Displaying publications 1 - 20 of 24 in total

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  1. Van Rostenberghe HL, Kew ST, Hanifah MJ
    PMID: 16492958
    Matched MeSH terms: Respiratory Syncytial Virus Infections/epidemiology*
  2. Chan PW, Chew FT, Tan TN, Chua KB, Hooi PS
    Pediatr Pulmonol, 2002 Jul;34(1):47-51.
    PMID: 12112797 DOI: 10.1002/ppul.10095
    Respiratory syncytial virus (RSV) is the most important cause of lower respiratory tract infection (LRTI) in young children. We determined if there was a seasonal variation in Malaysia in the incidence of RSV infection in young children admitted with LRTI, and possible associations of RSV infection with local meteorological parameters. A total of 5,691 children, aged less than 24 months and hospitalized with LRTI (i.e., bronchiolitis and pneumonia) between 1982-1997, were included in this study. Nasopharyngeal samples were collected and examined for RSV by immunofluorescence, viral culture, or both. Seasonal variations were determined by analyzing the monthly RSV-positive isolation rate via time series analysis. Possible correlations with local meteorological parameters were also evaluated.RSV was isolated in 1,047 (18.4%) children. Seasonal variations in RSV infection rate were evident and peaked during the months of November, December, and January (test statistics [T] = 53.7, P < 0.001). This seasonal variation was evident for both bronchiolitis and pneumonia categories (T = 42.8 and 56.9, respectively, P < 0.001). The rate of RSV infection appeared to correlate with the monthly number of rain days (r = 0.26, P < 0.01), and inversely with the monthly mean temperature (r = -0.38, P < 0.001). In the tropics, seasonal variations in the incidence of RSV infection are evident, with an annual peak in November, December, and January. This information provides a guide for healthcare provisions and implementation of RSV prevention.
    Matched MeSH terms: Respiratory Syncytial Virus Infections/epidemiology*
  3. Rocha-Filho CR, Ramalho GS, Martins JWL, Lucchetta RC, Pinto ACPN, da Rocha AP, et al.
    J Pediatr (Rio J), 2023;99(6):537-545.
    PMID: 37247828 DOI: 10.1016/j.jped.2023.05.003
    OBJECTIVE: To identify and assess the current evidence available about the costs of managing hospitalized pediatric patients diagnosed with Respiratory Syncytial Virus (RSV) and Parainfluenza Virus Type 3 (PIV3) in upper-middle-income countries.

    METHODS: The authors conducted a systematic review across seven key databases from database inception to July 2022. Costs extracted were converted into 2022 International Dollars using the Purchasing Power Parity-adjusted. PROSPERO identifier: CRD42020225757.

    RESULTS: No eligible study for PIV3 was recovered. For RSV, cost analysis and COI studies were performed for populations in Colombia, China, Malaysia, and Mexico. Comparing the total economic impact, the lowest cost per patient at the pediatric ward was observed in Malaysia ($ 347.60), while the highest was in Colombia ($ 709.66). On the other hand, at pediatric ICU, the lowest cost was observed in China ($ 1068.26), while the highest was in Mexico ($ 3815.56). Although there is no consensus on the major cost driver, all included studies described that the medications (treatment) consumed over 30% of the total cost. A high rate of inappropriate prescription drugs was observed.

    CONCLUSION: The present study highlighted how RSV infection represents a substantial economic burden to health care systems and to society. The findings of the included studies suggest a possible association between baseline risk status and expenditures. Moreover, it was observed that an important amount of the cost is destinated to treatments that have no evidence or support in most clinical practice guidelines.

    Matched MeSH terms: Respiratory Syncytial Virus Infections*
  4. Teck KS, Mac Guad R, Van Rostenberghe AH, Hua GS
    J Med Virol, 2019 09;91(9):1608-1615.
    PMID: 31074499 DOI: 10.1002/jmv.25500
    Respiratory syncytial virus (RSV) is a common pathogen affecting the respiratory tract in infants. To date, there is limited data on RSV occurrence in Malaysia especially in the northeast of Peninsular Malaysia which is significantly affected by the rainy (monsoon) season. This study aimed to determine the prevalence, risk factors (the presence of a male sibling and older school-age siblings, parental education level, monthly income, chronic lung disease, immunocompromised, being a passive smoker, multipara, breastfeeding, prematurity, congenital heart disease, nursery attendance, and rainy season) as well as clinical manifestations of RSV in hospitalized infants and children with lower respiratory tract infection (LRTI). Patients' nasopharyngeal aspirates were tested for RSV antigen, questionnaires, and seasonal variations were used to assess RSV infection. Approximately 22.6% of children were infected with RSV; mean age 7.68 ± 5.45 months. The peak incidence of RSV as a causative agent for LRTI in infants was less than or equal to 1-year old (83%) with approximately 50.5% of the affected children in the younger age group (6 months amd below). RSV infection was significantly but independently associated with the rainy season (odds ratio, 3.307; 95% confidence interval, 1.443-3.688; P 
    Matched MeSH terms: Respiratory Syncytial Virus Infections/diagnosis; Respiratory Syncytial Virus Infections/epidemiology*; Respiratory Syncytial Virus Infections/virology*
  5. Ong SCL, Nur Azidawati AH, Liew YH, Anita S
    Med J Malaysia, 2017 10;72(5):311-313.
    PMID: 29197889 MyJurnal
    Acute necrotising encephalopathy of childhood (ANEC) is an uncommon disease with characteristic clinical and imaging findings. We present two cases of ANEC secondary to Respiratory Syncytial Virus (RSV) and mycoplasma infections. An eight-month-old boy presented with features of gastroenteritis but soon developed multiple episodes of seizures. Blood and CSF cultures were negative but nasopharyngeal aspirate immunofluorescence was positive for RSV. A nine-year-old girl presented with abnormal behaviour following two days of prodromal symptoms. Her serological markers implicated mycoplasma (IgM titre 1: 640). CT brain of both patients showed bilateral symmetrical thalamic hypodensities, while MRI revealed more extensive white matter involvements.
    Matched MeSH terms: Respiratory Syncytial Virus Infections/complications*; Respiratory Syncytial Virus Infections/drug therapy; Respiratory Syncytial Virus Infections/physiopathology
  6. Goh AYT, Chan PWK, Roziah M
    Singapore Med J, 1999 Feb;40(2):113-6.
    PMID: 10414173
    Acute respiratory distress syndrome (ARDS) associated with severe respiratory syncytial virus infection is rare. We report a 5-month-old Indian girl who was admitted to our intensive care ward with severe respiratory failure who fulfilled the criteria for ARDS using both Murray's Lung Injury Score of > 2.5 and the American-European Consensus Conference definition for ARDS. She developed diffuse bilateral alveolar infiltrates, severe hypoxaemia (PaO2/FiO2 < 100) and required high PEEP (> 15 cm H2O) 24 hours after admission. RSV was isolated from her nasopharyngeal secretion. She also had clinical features suggestive of a primary immunodeficiency and had laboratory evidence of combined T and B cell defect. There was unsustained clinical improvement with a dose of surfactant administered at 36 hours of PICU stay, and she continued to deteriorate and succumbed after 19 days in the PICU.
    Matched MeSH terms: Respiratory Syncytial Virus Infections/complications*; Respiratory Syncytial Virus Infections/diagnosis; Respiratory Syncytial Virus Infections/therapy*
  7. Khor CS, Sam IC, Hooi PS, Chan YF
    Infect Genet Evol, 2013 Mar;14:357-60.
    PMID: 23305888 DOI: 10.1016/j.meegid.2012.12.017
    From 1989 to 2011 in Kuala Lumpur, Malaysia, multiple genotypes from both respiratory syncytial virus (RSV) subgroups were found co-circulating each year. RSV-A subgroup predominated in 12 out of 17years with the remaining years predominated by RSV-B subgroup. Local RSV strains exhibited temporal clustering with RSV strains reported in previous epidemiological studies. Every few years, the existing predominant genotype was replaced by a new genotype. The RSV-A genotypes GA2, GA5 and GA7 were replaced by NA1 and NA2, while BA became the predominant RSV-B genotype. A unique local cluster, BA12, was seen in 2009, and the recently-described ON1 genotype with 72-nt duplication emerged in 2011. Our findings will have important implications for future vaccine intervention.
    Matched MeSH terms: Respiratory Syncytial Virus Infections/history; Respiratory Syncytial Virus Infections/epidemiology*
  8. Chan PW
    J Paediatr Child Health, 2002 Feb;38(1):104.
    PMID: 11869413
    Matched MeSH terms: Respiratory Syncytial Virus Infections/economics*; Respiratory Syncytial Virus Infections/therapy*
  9. Chan P, Goh A
    Singapore Med J, 1999 May;40(5):336-40.
    PMID: 10489491
    Respiratory syncytial virus (RSV) is the most important agent causing respiratory illness in the young paediatric age group.
    Matched MeSH terms: Respiratory Syncytial Virus Infections/complications; Respiratory Syncytial Virus Infections/pathology*
  10. Chan PW, Abdel-Latif ME
    Acta Paediatr, 2003 Apr;92(4):481-5.
    PMID: 12801117
    Respiratory syncytial virus (RSV) chest infection is a common cause of hospitalization in the very young child. The aim of this study was to determine the direct cost of resource utilization in the treatment of children hospitalized with RSV chest infection and the potential cost-savings with passive immunization for high-risk infants. An audit of the hospital resource consumption and its costs was performed for 216 children aged < 24 mo admitted with RSV chest infection between 1995 and 1997. The cost-saving potential of passive immunization using monoclonal RSV antibodies during the RSV season was determined by assuming an 0.55 efficacy in hospitalization reduction when administered to "high-risk" infants according to the guidelines outlined by the American Academy of Pediatrics (AAP). The hospital treatment cost of 1064 bed-days amounted to USD 64 277.70. Each child occupied a median of 4.0 bed-days at a median cost of USD 169.99 (IQ1 128.08, IQ3 248.47). Children, who were ex-premature or with an underlying illness were more likely to have a longer hospital stay, higher treatment costs and need for intensive care. Ten (42%) of 24 ex-premature infants fulfilled the recommended criteria for passive immunization. Its use resulted in an incremental cost of USD 31.39 to a potential cost saving of USD 0.91 per infant for each hospital day saved.

    CONCLUSION: Ex-prematurity and the presence of an underlying illness results in escalation of the direct treatment cost of RSV chest infection. Current guidelines for use of passive RSV immunization do not appear to be cost-effective if adopted for Malaysian infants.

    Matched MeSH terms: Respiratory Syncytial Virus Infections/economics*; Respiratory Syncytial Virus Infections/prevention & control; Respiratory Syncytial Virus Infections/therapy*
  11. Ng KF, Tan KK, Sam ZH, Ting GS, Gan WY
    J Paediatr Child Health, 2017 Apr;53(4):399-407.
    PMID: 27704652 DOI: 10.1111/jpc.13375
    AIM: The aim of this study is to describe epidemiology, clinical features, laboratory data and severity of respiratory syncytial virus (RSV) acute lower respiratory infection (ALRI) in Malaysian children and to determine risk factors associated with prolonged hospital stay, paediatric intensive care unit (PICU) admission and mortality.

    METHODS: Retrospective data on demographics, clinical presentation, outcomes and laboratory findings of 450 children admitted into Tuanku Jaafar Hospital in Seremban, Malaysia from 2008 to 2013 with documented diagnosis of RSV ALRI were collected and analysed.

    RESULTS: Most admissions were children below 2 years old (85.8%; 386/450). Commonest symptoms were fever (84.2%; 379/450), cough (97.8%; 440/450) and rhinorrhea (83.6%; 376/450). The median age among febrile patients (n = 379) was 9.0 months with interquartile range (IQR) of 4.0-19.0 months whereas the median age among those who were apyrexial (n = 71) was 2 months with IQR of 1-6 months (P-value <0.001). 15.3% (69/450) needed intensive care and 1.6% (7/450) died. Young age, history of prematurity, chronic comorbidity and thrombocytosis were significantly associated with prolonged hospital stay, PICU admission and mortality.

    CONCLUSIONS: Infants less than 6 months old with RSV ALRI tend to be afebrile at presentation. Younger age, history of prematurity, chronic comorbidity and thrombocytosis are predictors of severe RSV ALRI among Malaysian children. Case fatality rate for Malaysian children below 5 years of age with RSV ALRI in our centre is higher than what is seen in developed countries, suggesting that there is room for improvement.

    Matched MeSH terms: Respiratory Syncytial Virus Infections/diagnosis; Respiratory Syncytial Virus Infections/epidemiology*; Respiratory Syncytial Virus Infections/physiopathology*
  12. Paynter S, Ware RS, Weinstein P, Williams G, Sly PD
    Lancet, 2010 Nov 27;376(9755):1804-5.
    PMID: 21111894 DOI: 10.1016/S0140-6736(10)62141-1
    Matched MeSH terms: Respiratory Syncytial Virus Infections/epidemiology
  13. Shobugawa Y, Takeuchi T, Hibino A, Hassan MR, Yagami R, Kondo H, et al.
    Epidemiol Infect, 2017 Jan;145(2):272-284.
    PMID: 27682641
    In temperate zones, human respiratory syncytial virus (HRSV) outbreaks typically occur in cold weather, i.e. in late autumn and winter. However, recent outbreaks in Japan have tended to start during summer and autumn. This study examined associations of meteorological conditions with the numbers of HRSV cases reported in summer in Japan. Using data from the HRSV national surveillance system and national meteorological data for summer during the period 2007-2014, we utilized negative binomial logistic regression analysis to identify associations between meteorological conditions and reported cases of HRSV. HRSV cases increased when summer temperatures rose and when relative humidity increased. Consideration of the interaction term temperature × relative humidity enabled us to show synergistic effects of high temperature with HRSV occurrence. In particular, HRSV cases synergistically increased when relative humidity increased while the temperature was ⩾28·2 °C. Seasonal-trend decomposition analysis using the HRSV national surveillance data divided by 11 climate divisions showed that summer HRSV cases occurred in South Japan (Okinawa Island), Kyushu, and Nankai climate divisions, which are located in southwest Japan. Higher temperature and higher relative humidity were necessary conditions for HRSV occurrence in summer in Japan. Paediatricians in temperate zones should be mindful of possible HRSV cases in summer, when suitable conditions are present.
    Matched MeSH terms: Respiratory Syncytial Virus Infections/epidemiology*
  14. Khor CS, Sam IC, Hooi PS, Quek KF, Chan YF
    BMC Pediatr, 2012;12:32.
    PMID: 22429933 DOI: 10.1186/1471-2431-12-32
    Viral respiratory tract infections (RTI) are relatively understudied in Southeast Asian tropical countries. In temperate countries, seasonal activity of respiratory viruses has been reported, particularly in association with temperature, while inconsistent correlation of respiratory viral activity with humidity and rain is found in tropical countries. A retrospective study was performed from 1982-2008 to investigate the viral etiology of children (≤ 5 years old) admitted with RTI in a tertiary hospital in Kuala Lumpur, Malaysia.
    Matched MeSH terms: Respiratory Syncytial Virus Infections/epidemiology*; Respiratory Syncytial Virus Infections/virology
  15. Kua KP, Lee SWH
    Pharmacotherapy, 2017 Jun;37(6):755-769.
    PMID: 28423192 DOI: 10.1002/phar.1936
    BACKGROUND: Respiratory syncytial virus (RSV) is a common pathogen in infants with cystic fibrosis (CF). The use of palivizumab prophylaxis for RSV infection as the standard of care for infants with CF remains controversial.

    OBJECTIVE: To evaluate the efficacy of palivizumab in reducing the incidence of RSV hospitalization in children with CF who are younger than 2 years.

    METHODS: Four electronic databases (PubMed, Embase, CINAHL, and CENTRAL) were searched from inception until January 31, 2017, for clinical studies investigating the use of palivizumab in infants with CF aged less than 2 years. The primary outcome was hospitalization rate due to RSV infection. Secondary outcomes included hospitalization for respiratory illness, length of hospital stay, safety (adverse effects), and cost-effectiveness of palivizumab prophylaxis.

    RESULTS: The review included a total of 10 studies (six cohort studies, two before-and-after studies, one cross-sectional study, and one randomized controlled trial) involving 3891 patients with CF. Seven studies reported that palivizumab prophylaxis had a positive impact on the rate of RSV hospitalization. Five studies (n=3404) reported that palivizumab prophylaxis significantly reduced the rate of hospitalization due to RSV infection compared to no prophylaxis. One study (n=5) demonstrated patients with CF who received palivizumab had no RSV hospitalization. Another study showed infants with CF receiving palivizumab (n=117) had a lower risk of hospitalization for RSV infection compared with premature infants (gestational age < 35 completed weeks) who received palivizumab (n=4880).

    CONCLUSIONS: Evidence from the literature suggests that palivizumab may have a potential role in reducing RSV hospitalization in children aged less than 2 years with CF. Given the lack of overall data, additional research is warranted to better understand the efficacy and safety of prophylactic palivizumab in infants with CF.

    Matched MeSH terms: Respiratory Syncytial Virus Infections/drug therapy*; Respiratory Syncytial Virus Infections/epidemiology
  16. Fieldhouse JK, Toh TH, Lim WH, Ting J, Ha SJ, Hii KC, et al.
    PLoS One, 2018;13(8):e0202147.
    PMID: 30110367 DOI: 10.1371/journal.pone.0202147
    BACKGROUND: Respiratory syncytial virus (RSV) and parainfluenza virus (PIV) are frequent causes of pneumonia and death among children at Sibu and Kapit Hospitals in Sarawak, Malaysia.

    OBJECTIVES: To determine the prevalence and risk factors for RSV subtypes A and B and PIV types 1-4 among patients hospitalized with pneumonia.

    METHODS: In a cross-sectional, pilot study nasopharyngeal swabs were studied with real-time reverse transcription polymerase chain reaction assays. Concurrently, we helped Sibu and Kapit Hospitals adapt their first molecular diagnostics for RSV and PIV.

    RESULTS: Of 129 specimens collected (June to July 2017), 39 tested positive for RSV-A (30.2%), two were positive for RSV B (1.6%), one was positive for PIV-3 (0.8%) and one was positive for PIV-4 (0.8%). No samples were positive for PIV-1 or PIV-2. Of the 39 RSV-A positive specimens, 46.2% were collected from children under one year of age and only 5.1% were from patients over the age of 18. A multivariable analysis found the odds of children <1 year of age testing positive for RSV-A were 32.7 (95% CI: 3.9, 276.2) times larger than >18 years of age, and the odds of patients hospitalized at Kapit Hospital testing positive for RSV-A were 3.2 (95% CI: 1.3, 7.8) times larger than patients hospitalized at Sibu Hospital.

    CONCLUSION: This study found an unusually high prevalence of RSV-A among pneumonia patients admitted to the two hospitals. Subsequently, Sibu Hospital adapted the molecular assays with the goal of providing more directed care for such pneumonia patients.

    Matched MeSH terms: Respiratory Syncytial Virus Infections/epidemiology*; Respiratory Syncytial Virus Infections/virology
  17. Chan Y, Ng SW, Singh SK, Gulati M, Gupta G, Chaudhary SK, et al.
    Life Sci, 2021 Sep 01;280:119744.
    PMID: 34174324 DOI: 10.1016/j.lfs.2021.119744
    Viral respiratory tract infections have significantly impacted global health as well as socio-economic growth. Respiratory viruses such as the influenza virus, respiratory syncytial virus (RSV), and the recent SARS-CoV-2 infection (COVID-19) typically infect the upper respiratory tract by entry through the respiratory mucosa before reaching the lower respiratory tract, resulting in respiratory disease. Generally, vaccination is the primary method in preventing virus pathogenicity and it has been shown to remarkably reduce the burden of various infectious diseases. Nevertheless, the efficacy of conventional vaccines may be hindered by certain limitations, prompting the need to develop novel vaccine delivery vehicles to immunize against various strains of respiratory viruses and to mitigate the risk of a pandemic. In this review, we provide an insight into how polymer-based nanoparticles can be integrated with the development of vaccines to effectively enhance immune responses for combating viral respiratory tract infections.
    Matched MeSH terms: Respiratory Syncytial Virus Infections/prevention & control; Respiratory Syncytial Virus Infections/virology
  18. Hafidh RR, Abdulamir AS, Abu Bakar F, Sekawi Z, Jahansheri F, Jalilian FA
    PMID: 26062546 DOI: 10.1186/s12906-015-0688-2
    New sources for discovering novel antiviral agents are desperately needed. The current antiviral products are both expensive and not very effective.
    Matched MeSH terms: Respiratory Syncytial Virus Infections/drug therapy*; Respiratory Syncytial Virus Infections/metabolism; Respiratory Syncytial Virus Infections/virology
  19. Chan, P.W.K.
    MyJurnal
    Respiratory syncytial virus (RSV) is isolated in 15-25% of young Malaysian children with bronchiolitis.',2 Although this observation is consistent with experience reported in other developing nations in the tropics,3•4 it is lower than that of temperate developed nations where RSV is isolated in 60 - 80% of young children with viral bronchiolitis.5,6 The majority of infections are mild, easily cared for at home and only 1% of children with RSV bronchiolitis require in-hospital care.' However, several categories of children have been identified to develop severe RSV bronchiolitis that is asso-ciated with an increased risk of mortality and significant morbidity. This 'high-risk' group includes children who are very young, ex-premature (gestation less than 36 weeks), children with chronic lung disease, congenital heart disease and immunodeficiency, namely, haematological transplant recipients.8'9 It is for this category of children in whom effective therapeutic strategies for the treatment of RSV bronchiolitis are most important.
    Matched MeSH terms: Respiratory Syncytial Virus Infections
  20. Chan PW, Lok FY, Khatijah SB
    PMID: 12757230
    Respiratory syncytial virus (RSV) bronchiolitis is a common infection in young children and may result in hospitalization. We examined the incidence of, and risk factors associated with, hypoxemia and respiratory failure in 216 children aged < 24 months admitted consecutively for proven RSV bronchiolitis. Hypoxemia was defined as SpO2 < 90% in room air and severe RSV bronchiolitis requiring intubation and ventilation was categorized as respiratory failure. Corrected age at admission was used for premature children (gestation < 37 weeks). Hypoxemia was suffered by 31 (14.3%) children. It was more likely to occur in children who were Malay (OR 2.56, 95%CI 1.05-6.23, p=0.03) or premature (OR 6.72, 95%CI 2.69-16.78, p<0.01). Hypoxemia was also more likely to develop in children with failure to thrive (OR 2.96, 95%CI 1.28-6.82, p<0.01). The seven (3.2%) children who were both premature (OR 11.94, 95%CI 2.50-56.99, p<0.01) and failure to thrive (OR 6.41, 95%CI 1.37-29.87, p=0.02) were more likely to develop respiratory failure. Prematurity was the only significant risk factor for hypoxemia and respiratory failure by logistic regression analysis (OR 1.17, 95%CI 1.06-1.55, p<0.01 and OR 1.14 95%CI 1.02-2.07, p=0.02 respectively). Prematurity was the single most important risk factor for both hypoxemia and respiratory failure in RSV bronchiolitis.
    Matched MeSH terms: Respiratory Syncytial Virus Infections/complications*; Respiratory Syncytial Virus Infections/therapy
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