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  1. Salleh NA, Wong HS, Mohd Isa HD
    Korean J Fam Med, 2016 May;37(3):197-201.
    PMID: 27274392 DOI: 10.4082/kjfm.2016.37.3.197
    In patients with thyroid disease, ocular involvement or thyroid ophthalmopathy is common, irrespective of their thyroid status. A common feature of thyroid eye disease is eyelid retraction, which leads to a classical starry gaze (Kocher sign). Treatment with radioactive iodine (RAI) is a known therapy for hyperthyroidism. However, this treatment may lead to or worsen thyroid ophthalmopathy. We report a case series of two patients with thyrotoxicosis, who presented with an atypical and subtle occurrence of thyroid eye disease (TED) soon after RAI therapy. One of the patients was initially diagnosed and treated for dry eyes; however, over a period of time, the patient's vision progressively deteriorated. Clinical and radiological investigations confirmed thyroid ophthalmopathy with low serum thyroid hormone levels. Both patients recovered well after immediate intensive intravenous steroid treatment. These cases highlight the importance of recognizing partial ptosis as one of the presenting signs of active TED among general practitioners and physicians.
  2. Khoo CH, Sim JH, Salleh NA, Cheah YK
    Antonie Van Leeuwenhoek, 2015 Jan;107(1):23-37.
    PMID: 25312847 DOI: 10.1007/s10482-014-0300-7
    Salmonella is an important food-borne pathogen causing disease in humans and animals worldwide. Salmonellosis may be caused by any one of over 2,500 serovars of Salmonella. Nonetheless, Salmonella enterica serovar Typhimurium and Salmonella enterica serovar Agona are the second most prevalent serovars isolated from humans and livestock products respectively. Limited knowledge is available about the virulence mechanisms responsible for diarrheal disease caused by them. To investigate the contribution of sopB, sopD and pipD as virulence factors in intracellular infections and the uniqueness of these bacteria becoming far more prevalent than other serovars, the infection model of Caenorhabditis elegans and phenotypic microarray were used to characterize their mutants. The strains containing the mutation in sopB, sopD and pipD genes were constructed by using latest site-specific group II intron mutagenesis approach to reveal the pathogenicity of the virulence factors. Overall, we observed that the mutations in sopB, sopD and pipD genes of both serovars did not exhibit significant decrease in virulence towards the nematode. This may indicate that these virulence effectors may not be universal virulence factors involved in conserved innate immunity. There are significant phenotypic differences amongst strains carrying sopB, sopD and pipD gene mutations via the analysis of biochemical profiles of the bacteria. Interestingly, mutant strains displayed different susceptibility to chemical stressors from several distinct pharmacological and structural classes when compared to its isogenic parental strains. These metabolic and chemosensitivity assays also revealed multiple roles of Salmonella virulence factors in nutrient metabolism and antibiotic resistance.
  3. John R, Mohd Salleh NA, Nik Farid ND
    Cureus, 2024 May;16(5):e60230.
    PMID: 38751405 DOI: 10.7759/cureus.60230
    Background The sexual well-being of youths is crucial as it establishes the foundation for their sexual health throughout their lives. Malaysia's Ministry of Health (MOH) mainly delivers sexual reproductive health (SRH) services. Besides MOH, the National Population Family Development Board (NPFDB), under the purview of the Ministry of Women, Family and Community Development and Federation of Reproductive Health Association Malaysia, works closely with MOH to ensure the delivery of SRH information and services. Despite the availability of SRH services in Malaysia, it is uncertain whether youths are aware of and utilize these services. This study aims to identify factors that affect the utilization of SRH services among youths aged 18-24 years in Malaysia. Methodology This web-based, cross-sectional study was conducted from March 2022 to June 2022 using a self-administered pre-tested questionnaire. Andersen's Behavioral Model of Health Service Utilization was used to identify the variables included in the survey. Bivariate and multivariate logistic regression models were used to determine factors significantly associated with the utilization of SRH services. Adjusted odds ratio (AOR) and 95% confidence interval (CI) with a p-value <0.05 were considered to denote statistical significance. Results A total of 617 youths aged 18-24 years participated in the survey. Only 20.4% (n = 126) of youths had visited SRH services in their entire life, and only 8.4% (n = 52) of youths had visited SRH services in the past year. Predisposing factors such as age, marital status, exposure to SRH information from family and governmental agencies such as the NPFDB, enabling factors such as availability and comfort of SRH services, and need factors such as youths diagnosed with SRH-related diseases were significantly associated with SRH utilization. The older age group (20-24 years old) was more likely to utilize SRH services compared to the 18-19-year age group (AOR = 1.634, 95% CI = 1.041, 2.564, p = 0.033). Married participants were three times more likely to utilize SRH services than single participants (AOR = 2.910, 95% CI = 1.356, 6.249, p = 0.006). Participants who vaped had more odds of utilizing SRH services (AOR = 1.793, 95% CI = 1.014, 3.174, p = 0.045) The group of participants exposed to information on SRH from family had more odds of utilizing SRH service than those who did not receive information on SRH from the family (AOR = 1.964, 95% CI = 1.229, 3.138, p = 0.005). Likewise, participants who received SRH information from governmental agencies were more likely to utilize SRH services (AOR = 1.929, 95% CI = 1.202, 3.095, p = 0.006). Enabling factors that were associated with SRH utilization were the availability of services, described as self-buying medicine in pharmacies (AOR = 1.830, 95% CI = 1.184, 2.855, p = 0.007), and the comfortability of services (AOR = 1.928, 95% CI = 1.250, 2.974, p = 0.003). Youths who were diagnosed with SRH diseases (need factor) were four times more likely to utilize SRH services (AOR = 4.490, 95% CI = 1.935, 10.410, p < 0.001). Conclusions There is generally poor SRH service utilization and awareness among youths in Malaysia, which could be improved. The findings of this study can be used to influence SRH providers to offer a more age-targeted awareness program to meet the various SRH needs of youths.
  4. Salleh NA, Ismail S, Ab Halim MR
    Pharmacognosy Res, 2016 Oct-Dec;8(4):309-315.
    PMID: 27695274 DOI: 10.4103/0974-8490.188873
    BACKGROUND: Curcuma xanthorrhiza is a native Indonesian plant and traditionally utilized for a range of illness including liver damage, hypertension, diabetes, and cancer.
    OBJECTIVE: The study determined the effects of C. xanthorrhiza extracts (ethanol and aqueous) and their constituents (curcumene and xanthorrhizol) on UDP-glucuronosyltransferase (UGT) and glutathione transferase (GST) activities.
    MATERIALS AND METHODS: The inhibition studies were evaluated both in rat liver microsomes and in human recombinant UGT1A1 and UGT2B7 enzymes. p-nitrophenol and beetle luciferin were used as the probe substrates for UGT assay while 1-chloro-2,4-dinitrobenzene as the probe for GST assay. The concentrations of extracts studied ranged from 0.1 to 1000 μg/mL while for constituents ranged from 0.01 to 500 μM.
    RESULTS: In rat liver microsomes, UGT activity was inhibited by the ethanol extract (IC50 =279.74 ± 16.33 μg/mL). Both UGT1A1 and UGT2B7 were inhibited by the ethanol and aqueous extracts with IC50 values ranging between 9.59-22.76 μg/mL and 110.71-526.65 μg/Ml, respectively. Rat liver GST and human GST Pi-1 were inhibited by ethanol and aqueous extracts, respectively (IC50 =255.00 ± 13.06 μg/mL and 580.80 ± 18.56 μg/mL). Xanthorrhizol was the better inhibitor of UGT1A1 (IC50 11.30 ± 0.27 μM) as compared to UGT2B7 while curcumene did not show any inhibition. For GST, both constituents did not show any inhibition.
    CONCLUSION: These findings suggest that C. xanthorrhiza have the potential to cause herb-drug interaction with drugs that are primarily metabolized by UGT and GST enzymes.
    SUMMARY: Findings from this study would suggest which of Curcuma xanthorrhiza extracts and constituents that would have potential interactions with drugs which are highly metabolized by UGT and GST enzymes. Further clinical studies can then be designed if needed to evaluate the in vivo pharmacokinetic relevance of these interactions Abbreviations Used: BSA: Bovine serum albumin, CAM: Complementary and alternative medicine, cDNA: Complementary deoxyribonucleic acid, CDNB: 1-Chloro-2,4-dinitrobenzene, CuSO4.5H2O: Copper(II) sulfate pentahydrate, CXEE: Curcuma xanthorrhiza ethanol extract, CXAE: Curcuma xanthorrhiza aqueous extract, GC-MS: Gas chromatography-mass spectroscopy, GSH: Glutathione, GST: Glutathione S-transferase, KCl: Potassium chloride, min: Minutes, MgCl2: Magnesium chloride, mg/mL: Concentration (weight of test substance in milligrams per volume of test concentration), mM: Milimolar, Na2CO3: Sodium carbonate, NaOH: Sodium hydroxide, nmol: nanomol, NSAIDs: Non-steroidal antiinflammatory drug, p-NP: para-nitrophenol, RLU: Relative light unit, SEM: Standard error of mean, UDPGA: UDP-glucuronic acid, UGT: UDP-glucuronosyltransferase.
    KEYWORDS: Curcuma xanthorrhiza; UDP-glucuronosyltransferase; glutathione transferase; xanthorrhizol
  5. Learn-Han L, Yoke-Kqueen C, Salleh NA, Sukardi S, Jiun-Horng S, Chai-Hoon K, et al.
    Antonie Van Leeuwenhoek, 2008 Oct;94(3):377-87.
    PMID: 18548329 DOI: 10.1007/s10482-008-9254-y
    Forty-eight strains of Salmonella enterica subsp. enterica serovar Agona and 33 strains of Salmonella enterica subsp. enterica serovar Weltevreden were characterized by random amplified polymorphic DNA (RAPD) fingerprinting using 3 different arbitrary primer, Enterobacterial Repetitive Intergenic Consensus-Polymerase Chain Reaction (ERIC-PCR) and antimicrobial susceptibility testing. By using RAPD, 81 strains (44 strains of S. Agona and 33 strains of S. Weltevreden) can be clustered into 14 groups and 6 single isolates whereas ERIC-PCR produced 7 clusters and 3 single isolates. Thirteen antimicrobial agents were used and all the isolates were resistant to erythromycin and showed Multiple Antimicrobial Resistance indexes, ranging from 0.08 to 0.62. Poultry still remain as the common reservoir for multi-drug-resistant Salmonella. On the other hand, vegetables contaminated with S. Weltevreden showed a gain in antimicrobial resistance. Besides that, consistent antibiograms were observed from S. Weltevreden isolated at Kajang wet market on 2000/08/02.
  6. Mohd Salleh NA, Fairbairn N, Nolan S, Barrios R, Shoveller J, Richardson L, et al.
    HIV Med, 2019 10;20(9):606-614.
    PMID: 31359615 DOI: 10.1111/hiv.12777
    OBJECTIVES: We sought to examine the association between dispensation of methadone maintenance therapy (MMT) and antiretroviral therapy (ART) at the same facility, across multiple low-barrier dispensing outlets, and achieving optimal adherence to ART among people who use illicit drugs (PWUD).

    METHODS: We used data from the AIDS Care Cohort to Evaluate Exposure to Survival Services (ACCESS) study, a long-running study of a community-recruited cohort of HIV-positive PWUD, linked to comprehensive HIV clinical records in Vancouver, Canada, a setting of no-cost, universal access to HIV care. The longitudinal relationship between MMT-ART dispensation at the same facility and the odds of ≥ 95% ART adherence was analysed using multivariable generalized linear mixed-effects modelling. We conducted a further analysis using a marginal structural mode with inverse probability of treatment weights as a sensitivity analysis.

    RESULTS: This study included data on 1690 interviews of 345 ART- and MMT-exposed participants carried out between June 2012 and December 2017. In the final multivariable model, MMT-ART dispensation, compared with nondispensation at the same facility, was associated with greater odds of achieving ≥ 95% adherence [adjusted odds ratio (AOR) 1.56; 95% confidence interval (CI) 1.26-1.96]. A marginal structural model estimated a 1.48 (95% CI 1.15-1.80) greater odds of ≥ 95% adherence among participants who reported MMT-ART dispensation at the same facility compared with those who did not.

    CONCLUSIONS: The odds of achieving optimal adherence to ART were 56% higher during periods in which MMT and ART medications were dispensed at the same facility, in a low-barrier setting. Our findings highlight the need to consider a simpler integrated approach with medication dispensation at the same facility in low-threshold settings.

  7. Vicknasingam B, Mohd Salleh NA, Chooi WT, Singh D, Mohd Zaharim N, Kamarulzaman A, et al.
    Front Psychiatry, 2021;12:630730.
    PMID: 33854449 DOI: 10.3389/fpsyt.2021.630730
    Background: Restrictive orders and temporary programmatic or ad hoc changes within healthcare and other supportive systems that were implemented in response to the COVID-19 epidemic in Malaysia may have created hindrances to accessing healthcare and/or receiving other supportive services for people who use drugs (PWUDs). Design: A primarily qualitative study has been conducted to evaluate how service providers and recipients were adapting and coping during the initial periods of the COVID-19 response. Settings: The study engaged several healthcare and non-governmental organizations (NGOs) in the peninsular states of Penang, Kelantan, Selangor, and Melaka. Participants: Medical personnel of methadone maintenance treatment (MMT) programs (n = 2) and HIV clinics (n = 3), staff of NGO services (n = 4), and MMT patients (n = 9) were interviewed using a semi-structured format. Results: Interviewed participants reported significant organizational, programmatic, and treatment protocols related changes implemented within the healthcare and support services in addition to nationally imposed Movement Control Orders (MCOs). Changes aimed to reduce patient flow and concentration at the on-site services locations, including less frequent in-person visits, increased use of telemedicine resources, and greater reliance on telecommunication methods to maintain contacts with patients and clients; changes in medication dispensing protocols, including increased take-home doses and relaxed rules for obtaining them, or delivery of medications to patients' homes or locations near their homes were reported by the majority of study participants. No significant rates of COVID-19 infections among PWUDs, including among those with HIV have been reported at the study sites. Conclusions: Although the reported changes presented new challenges for both services providers and recipients and resulted in some degree of initial disruption, generally, all participants reported successful implementation and high levels of compliance with the newly introduced restrictions, regulations, and protocols, resulting in relatively low rates of treatment disruption or discontinuation at the study sites.
  8. Mohd Salleh NA, Voon P, Karamouzian M, Milloy MJ, Richardson L
    Drug Alcohol Depend, 2021 01 01;218:108342.
    PMID: 33097340 DOI: 10.1016/j.drugalcdep.2020.108342
    BACKGROUND: The beneficial links between engagement in methadone maintenance therapy (MMT) and HIV treatment outcomes have been extensively described. Nevertheless, people who use drugs (PWUD) continue to experience suboptimal HIV treatment outcomes. In this systematic review, we sought to identify components of MMT service provision that are associated with improvements in HIV care outcomes across the HIV care cascade.

    METHODS: We searched for peer-reviewed studies in online databases. To be eligible for inclusion in this review, studies must have involved a population or sub-population of PWUD engaged in MMT; report improved uptake of HIV testing, exposure to ART, or HIV-1 RNA plasma viral load suppression; provide details on MMT services; and be published in English between 1 January 2006 until 31 December 2018.

    RESULTS: Out of the 5594 identified records, 22 studies were eligible for this systematic review. Components of MMT services associated with HIV care cascade outcomes described in the studies were classified in three categories of care models: 1) standard MMT care with adequate doses, 2) standard MMT care and alongside additional medical component(s), and 3) standard MMT care, additional medical component(s) as well as informational or instrumental social support.

    CONCLUSION: The few studies identified reflect a scarcity of evidence on the role of social support to increase the benefits of MMT for PWUD who are living with HIV. Further research is needed to assess the role of medical and social service components in MMT care delivery in advancing PWUD along the HIV care cascade.

  9. Mohd Salleh NA, Van Draanen J, Nosova E, Barrios R, Milloy MJ, Richardson L
    AIDS, 2020 06 01;34(7):1037-1045.
    PMID: 32073444 DOI: 10.1097/QAD.0000000000002501
    OBJECTIVE: To examine the relationship between poverty, operationalized using a novel material security measure, and adherence to antiretroviral therapy (ART) among people who use illicit drugs (PWUD) in a context of universal access to HIV care.

    DESIGN: We analyzed data from a community-recruited prospective cohort in Vancouver, Canada (n = 623), from 2014 to 2017.

    METHODS: We used multivariable generalized mixed-effects analyses to estimate longitudinal factors associated with mean material security score. We then estimated the association between achieving at least 95% adherence to ART and overall mean material score, as well as mean score for three factors derived from a factor analysis. The three-factor structure, employed in the current analyses, were factor 1 (basic needs); factor 2 (housing-related variables) and factor 3 (economic resources).

    RESULTS: Recent incarceration [β-coefficient (β) = -0.176, 95% confidence interval (95% CI): -0.288 to -0.063], unmet health needs [β = -0.110, 95% CI: -0.178 to -0.042), unmet social service needs (β = -0.264, 95% CI: -0.336 to -0.193) and having access to social services (β= -0.102, 95% CI: -0.1586 to -0.0465) were among the factors associated with lower material security scores. Contrary to expectations that low levels of material security in this population would lead to poor ART adherence, we did not observe a significant relationship between adherence and overall material security score, or for each factor individually.

    CONCLUSION: Our findings highlight the potentially important role of no-cost, universal access to HIV prevention and treatment, in mitigating the impact of socioeconomic disadvantage on ART adherence.

  10. Vicknasingam B, Mohd Salleh NA, Ramadah R, Singh D, Kamarulzaman A, Chawarski MC
    Int J Drug Policy, 2021 11;97:103311.
    PMID: 34111680 DOI: 10.1016/j.drugpo.2021.103311
  11. Mohd Salleh NA, Richardson L, Kerr T, Shoveller J, Montaner J, Kamarulzaman A, et al.
    J Addict Med, 2018 3 10;12(4):308-314.
    PMID: 29521670 DOI: 10.1097/ADM.0000000000000403
    OBJECTIVES: Among people living with HIV (PLWH), high levels of adherence to prescribed antiretroviral therapy (ART) is required to achieve optimal treatment outcomes. However, little is known about the effects of daily pill burden on adherence amongst PLWH who use drugs. We sought to investigate the association between daily pill burden and adherence to ART among members of this key population in Vancouver, Canada.

    METHODS: We used data from the AIDS Care Cohort to Evaluate Exposure to Survival Services study, a long-running community-recruited cohort of PLWH who use illicit drugs linked to comprehensive HIV clinical records. The longitudinal relationship between daily pill burden and the odds of ≥95% adherence to ART among ART-exposed individuals was analyzed using multivariable generalized linear mixed-effects modeling, adjusting for sociodemographic, behavioural, and structural factors linked to adherence.

    RESULTS: Between December 2005 and May 2014, the study enrolled 770 ART-exposed participants, including 257 (34%) women, with a median age of 43 years. At baseline, 437 (56.7%) participants achieved ≥95% adherence in the previous 180 days. Among all interview periods, the median adherence was 100% (interquartile range 71%-100%). In a multivariable model, a greater number of pills per day was negatively associated with ≥95% adherence (adjusted odds ratio [AOR] 0.87 per pill, 95% confidence interval [CI] 0.84-0.91). Further analysis showed that once-a-day ART regimens were positively associated with optimal adherence (AOR 1.39, 95% CI 1.07-1.80).

    CONCLUSIONS: In conclusion, simpler dosing demands (ie, fewer pills and once-a-day single tablet regimens) promoted optimal adherence among PLWH who use drugs. Our findings highlight the need for simpler dosing to be encouraged explicitly for PWUD with multiple adherence barriers.

  12. Mitra S, Grant C, Nolan S, Mohd Salleh NA, Milloy MJ, Richardson L
    AIDS Behav, 2022 Jun;26(6):1933-1942.
    PMID: 34977956 DOI: 10.1007/s10461-021-03543-y
    A robust evidence-base describes the beneficial association between opioid agonist therapy (OAT) and HIV-related outcomes among people living with HIV and opioid use disorder. While some evidence suggests the stabilizing effect of OAT on antiretroviral therapy (ART) treatment engagement, less is understood about the potential for an inverse relationship. We sought to examine the relationship between transitions in ART engagement and transitions onto OAT. We used data from a prospective cohort of people living with HIV who use drugs in Vancouver, Canada-a setting with no-cost access to ART and low or no-cost access to OAT among low-income residents. Restricting the sample to those who reported daily or greater opioid use, we used generalized linear mixed-effects models to estimate the relationships between our primary outcome of transitions onto OAT (methadone or buprenorphine/naloxone) and transitions (1) onto ART and (2) into ART adherence. Subsequent analyses assessed the temporal sequencing of transitions. Between 2005 and 2017, among 433 participants, 48.3% reported transitioning onto OAT at least once. In concurrent analyses, transitions onto ART were positively and significantly associated with transitions onto OAT. Temporal sequencing revealed that transitions into OAT were also positively and significantly associated with subsequent transitions onto ART. OAT's potential to facilitate the uptake of ART points to the continued need to scale-up low-threshold, client-centered substance use services integrated alongside HIV care.
  13. Ahmad A, Bromberg DJ, Shrestha R, Salleh NM, Bazazi AR, Kamarulzaman A, et al.
    Int J Drug Policy, 2024 Apr;126:104369.
    PMID: 38484531 DOI: 10.1016/j.drugpo.2024.104369
    BACKGROUND: Incarcerated people with HIV and opioid-dependence often experience poor post-release outcomes in the absence of methadone maintenance treatment (MMT). In a prospective trial, we assessed the impact of methadone dose achieved within prison on linkage to MMT after release.

    METHODS: From 2010 to 2014, men with HIV (N = 212) and opioid dependence before incarceration were enrolled in MMT within 6 months of release from Malaysia's largest prison and followed for 12-months post-release. As a prospective trial, allocation to MMT was at random and later by preference design (predictive nonetheless). MMT dosing was individually targeted to minimally achieve 80 mg/day. Time-to-event analyses were conducted to model linkage to MMT after release.

    FINDINGS: Of the 212 participants allocated to MMT, 98 (46 %) were prescribed higher dosages (≥80 mg/day) before release. Linkage to MMT after release occurred in 77 (36 %) participants and significantly higher for those prescribed higher dosages (46% vs 28 %; p = 0.011). Factors associated with higher MMT dosages were being married, on antiretroviral therapy, longer incarceration periods, having higher levels of depression, and methadone preference compared to randomization. After controlling for other variables, being prescribed higher methadone dosage (aHR: 2.53, 95 %CI: 1.42-4.49) was the only independent predictor of linkage to methadone after release.

    INTERPRETATION: Higher doses of methadone prescribed before release increased the likelihood of linkage to MMT after release. Methadone dosing should be introduced into international guidelines for treatment of opioid use disorder in prisons and further post-release benefits should be explored.

    FUNDING: National Institute of Drug Abuse (NIDA).

  14. Ng FL, Jaafar MM, Phang SM, Chan Z, Salleh NA, Azmi SZ, et al.
    Sci Rep, 2014;4:7562.
    PMID: 25531093 DOI: 10.1038/srep07562
    The search for renewable energy sources has become challenging in the current era, as conventional fuel sources are of finite origins. Recent research interest has focused on various biophotovoltaic (BPV) platforms utilizing algae, which are then used to harvest solar energy and generate electrical power. The majority of BPV platforms incorporate indium tin oxide (ITO) anodes for the purpose of charge transfer due to its inherent optical and electrical properties. However, other materials such as reduced graphene oxide (RGO) could provide higher efficiency due to their intrinsic electrical properties and biological compatibility. In this work, the performance of algae biofilms grown on RGO and ITO anodes were measured and discussed. Results indicate improved peak power of 0.1481 mWm(-2) using the RGO electrode and an increase in efficiency of 119%, illustrating the potential of RGO as an anode material for applications in biofilm derived devices and systems.
  15. Khoo CH, Cheah YK, Lee LH, Sim JH, Salleh NA, Sidik SM, et al.
    Antonie Van Leeuwenhoek, 2009 Nov;96(4):441-57.
    PMID: 19565351 DOI: 10.1007/s10482-009-9358-z
    The increased occurrence of Salmonella occurrence in local indigenous vegetables and poultry meat can be a potential health hazards. This study is aimed to detect the prevalence of twenty different virulence factors among Salmonella enterica strains isolated from poultry and local indigenous vegetables in Malaysia via an optimized, rapid and specific multiplex PCR assay. The assay encompasses a total of 19 Salmonella pathogenicity islands genes and a quorum sensing gene (sdiA) in three multiplex reaction sets. A total of 114 Salmonella enterica isolates belonging to 38 different serovars were tested. Each isolate in under this study was found to possess up to 70% of the virulence genes tested and exhibited variable pathogenicity gene patterns. Reproducibility of the multiplex PCR assay was found to be 100% and the detection limit of the optimized multiplex PCR was tested with lowest detectable concentration of DNA 0.8 pg microl(-1). This study demonstrated various Salmonella pathogenicity island virulence gene patterns even within the same serovar. This sets of multiplex PCR system provide a fast and reliable typing approach based on Salmonella pathogenicity islands, thus enabling an effective monitoring of emerging pathogenic Salmonella strains as an additional tool in Salmonella surveillance studies.
  16. Salleh NA, Rosli FN, Akbar MA, Yusof A, Sahrani FK, Razak SA, et al.
    Mar Pollut Bull, 2021 Nov;172:112850.
    PMID: 34391012 DOI: 10.1016/j.marpolbul.2021.112850
    This study investigates bacterial diversity and potential pathogens in the international ships' ballast water at Tanjung Pelepas Port, Malaysia, using 16S rRNA amplicon sequencing. Thirty-four bacterial phylum, 305 families, 577 genera, and 941 species were detected in eight ballast water samples of different origins. The similarity of the bacterial composition between samples was found to be random and not tied to geographical locations. The bacterial abundance did not seem to be affected by related physicochemical except for temperature. Ballast water samples with a temperature lower than 25 °C showed a relatively lower bacterial abundance. A total of 33 potential pathogens were detected from all ballast water samples. Pseudomonas spp., Tenacibaculum spp., Flavobacteriaceae spp., Halomonas spp., and Acinetobacter junii are the potential pathogens with more than 10% OTU prevalence. This study would provide beneficial information for further enhancing ballast water microorganism guidelines in Malaysia.
  17. Fazliana M, Liyana AZ, Omar A, Ambak R, Mohamad Nor NS, Shamsudin UK, et al.
    BMC Womens Health, 2018 07 19;18(Suppl 1):93.
    PMID: 30066641 DOI: 10.1186/s12905-018-0592-2
    BACKGROUND: Obesity is related to the increased incidence of hypertension and in healthy individuals, blood pressure changes with age and body mass. The aims of this paper were to evaluate the effectiveness of the weight loss intervention on body composition and blood pressure, and to evaluate the relationship between these factors among housewives in the MyBFF@home study.

    METHODS: MyBFF@home intervention was a quasi-experimental study which involved 328 overweight and obese housewives aged 18-59 years old (Control group: 159, Intervention group: 169). Data of the control and intervention group (pre and post intervention who completed the body composition and blood pressure measurements were analysed. Body compositions were measured using the Body Impedance Analyser (InBody 720) and blood pressure (Systolic and Diastolic) was taken using the blood pressure monitoring device (Omron HEM 907) at baseline, 6 month and 12 month. Data analyses (Pearson's correlation test and ANOVA) were performed and analysed using SPSS Statistics for Windows, version 22.0.

    RESULTS: Visceral fat area, fat mass and body fat percentage, were all significantly decreased in the intervention group compared to the control group after 6 month intervention (p 

  18. Chan HK, Sem X, Ivanova Reipold E, Pannir Selvam SBA, Salleh NA, Mohamad Gani AHB, et al.
    PLOS Glob Public Health, 2024;4(1):e0001770.
    PMID: 38170720 DOI: 10.1371/journal.pgph.0001770
    Hepatitis C self-testing (HCVST) is emerging as an additional strategy that could help to expand access to HCV testing. We conducted a study to assess the usability and acceptability of two types of HCVST, oral fluid- and blood-based, among the general population and men who have sex with men (MSM) in Malaysia. An observational study was conducted in three primary care centres in Malaysia. Participants who were layman users performed the oral fluid- and blood-based HCVST sequentially. Usability was assessed by calculating the rate of errors observed, the rate of difficulties faced by participants as well as inter-reader (self-test interpreted by self-tester vs interpreted by trained user) and inter-operator concordances (self-test vs test performed by trained user). The acceptability of HCV self-testing was assessed using an interviewer-administered semi-structured questionnaire. Participants were also required to read contrived test results which included "positive", "negative", and "invalid". There was a total of 200 participants (100 general population, 100 MSM; mean age 33.6 ± 14.0 years). We found a high acceptability of oral fluid- and blood-based HCVST across both general population and MSM. User errors, related to timekeeping and reading within stipulated time, were common. However, the majority of the participants were still able to obtain and interpret results correctly, including that of contrived results, although there was substantial difficulty interpreting weak positive results. The high acceptability of HCVST among the participants did not appreciably change after they had experienced both tests, with 97.0% of all participants indicating they would be willing to use HCVST again and 98.5% of them indicating they would recommend it to people they knew. There was no significant difference between the general population and MSM in these aspects. Our study demonstrates that both oral fluid- and blood-based HCVST are highly acceptable among both the general population and MSM. Both populations also showed comparable ability to conduct the tests and interpret the results. Overall, this study suggests that HCVST could be introduced as an addition to existing HCV testing services in Malaysia. Further studies are needed to establish the optimal positioning of self-testing alongside facility-based testing to expand access to HCV diagnosis in the country.
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