Welcome to NIH Research Digital Repository System


The NIH Research Digital Repository System is a dedicated platform designed for NIH to manage its institutional research materials. Its main objective is to provide a centralized hub to enable the institution to collect, protect, and distribute its scientific and intellectual contributions to ensure the visibility and long-term preservation of the intellectual assets of the institution.

Research outputs
1176
Projects
0
People
0
Recent Additions
  • Publication
    A Survey of Acarine Ectoparasites of Bats (Chiroptera) in Malaysia
    (Research Gate, 2013-01)
    Mariana Ahamad
    ;
    Halimaton Ibrahim
    ;
    Mohd Kulaimi Bujang
    ;
    Shahrul-Anuar Mohd Sah
    ;
    Norzalipah Mohamad
    ;
    Shukor Mohd Nor
    ;
    Abdul Hamid Ahmad
    ;
    Tze-Ming Ho
    A comprehensive 8-yr survey of acarine ectoparasites (ticks and mites) of bats was carried out in 18 localities from 2002 to 2009. Most of the surveys were conducted during 14 national biodiversity scientific expeditions throughout Malaysia. The objective was to identify acarines of known public health importance from bats and thus determine whether there is any potential public health risk in Malaysia. Trapping of bats was conducted using Harp traps and Mist nets. In total, 1,579 individuals comprising of 6 families and 52 species of bats were examined alive. In general, 25.6% of the bats were infested with acarines. Infestation rates of ticks, mesostigmatid mites, and chiggers on bats examined were 0.4, 10.4, and 14.7%, respectively. Their prevalence and mean intensity were tabulated. Genera of ticks extracted were Amblyomma, Dermacentor, Ixodes, and Ornithodoros. Of these genera, only two species can be identified to species level and they are Amblyomma cordiferum and Ixodes simplex. In total, 8 genera and 15 species of mesostigmatid mites were found; the species were Ancystropus eonycteris, Ancystropus zeleborii, Echinonysus nasutus, Laelaps aingworthae, Laelaps nuttalli, Laelaps sanguisugus, Laelaps sculpturatus, Longolaelaps longulus, Longolaelaps whartonii, Meristaspis lateralis, Meristaspis macroglossi, Paraperiglischrus rhinolophinus, Spinturnix acuminatus, Spinturnix americanus, and Spinturnix bakeri. Chiggers on bats were represented by 12 genera and 6 species; the species identified were Gahrliepia fletcheri, Riedlinia lipoxena, Trombigastia cadei, Walchiella impar, Walchiella oudemansi, and Whartonia caobangensis. The study produced an up-to-date list of acarine ectoparasites of bats in Malaysia where a total of 38 genera and 47 species of acarines were listed. Findings of the study demonstrated that 5 genera and 1 species of acarines that may pose potential health risks, can be found on bats.
  • Publication
    Non-pharmacological measures for preventing opportunistic infection in patients with haematological malignancies
    (The Cochrane Collaboration. Published by John Wiley & Sons, Ltd., 2014)
    Rahizan Issa
    ;
    Nor Asiah Muhamad
    ;
    Nai Ming Lai
    ;
    Rohaidah Hashim
    ;
    Ezalia Esa
    ;
    Mohd Yusoff Adon
    ;
    Normi Mustapha
    ;
    Wan Ariffin Abdullah
    ;
    Tsiao Yi Yap
    ;
    Azura Mohd Noor
    This is a protocol for a Cochrane Review (Intervention). The objectives are as follows: To evaluate the eAicacy and safety of non-pharmacological measures for preventing opportunistic infections in patients with haematological malignancies.
  • Publication
    Reducing blood culture contamination rate: A quality assurance project in a Malaysian tertiary hospital
    (2014)
    Siti Roszilawati Ramli
    ;
    Sabarina Zahari
    ;
    Azura Sadri
    ;
    Zahrotul Farihah Aziz
    ;
    Alex Francis
    Blood cultures contamination is a common scenario in Malaysian hospitals. Reducing the contamination rate of blood culture will reduce false-positive blood culture, prevent inappropriate antibiotic prescription and reduce patient management cost. This is a 6 months study specifically focused on the effects of changing the type of skin antiseptics used (70% isopropyl alcohol plus 2% chlorhexidine replacing 70% isopropyl alcohol plus povidone-iodine) and improving the knowledge and techniques of blood culture taking in a tertiary hospital. The remedial measures introduced were successful in achieving 4.34% contamination rate, which is 2.03% less than pre-remedial contamination rate (6.37%). There was a statistically significant reduction in the number of contaminants (p = 0.02) with five-fold rise in the significant blood cultures results. Better choice of skin antiseptics and good blood culture knowledge and technique may contribute to reduce number of contamination rate in blood culture.
  • Publication
    Influenza seasonality and vaccination timing in tropical and subtropical areas of southern and south-eastern Asia
    (2014-02-24)
    Siddhartha Saha
    ;
    Mandeep Chadha
    ;
    Abdullah Al Mamun
    ;
    Mahmudur Rahman
    ;
    Katharine Sturm-Ramirez
    ;
    Malinee Chittaganpitch
    ;
    Sirima Pattamadilok
    ;
    Sonja J Olsen
    ;
    Ondri Dwi Sampurno
    ;
    Vivi Setiawaty
    ;
    Krisna Nur Andriana Pangesti
    ;
    Gina Samaan
    ;
    Sibounhom Archkhawongs
    ;
    Phengta Vongphrachanh
    ;
    Darouny Phonekeo
    ;
    Andrew Corwin
    ;
    Sok Touch
    ;
    Philippe Buchy
    ;
    Nora Chea
    ;
    Paul Kitsutani
    ;
    Le Quynh Mai
    ;
    Vu Dinh Thiem
    ;
    Raymond Lin
    ;
    Constance Low
    ;
    Chong Chee Kheong
    ;
    Norizah Ismail
    ;
    Mohd Apandi Yusof
    ;
    Amado Tandoc
    ;
    Vito Roque
    ;
    Akhilesh Mishra
    ;
    Ann C Moen
    ;
    Marc-Alain Widdowson
    ;
    Jeffrey Partridge
    ;
    Renu B Lal
    Objective: To characterize influenza seasonality and identify the best time of the year for vaccination against influenza in tropical and subtropical countries of southern and south-eastern Asia that lie north of the equator. Methods: Weekly influenza surveillance data for 2006 to 2011 were obtained from Bangladesh, Cambodia, India, Indonesia, the Lao People’s Democratic Republic, Malaysia, the Philippines, Singapore, Thailand and Viet Nam. Weekly rates of influenza activity were based on the percentage of all nasopharyngeal samples collected during the year that tested positive for influenza virus or viral nucleic acid on any given week. Monthly positivity rates were then calculated to define annual peaks of influenza activity in each country and across countries. Findings: Influenza activity peaked between June/July and October in seven countries, three of which showed a second peak in December to February. Countries closer to the equator had year-round circulation without discrete peaks. Viral types and subtypes varied from year to year but not across countries in a given year. The cumulative proportion of specimens that tested positive from June to November was >60% in Bangladesh, Cambodia, India, the Lao People’s Democratic Republic, the Philippines, Thailand and Viet Nam. Thus, these tropical and subtropical countries exhibited earlier influenza activity peaks than temperate climate countries north of the equator. Conclusion: Most southern and south-eastern Asian countries lying north of the equator should consider vaccinating against influenza from April to June; countries near the equator without a distinct peak in influenza activity can base vaccination timing on local factors.
  • Publication
    Bioefficacy of a long-lasting insecticide impregnated net on blood feeding inhibition of Anopheles maculatus Theobald and Culex quinquefasciatus Say
    (2014)
    Tan Swee Beng
    ;
    Indra Vythilingam
    ;
    Lee Han Lim
    This study aimed to evaluate the bioefficacy and blood feeding inhi bition of mosquitoes under laboratory conditions using the WHO tunnel test method on unwashed and washed long-lasting insecticide impregnated net with extrinsic heat treatment of 30ºC followed by 80ºC on the same net during washing. PermaNet® exhibited fairy high durability to washing (5 washes) and had fairy long-lasting bioefficacy against Anopheles maculatus for blood feeding inhibition on both unwashed (39 months) and washed (26 months) nets. However, Perma Net exhibited lower bioefficacy against Culex quinquefasciatus. This study also suggested that the application of extrinsic heat treatment of 30ºC followed by an increased heat at 80ºC on the same net exerted significant differences (p0.05). An. maculatus exhibited significant differences in resting preference after a successful blood meal, as more blood-fed and live females preferred to rest and stay near the bait in the mouse cage, and more dead and unfed females were found in the outer cage of both the unwashed and washed nets (p<0.05).
Most viewed
  • Publication
    Effectiveness of a community-based intervention for weight loss on cardiometabolic risk factors among overweight and obese women in a low socio-economic urban community: findings of the MyBFF@home
    (2018)
    Ahmad Zamri Liyana
    ;
    Geeta Appannah
    ;
    Siti Yazmin Zahari Sham
    ;
    Mansor Fazliana
    ;
    Noor Safiza Mohamad Nor
    ;
    Rashidah Ambak
    ;
    Azah Abdul Samad
    ;
    Nofi Yuliani Dahlan
    ;
    Tahir Aris
    Background: The effectiveness of lifestyle intervention for weight loss on cardiometabolic risk factors among overweight and obese individuals in the community setting remains inconclusive. This study aimed to evaluate the effect of a 6-month weight loss lifestyle intervention on cardiometabolic risk factors among overweight and obese women and the sustainability of the changes in those markers at 12-month follow-up, comparing an intervention group with a control group. Methods: A total of 243 participants from MyBFF@home were included in this study. Fasting blood samples at baseline, 6- and 12-month were assessed for fasting plasma glucose (FPG), total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C) and triglycerides. The effect of the intervention on cardiometabolic risk markers were investigated within and between study groups using t-test and general linear model (GLM) repeated measure ANOVA. Results: Results from repeated measures ANOVA showed intervention effect only in TC where significant reduction was found in the intervention group (− 0.26 mmol/L [95% CI: – 0.47 to − 0.06], p < 0.01) compared to the control group (− 0.06 mmol/L [95% CI: – 0.28 to 0.17]) at 12 months. At 6 months, TC was reduced significantly in both groups but only intervention group retained the reduction in maintenance phase while, the level increased significantly in the control group (0.22 mmol/L [95% CI: 0.06 to 0.38]). This attributed to significant increase in TC/HDL-C ratio in the control group during maintenance phase (0.32 [95% CI: 0.15 to 0.50], p < 0.001). The intervention group also showed trend of reduction in FPG at 6 months and further decreased during maintenance phase (− 0.19 mmol/L [95% CI: – 0. 32 to − 0.06], p < 0.01). At 6 months HDL-C was maintained in the intervention group but reduced significantly in the control group (− 0.05 mmol/L [95% CI: – 0.10 to − 0.01], p < 0.05). No significant difference was detected in both markers when compared between groups. Conclusions: In the context of low socio-economic communities, this study supports that weight loss related lifestyle modifications over a 6-month period could improve selected cardiometabolic risk factors, particularly fasting glucose, TC and HDL-C in overweight and obese women with favourable sustainability over a 12-month period.
  • Publication
    Unplanned Pregnancy and Its Associated Factors
    (2018)
    Muslimah Yusof
    ;
    Azah Abdul Samad
    ;
    Maisarah Omar
    ;
    Noor Ani Ahmad
    INTRODUCTION: Unplanned pregnancy is a major public health concern globally. Numerous studies found various factors that can predict or determine unplanned pregnancy. However, there were no studies that reported this problem in Malaysia. The objective of this study is to determine the prevalence of unplanned pregnancy in Malaysia and the associated factors. METHODS: This nationwide cross-sectional study targeted to women at postpartum period at government primary health care clinics throughout Malaysia. Structured questionnaire with face-to-face interview was used for data collection. The factors studied included mothers’ age, husband’s age, ethnicity, religion, marital status, education, occupation, household income, polygamous marriage, family support, contraception used, and disagreement of husband on contraception, smoking and alcohol consumption. History of emotional, physical and sexual intimate partner violence (IPV) were also studied. RESULTS: A total of 5727 Malaysian postpartum mothers were involved in this survey. The prevalence of unplanned pregnancy was 42.9% (95% CI: 38.6, 47.4). The multivariate logistic regression revealed that older mothers aged 45-49 years old (aOR: 8.010; 95%CI: 1.909, 33.013) and Muslim mothers (aOR: 2.465; 95%CI: 1.432-4.241) were significantly associated with unplanned pregnancy. In terms of household income, mothers with less than RM1000 per month were 1.712 (95% CI: 1.080, 2.713) times more likely to have unplanned pregnancy. The other significant associated factor was history of emotional intimate partner violence; aOR [1.720 (95% CI: 1.011, 2.925)]. CONCLUSIONS: Unplanned pregnancies were observed to be higher among older Muslim women from low income family. A possibility of unmet need for family planning should be considered and appropriate intervention strategies planned for these at-risk population.
  • Publication
    Predictors of Recurrent Ischemic Stroke in Obese Patients With Type 2 Diabetes Mellitus: A Population-based Study
    (Elsevier, 2020)
    Orwa Albitar
    ;
    Sabariah Noor Harun
    ;
    Nur Ezzati Abidin
    ;
    Balamurugan Tangiisuran
    ;
    Hadzliana Zainal
    ;
    Irene Looi
    ;
    Khairul Azmi Ibrahim
    ;
    Norsima Nazifah Sidek
    ;
    Keat Wei Loo
    ;
    Keng Yee Lee
    ;
    Zariah Abdul Aziz
    ;
    Siti Maisharah Sheikh Ghadzi
    Background: Diabetes and obesity are established risk factors for stroke. The current study aimed to assess risk factors of ischemic stroke recurrence in diabetic patients based on their body mass index (BMI). Methods: A total of 4005 diabetic patients who had a history of ischemic stroke were identified in a retrospective cross-sectional dataset from the Malaysian National Neurology Registry. Patients were classified based on BMI, and multivariable regression analysis was used to evaluate the association between risk factors and recurrent ischemic stroke. Results: Among obese patients, those with ischemic heart disease (aOR, 1.873; 95% CI, 1.131–3.103), received formal education (aOR, 2.236; 95% CI, 1.306–3.830), and received anti-diabetic medication (aOR, 1.788; 95% CI, 1.180–2.708) had a higher stroke recurrence risk, while receiving angiotensin receptors blockers (aOR, 0.261; 95% CI, 0.126–0.543) lowered the odds of recurrence. Overweight patients with hypertension (aOR, 1.011; 95% CI, 1.002–1.019) for over 10 years (aOR, 3.385; 95% CI, 1.088–10.532) and diabetes prior to the first stroke (aOR, 1.823; 95% CI, 1.020–3.259) as well as those received formal education (aOR, 2.403; 95% CI, 1.126–5.129) had higher odds of stroke recurrence, while receiving angiotensin-converting enzyme inhibitors (aOR, 0.244; 95% CI, 0.111–0.538) lowered the recurrence risk. Normal weight East Malaysians (aOR, 0.351; 95% CI, 0.164–0.750) receiving beta-blockers (aOR, 0.410; 95% CI, 0.174–0.966) had lower odds of stroke recurrence. Conclusions: Ischemic heart disease, hypertension, receiving anti-hypertensive agents, and educational level were independent predictors of recurrent stroke in obese patients. Managing the modifiable risk factors can decrease the odds of stroke recurrence.
  • Publication
    Special pathology and therapeutics of the diseases of domestic animals: Volume III - diseases of the urinary organs, blood and blood producing organs, spleen, metabolism, nervous system, organ of locomotion, and skin
    (1938)
    Crawford, R
    Ruminants continue to be important in their traditional role in agricultural research and teaching. They are now also extensively used for studies in molecular biology; genetic engineering; and biotechnology for basic science, agricultural and clinical applications. Concern and interest for the welfare for these species and improved understanding of their biology and behavior have continued and are reflected in changing husbandry and management systems. This chapter addresses at high levels basic biology, husbandry, and the more common or important diseases of the three ruminant species used most commonly in the laboratory, namely sheep, goats and cattle.
  • Publication
    HLA in the Immune Response
    (Kuala Lumpur: Institute for Medical Research, 2012)
    Batoul Siddiq Mohamed Siddig Bashasha
    When foreign antigen gains entry into the bod several important changes may by initiated , collectively known as the immune response , which result in the elimination of the alien antigen A remarkable feature of this phenomenon is the ability of the adult mammal to distinguish between its own antigens ( known as self antigen) and those external or foreign origin ( known as non self antigens) This means that as a general rule, antibody is selectively produced in response to foreign substances yet it is not produced to antigens that are recognized as "self