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Spronk I, van Uden D, van Dammen L, van Baar ME, Nieuwenhuis M, Pijpe A, Visser I, van Schie C, van Zuijlen P, Haanstra T, Lansdorp CA. Outcomes that matter most to burn patients: A national multicentre survey study in the Netherlands. Burns 2024; 50:31-40. [PMID: 37985268 DOI: 10.1016/j.burns.2023.10.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 10/09/2023] [Accepted: 10/29/2023] [Indexed: 11/22/2023]
Abstract
BACKGROUND The use of patient-reported outcomes to improve burn care increases. Little is known on burn patients' views on what outcomes are most important, and about preferences regarding online Patient Reported Outcome Measures (PROMs). Therefore, this study assessed what outcomes matter most to patients, and gained insights into patient preferences towards the use of online PROMs. METHODS Adult patients (≥18 years old), 3-36 months after injury completed a survey measuring importance of outcomes, separately for three time periods: during admission, short-term (<6 months) and long-term (6-24 months) after burn injury. Both open and closed-ended questions were used. Furthermore, preferences regarding the use of patient-reported outcome measures in burn care were queried. RESULTS A total of 140 patients were included (response rate: 27%). 'Not having pain' and 'good wound healing' were identified as very important outcomes. Also, 'physical functioning at pre-injury level', 'being independent' and 'taking care of yourself' were considered very important outcomes. The top-ten of most important outcomes largely overlapped in all three time periods. Most patients (84%) had no problems with online questionnaires, and many (67%) indicated that it should take up to 15 minutes. Patients' opinions differed widely on the preferred frequency of follow-up. CONCLUSIONS Not having pain and good wound healing were considered very important during the whole recovery of burns; in addition, physical functioning at pre-injury level, being independent, and taking care of yourself were deemed very important in the short and long-term. These outcomes are recommended to be used in burn care and research, although careful selection of outcomes remains crucial as patients prefer online questionnaires up to 15 minutes.
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Affiliation(s)
- I Spronk
- Erasmus MC University Medical Centre Rotterdam, Department of Public Health, Rotterdam, the Netherlands; Association of Dutch Burn Centres, Maasstad Hospital, Rotterdam, the Netherlands; Dutch Burns Foundation, Beverwijk, the Netherlands.
| | - D van Uden
- Association of Dutch Burn Centres, Maasstad Hospital, Rotterdam, the Netherlands
| | - L van Dammen
- Dutch Burns Foundation, Beverwijk, the Netherlands
| | - M E van Baar
- Erasmus MC University Medical Centre Rotterdam, Department of Public Health, Rotterdam, the Netherlands; Association of Dutch Burn Centres, Maasstad Hospital, Rotterdam, the Netherlands
| | - M Nieuwenhuis
- Association of Dutch Burn Centres, Martini Hospital, Groningen, the Netherlands; University of Groningen, University Medical Centre Groningen, Department of Human Movement Sciences, Groningen, the Netherlands; Hanze University of Applied Sciences, Groningen Research Group Healthy Ageing Allied Health Care and Nursing, Groningen, the Netherlands
| | - A Pijpe
- Burn Centre Red Cross Hospital, Beverwijk, the Netherlands; Amsterdam UMC location Vrije Universiteit Amsterdam, Department of Plastic Reconstructive and Hand Surgery, Amsterdam, the Netherlands; Association of Dutch Burn Centres, Red Cross Hospital, Beverwijk, the Netherlands; Amsterdam Movement Sciences (AMS) Institute Amsterdam UMC, Amsterdam, the Netherlands
| | - I Visser
- Dutch Association of Burn Survivors, Beverwijk, the Netherlands
| | - C van Schie
- Dutch Burns Foundation, Beverwijk, the Netherlands
| | - P van Zuijlen
- Burn Centre Red Cross Hospital, Beverwijk, the Netherlands; Amsterdam UMC location Vrije Universiteit Amsterdam, Department of Plastic Reconstructive and Hand Surgery, Amsterdam, the Netherlands; Amsterdam Movement Sciences (AMS) Institute Amsterdam UMC, Amsterdam, the Netherlands; Department of Plastic Reconstructive and Hand Surgery, Red Cross Hospital, Beverwijk, the Netherlands; Amsterdam UMC location University of Amsterdam, Paediatric Surgical Centre, Emma Children's Hospital, Amsterdam, the Netherlands
| | - T Haanstra
- Dutch Burns Foundation, Beverwijk, the Netherlands; Department of Dermal Therapy, Faculty of Health Nutrition & Sport, The Hague University of Applied Sciences, The Hague, the Netherlands; Research Group Relational Care Centre of Expertise Health Innovation, The Hague University of Applied Sciences, The Hague, the Netherlands
| | - C A Lansdorp
- Amsterdam UMC location Vrije Universiteit Amsterdam, Department of Plastic Reconstructive and Hand Surgery, Amsterdam, the Netherlands
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Lichtenberg L, Visser I, Raijmakers MEJ. Latent Markov Models to Test the Strategy Use of 3-Year-Olds in a Rule-Based Feedback-Learning Task. Multivariate Behav Res 2023:1-14. [PMID: 36762914 DOI: 10.1080/00273171.2023.2170963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
This study is the first to investigate how 3-year-olds learn simple rules from feedback using the Toddler Card Sorting Task (TCST). To account for intra- and inter- individual differences in the learning process, latent Markov models were fitted to the time series of accuracy responses using maximum likelihood techniques (Visser et al., 2002). In a first, exploratory study (N = 110, 3- to 5-years olds) a considerable group of 3-year olds applied a hypothesis testing learning strategy. A second study confirmed these results with a preregistered study (3-years olds, N = 60). Under supportive learning conditions, a majority of 3-year- olds was capable of hypothesis testing. Furthermore, older children and those with bigger working memory capacities were more likely to use hypothesis testing, even though the latter group perseverated more than younger children or those with smaller working memory capacities. 3-year-olds are more advanced feedback-learners than assumed.
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Affiliation(s)
- L Lichtenberg
- Department of Developmental Psychology, University of Amsterdam, Amsterdam, The Netherlands
| | - I Visser
- Department of Developmental Psychology, University of Amsterdam, Amsterdam, The Netherlands
| | - M E J Raijmakers
- Department of Developmental Psychology, University of Amsterdam, Amsterdam, The Netherlands
- Educational Studies and Learn!, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
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Fritz P, Bera B, van den Berg J, Visser I, Kleijn J, Boom R, Schroën C. Electrode Surface Potential-Driven Protein Adsorption and Desorption through Modulation of Electrostatic, van der Waals, and Hydration Interactions. Langmuir 2021; 37:6549-6555. [PMID: 34008985 PMCID: PMC8280736 DOI: 10.1021/acs.langmuir.1c00828] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 04/22/2021] [Indexed: 05/29/2023]
Abstract
When proteins in aqueous solutions are exposed to solid substrates, they adsorb due to the dynamic interplay of electrostatic, van der Waals, and hydration interactions and do so in a rather irreversible fashion, which makes protein recovery troublesome. Here, we use a gold electrode as the solid substrate and modulate the surface potential to systematically induce protein adsorption as well as partial desorption. We use different methods such as surface plasmon resonance, atomic force microscopy, and electrowetting and show that biasing the electrode to more negative potentials (by -0.4 V compared to the open-circuit potential at pH 6) results in an increased adsorption barrier of 6 kJ mol-1 for the negatively charged protein β-lactoglobulin. Further, we clearly demonstrate that this is due to an increased double layer potential of -0.06 V and an increase in hydration repulsion. This indicates that an electric potential can directly influence surface interactions and thus induce partial β-lactoglobulin desorption. These observations can be the basis for biosensors as well as separation technologies that use only one trigger to steer protein ad- and desorption, which is low in energy requirement and does not generate large waste streams, as is the case for standard protein separation technologies.
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Affiliation(s)
- P.A. Fritz
- Laboratory
of Food Process Engineering, Wageningen
University, Bornse Weilanden
9, Wageningen 6708 WG, The Netherlands
- School
of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459, Singapore
| | - B. Bera
- Laboratory
of Food Process Engineering, Wageningen
University, Bornse Weilanden
9, Wageningen 6708 WG, The Netherlands
| | - J. van den Berg
- Laboratory
of Food Process Engineering, Wageningen
University, Bornse Weilanden
9, Wageningen 6708 WG, The Netherlands
| | - I. Visser
- Laboratory
of Food Process Engineering, Wageningen
University, Bornse Weilanden
9, Wageningen 6708 WG, The Netherlands
| | - J.M. Kleijn
- Physical
Chemistry and Soft Matter, Wageningen University, Stippeneng 4, Wageningen 6708 WE, The
Netherlands
| | - R.M. Boom
- Laboratory
of Food Process Engineering, Wageningen
University, Bornse Weilanden
9, Wageningen 6708 WG, The Netherlands
| | - C.G.P.H. Schroën
- Laboratory
of Food Process Engineering, Wageningen
University, Bornse Weilanden
9, Wageningen 6708 WG, The Netherlands
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Verboeket SO, Wit FW, Kirk GD, Drummond MB, van Steenwijk RP, van Zoest RA, Nellen JF, Schim van der Loeff MF, Reiss P, Reiss P, Wit FWNM, van der Valk M, Schouten J, Kooij KW, van Zoest RA, Verheij E, Verboeket SO, Elsenga BC, Prins M, van der Loeff MFS, del Grande L, Olthof V, Dijkstra M, Zaheri S, Hillebregt MMJ, Ruijs YMC, Benschop DP, el Berkaoui A, Kootstra NA, Harskamp-Holwerda AM, Maurer I, Mangas Ruiz MM, Girigorie AF, Boeser-Nunnink B, Zikkenheiner W, Janssen FR, Geerlings SE, Goorhuis A, Hovius JWR, Nellen FJB, van der Poll T, Prins JM, Reiss P, van der Valk M, Wiersinga WJ, van Vugt M, de Bree G, van Eden J, van Hes AMH, Pijnappel FJJ, Weijsenfeld A, Smalhout S, van Duinen M, Hazenberg A, Postema PG, Bisschop PHLT, Serlie MJM, Lips P, Dekker E, van der Velde N, Willemsen JMR, Vogt L, Schouten J, Portegies P, Schmand BA, Geurtsen GJ, Verbraak FD, Demirkaya N, Visser I, Schadé A, Nieuwkerk PT, Langebeek N, van Steenwijk RP, Dijkers E, Majoie CBLM, Caan MWA, van Lunsen HW, Nievaard MAF, van den Born BJH, Stroes ESG, Mulder WMC, van Oorspronk S. Reduced Forced Vital Capacity Among Human Immunodeficiency Virus-Infected Middle-Aged Individuals. J Infect Dis 2018; 219:1274-1284. [DOI: 10.1093/infdis/jiy653] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 11/08/2018] [Indexed: 02/01/2023] Open
Affiliation(s)
- Sebastiaan O Verboeket
- Amsterdam UMC, University of Amsterdam, Departments of Global Health and Internal Medicine, Amsterdam Infection and Immunity Institute and Amsterdam Public Health Research Institute, Amsterdam, The Netherlands
- Amsterdam Institute for Global Health and Development, Amsterdam, The Netherlands
| | - Ferdinand W Wit
- Amsterdam UMC, University of Amsterdam, Departments of Global Health and Internal Medicine, Amsterdam Infection and Immunity Institute and Amsterdam Public Health Research Institute, Amsterdam, The Netherlands
- Amsterdam Institute for Global Health and Development, Amsterdam, The Netherlands
- HIV Monitoring Foundation, Amsterdam, The Netherlands
| | - Greg D Kirk
- Department of Epidemiology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland
| | - M Bradley Drummond
- Division of Pulmonary and Critical Care Medicine, University of North Carolina, Chapel Hill
| | | | - Rosan A van Zoest
- Amsterdam UMC, University of Amsterdam, Departments of Global Health and Internal Medicine, Amsterdam Infection and Immunity Institute and Amsterdam Public Health Research Institute, Amsterdam, The Netherlands
- Amsterdam Institute for Global Health and Development, Amsterdam, The Netherlands
| | - Jeannine F Nellen
- Amsterdam UMC, University of Amsterdam, Departments of Global Health and Internal Medicine, Amsterdam Infection and Immunity Institute and Amsterdam Public Health Research Institute, Amsterdam, The Netherlands
| | - Maarten F Schim van der Loeff
- Amsterdam UMC, University of Amsterdam, Departments of Global Health and Internal Medicine, Amsterdam Infection and Immunity Institute and Amsterdam Public Health Research Institute, Amsterdam, The Netherlands
- Department of Infectious Diseases, Public Health Service of Amsterdam, The Netherlands
| | - Peter Reiss
- Amsterdam UMC, University of Amsterdam, Departments of Global Health and Internal Medicine, Amsterdam Infection and Immunity Institute and Amsterdam Public Health Research Institute, Amsterdam, The Netherlands
- Amsterdam Institute for Global Health and Development, Amsterdam, The Netherlands
- HIV Monitoring Foundation, Amsterdam, The Netherlands
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Mocking RJT, Pellikaan CM, Lok A, Assies J, Ruhé HG, Koeter MW, Visser I, Bockting CL, Olff M, Schene AH. DHEAS and cortisol/DHEAS-ratio in recurrent depression: State, or trait predicting 10-year recurrence? Psychoneuroendocrinology 2015; 59:91-101. [PMID: 26036454 DOI: 10.1016/j.psyneuen.2015.05.006] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Revised: 05/12/2015] [Accepted: 05/12/2015] [Indexed: 10/23/2022]
Abstract
BACKGROUND Major depressive disorder (MDD) has been associated with low dehydroepiandrosterone-sulphate (DHEAS), - particularly relative to high cortisol - although conflicting findings exist. Moreover, it is unclear whether low DHEAS is only present during the depressive state, or manifests as a trait that may reflect vulnerability for recurrence. Therefore, we longitudinally tested whether low DHEAS and high cortisol/DHEAS-ratio in recurrent MDD (I) reflects a trait, and/or (II) varies with depressive state. In addition, we tested associations with (III) previous MDD-episodes, (IV) prospective recurrence, and (V) effects of cognitive therapy. METHODS At study-entry, we cross-sectionally compared morning and evening salivary DHEAS and molar cortisol/DHEAS-ratio of 187 remitted recurrent MDD-patients with 72 matched controls. Subsequently, patients participated in an 8-week randomized controlled cognitive therapy trial. We repeated salivary measures after 3 months and 2 years. We measured clinical symptoms during a 10-year follow-up. RESULTS Remitted patients showed steeper diurnal DHEAS-decline (p<.005) and a flatter diurnal profile of cortisol/DHEAS-ratio (p<.001) than controls. We found no state-effect in DHEAS or cortisol/DHEAS-ratio throughout follow-up and no association with number of previous episodes. Higher morning cortisol/DHEAS-ratio predicted shorter time till recurrence over the 10-year follow-up in interaction with the effects of cognitive therapy (p<.05). Finally, cognitive therapy did not influence DHEAS or cortisol/DHEAS-ratio. CONCLUSIONS Diurnal profiles of DHEAS and cortisol/DHEAS-ratio remain equally altered in between depressive episodes, and may predict future recurrence. This suggests they represent an endophenotypic vulnerability trait rather than a state-effect, which provides a new road to understand recurrent depression and its prevention. TRIAL REGISTRATION www.isrctn.com/ISRCTN68246470.
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Affiliation(s)
- R J T Mocking
- Program for Mood disorders, Department of Psychiatry, Academic Medical Center, University of Amsterdam, The Netherlands.
| | - C M Pellikaan
- Program for Mood disorders, Department of Psychiatry, Academic Medical Center, University of Amsterdam, The Netherlands
| | - A Lok
- Program for Mood disorders, Department of Psychiatry, Academic Medical Center, University of Amsterdam, The Netherlands; Arq Psychotrauma Expert Group, Diemen, The Netherlands
| | - J Assies
- Program for Mood disorders, Department of Psychiatry, Academic Medical Center, University of Amsterdam, The Netherlands
| | - H G Ruhé
- Program for Mood disorders, Department of Psychiatry, Academic Medical Center, University of Amsterdam, The Netherlands; University Medical Center Groningen, Program for Mood and Anxiety Disorders, Department of Psychiatry, The Netherlands
| | - M W Koeter
- Program for Mood disorders, Department of Psychiatry, Academic Medical Center, University of Amsterdam, The Netherlands
| | - I Visser
- Program for Mood disorders, Department of Psychiatry, Academic Medical Center, University of Amsterdam, The Netherlands
| | - C L Bockting
- Department of Clinical Psychology, University of Groningen, The Netherlands; Department of Clinical and Health Psychology, Utrecht University, The Netherlands
| | - M Olff
- Arq Psychotrauma Expert Group, Diemen, The Netherlands; Center for Psychological Trauma, Department of Psychiatry, Academic Medical Center, University of Amsterdam, The Netherlands
| | - A H Schene
- Program for Mood disorders, Department of Psychiatry, Academic Medical Center, University of Amsterdam, The Netherlands; Department of Psychiatry, Radboud University Medical Center, Nijmegen, The Netherlands; Donders Institute for Brain, Cognition and Behavior, Radboud University, Nijmegen, The Netherlands
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Schouten J, Wit FW, Stolte IG, Kootstra NA, van der Valk M, Geerlings SE, Prins M, Reiss P, Reiss P, Wit FWNM, van der Valk M, Schouten J, Kooij KW, van Zoest RA, Elsenga BC, Prins M, Stolte IG, Martens M, Moll S, Berkel J, Moller L, Visser GR, Welling C, Zaheri S, Hillebregt MMJ, Gras LAJ, Ruijs YMC, Benschop DP, Reiss P, Kootstra NA, Harskamp-Holwerda AM, Maurer I, Mangas Ruiz MM, Girigorie AF, van Leeuwen E, Janssen FR, Heidenrijk M, Schrijver JHN, Zikkenheiner W, Wezel M, Jansen-Kok CSM, Geerlings SE, Godfried MH, Goorhuis A, van der Meer JTM, Nellen FJB, van der Poll T, Prins JM, Reiss P, van der Valk M, Wiersinga WJ, Wit FWNM, van Eden J, Henderiks A, van Hes AMH, Mutschelknauss M, Nobel HE, Pijnappel FJJ, Westerman AM, de Jong J, Postema PG, Bisschop PHLT, Serlie MJM, Lips P, Dekker E, de Rooij SEJA, Willemsen JMR, Vogt L, Schouten J, Portegies P, Schmand BA, Geurtsen GJ, ter Stege JA, Klein Twennaar M, van Eck-Smit BLF, de Jong M, Richel DJ, Verbraak FD, Demirkaya N, Visser I, Ruhe HG, Nieuwkerk PT, van Steenwijk RP, Dijkers E, Majoie CBLM, Caan MWA, Su T, van Lunsen HW, Nievaard MAF, van den Born BJH, Stroes ESG, Mulder WMC. Cross-sectional Comparison of the Prevalence of Age-Associated Comorbidities and Their Risk Factors Between HIV-Infected and Uninfected Individuals: The AGEhIV Cohort Study. Clin Infect Dis 2014; 59:1787-97. [DOI: 10.1093/cid/ciu701] [Citation(s) in RCA: 498] [Impact Index Per Article: 49.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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Assies J, Lok A, Bockting CL, Weverling GJ, Lieverse R, Visser I, Abeling NGGM, Duran M, Schene AH. Fatty acids and homocysteine levels in patients with recurrent depression: an explorative pilot study. Prostaglandins Leukot Essent Fatty Acids 2004; 70:349-56. [PMID: 15041026 DOI: 10.1016/j.plefa.2003.12.009] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/18/2003] [Indexed: 10/26/2022]
Abstract
Major depressive disorders (MDD) and cardiovascular disease are mutually associated. They share signs and symptoms of the "metabolic syndrome". Two observations that may be causally related with the metabolic syndrome and therefore with both MDD and cardiovascular disease are a decrease in omega-3 polyunsaturated fatty acids (PUFAs) and a rise in plasma homocysteine (tHcy) levels. Both the rise in tHcy and the decrease in omega-3 PUFAs may be associated with enhanced lipid peroxidation. We exploratively studied 44 randomly chosen patients out of a cohort of 134 patients with the recurrent form of MDD (MDD-R). We measured tHcy levels together with saturated FAs, monounsaturated fatty acids (MUFAs) and PUFAs of the omega-3, omega-6 and omega-9 series in plasma and erythrocytes. Levels were compared with laboratory reference values. The main findings were a decrease in the erythrocytes of C22:5omega-3, C22:6omega-3, C24:1omega-9 and C20:3omega-9 and in the plasma a decrease in C24:1omega-9 and C20:3omega-9. The only significant association we found was between the total of omega-6 fatty acids and plasma tHcy. The FA alterations were found in patients although most of them were clinically recovered, suggesting that the alterations may represent a biological" trait" marker for recurrent depression.
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Affiliation(s)
- J Assies
- Department of Psychiatry, Academic Medical Centre, Tafelbergweg 25, Amsterdam 1105BC, The Netherlands.
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Harkema W, Visser I, Soede NM, Kemp B, Woelders H. Capacity of boar spermatozoa to bind zona pellucida proteins in vitro in relation to fertilization rates in vivo. Theriogenology 2004; 61:227-38. [PMID: 14662124 DOI: 10.1016/s0093-691x(03)00212-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The purpose of this study was to determine variation among boars in the percentage of sperm in an ejaculate that express enhanced binding of zona pellucida proteins during treatment for capacitation in vitro, and to determine whether this relates to fertilizing ability in vivo. Ejaculates (n=35) were collected from 12 boars. A sample of each ejaculate was treated for capacitation in vitro. During incubation, the zona binding ability of spermatozoa was assessed at regular intervals with fluorescein-conjugated solubilized zona pellucida proteins (FITC-sZP) and propidium iodide, using a flow cytometer. After incubation, a percentage of the sperm had enhanced FITC-sZP binding. The percentage of viable sperm with enhanced FITC-sZP binding, expressed as a percentage of the total sperm population, increased rapidly over the first 60 min and thereafter reached a plateau after 120-180 min. Averaged over all ejaculates, the percentage at 180 min was 46% (range 27-61%); this percentage was significantly different among boars. However, the variation between ejaculates within a boar was relatively small. There was no significant boar effect on the rate at which the percentage of viable cells with enhanced FITC-sZP binding reached the maximum. In ejaculates (n=14) from four boars (selected from the group of 12), we investigated the increase in the percentage of viable sperm with enhanced sZP binding during treatment for capacitation in vitro in relation to the ability to fertilize in vivo. Sows (n=44) were inseminated 4 h after ovulation with a suboptimal insemination dose (0.5x10(9) spermatozoa). Time of ovulation was determined using transrectal ultrasonography and sows were killed at 120 h after ovulation. The percentage of fertilized oocytes, embryo development, and numbers of accessory spermatozoa were determined. The percentage of spermatozoa that were viable and showed enhanced sZP binding after 180 min of incubation was 48 +/- 12% (range 28-56%). The percentage of fertilized oocytes was 85 +/- 27% and 64% of the sows had 100% fertilized oocytes. The percentage of sows with 100% fertilized oocytes correlated well (P< or =0.05, R2=0.98) with the percentage of viable spermatozoa with enhanced FITC-sZP binding after capacitation in vitro.
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Affiliation(s)
- W Harkema
- Institute for Animal Science and Health (ID-Lelystad), PO Box 65, 8200 AB Lelystad, The Netherlands
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Abstract
Three methods for computing confidence intervals (CIs) of hidden Markov model parameters are compared in the context of 'long' time series, T > 100, namely likelihood profiling, bootstrapping and CIs based on a finite-differences approximation to the Hessian. First it is shown that with 'long' time series computing the exact Hessian is not feasible. In simulation studies quadratic and cubic interpolation polynomials for the likelihood profiles are compared. Likelihood profiling and bootstrapping produce similar CIs, whereas the CIs from the finite-differences approximation of the Hessian are mostly too small.
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Affiliation(s)
- I Visser
- Department of Psychology, University of Amsterdam, The Netherlands.
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10
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Domingo M, Vilafranca M, Visa J, Prats N, Trudgett A, Visser I. Evidence for chronic morbillivirus infection in the Mediterranean striped dolphin (Stenella coeruleoalba). Vet Microbiol 1995; 44:229-39. [PMID: 8588317 DOI: 10.1016/0378-1135(95)00016-4] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
In the summer of 1990 an epizootic infection caused by a morbillivirus (DMV) killed several thousand striped dolphins (Stenella coeruleoalba) in the Mediterranean Sea. In 1991 and 1992 the epizootic reached Italian and Greek waters. The infection by DMV in the acute period of the epizootic caused encephalitis, pneumonia and depletion of lymph nodes. After 1990, the systemic infection apparently disappeared from the Catalonian coast, giving way to cases of chronic infection of the CNS. Dolphins that died between 1991 and May 1994 were necropsied, and investigated for lesions due to DMV, and for the presence of morbillivirus antigen in tissues. Encephalitis occurred in 6 dolphins in which DMV antigen was demonstrated in the CNS and which were without lesions or antigen in other, non-nervous tissues. Inflammatory lesions, gliosis, and DMV antigen decreased in density and amount from cerebral grey matter, through the thalamic areas to the medulla oblongata. The cerebellum was usually spared. Lesions consisted of non-suppurative encephalitis, with diffuse gliosis and glial nodules and neuronophagia, and loss of neurons. Perivascular cuffing of lymphocytes and plasma cells was present in the cerebral cortex and the white matter beneath the cortex. Multinucleate syncytia were not detected in any of the dolphins. The haemagglutinin of DMV was detected mainly in neurons in the cerebral cortical areas. There was no clear relationship between the presence and amount of DMV antigen and the density or chronicity of lesions. Viral inclusions were seen in haematoxylin and eosin stained sections in 3/6 dolphins, principally in the nucleus and the cytoplasm of neurons. In the immunoperoxidase stained sections, dense granular deposits of chromogen, similar to viral inclusions, were evident in all 6 dolphins. The change in the distribution of lesions and of DMV antigen, from systemic to localized in the CNS, and the clustering of systemic DMV infections in the first four months of the epizootic, giving rise to sporadic occurrence of local CNS infection in the subsequent four years, as well as the chronic nature of the CNS lesions, which closely resembles subacute sclerosing panencephalitis, strongly support the existence of a chronic morbillivirus infection in the striped dolphin, as a delayed consequence of the 1990 epizootic.
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Affiliation(s)
- M Domingo
- Dept. of Pathology, Veterinary Faculty, Barcelona, Spain
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van den Berg-Loonen EM, Siegers H, Milde J, Visser I, Westera A, van Embden E, Englefriet CP. Antigen PR - another allele of the HLA-B locus. Tissue Antigens 1979; 14:343-6. [PMID: 94706 DOI: 10.1111/j.1399-0039.1979.tb00859.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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