Rosan Meyer

Dr. Rosan Meyer


Research Focus & Metrics

Academic Career Length

14Years (2013-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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13 August 2013 in Journal of Human Nutrition and Dietetics
Verified
Journal Article
Closed access
PDF file
RMRosan Meyer
Rosan Meyer
CKC. De Koker
C. De Koker
RDR. Dziubak
R. Dziubak
CVC. Venter
C. Venter
GDG. Dominguez‐Ortega
G. Dominguez‐Ortega
NSN. Shah
N. Shah

15 October 2014 in Journal of Gastroenterology and Hepatology
Verified
Journal Article
Closed access
PDF file
RMRosan Meyer
Rosan Meyer
NRNathalie Rommel
Nathalie Rommel
LOLukas Van Oudenhove
Lukas Van Oudenhove
CFCatharine Fleming
Catharine Fleming
RDRobert Dziubak
Robert Dziubak
NSNeil Shah
Neil Shah

1 January 2015 in Clinical and Translational Allergy
Verified
Journal Article
Open access
PDF file
ISIsabel J Skypala
Isabel J Skypala
CVCarina Venter
Carina Venter
RMRosan Meyer
Rosan Meyer
NJNicolette W. De Jong
Nicolette W. De Jong
AFAdam T Fox
Adam T Fox
TIThe Allergy‐Focussed Diet History Task Force Of The European Academy Of Allergy And Clinical Immunology
The Allergy‐Focussed Diet History Task Force Of The European Academy Of Allergy And Clinical Immunology
The disparity between reported and diagnosed food allergy makes robust diagnosis imperative. The allergy‐focussed history is an important starting point, but published literature on its efficacy is sparse. Using a structured approach to connect symptoms, suspected foods and dietary intake, a multi‐disciplinary task force of the European Academy of Allergy and Clinical Immunology developed paediatric and adult diet history tools. Both tools are divided into stages using traffic light labelling (red, amber and green). The red stage requires the practitioner to gather relevant information on symptoms, atopic history, food triggers, foods eaten and nutritional issues. The amber stage facilitates interpretation of the responses to the red‐stage questions, thus enabling the practitioner to prepare to move forward. The final green stage provides a summary template and test algorithm to support continuation down the diagnostic pathway. These tools will provide a standardised, practical approach to support food allergy diagnosis, ensuring that all relevant information is captured and interpreted in a robust manner. Future work is required to validate their use in diverse age groups, disease entities and in different countries, in order to account for differences in health care systems, food availability and dietary norms.

1 January 2013 in World Allergy Organization Journal
Verified
Journal Article
Open access
PDF file
RMRosan Meyer
Rosan Meyer
CFCatharine Fleming
Catharine Fleming
GDGloria Dominguez-Ortega
Gloria Dominguez-Ortega
KLKeith J. Lindley
Keith J. Lindley
LMLouise Michaelis
Louise Michaelis
NSNeil Shah
Neil Shah
Food protein induced gastrointestinal allergies are difficult to characterise due to the delayed nature of this allergy and absence of simple diagnostic tests. Diagnosis is based on an allergy focused history which can be challenging and often yields ambiguous results. We therefore set out to describe a group of children with this delayed type allergy, to provide an overview on typical profile, symptoms and management strategies. This retrospective analysis was performed at Great Ormond Street Children’s Hospital. Medical notes were included from 2002 – 2009 where a documented medical diagnosis of food protein induced gastrointestinal allergies was confirmed by an elimination diet with resolution of symptoms, followed by reintroduction with reoccurrence of symptoms. Age of onset of symptoms, diagnosis, current elimination diets and food elimination at time of diagnosis and co-morbidities were collected and parents were phoned again at the time of data collection to ascertain current allergy status. Data from 437 children were analysis. The majority (67.7%) of children had an atopic family history and 41.5% had atopic dermatitis at an early age. The most common diagnosis included, non-IgE mediated gastrointestinal food allergy (n = 189) and allergic enterocolitis (n = 154) with symptoms of: vomiting (57.8%), back-arching and screaming (50%), constipation (44.6%), diarrhoea (81%), abdominal pain (89.9%), abdominal bloating (73.9%) and rectal bleeding (38.5%). The majority of patients were initially managed with a milk, soy, egg and wheat free diet (41.7%). At a median age of 8 years, 24.7% of children still required to eliminate some of the food allergens. This large retrospective study on children with food induced gastrointestinal allergies highlights the variety of symptoms and treatment modalities used in these children. However, further prospective studies are required in this area of food allergy.

15 October 2015 in BMC Gastroenterology
Verified
Journal Article
Open access
PDF file
RMRosan Meyer
Rosan Meyer
RFRu Xin Melanie Foong
Ru Xin Melanie Foong
NTNikhil Thapar
Nikhil Thapar
SKStamatiki Kritas
Stamatiki Kritas
NSNeil Shah
Neil Shah
The choice of infant formula is thought to play an important role on gastric emptying (GE) in a variety of gastrointestinal disorders. It is known that many ingredients impact on GE, including the type of protein and level of hydrolysis. In clinical practice, feeds are often recommended due to putative improved GE related to the type of protein and level of hydrolysis, however whether this is scientifically justified still needs to be established. A systematic review comparing the impact of protein type and hydrolysis on GE in children was therefore performed. The Patient, Intervention, Comparison and Outcome system was used. A structured literature search was performed using the Preferred Reporting Items for Systematic Reviews and Meta-analysis guidelines, searching PubMed, Cochrane databases and Google Scholar from 1990 to 2014. We only included articles published in full text English language using specific search terms, including both scintigraphy and C13-octanoic acid breath test. We identified 126 publications of which 20 were eligible for inclusion but only 8 were included. Studies reviewed GE in both healthy children as well as those with neurodevelopmental delay and reflux. Two studies investigating GE of breast milk versus formula indicated a faster GE for breast milk. Four studies found that feeds containing whole whey in varying amounts emptied faster than predominant whole casein feeds and one study found no difference in GE. Five studies investigated a mix of whole versus hydrolysed protein and found conflicting results related to study population and hydrolysis. Breast milk has a faster GE than formula milk. Although there seems to be a trend towards whey feeds emptying faster, different methodologies, feed compositions and patient groups makes it difficult to draw firm conclusions. Future studies should be performed with comparable feeds in populations where increased GE may be of clinical benefit.

1 January 2015 in Clinical and Translational Allergy
Verified
Journal Article
Open access
PDF file
RMRosan Meyer
Rosan Meyer
CKClaire De Koker
Claire De Koker
RDRobert Dziubak
Robert Dziubak
ASAna‐Kristina Skrapac
Ana‐Kristina Skrapac
HGHeather Godwin
Heather Godwin
NSNeil Shah
Neil Shah
Background: The management of food allergy in children requires elimination of the offending allergens, which significantly contribute to micronutrient intake. Vitamin and mineral supplementation are commonly suggested as part of dietary management. However a targeted supplementation regime requires a complete nutritional assessment, which includes food diaries. Ideally these should be analysed using a computerised program, but are very time consuming. We therefore set out to evaluate current practice of vitamin and mineral supplementation in a cohort of children with non‐Immunoglobulin E (IgE) mediated food allergies.Methods: This prospective, observational study recruited children aged 4 weeks – 16 years, who required to follow an elimination diet for non‐IgE mediated allergies. Only children that improved according to a symptom score and were on a vitamin and/or mineral supplement were included. A 3‐day food diary including vitamin and mineral supplementation was recorded and analysed using Dietplan computer program. We assessed dietary adequacy with/without the supplement using the Dietary Reference Values.Results: One hundred‐and‐ten children had completed food diaries and of these 29% (32/110) were taking vitamin and/or mineral supplements. Children on hypoallergenic formulas were significantly (p = 0.007) less likely to be on supplements than those on alternative over‐the‐counter milks. Seventy‐one percent had prescribable supplements, suggested by a dietitian/physician. Sixty percent of those without a vitamin supplement had a low vitamin D intake, but low zinc, calcium and selenium was also common. Of the supplemented cohort many continued to be either under or over‐supplemented.Conclusion: This study has raised the question for the first time, whether clinicians dealing with paediatric food allergies should consider routine vitamin and/or mineral supplements in the light of deficient intake being so common in addition to being so difficult to predict.