune response, viraemia and kinetics of RHDV-N11 (a Spanish RHDVb isolate) infection in different tissues at both viral RNA and protein levels were studied in experimentally infected young and adult rabbits. The case fatality rate differed between the two age groups, with 21% of kits succumbing while no deaths were observed in adults. Fever and viremia were strongly associated with death, which occurred 48 h post infection (PI) too fast for an effective humoral immune response to be mounted. A significant effect on the number of viral RNA copies with regard to the variables age, tissue and time PI (p < 0.0001 in all cases) was detected. Histological lesions in infected rabbits were consistently more frequent and severe in liver and spleen and additionally intestine in kits, these tissues containing the highest levels of viral RNA and protein. Although no adults showed lesions or virus antigen in intestine, both kits and adults maintained steady viral RNA levels from days 1 to 7 PI in this organ. Analysis revealed the fecal route as the main dissemination route of RHDV-N11. Subclinically infected rabbits had detectable viral RNA in their faeces for up to seven days and thus may play an important role spreading the virus. This study allows a better understanding of the transmission of this virus and improvement of the control strategies for this disease.


Subject(s)
Caliciviridae Infections/veterinary , Hemorrhagic Disease Virus, Rabbit/pathogenicity , Age Factors , Animals , Antigens, Viral , Caliciviridae Infections/virology , Feces/virology , Hemorrhagic Disease Virus, Rabbit/classification , Hemorrhagic Disease Virus, Rabbit/genetics , Phylogeny , RNA, Viral/genetics , Rabbits , Spleen/virology , Viremia , Virulence
7.
Mult Scler Relat Disord ; 24: 3-10, 2018 Aug.
Article in English | MEDLINE | ID: mdl-29860199

ABSTRACT

The UK Multiple Sclerosis Register (UKMSR) is a large cohort study designed to capture 'real world' information about living with multiple sclerosis (MS) in the UK from diverse sources. The primary source of data is directly from people with Multiple Sclerosis (pwMS) captured by longitudinal questionnaires via an internet portal. This population's diagnosis of MS is self-reported and therefore unverified. The second data source is clinical data which is captured from MS Specialist Treatment centres across the UK. This includes a clinically confirmed diagnosis of MS (by Macdonald criteria) for consented patients. A proportion of the internet population have also been consented at their hospital making comparisons possible. This dataset is called the 'linked dataset'. The purpose of this paper is to examine the characteristics of the three datasets: the self-reported portal data, clinical data and linked data, in order to assess the validity of the self-reported portal data. The internet (n = 11,021) and clinical (n = 3,003) populations were studied for key shared characteristics. We found them to be closely matched for mean age at diagnosis (clinical = 37.39, portal = 39.28) and gender ratio (female %, portal = 73.1, clinical = 75.2). The Two Sample Kolmogorov-Smirnov test was for the continuous variables to examine is they were drawn from the same distribution. The null hypothesis was rejected only for age at diagnosis (D = 0.078, p < 0.01). The populations therefore, were drawn from different distributions, as there are more patients with relapsing disease in the clinical cohort. In all other analyses performed, the populations were shown to be drawn from the same distribution. Our analysis has shown that the UKMSR portal population is highly analogous to the entirely clinical (validated) population. This supports the validity of the self-reported diagnosis and therefore that the portal population can be utilised as a viable and valid cohort of people with Multiple Sclerosis for study.


Subject(s)
Multiple Sclerosis/epidemiology , Registries , Adult , Female , Humans , Internet , Male , Middle Aged , Self Report , United Kingdom
8.
Transbound Emerg Dis ; 65(1): 232-234, 2018 Feb.
Article in English | MEDLINE | ID: mdl-28247488

ABSTRACT

This work describes a simple and rapid test for field detection of the emerging rabbit pathogen RHDVb. The assay is specific for RHDVb, showing no cross-reactivity with other RHDV types giving a specific result in under 10 min using rabbit liquid exudates or liver homogenate samples taken at necropsy.


Subject(s)
Caliciviridae Infections/veterinary , Caliciviridae Infections/virology , Hemorrhagic Disease Virus, Rabbit/isolation & purification , Rabbits/virology , Animals , Antibodies, Monoclonal/immunology , Antibodies, Viral/blood , Caliciviridae Infections/diagnosis , Chromatography, Affinity/veterinary , Cross Reactions , Enzyme-Linked Immunosorbent Assay/veterinary , Mice, Inbred BALB C , Real-Time Polymerase Chain Reaction/veterinary
9.
Pest Manag Sci ; 74(4): 987-991, 2018 Apr.
Article in English | MEDLINE | ID: mdl-29159942

ABSTRACT

BACKGROUND: Effective control of house fly, Musca domestica (L.), populations currently relies on the use of chemical insecticides in most situations. Entomopathogenic fungi such as Metarhizium anisopliae (Metschn.) Sorokin may provide an alternative to chemicals and their efficacy may be enhanced by autodissemination amongst flies. This study assessed the capacity of M. anisopliae for transmission between adult M. domestica flies and the effects of infection on the fecundity of females. RESULTS: Metarhizium anisopliae was transmitted between adult M. domestica with 91.67-100% mortality resulting across the three ratios of infected: non-infected flies tested (1:2, 1:5 and 1:10). The mean lethal time (LT50 ) for female recipients mixed with infected male donor flies at the three ratios was 3.95, 4.79 and 5.65 days, respectively, whereas for male recipients mixed with infected female donors at the same ratios the LT50 was 4.98, 5.98 and 7.44 days, respectively. Infection with M. anisopliae significantly reduced the reproductive capacity of female flies during the first 4 days of infection, with 25% fewer eggs oviposited by infected flies than by those that were uninfected. CONCLUSION: Autodissemination among house flies and reduction in oviposition in the early stages of infection could contribute significantly to the effectiveness of M. anisopliae used in biocontrol programmes. © 2017 Society of Chemical Industry.


Subject(s)
Fertility , Houseflies/microbiology , Houseflies/physiology , Metarhizium/physiology , Oviposition , Pest Control, Biological , Animals , Female , Male
10.
J Virol Methods ; 251: 38-42, 2018 01.
Article in English | MEDLINE | ID: mdl-28941616

ABSTRACT

The emergence and rapid spread of variant of the rabbit hemorrhagic disease virus (RHDV2) require new diagnostic tools to ensure that efficient control measures are adopted. In the present study, a specific sandwich enzyme-linked immunosorbent assay (ELISA) for detection of RHDV2 antigens in rabbit liver homogenates, based on the use of an RHDV2-specific monoclonal antibody (Mab) 2D9 for antigen capture and an anti-RHDV2 goat polyclonal antibody (Pab), was developed. This ELISA was able to successfully detect RHDV2 and RHDV2 recombinant virions with high sensitivity (100%) and specificity (97.22%). No cross-reactions were detected with RHDV G1 viruses while low cross-reactivity was detected with one of the RHDVa samples analyzed. The ELISA afforded good repeatability and had high analytical sensitivity as it was able to detect a dilution 1:163,640 (6.10ng/mL) of purified RHDV-N11 VLPs, which contained approximately 3.4×108molecules/mL particles. The reliable discrimination between closely related viruses is crucial to understand the epidemiology and the interaction of co-existing pathogens. In the work described here we design and validate an ELISA for laboratory based, specific, sensitive and reliable detection of RHDVb/RHDV2. This ELISA is a valuable, specific virological tool for monitoring virus circulation, which will permit a better control of this disease.


Subject(s)
Antigens, Viral/analysis , Caliciviridae Infections/veterinary , Diagnostic Tests, Routine/methods , Enzyme-Linked Immunosorbent Assay/methods , Hemorrhagic Disease Virus, Rabbit/isolation & purification , Liver/virology , Animals , Antigens, Viral/immunology , Caliciviridae Infections/diagnosis , Caliciviridae Infections/virology , Cross Reactions , Hemorrhagic Disease Virus, Rabbit/immunology , Reproducibility of Results , Sensitivity and Specificity , Veterinary Medicine/methods
11.
J Virol Methods ; 251: 118-122, 2018 01.
Article in English | MEDLINE | ID: mdl-29024672

ABSTRACT

Since its emergence, variant RHDV (RHDVb/RHDV2) has spread throughout the Iberian Peninsula aided by the apparent lack of cross protection provided by classic (genogroup 1; G1) strain derived vaccines. In addition to RHDVb, full-length genome sequencing of RHDV strains has recently revealed the circulation of recombinant viruses on the Iberian Peninsula. These recombinant viruses contain the RHDVb structural protein encoding sequences and the non-structural coding regions of either pathogenic RHDV-G1 strains or non-pathogenic (np) rabbit caliciviruses. The aim of the work was twofold: firstly to validate a diagnostic real time RT-PCR developed in 2012 for the detection of RHDVb strains and secondly, to design a conventional RT-PCR for the differentiation of RHDVb strains from RHDVb recombinants by subsequent sequencing of the amplicon.


Subject(s)
Caliciviridae Infections/veterinary , Genetic Variation , Hemorrhagic Disease Virus, Rabbit/classification , Hemorrhagic Disease Virus, Rabbit/isolation & purification , Polymerase Chain Reaction/methods , Rabbits/virology , Animals , Caliciviridae Infections/virology , Hemorrhagic Disease Virus, Rabbit/genetics , Recombination, Genetic , Spain
12.
J Comp Pathol ; 156(4): 409-418, 2017 May.
Article in English | MEDLINE | ID: mdl-28457486

ABSTRACT

Spanish goat encephalitis virus (SGEV) is a recently described member of the genus Flavivirus belonging to the tick-borne encephalitis group of viruses, and is closely related to louping ill virus (LIV). Naturally acquired disease in goats results in severe, acute encephalitis and 100% mortality. Eighteen goats were challenged subcutaneously with SGEV; nine were vaccinated previously against LIV and nine were not. None of the vaccinated goats showed any clinical signs of disease or histological lesions, but all of the non-vaccinated goats developed pyrexia and 5/9 developed neurological clinical signs, primarily tremors in the neck and ataxia. All non-vaccinated animals developed histological lesions restricted to the central nervous system and consistent with a lymphocytic meningomyeloencephalitis. Vaccinated goats had significantly (P <0.003) greater concentrations of serum IgG and lower levels of IgM (P <0.0001) compared with unvaccinated animals. SGEV RNA levels were below detectable limits in the vaccinated goats throughout the experiment, but increased rapidly and were significantly (P <0.0001) greater 2-10 days post challenge in the non-vaccinated group. In conclusion, vaccination of goats against LIV confers highly effective protection against SGEV; this is probably mediated by IgG and prevents an increase in viral RNA load in serum such that vaccinated animals would not be an effective reservoir of the virus.


Subject(s)
Encephalitis, Viral/veterinary , Flavivirus Infections/veterinary , Goat Diseases/prevention & control , Viral Vaccines/immunology , Animals , Encephalitis Viruses, Tick-Borne , Female , Goat Diseases/virology , Goats , Vaccination
13.
Eur J Pain ; 21(5): 949, 2017 05.
Article in English | MEDLINE | ID: mdl-28407392

Subject(s)
Chronic Pain , Reward , Humans
14.
J Comp Pathol ; 156(4): 400-408, 2017 May.
Article in English | MEDLINE | ID: mdl-28433396

ABSTRACT

Spanish goat encephalitis virus (SGEV) is a member of the genus Flavivirus, family Flaviviridae, and causes encephalomyelitis in goats. The aim of this study was to determine whether sheep are susceptible to experimental challenge with SGEV by two different routes. The results show that SGEV can infect sheep by both the subcutaneous and intravenous routes, resulting in neurological clinical disease with extensive and severe histological lesions in the central nervous system. Lambs challenged subcutaneously developed more severe lesions on the ipsilateral side of the brain, but the lesion morphology was similar irrespective of the route of challenge. The clinical presentation, pathogenesis, lesion morphology and distribution shows that SGEV is very similar to louping ill virus (LIV) and therefore any disease control plan must take into account any host species and SGEV vectors as potential reservoirs. Furthermore, discriminatory diagnostics need to be applied to any sheep or goat suspected of disease due to any flavivirus in areas where SGEV and LIV co-exist.


Subject(s)
Encephalitis, Viral/veterinary , Flavivirus Infections/veterinary , Sheep Diseases/pathology , Sheep Diseases/virology , Animals , Brain/pathology , Brain/virology , Female , Sheep
15.
Zoonoses Public Health ; 64(2): 137-145, 2017 03.
Article in English | MEDLINE | ID: mdl-27591817

ABSTRACT

While technological advances in animal husbandry have facilitated increases in global meat production, the high density and geographic concentration of food animal production facilities pose risks of infectious disease transmission. The scale of the 2014-2015 highly pathogenic avian influenza H5N2 outbreak in the United States demonstrates the challenges in achieving pathogen control within and around industrial animal facilities using existing technologies. We discuss gaps in current practice in two specific systems within these facilities - ventilation and waste management - which are under-recognized as important drivers of microbial porosity. The development of innovative ventilation systems to reduce influx and efflux of pathogens is critically needed, and cross-sectoral partnerships should be incentivized to do so. Adapting current human biosolid treatment technologies for farm applications, reducing animal stocking density and shifting waste management responsibility from farmer to corporation would reduce risk from current manure management systems. While innovative approaches to functionally altering the industrial food animal production system remain important priorities to promote sustainability, our intention here is to identify gaps within the current system that allow for pathogen emergence and transmission and address specific areas in which technological, administrative or policy changes are necessary to mitigate these risks.


Subject(s)
Animal Husbandry/methods , Communicable Disease Control/methods , Livestock , Animals , Environmental Pollutants , Humans , Manure , Refuse Disposal , Zoonoses
16.
Vet Microbiol ; 178(3-4): 208-16, 2015 Aug 05.
Article in English | MEDLINE | ID: mdl-26009303

ABSTRACT

Despite the success of vaccination against myxoma virus, myxomatosis remains a problem on rabbit farms throughout Spain and Europe. In this study we set out to evaluate possible causes of myxoma virus (MYXV) vaccine failures addressing key issues with regard to pathogen, vaccine and vaccination strategies. This was done by genetically characterising MYXV field isolates from farm outbreaks, selecting a representative strain for which to assay its virulence and measuring the protective capability of a commercial vaccine against this strain. Finally, we compare methods (route) of vaccine administration under farm conditions and evaluate immune response in vaccinated rabbits. The data presented here show that the vaccine tested is capable of eliciting protection in rabbits that show high levels of seroconversion. However, the number of animals failing to seroconvert following subcutaneous vaccination may leave a large number of rabbits unprotected following vaccine administration. Successful vaccination requires the strict implication of workable, planned, on farm programs. Following this, analysis to confirm seroconversion rates may be advisable. Factors such as the wild rabbit reservoir, control of biting insects and good hygienic practices must be taken into consideration to prevent vaccine failures from occurring.


Subject(s)
Disease Outbreaks/veterinary , Myxoma virus/immunology , Myxomatosis, Infectious/epidemiology , Vaccination/veterinary , Viral Vaccines/immunology , Animal Husbandry , Animals , Base Sequence , Geography , Molecular Sequence Data , Myxoma virus/classification , Myxoma virus/genetics , Myxomatosis, Infectious/prevention & control , Rabbits , Sequence Analysis, DNA/veterinary , Spain/epidemiology , Virulence
17.
Arch Virol ; 160(3): 877-81, 2015 Mar.
Article in English | MEDLINE | ID: mdl-25577166

ABSTRACT

We report the complete genome sequences of two isolates (RHDV-N11 and CBVal16) of variant rabbit hemorrhagic disease virus (RHDVb). Isolate N11 was detected in young domestic animals during a rabbit hemorrhagic disease (RHD) outbreak that occurred in 2011 on a rabbit farm in Navarra, Spain, while CBVal16 was isolated from a wild rabbit found dead in Valpaços, Northern Portugal, a year later. The viral sequences reported show 84.8-85.1 % and 78.3-78.5 % identity to RHDVAst/89 and RCV-A1 MIC-07, representative members of the pathogenic genogroup 1 RHDV and apathogenic rabbit calicivirus, respectively. In comparison with other RHDV isolates belonging to the previously known genogroups 1-6, RHDVb shows marked phenotypic differences, as it causes disease preferentially in young rabbits under 40 days of age and shows modified red blood cell agglutination profiles as well as antigenic differences that allow this variant to escape protection by the currently available vaccines.


Subject(s)
Genome, Viral , Hemorrhagic Disease Virus, Rabbit/classification , Hemorrhagic Disease Virus, Rabbit/isolation & purification , RNA, Viral/genetics , Sequence Analysis, DNA , Animals , Caliciviridae Infections/veterinary , Caliciviridae Infections/virology , Cluster Analysis , Gene Order , Hemagglutination Tests , Hemorrhagic Disease Virus, Rabbit/genetics , Molecular Sequence Data , Open Reading Frames , Phylogeny , Portugal , Rabbits , Sequence Homology , Spain , Viral Proteins/genetics
18.
Chemosphere ; 86(7): 741-6, 2012 Feb.
Article in English | MEDLINE | ID: mdl-22113056

ABSTRACT

Chlorinated pesticides, PCBs and PBDEs were analysed in nine blubber samples of Atlantic spotted dolphins, Stenella frontalis, incidentally captured during fishing operations in southern and southeastern Brazil between 2005 and 2007. The majority of compounds analysed were detected, suggesting widespread contamination over the region. Although the samples came from a location far from main coastal industrial areas, the results revealed an influence from such sources. Therefore, levels of PCBs (774-23659 ng g(-1) lipid wt.) and PBDEs (23-1326 ng g(-1) lipid wt.) detected seem to be related to the movement of individuals throughout near-shore and offshore waters. The sample from a lactating female exhibited a lower level of contamination and a distinct pattern, indicating selective transfer favouring less lipophilic compounds.


Subject(s)
Environmental Monitoring/methods , Halogenated Diphenyl Ethers/analysis , Halogenated Diphenyl Ethers/chemistry , Halogenation , Polychlorinated Biphenyls/analysis , Polychlorinated Biphenyls/chemistry , Stenella/metabolism , Animals , Atlantic Ocean , Female , Halogenated Diphenyl Ethers/toxicity , Lactation/drug effects , Pesticide Residues/analysis , Pesticide Residues/chemistry , Pesticide Residues/toxicity , Polychlorinated Biphenyls/toxicity , Pregnancy
19.
J Colloid Interface Sci ; 325(1): 157-64, 2008 Sep 01.
Article in English | MEDLINE | ID: mdl-18597769

ABSTRACT

The interaction of macromolecules with artificial biomaterials may lead to potentially serious complications upon implantation into a biological environment. The interaction of one of the most widely used biomaterials, polyHEMA, with lysozyme, bovine serum albumin (BSA), and lactoferrin was investigated using quartz crystal microbalance (QCM). The concentration dependence of adsorption was measured for the aforementioned proteins individually as well as for lysozyme-BSA, and lysozyme-lactoferrin combinations. An extension of Voinova's viscoelastic model to n layers was used to create thickness-time graphs for adsorption. For each of lactoferrin and lysozyme, two distinctly different timescales of adsorption could be differentiated. However, the mechanisms of adsorption appeared to differ between the two. Negative dissipation shifts were measured for low concentrations of lysozyme, trending to positive dissipation at higher concentrations. This suggested that lysozyme was adsorbed initially into the matrix, stiffening the hydrogel, and later onto the surface of polyHEMA. Additionally, trials with commercial no-rub cleaning solutions indicated little added effectiveness over buffer solutions. Mixtures of proteins showed behaviour which differed in some cases from the simple combination of single protein adsorption experiments.


Subject(s)
Biosensing Techniques/methods , Lactoferrin/chemistry , Muramidase/chemistry , Polyhydroxyethyl Methacrylate/chemistry , Quartz/chemistry , Serum Albumin, Bovine/chemistry , Adsorption , Binding Sites , Biosensing Techniques/instrumentation , Buffers , Crystallization , Hydrogels/chemistry , Kinetics , Surface Properties
20.
Intern Med J ; 37(8): 529-35, 2007 Aug.
Article in English | MEDLINE | ID: mdl-17445012

ABSTRACT

BACKGROUND: Postural orthostatic tachycardia syndrome (POTS), a clinical syndrome of orthostatic intolerance characterized by excessive tachycardia and symptoms of cerebral hypoperfusion on standing, is not well recognized in Australia. The aim was to study the clinical symptomatology, results of autonomic testing and outcome in patients with POTS. METHODS: Sixteen subjects from a tertiary referral centre who met the criteria for POTS were studied between January 2003 and January 2006. Ten of these patients consented to be interviewed using a validated autonomic symptom questionnaire. Heart rate responses to deep breathing and the Valsalva manoeuvre were measured using Colin BP-508 machine (WR Medical Electronic Co., Stillwater, MN, USA). Tilt studies were carried out for 10 min to 80 degrees of head-up tilting. Patient outcome was assessed as functionally normal, able to stand 30 min without symptoms, able to work and carry out recreational activities or worse on follow up. RESULTS: The mean age of 10 subjects was 24.9 +/- 6.8 years, six being women. The mean duration of symptoms was 70.7 months (range 3-228 months). The common presenting orthostatic symptoms were light-headedness (100%), palpitations (90%), pallor (90%), weakness (80%) and clammy skin (80%). The mean heart rate increment during the tilt study was 51.7 +/- 14.3 b.p.m. The mean duration of follow up was 8.9 months (range 1-16 months). Only five patients were functioning normally at the follow-up visit. CONCLUSION: POTS is an underrecognized but persistent autonomic disorder in young patients with a variety of symptoms and variable outcome.


Subject(s)
Autonomic Nervous System Diseases/diagnosis , Posture , Tachycardia/diagnosis , Adolescent , Adult , Female , Humans , Male , Respiration , Syndrome , Tilt-Table Test , Valsalva Maneuver
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