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PubMed2004

Subacute sclerosing panencephalitis in children: prevalence in South China.

This investigation reports the prevalence and clinical profile of subacute sclerosing panencephalitis in two developed cities of southern China. A territory-wide survey was conducted to identify all subacute sclerosing panencephalitis cases diagnosed during 1988-2002 in Hong Kong and Macau. Altogether, 10 cases (male:female = 7:3) were identified of whom six were still alive. The prevalence rate of subacute sclerosing panencephalitis in Hong Kong and Macau in 2002 was 1 per million total population or 5.5 per million children. The mean age of presentation was 9.4 years (range = 4-14 years). Presenting features included myoclonus (60%), deterioration in school performance (30%), and transient visual impairment (10%). The clinical course was highly variable. Most had subacute course, but two deteriorated rapidly and died within 6 months. Seven children had measles infection, and the majority of infection (86%) occurred during the world measles epidemic in 1988. The mean interval between measles infection and onset of subacute sclerosing panencephalitis was 6.5 years (range = 3-11 years). There has been an increasing trend of subacute sclerosing panencephalitis in southern China after the measles outbreak in 1988. Active surveillance of subacute sclerosing panencephalitis for those with measles infection during the 1988 outbreak is necessary to conduct multicenter drug trials for this devastating disease.

Adolescent↗
PubMed1999

Bronchial asthma in children: clinical and epidemiologic approach in different Portuguese speaking countries.

BACKGROUND: Geographical differences in asthma prevalence are currently accepted, but evidence is sparse due to the lack of multicentre studies using the same protocol. OBJECTIVES: To compare the prevalence of asthma and atopy among schoolchildren from Portuguese speaking countries (ISAAC and Portuguese Study) and evaluate some environmental variables, such as house dust mite exposure. MATERIAL AND METHODS: Significant random samples of schoolchildren studied with standard validated methods--questionnaires, skin prick tests, methacholine bronchial challenge tests; dust bed sampling for analysis of mite antigens. RESULTS: In the ISAAC study, in the 13-14 year-old age group, statistical significant differences were found, with higher wheezing prevalence in Brazil than in Portugal (two-fold). In the Portuguese Study, atopy prevalence ranged between 6.0 and 11.9% in Sal and S. Vicente (Cape Verde), up to 48.6 and 54.1% in Macau and Madeira. Active asthma had the higher values in Madeira (14.6%), and the lower in Macau (1.3%). Cape Verde had intermediate asthma prevalence (10.6 and 7.0%). The bronchial challenge test was positive in 25, 66 and 70% of asthmatic children from Sal, S. Vicente and Madeira respectively. Significant HDM antigen concentrations (Der p1) were found in Cape Verde and Madeira. CONCLUSIONS: There are significant variations in asthma and atopy prevalence between these pediatric populations. The reasons remain under discussion, but genetics linked to race, seem to play a central role, modulated by environmental and lifestyle variables.

Adolescent↗
PubMed1997

A home electrocardiography and blood pressure telemonitoring system.

A home electrocardiography (ECG) and blood pressure telemonitoring system for cardiac patients was installed in the Macau region. The monitoring centre was established in the emergency unit at the Government Hospital of Macau. The first users were 10 cardiovascular patients selected by a physician. The average age of these users was 61 years (range 30-78). The results of a three-month trial showed that the system was easy to operate and technically reliable. It was found to be helpful for cardiac patients. The most significant problem during the trial was electrical noise from the ECG electrodes.

Adult↗
PubMed2001

Field monitoring of toxic organic pollution in the sediments of Pearl River estuary and its tributaries.

Field monitoring of the toxic organic compounds (PCBs, PAHs, organochlorine pesticides) in the top sediments of Pearl River Estuary and its up-streams were made. It was found that the highest concentrations of these toxic organic compounds occurred in the sediment sampled at Macau inner harbor (ZB013), which is a sink of suspended fine particles transported from the upstream waterways. Because of the affinity of the hydrophobic organic compounds (PAHs, PCBs) for the solid phase, these fine particle depositions led to accumulation of these compounds in the sediment of Macau. The atmospheric dry deposition may be another source of the toxic organic pollution in the sediment.

Air Movements↗
PubMed1996

Expanded programme on immunization (EPI) immunization schedules in the WHO Western Pacific Region, 1995.

There are 36 countries/areas in this Region; Mongolia was transferred to the Western Pacific Region in 1995. No data are available from the Cook Islands, Nauru, and New Caledonia (Tables 1-3). BCG is used in all but 6 countries/areas (American Samoa, Australia, Guam, New Zealand, Northern Mariana Islands and Palau). Most countries/areas give BCG at birth; Japan gives it at 3 months, the Republic of Korea at 4 weeks, and Samoa at 5 years of age. Nine countries give 2 doses of BCG and 4 give 3 doses, up to 15 years of age. Mongolia gives 4 doses up to 18 years of age. Diphtheria-pertussis-tetanus (DPT) vaccine is used as a primary series of 3 doses in all countries/areas; 17 countries give 1 to 3 booster doses of DPT vaccine in the first year of life or later. Diphtheria-tetanus (DT) booster doses are given in Brunei Darussalam, Mongolia and New Zealand. Td is also given in New Zealand. Oral poliovirus vaccine (OPV) is used in a primary series of 3 doses simultaneously with DPT vaccine in all countries/areas. Eight countries/areas use an additional dose of OPV at birth (Cambodia, Fiji, Hong Kong, Kiribati, Lao People's Democratic Republic, Marshall Islands, Papua New Guinea and Tuvalu). A booster dose of OPV in the second year of life is used in 9 countries/areas and a booster dose of OPV is given to schoolchildren in 16 countries/areas. Measles vaccine is given in all countries/areas from 8-15 months of age usually in the form of monovalent measles vaccine, except in Macau. In 4 countries/areas, it is given in the form of measles-mumps-rubella (MMR) vaccine (Guam, Hong Kong, Palau and Singapore). The 2-dose policy is implemented in 4 countries/areas (American Samoa, New Zealand, Palau, and Samoa). In Australia and Palau, the second dose is given as MMR vaccine. The age at the second dose varies from 4 to 13 years of age. Rubella vaccine is given in 4 countries/areas to girls between 10 and 14 years of age (Fiji, French Polynesia, Japan and Macau). In Hong Kong, it is not specified if only girls receive rubella vaccine. In Australia and New Zealand, rubella vaccine is given to seronegative women immediately after delivery. Hepatitis B is used in all but 7 countries/areas (Cambodia, China, Guam, Kiribati, Lao People's Democratic Republic, Tokelau and Viet Nam). All countries which give hepatitis B vaccine use 3 primary doses in infancy, the first dose being given at birth in 23 countries/areas. In Australia and Japan, this vaccine is given to groups at risk. Tetanus toxoid (TT) is used for pregnant or nonpregnant women of childbearing age. It is used in 14 countries/areas, but in Australia and Palau the target group is schoolchildren. The schedules include 2-5 doses of TT.

Adolescent↗
PubMed2006

Barcode technology in blood bank information systems: upgrade and its impact.

This paper desires to explore the role of barcode technology in blood bank information systems via addressing its upgrade and the consequent impact. Firstly, it briefs the application and effect of barcode technology in blood donation and transfusion service. In the second, the barcode paradigms of Macau Codabar and ISBT 128 are carefully examined and compared in accordance with the procedure and specifications of barcode upgrade. Then, the impact due to upgrade is assessed from the perspectives of blood bank information system, blood banks, and even blood donation and transfusion service. It finally discusses the considerations on implementing the upgrade of barcode technology in blood bank information systems.

Blood Banks↗
PubMed2000

The impact of heavy passive smoking on arterial endothelial function in modernized Chinese.

OBJECTIVES: The study evaluated whether heavy exposure to environmental tobacco smoke (passive smoking) might damage arterial function in modernized Chinese. BACKGROUND: Heavy passive smoking is associated with arterial endothelial dysfunction in Caucasian, but not rural Chinese, subjects. METHODS: We studied 20 young (mean age 36.6 +/- 7.0 years) nonsmoking asymptomatic casino workers (9 men) in Macau who were exposed to environmental tobacco smoke for over 8 h/day for at least two years and 20 normal subjects (control subjects). These two groups were carefully matched for age, gender, body mass index (BMI), blood pressure, vessel diameter, cholesterol and glucose levels. Brachial artery diameter was measured by high-resolution B-mode ultrasound at rest, after flow increase (causing flow-mediated endothelium-dependent dilation) and after sublingual nitroglycerin (an endothelium-independent dilator). RESULTS: Flow-mediated dilation (mean +/- SD% of diameter changes) was significantly lower in passive smokers (6.6 +/- 3.4%) compared with the controls (10.6 +/- 2.3%) (p < 0.0001). Nitroglycerin-induced dilation of the two groups were similar. Upon multivariate analysis, passive smoking exposure was the strongest independent predictor (beta = -0.59; p = 0.0001) for impaired flow-mediated endothelium-dependent dilation (model R2 = 0.75, F value = 6.1, p = 0.0001). CONCLUSIONS: In modernized Chinese, as in Caucasians, exposure to heavy environmental tobacco smoke causes arterial endothelial dysfunction, a key early event in atherosclerosis. This may have serious implications for cardiovascular health in China, currently in a process of rapid modernization.

Administration, Sublingual↗
PubMed2004

Deleterious impact of "high normal" glucose levels and other metabolic syndrome components on arterial endothelial function and intima-media thickness in apparently healthy Chinese subjects: the CATHAY study.

OBJECTIVE: Endothelial vasodilator dysfunction and carotid intima-media thickening are useful surrogate markers of cardiovascular disease, a major cause of morbidity and mortality in type 2 diabetic patients. However, because most studies reporting the relationships between endothelial function, intima-media thickness (IMT), and hyperglycemia have compared diabetic patients with healthy controls, we report their relationship with glycemia as a continuum. METHODS AND RESULTS: Brachial artery endothelial function (flow-mediated dilatation [FMD]) and carotid IMT were measured noninvasively by high-resolution ultrasound B-mode imaging in 228 apparently healthy Chinese subjects recruited from Hong Kong and Macau. FMD and IMT were significantly associated with increasing levels of glycemia, particularly in the "high normal" glycemic range, with IMT increasing and endothelium-independent dilatation decreasing linearly across the glucose tertiles, and endothelium-dependent dilatation significantly lower in the upper glucose tertile compared with the other 2 groups (P<0.01). Using multiple linear regression, fasting glucose level was identified as an independent predictor of each of these markers of vascular function (P<0.004). Additionally, other conventional cardiovascular risk factors, including obesity, blood pressure, and an adverse lipid profile, were also related to levels of glycemia (P<0.05), further contributing to impaired vascular function. CONCLUSIONS: Increasing levels of glycemia and the coexistence of other cardiovascular risk factors in apparently healthy subjects are adversely associated with arterial endothelial dysfunction and intima-media thickening.

Adolescent↗
PubMedDate not supplied

[Apropos of 2 anniversaries].

The Paediatric Cardiology Service in Santa Marta Hospital accomplished 25 years of existence at the end of 1994. The Conde de S. Januário Hospital, in Macau also celebrated its 120th anniversary at the same time. The Paediatric Cardiology a paper entitled collaborated in these festivities with Service of Santa Marta Hospital Paediatric Cardiology, 25 years. Hospital de Santa Marta-Lisbon-Past, Present, Future. This paper is now published.

Anniversaries and Special Events↗
PubMed2002

A founder mutation (R254X) of SLC22A5 (OCTN2) in Chinese primary carnitine deficiency patients.

Mutations in the SLC22A5 gene, which encodes for the plasma membrane carnitine transporter OCTN2, cause primary carnitine deficiency (PCD). After our first report of OCTN2 mutations in Chinese, three more Chinese PCD patients were identified. The parents of these families were non-consanguineous and these families were unrelated. Two novel truncating mutations were found: R254X, a single-base mutation at cDNA position 981 (c.981C>T); and Y387X (c.1382T>G). Two probands, one each from Taiwan and Macau, were homozygous for R254X. The other proband from Taiwan carried both R254X and Y387X. Two additional heterozygote carriers of R254X were also identified among 250 control samples, while none was detected for Y387X. The population carrier rate for R254X would be about 1 in 125. Haplotypes of R254X alleles were examined and patients homozygous for R254X were also homozygous for the same haplotype of intragenic and microsatellites markers. Analysis of population frequencies of haplotypes revealed that the chance of 4 chromosomes having arisen as independent events was 0.016. We conclude that R254X is probably a founder mutation in Chinese. Other previously reported mutations found in the Japanese population were also screening in 250 control samples but no carrier was identified, indicating that they were either very rare or not present in Southern Chinese.

Carnitine↗
PubMed1997

Complete coding sequence of hepatitis C virus genotype 6a.

Hepatitis C virus (HCV) genotype 6a is found in a restricted part of South East Asia, including Hong Kong, Macau and Vietnam. We determined the full length coding sequence of a type 6a isolate (EUHK2) obtained from a Hong Kong blood donor. The sequence of EUHK2 contained a single open reading frame coding for a polyprotein of 3018 amino acids, within the range of 3008 to 3037 for other HCV genotypes. The full length sequence of EUHK2 showed 30.3%-32.9% nucleotide (24.3%-29.4% amino acid) sequence divergence from genotypes 1-4, but only 27.7% (20.7% amino acid) divergence from JK046 ("type 11a"). These similarity values were intermediate between those of other HCV genotypes (minimum 28.4%) and between subtypes (maximum 25%). The close evolutionary relationship of EUHK2 with JK046 was further indicated by their grouping together by phylogenetic analysis.

Cloning, Molecular↗