Browse publications by year: 1999

  1. Hoe VB, Siong KH
    Asia Pac J Clin Nutr, 1999 Mar;8(1):24-31.
    PMID: 24393732
    The proximate composition including mineral and vitamin contents of 16 fruits and 46 vegetables (leaves, fruits, palm hearts and shoots) of indigenous origin in Sarawak are provided. Fruits like dabai (Canarium odontophyllum), kembayau (Dacryodes rostrata f. cuspidata), durian nyekak (Durio kutejensis) and durian kuning (Durio graveolens) are very nutritious with high values for energy, protein and potassium. Among the vegetables, the protein content of letup (Passiflora foetida), kepayang (Pangium edule) and tubu (Pycnarrhena tumetacta) is high, ranging from 6 to 7%. The range of nutrients among foods of indigenous origin are generally comparable with those of many cultivated species except for vitamin C, which is lower. Teh Kampung (Leucosyke capitellata) leaves are particularly high in magnesium (626 mg/100 g). Some of the indigenous vegetables contain antinutritional factors. Kepayang has very high levels of hydrogen cyanide (1834 µg/g on dry basis) but this poison can be completely evaporated by boiling. Indigenous fruits and vegetables which are pesticide residue free are important food sources for rural populations. Nutritious indigenous fruits and vegetables have the potential to be promoted for wider use, domestication and commercialization.
  2. Thiruventhiran T, Goh BL, Leong CL, Cheah PL, Looi LM, Tan SY
    Nephrol. Dial. Transplant., 1999 Jan;14(1):214-7.
    PMID: 10052513
    MeSH terms: Adult; Animals; Child; Female; Humans; Insect Bites and Stings/complications*; Kidney Tubular Necrosis, Acute/etiology; Kidney Tubular Necrosis, Acute/pathology; Kidney Tubules/pathology; Liver Diseases/diagnosis; Liver Diseases/etiology; Liver Function Tests; Male; Myoglobin/analysis; Wasps*; Acute Kidney Injury/etiology*; Acute Kidney Injury/pathology
  3. Yuen KH, Peh KK, Billa N
    Drug Dev Ind Pharm, 1999 Mar;25(3):353-6.
    PMID: 10071829
    The bioavailability of a generic preparation of naltrexone (Narpan) was compared with the innovator product, Trexan. Twelve healthy volunteers participated in the study, conducted according to a completely randomized, two-way crossover design. The preparations were compared using the parameters area under the plasma concentration-time curve AUC0-infinity, peak plasma concentration Cmax, and time to reach peak plasma concentration Tmax. No statistically significant difference was observed between the logarithmic transformed AUC0-infinity and the logarithmically transformed Cmax values of the two preparations. Also, no statistically significant difference was observed between the untransformed Tmax values. In addition, the 90% confidence interval for the ratio of the logarithmic transformed AUC0-infinity values of Narpan over those of Trexan was found to lie between 0.87 and 1.01, while that of the logarithmic transformed Cmax values was between 0.94 and 1.23, both being within the bioequivalence limit of 0.80-1.25. The numerical values of the elimination half-life (t1/2) obtained with the two preparations were also not significantly different and were comparable to those reported in the literature.
    MeSH terms: Adult; Biological Availability; Humans; Male; Naltrexone/administration & dosage*; Naltrexone/blood; Naltrexone/pharmacokinetics*; Narcotic Antagonists/administration & dosage*; Narcotic Antagonists/blood; Narcotic Antagonists/pharmacokinetics*; Drugs, Generic*; Cross-Over Studies; Area Under Curve
  4. Peh KK, Yuen KH, Wong JW, Toh WT
    Drug Dev Ind Pharm, 1999 Mar;25(3):357-60.
    PMID: 10071830
    A study was conducted to compare the bioavailability of a generic product of atenolol (Normaten FC) with the innovator product, Tenormin. Twelve healthy adult volunteers participated in the study conducted according to a randomized, two-way crossover design. The preparations were compared using area under the plasma concentration-time curve AUC0-infinity, peak plasma concentration Cmax, and time to reach peak plasma concentration Tmax. No statistically significant difference was obtained between the Tmax values and the logarithmic transformed AUC0-infinity and Cmax values of the two products. Moreover, the 90% confidence interval for the ratio of the logarithmically transformed AUC0-infinity values of Normaten FC over those of Tenormin was found to lie between 0.82 and 0.98, while that of the logarithmically transformed Cmax values was between 0.82 and 1.09, both being within the bioequivalence limit of 0.80-1.25. The values of elimination half-life t1/2 between the two products were also found comparable and not significantly different statistically. The t1/2 values obtained in our study were slightly longer than those reported in the literature for other population groups.
    MeSH terms: Adrenergic beta-Antagonists/administration & dosage*; Adrenergic beta-Antagonists/blood; Adrenergic beta-Antagonists/pharmacokinetics*; Adult; Atenolol/administration & dosage*; Atenolol/blood; Atenolol/pharmacokinetics*; Biological Availability; Humans; Male; Tablets; Cross-Over Studies; Area Under Curve
  5. Yakub MA, Pau KK, Awang Y
    Ann Thorac Cardiovasc Surg, 1999 Feb;5(1):36-9.
    PMID: 10074567
    A minimally invasive approach to aortic valve surgery through a transverse incision ("pocket incision") at the right second intercostal space was examined. Sixteen patients with a mean age of 30 years underwent this approach. The third costal cartilage was either excised (n = 5) or dislocated (n = 11). The right internal mammary artery was preserved. Cardiopulmonary bypass (CPB) was established with aortic-right atrial cannulation in all except the first case. Aortic valve replacements (AVR) were performed in 15 patients and one had aortic valve repair with concomitant ventricular septal defect closure. There was no mortality and no major complications. The aortic cross-clamp, CPB and operative times were 72 +/- 19 mins, 105 +/- 26 mins and 3 hrs 00 min +/- 29 mins respectively. The mean time to extubation was 5.7 +/- 4.0 hrs, ICU stay of 27 +/- 9 hrs and postoperative hospital stay of 5.1 +/- 1.2 days. Minimally invasive "pocket incision" aortic valve surgery is technically feasible and safe. It has the advantages of central cannulation for CPB, preservation of the internal mammary artery and avoiding sternotomy. This approach is cosmetically acceptable and allows rapid patient recovery.
    MeSH terms: Adolescent; Adult; Aged; Aortic Valve Insufficiency/etiology; Aortic Valve Insufficiency/surgery*; Cardiopulmonary Bypass; Female; Humans; Male; Middle Aged; Retrospective Studies; Case-Control Studies; Treatment Outcome; Statistics, Nonparametric; Minimally Invasive Surgical Procedures/methods*
  6. Jamal F, Pit S, Facklam R, Beall B
    Emerging Infect. Dis., 1999 Jan-Feb;5(1):182-3.
    PMID: 10081694
    MeSH terms: Antigens, Bacterial*; Bacterial Outer Membrane Proteins*; Bacterial Proteins/genetics*; Carrier Proteins/genetics*; Humans; Malaysia; Molecular Sequence Data; Streptococcal Infections/microbiology*; Streptococcus pyogenes/classification; Streptococcus pyogenes/genetics*; Streptococcus pyogenes/isolation & purification; Bacterial Typing Techniques; Sequence Analysis, DNA
  7. Chung KM
    Optom Vis Sci, 1999 Feb;76(2):121-6.
    PMID: 10082059
    The clinical significance of fundus magnification produced during direct ophthalmoscopy of the corrected eye has not been fully established. Based on paraxial ray tracing, fundus magnification (M) can be defined by a simple equation, M = (K'/4) x (Fs/K), where K' is the dioptric axial power of the eye, Fs is the correcting thin lens power and K is the ocular ametropia. Refractive myopes produce greater fundus magnification than axial myopes, whereas refractive hyperopes produce lower fundus magnification than axial hyperopes. If we assume 15 x fundus magnification as our standard magnification for an emmetropic reduced eye, then wearing glasses or putting the focusing lens at or close to the anterior focus of the eye is able to achieve the standard magnification for axial myope and axial hyperope, whereas wearing contact lenses is able to achieve the standard magnification for refractive myope and refractive hyperope. Vertex distance has greater influence on fundus magnification produced during direct ophthalmoscopy than other funduscopic techniques. In conclusion, the newly defined formula has clinical applications during direct ophthalmoscopy.
    MeSH terms: Eyeglasses; Fundus Oculi*; Humans; Ophthalmoscopy*; Refraction, Ocular; Refractive Errors/pathology*; Refractive Errors/therapy*; Retina/pathology*
  8. Suleiman AB, Mathews A, Jegasothy R, Ali R, Kandiah N
    Bull. World Health Organ., 1999;77(2):190-3.
    PMID: 10083722
    A confidential system of enquiry into maternal mortality was introduced in Malaysia in 1991. The methods used and the findings obtained up to 1994 are reported below and an outline is given of the resulting recommendations and actions.
    PIP: This is a report on the methods, findings, resulting recommendations and actions of a study on maternal mortality in Malaysia during the period 1991-94. Maternal death was defined as the death of a woman while pregnant or within 42 days following termination of pregnancy from any cause related to the pregnancy or its management but not from accidental causes. Between 1991 and 1994 there were 1066 reported maternal deaths, and the maternal mortality ratios for the successive years were respectively 44, 48, 46 and 39 per 100,000 live births. The primary causes of maternal death were postpartum hemorrhage (24%), hypertensive disorders of pregnancy (16%), obstetric pulmonary embolism (13%), and associated medical conditions (7%). Analysis of the 375 deaths from 1992 - 1993 showed that the maternal mortality ratio was 53/100,000 live births for deliveries performed at home, 36/100,000 in government hospitals, and 21/100,000 in private institutions. Shortcomings among health personnel were detected in several cases; these involved failure to diagnose, failure to appreciate the severity of a patient's condition, inadequate therapy, and inappropriate, delayed or failed adherence to protocols. The high proportion of maternal mortality associated with substandard care demonstrates that it is important to make the standard of care more widely available. Reports have been circulated to institutions and organizations providing maternal care and to medical schools. Articles and case histories have been published, and many new protocols and procedures have been developed. Furthermore, seminars have been organized and training modules have been distributed to all involved in the provision of maternity care.
    MeSH terms: Adolescent; Adult; Cause of Death; Female; Postpartum Hemorrhage/mortality; House Calls; Humans; Malaysia; Maternal Mortality*; Pre-Eclampsia/mortality; Pregnancy; Pregnancy Complications, Cardiovascular/mortality; Prenatal Care; Puerperal Infection/mortality; Pulmonary Embolism/mortality; Review
  9. Hamzah AR, Jalaluddin MA, Raman R
    Ann. Otol. Rhinol. Laryngol., 1999 Mar;108(3):253-4.
    PMID: 10086617
    A patient with Turner's syndrome presented with a rare anomaly of absent oval window, inferiorly placed facial nerve, and abnormal stapes. To our knowledge, this is the first report of this combination of malformations.
    MeSH terms: Adult; Ear, Middle/abnormalities*; Facial Nerve/abnormalities; Female; Humans; Oval Window, Ear/abnormalities; Stapes/abnormalities; Turner Syndrome/complications*
  10. Wong CF, Yuen KH, Peh KK
    Int J Pharm, 1999 Mar 25;180(1):47-57.
    PMID: 10089291
    A method using a texture analyzer equipment and chicken pouch as the biological tissue was investigated for measuring the bioadhesive properties of polymers under simulated buccal conditions. The method was evaluated using two polymers, namely Carbopol 974P and Methocel K4M while the instrument variables studied included the contact force, contact time and speed of withdrawal of the probe from the tissue. The parameters measured were the work of adhesion and peak detachment force. Longer contact time and faster probe speed not only gave better reproducibility of results, but also better sensitivities for both parameters measured. On the other hand, a certain level of contact force was found essential for achieving good bioadhesion, above which there was no further contribution to the bioadhesion process. When the method was applied to determine the bioadhesiveness of several polymers, the values obtained for the work of adhesion and peak detachment force were quite consistent in the ranking of the polymers. The Carbopols were found to have the highest values, followed by gelatin, sodium carboxymethyl celluloses and hydroxypropylmethyl celluloses. On the other hand, Alginic acid, Eudragit RLPO and RSPO, and Chitosan appeared to have low bioadhesive values.
    MeSH terms: Adhesives*; Animals; Biomechanical Phenomena; Chickens; Mucous Membrane/metabolism; Technology, Pharmaceutical/instrumentation*; Reproducibility of Results
  11. Low KS, Lee CK, Koo WH
    Bull Environ Contam Toxicol, 1999 Apr;62(4):428-33.
    PMID: 10094725
    MeSH terms: Acids/isolation & purification; Acids/chemistry; Coloring Agents/isolation & purification; Coloring Agents/chemistry*; Hydrogen-Ion Concentration; Industrial Waste/analysis; Industry; Arachis*; Seeds; Spectrophotometry/methods; Water Pollutants, Chemical/analysis*; Water Pollutants, Chemical/isolation & purification
  12. Rohani MY, Raudzah A, Ng AJ, Ng PP, Zaidatul AA, Asmah I, et al.
    Epidemiol. Infect., 1999 Feb;122(1):77-82.
    PMID: 10098788
    During a 1-year period from October 1995 to September 1996, 273 isolations of Streptococcus pneumoniae were made from various types of clinical specimens. The majority of the isolates (39.2%) were from sputum whilst 27.5% were from blood, CSF and other body fluids. The organism was isolated from patients of all age groups, 31.1% from children aged 10 years and below, 64.7% of which come from children aged 2 years or below. The majority of the isolates belong to serotypes 1, 6B, 19B, 19F and 23F. Serotypes 1 and 19B were the most common serotypes associated with invasive infection. About 71.9% of the invasive infections were due to serotypes included in the available 23 valent polysaccharide vaccine. The rates of resistance to penicillin and erythromycin were 7.0 and 1.1% respectively. Our findings show that the serotypes of S. pneumoniae causing most invasive infections in Malaysia are similar to those in other parts of the world and the available vaccine may have a useful role in this population.
    MeSH terms: Adolescent; Adult; Aged; Aged, 80 and over; Bacterial Vaccines; Child; Child, Preschool; Drug Resistance, Microbial; Hospitalization; Humans; Infant; Malaysia/epidemiology; Microbial Sensitivity Tests; Middle Aged; Pneumococcal Infections/microbiology*; Pneumococcal Infections/epidemiology*; Pneumococcal Infections/prevention & control; Population Surveillance; Serotyping; Streptococcus pneumoniae/classification*; Age Distribution; Pneumococcal Vaccines
  13. Raman R
    PMID: 23119520 DOI: 10.1007/BF02997994
    A mechanical explanation for the hyperacousis that sometimes occurs after stapedectomy or stapedotomy is offered.
  14. Easton A
    BMJ, 1999 Apr 03;318(7188):893.
    PMID: 10102839
    MeSH terms: Animals; Disease Outbreaks; Disease Reservoirs; Encephalitis, Japanese/epidemiology*; Encephalitis, Japanese/prevention & control; Humans; Malaysia/epidemiology; Swine
  15. Pueppke SG, Broughton WJ
    Mol. Plant Microbe Interact., 1999 Apr;12(4):293-318.
    PMID: 10188270
    Genetically, Rhizobium sp. strain NGR234 and R. fredii USDA257 are closely related. Small differences in their nodulation genes result in NGR234 secreting larger amounts of more diverse lipo-oligosaccharidic Nod factors than USDA257. What effects these differences have on nodulation were analyzed by inoculating 452 species of legumes, representing all three subfamilies of the Leguminosae, as well as the nonlegume Parasponia andersonii, with both strains. The two bacteria nodulated P. andersonii, induced ineffective outgrowths on Delonix regia, and nodulated Chamaecrista fasciculata, a member of the only nodulating genus of the Caesalpinieae tested. Both strains nodulated a range of mimosoid legumes, especially the Australian species of Acacia, and the tribe Ingeae. Highest compatibilities were found with the papilionoid tribes Phaseoleae and Desmodieae. On Vigna spp. (Phaseoleae), both bacteria formed more effective symbioses than rhizobia of the "cowpea" (V. unguiculata) miscellany. USDA257 nodulated an exact subset (79 genera) of the NGR234 hosts (112 genera). If only one of the bacteria formed effective, nitrogen-fixing nodules it was usually NGR234. The only exceptions were with Apios americana, Glycine max, and G. soja. Few correlations can be drawn between Nod-factor substituents and the ability to nodulate specific legumes. Relationships between the ability to nodulate and the origin of the host were not apparent. As both P. andersonii and NGR234 originate from Indonesia/Malaysia/Papua New Guinea, and NGR234's preferred hosts (Desmodiinae/Phaseoleae) are largely Asian, we suggest that broad host range originated in Southeast Asia and spread outward.
    MeSH terms: Carbohydrate Sequence; Lipopolysaccharides/chemistry*; Molecular Sequence Data; Nitrogen Fixation/genetics; Rhizobium/genetics; Rhizobium/physiology; Rhizobium/chemistry*; Species Specificity; Reproducibility of Results
  16. Zamri-Saad M, Effendy AW, Israf DA, Azmi ML
    Vet. Microbiol., 1999 Mar 12;65(3):233-40.
    PMID: 10189198
    A study to determine the immunoglobulin and cellular responses in the respiratory tract of goats following intranasal exposures to formalin-killed Pasteurella haemolytica A2 was carried out. Forty-two goats were divided into two groups. Goats in Group 1 were subjected to double intranasal exposures to formalin-killed P. haemolytica A2 while goats in Group 2 were the unexposed control. Prior to and at weekly intervals post-exposure, three goats from each group were killed, serum samples were collected while the lungs were flushed with 50 ml normal saline before the right apical lobes were fixed in 10% buffered formalin. Both serum and lung lavage fluid were subjected to enzyme-linked immunosorbent assay (ELISA) to determine the levels of IgA, IgM and IgG while the formalin-fixed tissues were examined histologically. IgA levels in the lung lavage fluid increased rapidly to reach a significantly (p < 0.05) high level as early as Week 2 post-exposure and remained significantly (p < 0.05) high throughout the study period. The IgM levels increased at an intermediate rate to reach a significantly (p < 0.05) high level at Week 3 post-exposure before they decreased to an insignificant (p > 0.05) level the following week and the weeks thereafter. IgG levels increased gradually and only reached a significantly (p < 0.01) high level at Weeks 5 and 6 of the study. The size of the bronchus-associated lymphoid tissue (BALT) and the number of lymphocytes in BALT increased significantly from Week 2 and remained high thereafter. However, differences in the numbers of BALT were insignificant (p > 0.05) initially before becoming significantly (p < 0.05) high at Weeks 5 and 6. The BALT responses were parallel to those of imunoglobulins in the lung lavage fluid.
    MeSH terms: Administration, Intranasal; Animals; Antibodies, Bacterial/biosynthesis; Enzyme-Linked Immunosorbent Assay/veterinary; Formaldehyde/chemistry; Goats; Immunity, Cellular/immunology; Immunoglobulins/analysis; Immunoglobulins/blood; Lymphoid Tissue/immunology; Lymphoid Tissue/microbiology; Pasteurella Infections/immunology; Pasteurella Infections/veterinary*; Respiratory System/immunology*; Respiratory System/microbiology; Respiratory Tract Diseases/immunology; Respiratory Tract Diseases/veterinary*; Goat Diseases/immunology*; Goat Diseases/microbiology; Mannheimia haemolytica/immunology*; Bronchoalveolar Lavage/veterinary
  17. Wong KT, Shamsol S
    J. Cutan. Pathol., 1999 Jan;26(1):13-6.
    PMID: 10189239
    The association of mast cells with typical lesions of Kimura's disease was investigated by quantitative methods after immunohistochemical staining for Factor VIII-related antigen and counterstaining with toluidine blue. Formalin-fixed, paraffin-embedded, tissue sections from 9 confirmed cases of Kimura's disease were examined after staining to estimate mast cell and blood vessel densities by counting 100 random fields under oil immersion. There was a statistically significant increase of both mast cells and blood vessels in Kimura's disease (p<0.01) compared with normal skin and reactive lymph node controls. However, as far as the individual Kimura's disease lesion is concerned, there was generally no correlation between areas with mast cell increase and the degree of vascularity. Moreover, when lesions of less than 1 year's duration were compared with older lesions, there appeared to be a relative decrease in mast cells and a concomitant increase in vascularity in the latter. These results confirmed that mast cells are associated with Kimura's disease, and suggest that they may be involved in its early pathogenesis, although its possible role in angiogenesis may not be direct.
    MeSH terms: Adolescent; Adult; Angiolymphoid Hyperplasia with Eosinophilia/metabolism; Angiolymphoid Hyperplasia with Eosinophilia/pathology*; Cell Count; Child; Female; Humans; Immunohistochemistry; Male; Mast Cells/cytology; Mast Cells/pathology*; Mast Cells/chemistry; Middle Aged; Neovascularization, Pathologic; Skin/blood supply; Skin/pathology; Skin/chemistry; von Willebrand Factor/analysis
  18. Zhang CY, Tan BK
    Phytother Res, 1999 Mar;13(2):157-9.
    PMID: 10190192
    14-deoxyandrographolide (DA) and 14-deoxy-11,12-didehydroandrographolide (DDA) are two diterpenoids isolated from A. paniculata, a popular folk medicine used as an antihypertensive drug in Malaysia. We have previously reported that DDA exhibited a greater hypotensive effect in anaesthetized rats and a vasorelaxant activity in isolated rat aorta, compared with DA. Their vasorelaxant activities were mediated through the activation of the enzymes, nitric oxide synthase (NOS) and guanylyl cyclase. The present study demonstrated that both DA and DDA stimulated nitric oxide (NO) release from human endothelial cells. DDA compared with DA caused a greater production of NO; this is in line with the finding of the earlier study that the vasorelaxant effect of DDA was more dependent on endothelium than DA.
    MeSH terms: Antihypertensive Agents/pharmacology*; Cell Line; Diterpenes/pharmacology*; Dose-Response Relationship, Drug; Endothelium, Vascular/drug effects*; Endothelium, Vascular/metabolism; Humans; Malaysia; Phytotherapy; Nitric Oxide/metabolism*; Vasodilator Agents/pharmacology*
  19. Hashim HD
    Rev. - Off. Int. Epizoot., 1999 Apr;18(1):47-51.
    PMID: 10190203
    Besides response and recovery, prevention and preparedness are the two critical components of any contingency plan. The author discusses the various elements which must be present in the prevention and preparedness plan of countries in Asia. As the continent has such diverse peoples and veterinary infrastructures, the actual plan may vary from one country to another, but must incorporate those elements which are crucial to ensure the success of the preparedness plan.
    MeSH terms: Animals; Animal Diseases/epidemiology; Animal Diseases/prevention & control*; Asia/epidemiology; Disease Outbreaks/prevention & control; Disease Outbreaks/veterinary*; Emergency Medical Services/organization & administration; Humans; Quarantine/organization & administration; Quarantine/veterinary; Veterinary Medicine/organization & administration*
  20. Sharma HS, Sharma S
    J Accid Emerg Med, 1999 Mar;16(2):150-3.
    PMID: 10191459
    Foreign body aspiration is one of the leading causes of accidental death in children. Food items are the most common items aspirated in infants and toddlers, whereas older children are more likely to aspirate non-food items. Laryngeal impaction of a foreign body is very rare as most aspirated foreign bodies pass through the laryngeal inlet and get lodged lower down in the airway. Two rare cases of foreign body aspiration with subglottic impaction in very young children (under 2 years of age) are described. In both the cases subglottic impaction occurred consequent to attempted removal of foreign body by blind finger sweeping. The clinical presentation, investigations, and management of these rare cases are discussed.
    MeSH terms: Emergency Treatment; Endoscopy/methods*; Female; Follow-Up Studies; Foreign Bodies/diagnosis; Foreign Bodies/surgery*; Humans; Infant; Laryngoscopy; Larynx*; Male; Treatment Outcome
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