1.Paediatric living-donor liver and kidney transplantation during COVID-19.
Vidyadhar Padmakar MALI ; Marion AW ; Kar Hui NG ; Sivaramakrishnan Venkatesh KARTHIK ; Michelle TAN ; Sharon TEO ; Perry Yew Weng LAU ; Yoke Lin NYO ; Dale Ser Kheng Lincoln LOH ; Ho Yee TIONG ; Seng Hock QUAK ; Hui Kim YAP
Annals of the Academy of Medicine, Singapore 2022;51(2):119-121
2.Prevalence and Management of Functional Gastrointestinal Disorders in Infants: An Asian Perspective
Wei CAI ; Lalit BHARADIA ; Mohammad JUFFRIE ; Fook Choe CHEAH ; Seng Hock QUAK ; Vitaya TITAPANT ; Ruurd VAN ELBURG ; Thomas LUDWIG
Pediatric Gastroenterology, Hepatology & Nutrition 2018;21(1):76-77
No abstract available.
Asian Continental Ancestry Group
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Gastrointestinal Diseases
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Humans
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Infant
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Prevalence
3.An Electronic Questionnaire Survey Evaluating the Perceived Prevalence and Practices of Lactose Intolerance in 1 to 5 Year Old Children in South East Asia.
Michelle Li Nien TAN ; Leilani MUHARDI ; Seksit OSATAKUL ; Badriul HEGAR ; Yvan VANDENPLAS ; Thomas LUDWIG ; Jacques BINDELS ; Eline M VAN DER BEEK ; Seng Hock QUAK
Pediatric Gastroenterology, Hepatology & Nutrition 2018;21(3):170-175
PURPOSE: Lactose intolerance (LI) is perceived to be frequent in Asia and has been reported to have considerable impact on dietary intake, nutritional status and the quality of life. We aimed to gather information from healthcare professionals on the perceived incidence, diagnosis and management of LI in 1 to 5 year old children in Southeast Asia. METHODS: An anonymous electronic survey was sent randomly among healthcare professionals registered in the database of the pediatric societies in Thailand, Indonesia, and Singapore between June and October 2016. RESULTS: In total, 259 health care professionals responded of which 45.5% (n=118) were from Thailand, 37.4% (n=97) from Indonesia and 16.9% (n=44) from Singapore. Of the participants who responded (n=248), primary LI prevalence among children 1 to 3 years of age was estimated to be less than 5% by 56.8%. However, about 18.9% (n=47) answered they did not know/unsure. Regarding secondary LI, 61.6% of respondents (n=153) estimated the prevalence to be less than 15%. But again, 10.8% (n=27) answered they did not know or unsure. Rotavirus gastroenteritis was ranked as the top cause for secondary LI. There was considerable heterogeneity in the diagnostic methods used. The majority of respondents (75%) recommended lactose-free milk to manage primary and secondary LI. CONCLUSION: More education/training of pediatricians on this topic and further epidemiological studies using a more systematic approach are required.
Anonyms and Pseudonyms
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Asia
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Asia, Southeastern
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Child*
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Delivery of Health Care
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Diagnosis
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Epidemiologic Studies
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Far East*
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Gastroenteritis
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Health Personnel
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Humans
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Incidence
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Indonesia
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Lactose Intolerance*
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Lactose*
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Milk
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Nutritional Status
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Population Characteristics
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Prevalence*
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Quality of Life
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Rotavirus
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Singapore
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Surveys and Questionnaires
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Thailand
4.Eosinophilic oesophagitis in children: an uncommon occurrence in a predominantly Chinese population in Singapore.
Li Nien Michelle TAN ; Supriya SRIVASTAVA ; Ming TEH ; Seng Hock QUAK ; Marion M AW
Singapore medical journal 2017;58(4):218-222
INTRODUCTIONWe aimed to determine the prevalence and clinical manifestations of eosinophilic oesophagitis (EoE) in children who presented to a tertiary care hospital in Singapore.
METHODSWe conducted a retrospective review of all oesophageal biopsies taken during oesophagogastroduodenoscopy (OGD) from March 2010 to December 2011. The patients' demographics and clinical characteristics were collected. Biopsies were reviewed by a single pathologist who was blinded to the original reports, using the current consensus criteria for the histological diagnosis of EoE.
RESULTSOf the 88 children who had biopsies during OGD, 4 (4.5%) children (three boys, one girl; three Chinese, one Caucasian) were diagnosed with EoE. Their median age was 9.5 (range 4.0-12.0) years. The main clinical presentations were abdominal pain (in the three older children) and vomiting (in the youngest child). Three children had a history of atopy. Three children were diagnosed with EoE in the original histology reports, while one was diagnosed after the second review following histology demonstrating > 15 eosinophil granulocytes per high power field and microabscess formation. Endoscopy findings revealed oesophagitis in two children, one of whom was already on acid suppression therapy. Although three children were started on acid suppression therapy, they continued to be symptomatic. One child was also treated with swallowed fluticasone and two with food allergen avoidance, resulting in symptom improvement.
CONCLUSIONAlthough EoE is uncommon in Singapore, greater awareness is needed among family physicians and general paediatricians. Paediatric gastroenterologists should alert pathologists when sending biopsy specimens that are suspicious for EoE.
5.Efficacy, Immunogenicity and Safety of a Human Rotavirus Vaccine RIX4414 in Singaporean Infants.
Kong Boo PHUA ; Fong Seng LIM ; Seng Hock QUAK ; Bee Wah LEE ; Yee Leong TEOH ; Pemmaraju V SURYAKIRAN ; Htay Htay HAN ; Hans L BOCK
Annals of the Academy of Medicine, Singapore 2016;45(2):44-50
INTRODUCTIONThis was the first study conducted to evaluate the efficacy of 2 oral doses of the human rotavirus vaccine, RIX4414 in Singaporean infants during the first 3 years of life.
MATERIALS AND METHODSHealthy infants, 11 to 17 weeks of age were enrolled in this randomised (1:1), double-blinded, placebo-controlled study to receive 2 oral doses of RIX4414 vaccine/placebo following a 0-, 1-month schedule. Vaccine efficacy against severe rotavirus (RV) gastroenteritis (Vesikari score ≥11) caused by wild-type RV strains from a period starting from 2 weeks post-Dose 2 until 2 and 3 years of age was calculated with 95% confidence interval (CI). Immunogenicity and safety of the vaccine were also assessed.
RESULTSOf 6542 infants enrolled, 6466 were included in the efficacy analysis and a subset of 100 infants was included in the immunogenicity analysis. Fewer severe RV gastroenteritis episodes were reported in the RIX4414 group when compared to placebo at both 2 and 3 year follow-up periods. Vaccine efficacy against severe RV gastroenteritis at the respective time points were 93.8% (95% CI, 59.9 to 99.9) and 95.2% (95% CI, 70.5 to 99.9). One to 2 months post-Dose 2 of RIX4414, 97.5% (95% CI, 86.8 to 99.9) of infants seroconverted for anti-RV IgA antibodies. The number of serious adverse events recorded from Dose 1 until 3 years of age was similar in both groups.
CONCLUSIONTwo oral doses of RIX4414 vaccine was immunogenic and provided high level of protection against severe RV gastroenteritis in Singaporean children, during the first 3 years of life when the disease burden is highest.
Antibodies, Viral ; immunology ; Double-Blind Method ; Female ; Gastroenteritis ; prevention & control ; virology ; Humans ; Immunogenicity, Vaccine ; Immunoglobulin A ; immunology ; Infant ; Male ; Rotavirus ; immunology ; Rotavirus Infections ; prevention & control ; Rotavirus Vaccines ; immunology ; therapeutic use ; Singapore ; Treatment Outcome ; Vaccines, Attenuated ; immunology ; therapeutic use
7.Childhood autoimmune hepatitis in a paediatric unit of a tertiary care hospital.
Ai Sha LOW ; Michelle TAN ; Agatha GARCIA ; Marion AW ; Seng Hock QUAK
Singapore medical journal 2014;55(12):648-651
INTRODUCTIONAlthough childhood autoimmune hepatitis (AIH) has been extensively investigated in the West, data on AIH in the East is lacking. We aimed to investigate AIH's clinical, biochemical and histological features, as well as its outcomes, in one of Singapore's two major paediatric units.
METHODSThis was a retrospective study of children diagnosed with AIH in the paediatric unit of National University Hospital, Singapore, over the last 12 years. Children with de novo AIH after liver transplantation were excluded. The demographic and clinical features of the patients, and their laboratory, treatment and clinical outcomes were reviewed.
RESULTSThis study comprised ten patients (six females, four males), with a median age of 5.1 (range 2.1-13.8) years at diagnosis. Five patients had inflammatory bowel disease (IBD). Seven patients had type 1 AIH, and three had autoimmune sclerosing cholangitis (ASC) and IBD; none had type 2 AIH. The median level of aspartate aminotransferase at diagnosis was 183 (range 45-2,649) U/L. Prednisolone 1 mg/kg/day was prescribed at diagnosis for eight patients. Two patients were lost to follow-up and were treated symptomatically when they re-presented with end-stage liver disease. Azathioprine or mycophenolate mofetil was prescribed after 3-7 months of treatment. Normalisation of aminotransferase levels took an average of 5.3 (range 1-39) months.
CONCLUSIONAIH is a rare but important cause of liver pathology. Children in this region with elevated aminotransferases or unexplained hepatomegaly should be screened for AIH.
Adolescent ; Aspartate Aminotransferases ; blood ; Child ; Child, Preschool ; Female ; Glucocorticoids ; administration & dosage ; Hepatitis, Autoimmune ; blood ; diagnosis ; drug therapy ; Humans ; Liver Function Tests ; Male ; Pediatrics ; Prednisolone ; administration & dosage ; Retrospective Studies ; Singapore ; Tertiary Care Centers ; Treatment Outcome
8.Mismatched bone marrow transplantation for severe aplastic anaemia after liver transplantation for associated acute liver failure.
Vidyadhar P MALI ; Poh Lin TAN ; Marion AW ; Lincoln D S K LOH ; Seng Hock QUAK ; Krishnakumar MADHAVAN ; Prabhakaran KRISHNAN
Annals of the Academy of Medicine, Singapore 2011;40(9):420-421
9.An update of paediatric intussusception incidence in Singapore: 1997-2007, 11 years of intussusception surveillance.
Nancy TAN ; Yee-Leong TEOH ; Kong-Boo PHUA ; Seng-Hock QUAK ; Bee-Wah LEE ; Harvey James E L TEO ; Anette JACOBSEN ; Irving Charles BOUDVILLE ; Timothy NG ; Thomas VERSTRAETEN ; Hans Ludwig BOCK
Annals of the Academy of Medicine, Singapore 2009;38(8):690-692
INTRODUCTIONUnderstanding baseline epidemiology of intussusception (IS) in different geographical settings is important for the safety assessment of rotavirus vaccines. This paper presents IS surveillance data from Singapore between 1997 and 2007, including the period between November 2005 and December 2007 when rotavirus vaccines (primarily Rotarix) were available to newborns in Singapore.
MATERIALS AND METHODSCase ascertainment, collection, analyses and presentation of IS data was done as per recommendations of the Brighton Collaboration Working Group. For estimating the IS incidence rate in infants, live births for the years of the study were used as denominators, while for incidence in children age <2 years, the expected numbers of infant deaths occurring between 1 and 2 years of age was deducted from the combined live births for the 2 years, to obtain the denominator.
RESULTSThe incidence of IS among children aged <1 year throughout this 10-year period was higher than the incidence of IS in children between 1 and 2 years of age. In 2005, 2006 and 2007, the incidence of IS per 100,000 was 39.9, 26.4 and 35.6 in children aged <1 year and 26.2, 23.8 and 28.7 in children <2 years.
CONCLUSIONThis IS surveillance study provides reassuring preliminary evidence that there is no increase in the incidence of IS in Singapore after the introduction of rotavirus vaccines (including Rotarix) in Singapore.
Adolescent ; Child ; Child, Preschool ; Female ; Humans ; Incidence ; Infant ; Infant, Newborn ; Intussusception ; epidemiology ; prevention & control ; virology ; Male ; Population Surveillance ; Risk Assessment ; Rotavirus Vaccines ; Singapore ; epidemiology ; Time Factors
10.Immunogenicity, reactogenicity and safety of a diphtheria-tetanus-acellular pertussis-inactivated polio and Haemophilus influenzae type b vaccine in a placebo-controlled rotavirus vaccine study.
Kong Boo PHUA ; Seng Hock QUAK ; Fong Seng LIM ; Paul GOH ; Yee Leong TEOH ; Sanjoy Kumar DATTA ; Htay Htay HAN ; Hans Ludwig BOCK
Annals of the Academy of Medicine, Singapore 2008;37(7):546-553
INTRODUCTIONIn recent years, acellular pertussis combination vaccines have facilitated compliance with and coverage of the national immunisation programme in Singapore. This phase-II study (Rota-007) evaluated the immunogenicity, reactogenicity and safety of a DTPa-IPV/Hib combined vaccine when co-administered with a rotavirus vaccine.
MATERIALS AND METHODSA total of 2464 children aged 3 months were vaccinated with DTPa-IPV/Hib together with a randomised 1:3 ratio of either placebo (n=653) or 1 of 3 different formulations of a rotavirus vaccine. Blood samples were collected for immunogenicity analysis 1 month after the third DTPa-IPV/Hib vaccine dose in a subset of subjects (n = 640). Local and general reactogenicity and unsolicited adverse events were recorded during the follow-up after each vaccination.
RESULTSSerological analysis showed >95% response for all antigens in the co-administered DTPa-IPV/Hib vaccine, with no difference between the rotavirus vaccine and placebo groups. No differences in adverse events and reactogenicity were reported in the rotavirus vaccine and placebo groups. Only 0.2% of the subjects reported Grade 3 adverse events. Three subjects (from the vaccine groups) died during the study, which were assessed by the investigators as unrelated to vaccination. No deaths were reported in the placebo group.
CONCLUSIONThe combined DTPa- IPV/Hib vaccine is safe, well tolerated and highly immunogenic when given alone or coadministered with the rotavirus vaccine for infants in Singapore.
Child ; Child Welfare ; Child, Preschool ; Double-Blind Method ; Female ; Haemophilus Infections ; immunology ; prevention & control ; Haemophilus influenzae type b ; isolation & purification ; Humans ; Infant ; Infant, Newborn ; Male ; Patient Compliance ; Poliomyelitis ; prevention & control ; Rotavirus Vaccines ; Singapore ; Vaccines, Combined ; Vaccines, Conjugate ; adverse effects ; immunology

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