Displaying publications 61 - 80 of 173 in total

  1. Ambu, Stephen
    Climate change is a product of human actions. The extreme events such as flash floods, droughts, heat waves, earthquakes, volcano eruptions and tsunamis seen in the world today are the result of indiscriminate human intrusion into the environment. Vulnerable countries and populations are the most affected by these climatic events. This places a burden on the resources of these countries. The Kyoto Protocol is a milestone in environmental management and the impetus created by it must be maintained by carrying out the much needed research into appropriate mitigating measures that will alleviate the climate
    change impact globally. A paradigm shift is needed in addressing the associated risks on human health to assess socioeconomic determinants and the related impacts on disease burden. Some wealthy nations emphasize economic benefits and downplay sustainability goals, health and equality. However the rising cost of energy is beginning to influence their outlook towards this issue. The implications on economics, human health and wellbeing are implicit. In order to strike a balance between disadvantaged and privileged nations, many
    international agencies are spearheading various research agenda to improve adaptation programmes on effects of changing climatic conditions on health. Malaysia too has such programmes initiated under its 5-year development plans.
  2. Mak, Joon-Wah
    Developing and adult worms of the human lymphatic filarial parasites (Wuchereria bancrofti,
    Brugia malayi, and Brugia timori) are located mainly in the lymphatic system and occasionally in aberrant sites like subcutaneous and conjunctival cysts. Lymphatic
    pathology ranging from dilatation of lymphatic channels and lymphangiectasia are detected on ultrasonography in apparently healthy, amicrofilaraemic, but filarial antigen positive individuals in endemic areas. Microfilariae are distributed in various organs and may be associated with immune mediated pathology at these sites; tropical pulmonary eosinophilia is characterized by intense immune mediated destruction of microfilariae in the lung parenchyma. In the spleen and other sites, nodular granulomatous lesions can occur where microfilariae are trapped and destroyed. The finding of Wolbachia endosymbionts in all stages of lymphatic filarial parasites has provided new insight on the adverse reactions
    associated with anti-filarial chemotherapy. Inflammatory molecules mainly lipopolysaccharide (LPS)-like molecules released from endosymbionts on death of the
    parasites are largely responsible for the adverse reactions encountered during anti-filarial chemotherapy. Prenatal tolerance or sensitization to parasite derived molecules can immune-modulate and contribute to both pathology and susceptibility/resistance to infection. Pathological responses thus depend not only on exposure to filarial antigens/infection, but also on host-parasiteendosymbiont factors and to intervention with antifilarial treatment. Treatment induced or host mediated death of parasites are associated with various grades of inflammatory response, in which eosinophils and LPS from endosymbionts play prominent roles, leading to death of the parasite, granulomatous formation, organization and fibrosis. The non-human primate (Presbytis spp.) model of
    Brugia malayi developed for the tertiary screening of anti-filarial compounds has provided unique opportunities for the longitudinal study of the pathology associated with lymphatic filariasis. The pathology in this non-human primate model closely follows that seen in
    human lymphatic filarial infections and correlates with clinical evidence of lymphatic pathology as detected with ultrasonography. These studies also show that successful treatment as detected by loss of motility and calcification of worms on ultrasonography is associated with reversal of early dilatations of lymphatic channels.
  3. Khor, Geok-Lin
    It is estimated that more than 1.1 billion adults and 115 million children worldwide are overweight. In Malaysia, the second and third National Health and Morbidity Surveys in 1996 and 2006 respectively reported a three-fold increase in obesity prevalence among adults, surging from 4.4% to 14% over the 10-year period. Evidence of rising childhood obesity has also emerged. The aim of this article is to gather evidence from food availability data for an insight into population shifts in dietary patterns that may help explain the rising obesity in this country. The nutrition transition was delineated in conjunction with the epidemiologic transition in order to explain the convergence of dietary practices, and the high prevalence of obesity and diet-related non-communicable diseases worldwide. The Food Balance Sheets for Malaysia from 1967 to 2007 were used to provide estimates and trends for the availability of foods and calories. Evidence is generated that indicate at least two major upward shifts in the dietary patterns in Malaysia in the past 4 decades.
    These shifts have led to the rising availability of calories from animal products, and from sugar and sweeteners. These major dietary shifts, together with increased sedentariness, constitute core public health challenges faced in addressing the country’s obesity and noncommunicable diseases (NCD) conundrum.
  4. Kew, Siang-Tong
    Melanosis coli denotes brownish discoloration of the colonic mucosa found on endoscopy
    or histopathologic examination. The condition has no specific symptom on its own. It is a fairly frequent incidental finding of colonic biopsies and resection specimens. The pigmentation is caused by apoptotic cells which are ingested by macrophages and subsequently transported into the lamina propria, where lysosomes use them to produce lipofuscin pigment, not melanin as the name suggests. Melanosis coli develops in over 70% of persons who use anthraquinone laxatives (eg cascara sagrada, aloe, senna, rhubarb, and frangula), often within 4 months of use. Long-term use is generally believed to be necessary to cause melanosis coli.The condition is widely regarded as benign and reversible, and disappearance of the pigment generally occurs within a year of stopping laxatives. Although
    often due to prolonged use of anthraquinone, melanosis can probably result from other factors or exposure to other laxatives. It has been reported as a consequence of longstanding inflammatory bowel disease. Some investigators suggested that increase in apoptosis of
    colonic mucosa by anthraquinone laxatives increased the risk of colonic cancer. Recent data, including those from large-scale retrospective, prospective and experimental studies, did not show any increased cancer risk.
  5. Barling PM
    This review explores the digestibility of lactose by Malaysians, and the value of milk and other milk-derived products as sources of appropriate nutrition for Malaysians. Increased calcium intake through consumption of milk is an effective mechanism for increasing calcium uptake from the diet and thereby minimising the risk of development of osteoporosis in later life. Detailed information about rates of lactose intolerance, and adaptation to dietary lactose and its consequences for Malaysians, will help in the formulation of dietary advice, and improve commerial food manufaturing practice and Government policy
    directed to the minimization of rates of osteoporosis, which presents a substantial morbidity risk to elderly female Asians in particular.
  6. Zhou, Wenxin
    Chinese medicine is one of the most famous traditional medicines in the world with a glorious and long written history of at least 2000 years. Recently, acupuncture and the use of other herbal medicine are being gradually accepted globally. In 2011,the International Medical University (IMU) started the Chinese Medicine programme which is the first of its kind in a western medicine university in Malaysia.The author introduced the background of Chinese medicine and the curriculum of the Chinese Medicine programme established in IMU, analyzed the situation regarding the quality of lectures given by internal and
    external lecturers in this programme and also discussed on ways to integrate western and traditional medicine in IMU or in Malaysia. The launching of Chinese medicine in IMU is a great step in the development of IMU and also an important step in the development of medical education in Malaysia or even in South-east Asia.
  7. Teng CL
    In the developing world, clinical knowledge management in primary care has a long way to go. Clinical decision support systems, despite its promise to revolutionise healthcare, is slow in its implementation due to the lack of financial investment in information technology. Point-of-care resources, such as comprehensive electronic textbooks delivered via the web or mobile devices, have yet to be fully utilised by the healthcare organisation or individual clinicians. Increasing amount of applicable knowledge of good quality (e.g. clinical practice guidelines and other pre-appraised resources) are now available via the internet. The policy makers and clinicians need to be more informed about the potential benefits and
    limitations of these new tools and resources and make the necessary budgetary provision and learn how best to harness them for patient care.
  8. Sinniah, Davendralingam
    Shock, a major cause of morbidity and mortality in children, is the the most anxiety-provoking emergency that needs to be addressed urgently and effectively by the attending paediatrician. It is a state where the metabolic demands of the tissue are not met due to circulatory dysfunction. Unlike adults, hypotension is a very late feature of shock in children. As the child’s condition worsens, the clinical presentation of the different causes of shock become similar, and nullify any aetiological differences. Regardless of the type of shock, the final common pathway is inadequate tissue perfusion and oxygen supply to meet cellular demands. Delayed recognition and treatment result in progression from compensated reversible shock to uncompensated irreversible shock with widespread multiple system
    organ failure to death. This paper reviews the physiological basis, and pathophysiological classification of the various types of shock and their respective aetiologies. The clinical features of the different types of shock are described, and current diagnostic and therapeutic strategies are applied for the most effective and appropriate treatment for resuscitating the child in shock. A strong index of suspicion, early recognition, timely intervention and transfer to an intensive care unit are critical for successful outcomes in the management of paediatric shock.
  9. Judson, John Paul
    The relationship between anatomy and surgery has been historic and epic, spanning many centuries, complementing each other in medical education and being independent as well as interdependent in many ways. However, curricular changes that have happened globally in recent years with the introduction of several contemporary styles of medical teaching have subtly downplayed the importance of anatomy in medicine, allowing young doctors with poor knowledge of anatomy to become surgeons. With a whimsical introduction that metaphorically hints at the strained relationship that exists between anatomy and surgery, the article attempts to explore the ‘anatomy’ of anatomy itself, examining its origins in recorded ancient history, evolution along the centuries in tandem with surgery and its current status in medical education.
  10. Hla-Yee-Yee
    This paper traces the evolution of PBL in the International Medical University over a period
    of twenty years; since its inception in 1992 till 2012. It is a record of the reasons for the evolution, the people involved and the strategies adopted. The PBL in IMU has metamorphosed over the years from a paper-based complete case history into its present form of staggered release of information, paper-based or otherwise (videos, web-based, newspaper cuttings, debates). Strategies to improve student and facilitator buy-in, strengthening of facilitator training, adoption of PBL templates, innovations to improve student participation are discussed.
  11. Chu, Wan-Loy
    Microalgae are important biological resources that have a wide range of biotechnological
    applications. Due to their high nutritional value, microalgae such as Spirulina and Chlorella are being mass cultured for health food. A variety of high-value products including polyunsaturated fatty acids (PUFA), pigments such as carotenoids and phycobiliproteins, and bioactive compounds are useful as nutraceuticals and pharmaceuticals, as well as for industrial applications. In terms of environmental biotechnology, microalgae are useful for bioremediation of agro-industrial wastewater, and as a biological tool for assessment and monitoring of environmental toxicants such as heavy metals, pesticides and pharmaceuticals. In recent years, microalgae have attracted much interest due to their potential use as feedstock for biodiesel production. In Malaysia, there has been active research on microalgal biotechnology for the past 30 years, tapping into the potential of our
    rich microalgal resources for high-value products and applications in wastewater treatment and assessment of environmental toxicants. A culture collection of microalgae has been established, and this serves as an important resource for microalgal biotechnology
    research. Microalgal biotechnology should continue to be regarded as a priority area of research in this country.
  12. Chin, Ramon Beng Ong, Kim, Patricia Chooi Lim, Joon, Wah Mak
    Background: Many proteins released by cells to the blood and other fluids are glycoproteins. One set of glycoproteins carry the ABO blood group determinants and glycoproteins have been shown to be vital in determining the structure and organization of plasma membranes. There is evidence suggesting their important role in cell-to-cell contact, adhesion, hormone interaction and vital transformation. Differences in proteins and glycoproteins in the different human blood groups may influence the invasion process of Plasmodium falciparum. The objectives of the study were to determine whether there are any changes in proteins and glycoproteins of red blood cells upon infection by P. falciparum and whether these protein and glycoprotein changes differ in the various ABO blood groups.

    Methods: A Malaysian strain of P. falciparum was cultured in vitro in red blood cells from A, B, O and AB blood groups. Protein and glycoprotein profiles of uninfected and P. falciparum- infected red blood cells from the different human ABO blood groups were analyzed by SDS-PAGE. For protein bands, the gels were stained with Coomassie blue while glycoproteins were visualized following staining of gels using GelCode ® Glycoprotein Staining Kit.

    Results: Cell membranes of P. falciparum infected erythrocytes from different ABO blood groups have different glycoprotein profiles compared to uninfected cells. All the infected samples showed a prominent protein band of molecular weight 99 kDa which was not present in any of the uninfected samples while a 48 kDa band was seen in four out of the seven infected samples. The erythrocyte cell membranes of A and AB blood groups showed different glycoprotein profiles upon infection with P. falciparum when compared to those from blood groups B and O.

    Conclusion: The two glycoproteins of molecular weights 99 kDa and 48 kDa should be further studied to determine their roles in the pathogenesis of malaria and as potential targets for drug and vaccine development.
  13. Ambu, Stephen, Yin, Evelyn Synn Yeoh, Joon, Wah Mak, Chakravarthi, Srikumar
    The aim of the study was to assess the prevalence of Sarcocystis infection in wild and peri-urban rodents in some states in Peninsular Malaysia. The thigh muscle from these rodents were formalin preserved, sectioned and stained with hematoxylin and eosin and examined under light microscopy. Of the 146 muscle tissue examined only 73 were positive for Sarcocystis infection.
    Morphological identification showed the presence of some new morphological types to be present. Different species of Sarcocystis were seen in the sections but more extensive studies are needed to identify them to species level.
  14. Lim, Victor
    The discovery of antibiotics had been one of the most significant events in the history of medicine. Antibiotics had saved countless number of lives and had contributed significantly to the health of mankind.The emergence of resistance is however a major threat to the continued usefulness of antibiotics. There are now strains of bacteria which are resistant to virtually all available antibiotics and these strains are increasingly being encountered in clinical practice. The development of new agents had not kept pace with resistance and it is unlikely that there will be major breakthroughs in the near future. The world needs to conserve and prolong the useful lives of the existing agents. This can only be achieved through good antibiotic stewardship programmes. As antibiotic resistance is a global threat
    all major stakeholders have to work together to meet this challenge.
  15. Lim, Pek-Hong
    Nurse education is undergoing a process of transition. Nurses worldwide are working towards
    achievement of higher levels of education and training through an improved education system. Current trends and innovations in nursing education are emerging to prepare more nurses and to deliver education to students across geographical boundaries while taking into
    consideration their work and family responsibilities. The current trends and innovations in nursing education range from full time face-to-face interactions to distance education programmes. Teaching approaches such as blended learning, online or e-Learning have provided nurses with an avenue for continuing education for development and progression in their career pathways. Every nurse aspires to reach her highest potential. While the current trends and innovations in nursing education provides the flexibility for nurses to continue learning and upgrade their professional qualifications, there are issues to be considered in catering to the needs of the bottom billion nurses. An exploration of related issues will include views from different perspectives, such as that of the institution/provider, instructor/facilitator and student/learner involved in the development and implementation of the related education programmes.
  16. Rathbone, Michael John
    This article presents an overview of long acting products used in animal health, production
    and reproduction. The topic represents a niche field of controlled release that few formulation scientists become specialists and experts in, but it is a field which has made significant contribution to the area of controlled release technology, and one which is of major importance to human kind due to their dependence on farmed animals as a source of hide, protein, milk and eggs.
  17. Radhakrishnan, Ammu Kutty
    The immune system is the host natural defence against cancer. Cancers are caused by progressive growth of the progeny of a single transformed host cell. The immune system is generally not able to mount immune responses to “self-antigens”, due to various mechanisms of immunological tolerance that are in place. This means that despite possessing a natural defence against tumours, many of the cancer patients may not be able
    to mount an effective immune response to fight the tumours. Dendritic cells (DC) are highly specialised in antigen presenting that can initiate and stimulate immune responses. These cells have the ability to stimulate naïve T cell proliferation and perform specific stimulatory and tolerogenic functions respectively. When the DC are activated by antigens, these cells
    undergoes further maturation and migrate to secondary lymphoid tissues, present antigen to T cells and finally induce an immune response. The ability of the DC to activate naïve and primed T-lymphocytes makes these cells a good candidate to be explored as a potential immunotherapeutic agent that can modulate antitumour immune responses in the affected host.
  18. Lim KG, Chuah SW, Ee MST, Wong ZG, Murugesan A, Syed Azman SA
    Introduction: Bekam, an Islamic variant of cupping, is an ancient form of traditional medicine still practised today in Malaysia. There are published findings indicating that cupping benefits patients with low back pain, other musculoskeletal pain and even pain from cancer, herpes zoster and trigeminal neuralgia when pain is measured on an analogue scale. We proposed to investigate whether in addition to pain improvement on an analogue scale we could show if pain relief might be demonstrated in terms of reduction of analgesic use.

    Methods: We carried out a retrospective cross sectional study on subjects who had been for outpatient clinic treatment with chronic pain of at least one month and who completed at least two bekam therapy sessions. In addition to documenting a pain score before and after therapy we documented their analgesic consumption.

    Results: A total of 77 respondents, with overlapping symptoms of headache, backache and joint pains were included. The mean pain score before bekam therapy was 6.74±1.78, and was 2.66±1.64 after two sessions of therapy. Twenty eight respondents completed six sessions of bekam therapy and had a mean pain score of 2.25±1.32 after. Thirty-four patients consumed analgesic medication before starting bekam therapy and only twelve did so after. The consumption of analgesics was significantly lower after bekam therapy.

    Conclusions: Bekam therapy appears to help patients experience less pain and reduce the amount of analgesic medication they consume. Nevertheless only a randomised prospective study will eliminate the biases a retrospective study is encumbered with and we believe would be worth doing.
  19. Meera Thalayasingam, Shek, Lynette Pei-Chi
    Anaphylaxis in the operating room although infrequent can be potentially fatal. The diagnosis of perioperative anaphylaxis is complex due to a multitude of factors. Firstly, patients under anesthesia cannot verbalize their complaints, the anesthetic agents themselves can alter vital parameters (e.g. heart rate and blood pressure) and cutaneous signs in a completely draped patient may be missed. Secondly, the differential diagnosis of intraoperative anaphylaxis is wide. Conditions such as asthma exacerbation, arrhythmia, hemorrhage, angioedema, mastocytosis, acute myocardial infarction, drug overdose, pericardial tamponade, pulmonary edema, pulmonary embolus, sepsis, tension pneumothorax, vasovagal reaction, venous air embolism, laryngospasm, blood transfusion reaction and malignant hyperthermia need to be considered. Thirdly, the diagnostic workup is challenging due to the multiple medications administered and other exposures encountered such as latex and chlorhexidene. However, through a timely allergy consultation and a systematic approach, identification of the culprit agent and safe alternatives can be established to prevent future occurrences as illustrated in the case below.
  20. Sinniah D, Khoo EJ
    The sale of tobacco-based cigarettes has declined in western countries, and ‘Big Tobacco’ is trying to make up the deficit in profits from the developing world. The recent introduction of e-cigarette, in which they have invested both their hopes and their finances, has been a boon to them as it serves to confuse smokers and non-smokers about the real issues relating to the toxicity, dangers, and the promotion of nicotine addiction especially among youths who have not previously smoked cigarettes. E-cigarettes cause inflammation and damage to epithelial cells in human airways and increased risk of infection. E-cigarette vapour contains more carcinogens like formaldehyde and acetaldehyde compared to a regular cigarette. Longterm vaping is associated with an incremental lifetime cancer risk. E-cigarettes are neither safe nor effective in helping smokers quit; there is enough evidence to caution children, adolescents, pregnant women, and women of reproductive age about e-cigarette’s potential for long term consequences to foetal and adolescent brain development that sub-serve emotional and cognitive functions. The nicotine effects that cause modification of late CNS development constitute a hazard of adolescent nicotine use. The American Heart Association (AHA), Food and Drug Administration (FDA), World Health Organisation (WHO) and twothirds of the major nations in the world discourage the promotion of e-cigarettes as an alternative to proven nicotine-addiction treatments. Doctors, health care workers, and medical students should be armed with the facts about e-cigarettes, its dangers, and the legal status concerning its use, in order to be able to offer proper counselling to patients and adolescents, in particular, with special reference to the Malaysian context.
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