Browse publications by year: 2024

  1. Tang G, Abu Bakar R, Omar S
    Front Psychol, 2024;15:1417260.
    PMID: 39205983 DOI: 10.3389/fpsyg.2024.1417260
    Adaptive performance will increasingly be confronted with new insights as society today changes constantly. This raises questions as to what factors will impact employee's adaptive performance and what is their inner psychological mechanism. The terms of positive psychology and adaptive performance are important concepts in the domain of organizational behavior and human resource development areas. The literature, however, lacks a systematic review of it. Our research seeks to explore the inherence of employee adaptive performance via the prism of positive psychology, including Psychological Capital and PERMA (Positive Emotions, Engagement, Relationships, Meaning and Accomplishment). We selected 27 papers out of 382, which were generated from Web of Science and Scopus databases associated the keywords of the two concepts, and used the 2020 PRISMA flow program for the paper screening. By analyzing the underpin theories, the causation, and the measurement, we discovered that there is a complex and nuanced relationship between positive psychology and adaptive performance, and most of the research to date suggests that positive psychology components improve employee adaptive performance. This study maps the current knowledge at the nexus of positive psychology and adaptive performance to identify existing gaps and potential for further investigation.
  2. Zhao L, Biswas S, Li Y, Sooranna SR
    Front Oncol, 2024;14:1429262.
    PMID: 39206156 DOI: 10.3389/fonc.2024.1429262
    Breast cancer (BC) is associated with malignant tumors in women worldwide with persistently high incidence and mortality rates. The traditional therapies including surgery, chemotherapy, radiotherapy and targeted therapy have certain therapeutic effects on BC patients, but acquired drug resistance can lead to tumor recurrence and metastasis. This remains a clinical challenge that is difficult to solve during treatment. Therefore, continued research is needed to identify effective targets and treatment methods, to ultimately implement personalized treatment strategies. Several studies have implicated that the long non-coding RNA LINC00511 is closely linked to the occurrence, development and drug resistance of BC. Here we will review the structure and the mechanisms of action of lnc RNA LINC00511 in various cancers, and then explore its expression and its related regulatory mechanisms during BC. In addition, we will discuss the biological functions and the potential clinical applications of LINC00511 in BC.
  3. Al-Haqan A, Waheedi S, Abdullah I, Meilianti S, Shaaban J
    Front Med (Lausanne), 2024;11:1442643.
    PMID: 39206168 DOI: 10.3389/fmed.2024.1442643
    BACKGROUND: Pharmacy education shifts toward competency-based training to meet healthcare demands. This study aims to develop and validate the Kuwait Advanced Competency Framework (KACF) for pharmacists. The study adopts the FIP Global Advanced Development Framework (GADF) to develop a country-specific framework, emphasizing the importance of aligning with global standards while adapting to local contexts. The developed framework builds upon the Kuwait Foundation Competency Framework to address the need for advanced pharmacy services.

    METHODS: This is a mixed methods study that employed an "adopt and adapt" approach. The KACF was adopted from the FIP GADF and adapted following four phases. Phase one involved checking and validating the Arabic version of the FIP GADF. Phase two employed a series of focus groups to validate accuracy and relevancy of competency statements. Phase three utilized a workshop with different stakeholders as a final step of validation. Phase four involved a national survey to assess the national pharmacy workforce against the framework competencies. Qualitative feedback from focus groups and workshops informed competencies modifications. Quantitative data were analyzed using descriptive and multiple correspondence analyses (MCA).

    RESULTS: The translation phase verified a bilingual framework that could be utilized by pharmacists in Kuwait. The initial and final validation phases identified 20 behavioral statements (out of 22 in the original document) that are relevant to pharmacy practice in Kuwait. The national survey, comprising 169 respondents, validated the KACF's applicability, revealing variations in career stage progression across competency clusters. Findings highlighted associations between career stages and practice settings, offering insights for tailored workforce development strategies.

    CONCLUSION: The KACF emerges as a pivotal tool for advancing pharmacy services in Kuwait, aligning with global trends toward competency-based education. Findings underscored the necessity for context-specific approaches in advancing pharmacy practice, providing a comprehensive understanding of competency progression and readiness for advanced roles.

  4. Yew Toong L, Ghauth S, Yin Xuan N
    OTO Open, 2024;8(3):e70001.
    PMID: 39206427 DOI: 10.1002/oto2.70001
    OBJECTIVE: The primary objective of this study is to review the clinical parameters associated with skull base osteomyelitis (SBO), with a secondary aim of studying their association with patient outcomes 1 and 6 months after treatment initiation.

    STUDY DESIGN: This is a single-center restrospective observational study.

    SETTING: The study was conducted from January 2018 to December 2022 at the University Malaya Medical Center in Kuala Lumpur.

    METHODS: Patients aged over 15 years with a diagnosis of SBO were included in the study. Clinical parameters, investigations, and follow-up records were recorded. The disease outcomes were analyzed at 1 and 6 months after treatment initiation using multivariable analyses.

    RESULTS: The study identified 31 patients with SBO, the majority of whom were elderly males with comorbidities such as diabetes and hypertension. Otalgia and otorrhea were the most common symptoms, and computed tomography scans were used for diagnosis. Pseudomonas aeruginosa was the most commonly identified pathogen, and intravenous broad-spectrum antimicrobials were used to treat all patients. Surgical intervention was required for 25% of patients, and underlying ischemic heart disease, anemia, and single nerve palsy were significantly associated with an unfavorable prognosis. Patients with higher body mass index and elevated C-reactive protein showed poorer outcomes after 1 and 6 months of treatment, respectively.

    CONCLUSION: Early recognition, prompt treatment, better control of comorbidities, nutrition, and monitoring can improve SBO outcomes and reduce complications. Therefore, as the prevalence of SBO increases, diagnostic criteria or management guidelines should be established to guide the best clinical practice.

  5. Shahalaei M, Azad AK, Sulaiman WMAW, Derakhshani A, Mofakham EB, Mallandrich M, et al.
    Front Chem, 2024;12:1398979.
    PMID: 39206442 DOI: 10.3389/fchem.2024.1398979
    Metallic nanoparticles (MNPs) have garnered significant attention due to their ability to improve the therapeutic index of medications by reducing multidrug resistance and effectively delivering therapeutic agents through active targeting. In addition to drug delivery, MNPs have several medical applications, including in vitro and in vivo diagnostics, and they improve the biocompatibility of materials and nutraceuticals. MNPs have several advantages in drug delivery systems and genetic manipulation, such as improved stability and half-life in circulation, passive or active targeting into the desired target selective tissue, and gene manipulation by delivering genetic materials. The main goal of this review is to provide current information on the present issues and prospects of MNPs in drug and gene delivery systems. The current study focused on MNP preparation methods and their characterization by different techniques, their applications to targeted delivery, non-viral vectors in genetic manipulation, and challenges in clinical trial translation.
  6. Matthews PJ, Hossain MA, Sookchaloem D, Nguyen VD, Wong SY, Joling J, et al.
    Ecol Evol, 2024 Aug;14(8):e70082.
    PMID: 39206463 DOI: 10.1002/ece3.70082
    Complete chloroplast genomes of 17 samples from six species of Colocasia (Araceae) were sequenced, assembled, and aligned together with two previously reported complete genome sequences from taro (Colocasia esculenta). Analysis provides a well-supported phylogenetic tree for taro and closely-related wild Colocasia species in Southeast Asia. Two chloroplast lineages (CI and CII) form a well-defined haplotype group and are found in cultivated taros known as var. esculenta (dasheen, CI), var. antiquorum (eddoe, CII), and in a widespread, commensal wild form known as var. aquatilis (CI). A third lineage (CIII) is also found in wild taros known as var. aquatilis and in the wild species C. lihengiae, C. formosana, and C. spongifolia. We suggest three different scenarios to explain the grouping of CIII wild taros (C. esculenta) with other wild Colocasia species. Chloroplast lineages CI and CIII in C. esculenta and an unknown parent species may be involved in an as yet undated history of hybridization, chloroplast capture, and range extension. Substantial taxonomic revision may be needed for C. esculenta after further studies of morphological and genetic diversity within the crop, in wild populations, and in closely related wild species. The results also point to the Bengal delta as a region of key interest for future research on the origins of tropical wetland taros.
  7. Tjong DH, Roesma DI, Aadrean, Agustina NT, Maharani S, Azzahra I
    Pak J Biol Sci, 2024 Jun;27(7):373-379.
    PMID: 39206471 DOI: 10.3923/pjbs.2024.373.379
    <b>Background and Objective:</b> The presence of Asian small-clawed otters (<i>Aonyx cinereus</i>) in West Sumatra has been reported from ecological data in the form of footprints and feces, while its genetic information has not been reported yet. This genetic information needs to be reported along with the determination of <i>A. cinereus</i> as a vulnerable species and is experiencing population decline by the International Union for Conservation of Nature (IUCN). This study aimed to determine the phylogenetic relationship of <i>A. cinereus</i> found in West Sumatra with other regions. <b>Materials and Methods:</b> The samples used were <i>A. cinereus</i> stool collected from several wetland locations in West Sumatra. <i>Aonyx cinereus</i> DNA was extracted from stool samples following the QIAamp Fast DNA Stool Mini Kit protocol (Qiagen). Amplification was performed using the CO1 gene. The IQTree was used to provide phylogenetic information on <i>A. cinereus</i> and MEGA 7 was used to determine the uncorrected genetic distance of <i>A. cinereus</i>. <b>Results:</b> <i>Aonyx cinereus</i> clustered to form three sub-clusters namely <i>A. cinereus</i> Sundaland, Laos lineage and unknown lineage. <i>Aonyx cinereus</i> Sundaland consists of <i>A. cinereus</i> West Sumatra and <i>A. cinereus</i> Sarawak, Malaysia which are closely related with a genetic distance of 0.68%. Moreover, compared to <i>A. cinereus</i> from unknown lineage (including Captive Copenhagen Zoo) and Laos lineage, <i>A. cinereus</i> of West Sumatra had a genetic distance of 0.68-1.20 and 4.18%, respectively. <b>Conclusion:</b> Wetland conversion and the role of humans have influenced the obstacle to connectivity among populations that cause genetic variation.
    MeSH terms: Animals; Feces/chemistry; Indonesia; Phylogeny*
  8. Jagota P, Phutrakool P, Kamble N, Dang THT, Aldaajani Z, Hatano T, et al.
    Mov Disord Clin Pract, 2024 Aug 29.
    PMID: 39206964 DOI: 10.1002/mdc3.14197
    BACKGROUND: Exercise has been demonstrated to result in improvements in physical function, cognition, and quality of life in People with Parkinson's (PwP) but its adoption is variable.

    OBJECTIVES: To investigate exercise preferences, levels, influencing factors among a diverse Parkinson's disease (PD) population, to understand exercise adoption patterns and plan informed interventions.

    METHODS: A cross-sectional survey collected data through online platforms and paper-based methods. The Exercise Index (ExI) calculated exercise level based on frequency and duration.

    RESULTS: Of 2976 PwP, 40.6% exercised regularly, 38.3% occasionally, and 21.2% did not exercise. The overall mean ExI was 18.99 ± 12.37. Factors associated with high exercise levels included exercising in groups (ExI 24-26), weightlifting (ExI 27 (highest)), using muscle-building equipment (ExI 25-26), and exercising at home following an app (ExI 26). A positive trend between ExI and varied exercise groups, locations, types, and equipment was observed. No expected benefit from exercise achieved the lowest ExI (8). Having at least two exercise-promoting factors, a bachelor's degree or higher, receiving exercise advice at initial visits, and aged ≤40 years at PD onset were strong predictors of exercise (adjust OR = 7.814; 6.981; 4.170; 3.565). Falls and "other" most troublesome PD symptoms were negative predictors (aOR = 0.359; 0.466). Barriers to exercise did not predict the odds of exercise.

    CONCLUSIONS: The study shows that PwP's exercise behavior is influenced by their exercise belief, age at PD onset, doctor's advice at initial visits, education level, symptoms, and exercise-promoting factors. High exercise levels were associated with certain types of exercises and exercising in groups.

  9. Tan GC, Wong YP
    Malays J Pathol, 2024 Aug;46(2):231-232.
    PMID: 39207000
    No abstract available.
    MeSH terms: Artificial Intelligence*; Pathology*
  10. Isah Tsamiya R, Mohd Nafi SN, Che Jalil NA, Mat Zin AA
    Malays J Pathol, 2024 Aug;46(2):233-246.
    PMID: 39207001
    INTRODUCTION: Young onset colorectal cancer (YOCRC) is a heterogenous CRC phenotype with an increasing trend globally. This study aims to determine FOXP3+ Treg cells, Mismatch Repair (MMR) proteins, and proto-oncogene B-Raf (BRAF) V600E status among YOCRC patients at Hospital Universiti Sains Malaysia.

    MATERIALS AND METHODS: This was a retrospective study of YOCRC (<50 years) over 8 years (January 2013 to December 2021). Immunohistochemistry staining of FOXP3, BRAFV600E, and MMR protein expression was performed using monoclonal antibodies. The staining intensity and percentage of positive cells were used to evaluate the staining using immunoreactive scoring. All data were analysed using descriptive and correlation statistics. A p-value of ≤ 0.05 was taken as statistically significant.

    RESULTS: A total of 65 YOCRC patients were diagnosed, out of which 53.8% had proficient MMR (pMMR) with a mean age of 41, while 46.2% had deficient MMR (dMMR) with a mean age of 35.5. The pMMR with the BRAFV600E+ group expressed higher FOXP3+Tregs (54.2%) than the dMMR with the BRAFV600E+ group (22.9%). Patients with lower FOXP3+Tregs were observed more in dMMR with BRAFV600E- (47%) than in pMMR with BRAFV600E- (5.9%). There was a statistically significant association between the density of expressed FOXP3+Tregs with MMR and BRAFV600E status (p=0.002).

    CONCLUSION: While most of the YOCRC had pMMR, others exhibited dMMR with loss of one or more MMR proteins. The presence of BRAFV600E demonstrated the YOCRC's sporadic nature. A high FOXP3+Treg expression was significantly associated with MMR and BRAFV600E status. Future research must be expanded to cover other hospitals to increase the sample size and include MLH1 hypermethylation testing.

    MeSH terms: Adult; Female; Humans; Immunohistochemistry; Male; Middle Aged; Mutation; Retrospective Studies; Biomarkers, Tumor/analysis; Biomarkers, Tumor/genetics; Biomarkers, Tumor/metabolism; Age of Onset; DNA Mismatch Repair*; Young Adult
  11. Raja Bongsu RH, Khalid K, Razali WAD, Zainal Abidin N, Saiful Nizam NAI, Rahidin NA, et al.
    Malays J Pathol, 2024 Aug;46(2):247-257.
    PMID: 39207002
    Congenital Adrenal Hyperplasia (CAH) is primarily caused by mutations in genes responsible to produce enzymes involved in the synthesis of cortisol, aldosterone, or both. This study aims to determine the prevalence, sociodemographic distributions, and clinical factors associated with CAH in the Malaysian population. This retrospective study reviewed laboratory records of 17-hydroxyprogesterone (17OHP) test requests received at the Institute for Medical Research, Kuala Lumpur from January 2021 to December 2021. Descriptive statistics were employed for most variables, and logistic regression analysis was conducted to determine factors associated with CAH. The dataset included a total of 775 patients (64.2%) from 1,207 test requests screened. The prevalence of newly diagnosed CAH in the year 2021 was 13.5% (n=105). The majority were Malays (15.1%), neonates (13.8%), and females (45.7%). Higher baseline 17-OHP (cOR:1.31, 95% CI:1.19, 1.45), unknown gender at birth (cOR:7.82, 95% CI:2.86, 21.37), and neonatal age group at presentation (cOR:29.3, 95% CI:12.07, 71.03) independently predict CAH. The high prevalence of CAH in our region has been speculated to be due to the cultural consanguinity norms, resulting in genetic aberrations. CAH may manifest as ambiguous genitalia, particularly in females, due to the overproduction of androgens in-utero, resulting in atypical genitalia, necessitating thorough investigation. To the best of our knowledge, the data presented are the latest report on CAH prevalence, distribution, and description of positive CAH cases in the Malaysian population. These findings are essential for further public health planning to improve the diagnostic capacity and clinical management of CAH.
    MeSH terms: Adolescent; Adult; Child; Child, Preschool; Female; Humans; Infant; Infant, Newborn; Malaysia/epidemiology; Male; Middle Aged; Retrospective Studies; Prevalence; 17-alpha-Hydroxyprogesterone/blood; Young Adult
  12. Aziz H, Ab Mutalib NS, Alias H, Jamal R
    Malays J Pathol, 2024 Aug;46(2):259-278.
    PMID: 39207003
    INTRODUCTION: Leukaemia is the most common cancer in children, however, there is still a big gap in knowledge about the genomic alterations in childhood acute myeloid leukaemia (AML) compared to adult AML. Relapsed AML remains as a leading cause of cancer deaths among children. This study aims to understand the molecular mechanisms of relapsed AML by elucidating the mutational landscape before and during relapse.

    MATERIALS AND METHODS: Whole genome sequencing was performed on matched samples collected at diagnosis, remission and relapse from three patients of de novo childhood AML. Sanger sequencing was performed for validation in 47 patients' samples, followed by functional analysis.

    RESULTS: Overall, we identified 312 somatic mutations including synonymous single nucleotide variants (SNVs), missense SNVs, deletions and insertion frameshifts, stopgains and splice sites. After prioritisation, only 46 variants were present at diagnosis (13-17 mutations per patient) and 49 variants at relapse (12-20 mutations per patient). Out of 81 variants, there were 35 new variants detected at relapse but not present at diagnosis. Six potential driver mutations (KIT, CDC73, HNF1A, RBM10, ZMYM4 and ETV6) were identified in predicting relapse for the 3 patients, with recurrent mutations of the ETV6 gene in 2 patients. Functional analysis of the ETV6 mutation showed that ETV6 lost its tumour suppressive function when both mutant ETV6 p.P25fs and ETV6 p.N75fs were tested in vitro.

    CONCLUSION: This study has uncovered the mutational landscape in three local childhood AML patients and contributes to a better understanding of the molecular mechanisms of relapsed AML.

    MeSH terms: Adolescent; Child; Child, Preschool; Female; Humans; Infant; Male; Mutation*; Neoplasm Recurrence, Local/genetics
  13. Chen Y, Chen K, Zhu W, Chen J, Huang Z
    Malays J Pathol, 2024 Aug;46(2):279-286.
    PMID: 39207004
    INTRODUCTION: Diabetic retinopathy is characterised by retinal vascular impairment. A number of aberrant microRNAs (miRNAs) have a role in the pathophysiology of vascular dysfunction. However, the relevance of miR-424 in retinal vascular endothelial cell dysfunction during hyperglycemia stress remains unknown. The purpose of this study is to investigate this issue.

    MATERIALS AND METHODS: Rhesus macaque choroid retinal endothelial cell line (RF/6A) cells were cultivated in normal glucose (NG) and high glucose (HG) conditions. The mRNA expression of miR-424 and Cyclin D1 (CCND1) was quantified using qPCR, and the protein quantity of CCND1 was detected using Western Blot. miR-424 mimics, miR-424 inhibitors, miR-424 inhibitor+ siRNA-CCND1 or vehicle molecules were transfected into RF/6A cells. MTT test was used to assess cell proliferation, and flow cytometric analysis was used to assess cell cycle. The interaction between miR-424 and CCND1 was predicted using bioinformatics and validated using dual luciferase reporter analysis.

    RESULTS: miR-424 was up-regulated, and cell viability was reduced in HG compared to NG. By reversing the expression of miR-424 in certain situations, the phenotypes can be changed. CCND1 has been identified as a miR-424 target gene, and it may be regulated at the transcriptional and translational levels. Manipulation of silencing CCND1 can counteract the effect of transfecting miR-424 inhibitor into RF/6A cells under HG such as proliferation stimulation.

    CONCLUSIONS: Our findings indicate that miR-424 plays an important role in hyperglycemia induced ARPE-19 cells damage, and it could be a new therapeutic target for DR by preventing retinal vascular cells from HG-induced injury.

    MeSH terms: Animals; Cell Line; Diabetic Retinopathy/metabolism; Macaca mulatta*; Retina/metabolism; Up-Regulation*; Cell Proliferation*
  14. Jamaludin MI, Hafiz WH, Shatnawi RS, Shafee MS, Mohd Nor F
    Malays J Pathol, 2024 Aug;46(2):287-293.
    PMID: 39207005
    INTRODUCTION: The prevalence of suicide presents a significant public health challenge globally, affecting diverse populations around the world. This study is motivated by the urgency to tackle suicide as a crucial public health issue on a global level, according to the United Nations Sustainable Development Goals and the General Programme of Work and Mental Health Action by the World Health Organization.

    MATERIALS AND METHODS: The research was performed at the Forensic Unit of Hospital Canselor Tuanku Muhriz, spanning a retrospective analysis covering 2012 to 2021. A descriptive analysis was conducted to analyse the patterns of suicide and the sociodemographic characteristics of the cases.

    RESULTS: The findings show monthly variations and a recent increase in suicide rates, especially during the pandemic of COVID-19. Analysis of suicide methods indicates that hanging is the most common suicide method, which accounts for almost half of the sample population, followed by jumping from a height and burning charcoal. Adult males are primarily implicated in suicidal acts, and the study reveals unique trends among different age groups, genders and employment statuses.

    CONCLUSION: This study aims to offer thorough insights and comprehension into suicide within the Malaysian sociodemographic framework. Consequently, it could furnish valuable insights for public health authorities and governmental bodies.

    MeSH terms: Adolescent; Adult; Aged; Female; Humans; Malaysia/epidemiology; Male; Middle Aged; Retrospective Studies; Young Adult
  15. Wang X, Yap SF, Ngeow YF
    Malays J Pathol, 2024 Aug;46(2):295-298.
    PMID: 39207006
    INTRODUCTION: Candida albicans and Streptococcus mutans co-exist in biofilms in the oral cavity. In this study, the impact of S. mutans on the growth of C. albicans within a mixed-species biofilm was examined.

    MATERIALS AND METHODS: Single species C. albicans biofilms and mixed species biofilms containing C. albicans and S. mutans at 1:3 and 1:10 ratios were constructed in 6-well microtiter plates. After 24 hours of incubation, the density of resuspended biofilm cells was determined as CFU/ml and used to compare the growth of C. albicans in single species and mixed species biofilms.

    RESULTS: The CFU/ml of C. albicans in mixed-species biofilms was found to be higher than that in single-species biofilms.

    CONCLUSION: S. mutans promotes the growth of C. albicans in a co-inhabited biofilm.

    MeSH terms: Humans; Mouth/microbiology; Oral Health
  16. Mohamed Yusoff PS, Arifin N, Periyasamy P, Tumian NR, Ismail F, Raja Sabudin RZA, et al.
    Malays J Pathol, 2024 Aug;46(2):299-306.
    PMID: 39207007
    Diagnosis of extraintestinal microsporidiosis is always hampered due to non-specific symptoms and difficulty in diagnosis. This study aimed to compare the diagnostic utility of blood and faecal-based polymerase chain reaction (PCR) to detect microsporidiosis in immunocompromised patients. A total of 42 immunocompromised patients consisting of HIV-infected and chemotherapy-treated patients were enrolled. Paired faecal and blood samples were collected and subjected to PCR to detect Enterocytozoon bieneusi and Encephalitozoon spp. Faecal samples were microscopically screened for microsporidia spores. Overall, 42.9% (18/42) of patients were positive for microsporidiosis. Of this, 19.0% (8/42) and 4.8% (2/42) were positive by blood and stool PCR respectively. Meanwhile, 33.3% (14/42) of the faecal specimens were microscopically positive. Among the positive patients, 22.2% (4/18) had microsporidia confirmed by blood PCR and stool microscopy, suggestive of dissemination. Interestingly, the stool specimen in which microsporidia spores were detected via microscopy is not positive via PCR method. This highlights the limitation of the faecal-based detection method and the important use of blood samples for diagnosing extraintestinal microsporidiosis. Only E. bieneusi species were detected in all PCR-positive samples. This study highlights the diagnostic value of blood PCR in diagnosing extraintestinal microsporidiosis infections.
    MeSH terms: Adult; Aged; Female; Humans; Male; Middle Aged; Microsporidia/isolation & purification; Encephalitozoon/isolation & purification; Immunocompromised Host; Enterocytozoon/isolation & purification
  17. Mokhtar NA, Ting SY, Zainol Abidin NZ, Abdul Hameed A, Mohamed Z, Mustapa NI, et al.
    Malays J Pathol, 2024 Aug;46(2):307-314.
    PMID: 39207008
    INTRODUCTION: Blood culture contamination remains a dilemma issue in the diagnosis of bloodstream infection. However, to date, there is no national data on blood culture contamination and the common organism isolated in Malaysia. This is a pioneer multi-centre study involving public hospitals with medical microbiologists in Malaysia to determine the blood culture contamination rate and the common organism isolated.

    MATERIALS AND METHODS: This retrospective cross-sectional study involved record review of all blood culture results over 9 months period from 1st January 2018 until 30th September 2018 in 27 government hospitals in Malaysia. For each positive culture result, the type of isolated organism was classified to represent true bacteraemia or contamination.

    RESULTS: We analysed 448,109 blood culture records from the participating hospitals. The blood culture positivity rate was 12.5% (57395 of 448109) and 25.0% (14367 of 57395) of the positive blood culture represents contamination. The national blood culture contamination rate in Malaysia was 3.2%. The contamination rate in the adult population was significantly higher than the paediatric population (3.6% vs. 2.6%; p<0.001). The blood contamination rate by institution ranged from 1.5% to 6.8%. The most frequently isolated microorganisms in the contaminated cultures were coagulase-negative staphylococci (71.0%).

    CONCLUSION: Blood culture contamination is a major issue that warrants priority in recognition, and interventions should be implemented to reduce the blood contamination rate in Malaysia.

    MeSH terms: Adult; Child; Cross-Sectional Studies; Female; Hospitals, Public*; Humans; Malaysia; Male; Middle Aged; Retrospective Studies; Blood Culture*
  18. Nahanthiran S, Nik Mustapha NH, Yasin N, Idris FB, Md Noor SB
    Malays J Pathol, 2024 Aug;46(2):315-320.
    PMID: 39207009
    INTRODUCTION: Thalassemia and haemoglobinopathies are relatively common among Malaysians. One of the rare haemoglobinopathies reported is Haemoglobin (Hb) Arya, which occurs due to substitution of aspartic acid at residue 47 of the alpha chain by asparagine. Here, we report the detection of Hb Arya in a Malaysian family, which was detected incidentally during family screening.

    CASE REPORT: A 16 years-old girl, clinically asymptomatic was noted to have low mean corpuscular haemoglobin (MCV) with normal Hb level. Hb analysis using capillary electrophoresis (CE) showed reduced Hb A of 76.5%, Hb A2 of 1.6% with presence of small peak at Zone 1 likely A2'. There was also a small peak noted at Hb D zone and Hb S zones which quantified as 1.5% and 20% respectively. Supplementary test by high performance liquid chromatography (HPLC) showed a prominent peak at D-window (19.6%) and a small peak at S-window (0.6%). DNA analysis revealed a heterozygous state of α2 codon 47 Hb Arya mutation. Subsequent family study showed a similar mutation in the father and sister of the index case.

    CONCLUSION: Very few reports are available up to date regarding Hb Arya. This report highlights the rare haemoglobinopathy in a Malay family in Malaysia that contributes to the growing literature of this rare haemoglobin variant.

    MeSH terms: Adolescent; Female; Humans; Malaysia; Male; Pedigree
  19. Vijian D, Wan Ab Rahman WS, Kannan TP, Zulkafli Z, Mohd Noor NH, Bahar R, et al.
    Malays J Pathol, 2024 Aug;46(2):321-324.
    PMID: 39207010
    INTRODUCTION: Haemoglobin (Hb) Quong Sze is a non-deletional α-thalassaemia subtype that occurs due to missense mutation at codon 125 of the HBA2 gene. Interaction between Hb QS with Southeast Asian double α-globin gene deletion results in non-deletional HbH disease, which is more severe than deletional HbH.

    CASE REPORT: A 3-month-old baby boy was presented with neonatal anaemia and mild hepatomegaly. Full blood count revealed severe hypochromic microcytic anaemia. There was an abundance of HbH inclusion bodies in his red blood cells. High-performance liquid chromatography showed a reduced HbA2 level with the presence of pre-run peak. Capillary electrophoresis showed the presence of HbH and Hb Barts. Molecular analysis found a common α0-thalassaemia (--SEA) in one allele and mutation in codon 125 in the other allele.

    DISCUSSION: Non-deletional HbH disease due to a combination of deletional and non-deletional mutations may present with severe clinical manifestations than those with deletion mutations, which warrants accurate diagnosis using molecular techniques.

    MeSH terms: Heterozygote; Humans; Infant; Malaysia; Male; Gene Deletion*
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