Papers by MOHAMMED IMAD MUSTAFA
International Journal of Infectious Diseases, 2008
Tropical biomedicine, 2011
Community-acquired pneumonia (CAP) is still a major cause of morbidity and mortality especially t... more Community-acquired pneumonia (CAP) is still a major cause of morbidity and mortality especially to children and compromised hosts, such as the old and those with underlying chronic diseases. Knowledge of pathogens causing CAP constitutes the basis for selection of antimicrobial treatment. Previous data have shown that etiological agents can be identified in only up to 50% of patients, but this figure can be improved by using polymerase chain reaction (PCR). This study was designed to evaluate multiplex real-time PCR as a method for rapid differential detection of five bacterial causes of CAP (Streptococcus pneumoniae, Burkholderia pseudomallei and atypical bacterial pathogens namely Mycoplasma pneumoniae, Chlamydophila pneumoniae and Legionella pneumophila) in CAP patients attending Hospital Tengku Ampuan Afzan (HTAA)/ Kuantan, Pahang, Malaysia. Two previously developed multiplex real-time PCR assays, duplex for the differential detection of S. pneumoniae and B. pseudomallei and tri...
John Wiley & Sons Ltd, 2015
IIUM Medical Journal Malaysia, 2020
Introduction: Exact causal mechanism of schizophrenia is still unknown; however, genetic and envi... more Introduction: Exact causal mechanism of schizophrenia is still unknown; however, genetic and environmental factors are implicated in disease aetiology. The aim of the study is to determine the association of infectious agents cytomegalovirus and T.gondii along with immune cytokines IL-2, IL-6 and IFN-γ with schizophrenia. Methods: Ninety subjects participated in the study, 45 were patients diagnosed with schizophrenia, and the other 45 were a healthy control group. Qualitative and quantitative enzyme immunoassays were used for detection of antibodies and quantitation of cytokines respectively in subjects’ sera. Results: Both patients and control groups had similar CMV seroprevalence of 93.3% (42/45). Prevalence of anti T. gondii IgG antibodies were 53.3% and 64.4% among schizophrenic patients and controls respectively. No statistically significant difference was observed between patients and controls (p > 0.05). A significant difference (p<0.005) between mean serum Interleukin...
Journal of Pharmacy And Bioallied Sciences, 2019
Breast cancer is one of the commonest cancers in Malaysian females. Searching for a molecular lin... more Breast cancer is one of the commonest cancers in Malaysian females. Searching for a molecular link between breast cancer, early onset gene 1 (BRCA1) mutations and the development of early onset breast cancer has been of major interest over the past two decades. BRCA1 gene is located on chromosome 17 and known as a tumour suppressor gene maintaining genomic integrity to prevent uncontrolled proliferation of cells. Previous studies have found several translation termination mutations that led to the formation of truncated protein. The aim of this study was to investigate the presence of detectable germ-line translation termination mutations within nucleotide 790 until 1950 of the coding region of BRCA1 gene. Subsequently we aim to contribute any detected mutations to the Breast Cancer Information Core (BIC). Information regarding age and family history of breast or ovarian cancer were obtained from each patient and control. DNA extracted from the blood samples was screened for the pre...
International Journal of Infectious Diseases, 2012
IIUM Medical Journal Malaysia, 2016
Introduction: Hepatitis C virus (HCV) has been classified into seven genotypes with more than 80 ... more Introduction: Hepatitis C virus (HCV) has been classified into seven genotypes with more than 80 subtypes isolated worldwide. HCV genotypes are an important parameter in determining the right antiviral dosage, duration and monitoring the response of that treatment. The main aim of this study was to determine the distribution of HCV genotypes, their association with demographic variables and to investigate the presence of uncommon mixed-genotype infection case. Methods: This cross sectional study was performed in Hospital Tengku Ampuan Afzan, Kuantan, Pahang from January to July 2014. The sera samples from 40 HCV seropositive patients were analyzed using reversetranscription PCR (RT-PCR) and direct DNA sequencing assays. Results: More than half of study patients were from male patients (32/40; 80%), below the age of 45 (27/40; 67.5%) and Malays (34/40; 77.5%). Thirty one out 40 (77.5%) samples were successfully sequenced for genotyping with genotype 3 (24/31; 77.4%) predominate the s...
The Malaysian journal of medical sciences : MJMS, 2016
To assess antimicrobial susceptibility of extended-spectrum β-lactamase- (ESBL-) producing Klebsi... more To assess antimicrobial susceptibility of extended-spectrum β-lactamase- (ESBL-) producing Klebsiella pneumoniae and Escherichia coli isolates from Hospital Tengku Ampuan Afzan (HTAA), as well as to identify ESBL genes. Non-duplicate K. pneumoniae and E. coli isolates were recovered from various clinical samples. Isolates were screened for antimicrobial resistance by disc diffusion method. Isolates resistant to oxyimino-cephalosporins were subjected to phenotypic ESBL production. Detection of resistance genes was then performed using primers specific for ESBL genes (bla CTX-M, bla SHV and bla TEM). Piperacillin/tazobactam and carbapenems remained the active β-lactam antibiotic against K. pneumoniae and E. coli. ESBLs were detected among 35.5% (39/110) of K. pneumoniae and 18.8% (28/149) of E. coli isolates. CTX-M β-lactamase was detected in 90% of all ESBL-positive isolates, whereas bla SHV and bla TEM genes were found among 56% and 52% of them, respectively. Twenty-eight percent (2...
International journal of health sciences, 2022
Introduction: Virgin coconut oil (VCO) is an edible oil extracted from the meat of mature coconut... more Introduction: Virgin coconut oil (VCO) is an edible oil extracted from the meat of mature coconuts. It is also known for its health and therapeutic benefits, mainly attributed to its polyphenols and medium-chain fatty acid contents The immunomodulatory effects of VCO have not been extensively investigated. The aim of the present study was to investigate the effects of VCO on cyclophosphamide (CY)-induced immunotoxicity of peripheral lymphoid tissues. Methods: Forty Wistar rats were divided into five groups of eight rats each. Group 1 served as the normal control, while the other groups were all given 10 mg/kg of CY orally once daily for 4 weeks. Group 2 received CY served as the negative control. Group 3 rats were treated with levamisole (LMS) for 6 weeks, while Groups 4A and 4B were given VCO at 10 mL/kg and 15 mL/kg, respectively, for 6 weeks. The spleen and ileum sections were subjected to routine histological examination and immunohistochemical evaluation for T and B lymphocytes...
IIUM Medical Journal Malaysia
Introduction: HCV infection is frequent in patients undergoing maintenance haemodialysis, with pr... more Introduction: HCV infection is frequent in patients undergoing maintenance haemodialysis, with prevalence between 8 and 10%. Hepatitis C has an adverse effect on both patient and graft survival in those who get renal transplants. There are relatively scarce reports on the natural fluctuation in viral load level in patients on chronic haemodialysis. Materials and Methods: This is a longitudinal short-term three months study, where 27 chronic haemodialysis patients infected with known HCV genotypes were recruited from seven haemodialysis centres in Pahang. Serum samples were collected monthly, both pre- and post-haemodialysis sessions, over a period of three months. Viral RNA was extracted from serum using QIAamp Viral RNA Extraction kit (Qiagen). The HCV viral load was measured using one-step reverse transcriptase qPCR (Applied Biosystems) targeting the 5`HCV non-coding region (5’UTR). The serum α-IFN level was measured using commercial ELISA kit (Amersham, UK). Six biochemical liver...
International Journal of Human and Health Sciences (IJHHS)
Introduction: Meliodosis is an important public health disease caused byBurkholderiapseudomallei.... more Introduction: Meliodosis is an important public health disease caused byBurkholderiapseudomallei. Early laboratory diagnosis is crucial for appropriate treatment due to its high mortality rate.Objective: This study is conducted to assess the potential role of the in-house IFAT IgM and IgG as the serodiagnostic tool in melioidosis and to determine the cut-off levels.Method: 40 culture-confirmed melioidosis patients were recruited. Controls consisted of a group of 40 patients without active infection and another group of 40 patients with positive blood culture for organisms other thanBurkholderiapseudomallei.Results and Discussion: Using the receiver operating characteristic (ROC) curve, the best cut-off levels determined to diagnose melioidosis are 1:20 for IgM and 1:80 for IgG. Of these cut off levels, the sensitivity and specificity for IgM are 72.5% and 80% respectively and 65% and 87.5%respectively for IgG which also has high background seropositivity.Conclusion: IFAT IgM at the ...
Bangladesh Journal of Infectious Diseases
Background: There are several serological tests used in the diagnosis of melioidosis. However, th... more Background: There are several serological tests used in the diagnosis of melioidosis. However, the interpretation of the results can be problematic in endemic areas because there might be a high background positivity due to previous exposure. Objective: This study aimed to determine the usefulness of Indirect Immunofluorescent Antibody (IFA) IgM and IgG in the diagnosis of melioidosis and the time for seroconversion. Methodology: We prospectively studied the trend of IFA IgM and IgG in 40 patients with culture-confirmed melioidosis over three months at six different time points (days 1, 8, 15, 30, 60, and 90). Results: From the results, 37.5% and 32.5% of patients had IFA IgM and IgG of ≤ 1:20 respectively on day 1 when the blood culture was positive. The natural log (ln) of the titres was used for the analysis. Repeated measures ANOVA showed significant changes in both IgM (p= 0.001) and IgG (p= 0.045) respectively throughout six sampling time points. Both the means of ln IgM and l...
International Medical Journal Malaysia, 2012
Introduction: HCV infection is frequent in patients undergoing maintenance haemodialysis, with pr... more Introduction: HCV infection is frequent in patients undergoing maintenance haemodialysis, with prevalence between 8 and 10%. Hepatitis C has an adverse effect on both patient and graft survival in those who get renal transplants. There are relatively scarce reports on the natural fluctuation in viral load level in patients on chronic haemodialysis. Materials and Methods: This is a longitudinal short-term three months study, where 27 chronic haemodialysis patients infected with known HCV genotypes were recruited from seven haemodialysis centres in Pahang. Serum samples were collected monthly, both pre- and post-haemodialysis sessions, over a period of three months. Viral RNA was extracted from serum using QIAamp Viral RNA Extraction kit (Qiagen). The HCV viral load was measured using one-step reverse transcriptase qPCR (Applied Biosystems) targeting the 5`HCV non-coding region (5’UTR). The serum α-IFN level was measured using commercial ELISA kit (Amersham, UK). Six biochemical liver...
Introduction: Meliodosis is an important public health disease caused by Burkholderiapseudomallei... more Introduction: Meliodosis is an important public health disease caused by Burkholderiapseudomallei . Early laboratory diagnosis is crucial for appropriate treatment due to its high mortality rate. Objective: This study is conducted to assess the potential role of the in-house IFAT IgM and IgG as the serodiagnostic tool in melioidosis and to determine the cut-off levels. Method: 40 culture-confirmed melioidosis patients were recruited. Controls consisted of a group of 40 patients without active infection and another group of 40 patients with positive blood culture for organisms other than Burkholderiapseudomallei . Results and Discussion: Using the receiver operating characteristic (ROC) curve, the best cut-off levels determined to diagnose melioidosis are 1:20 for IgM and 1:80 for IgG. Of these cut off levels, the sensitivity and specificity for IgM are 72.5% and 80% respectively and 65% and 87.5%respectively for IgG which also has high background seropositivity. Conclusion: IFAT IgM...
IIUM Medical Journal Malaysia, 2021
Introduction: Co-resistance to quinolones among extended spectrum β[1]lactamase (ESBL)-producing... more Introduction: Co-resistance to quinolones among extended spectrum β[1]lactamase (ESBL)-producing E. coli commonly occurs in clinical settings. Quinolones act on DNA gyrase and DNA topoisomerase enzymes, which are coded by gyrA and parC genes, thus any mutation to the genes may affect the drug effectiveness. The objective of the study was to characterize gyrA and parC genes in quinolone-resistant E. coli isolates and correlated the mutations with their phenotypic resistance. Materials and Methods: Thirty-two quinolone-resistant (QR) and six quinolone-sensitive (QS) ESBL-E. coli isolates were identified by antibiotic susceptibility and minimum inhibitory concentration tests. Bioinformatics analysis were conducted to study any mutations occurred in the genes and generate their codon compositions. Results: All the QR ESBL-E. coli isolates were identified as multidrug-resistant bacteria. A single point mutation in the quinolone resistance-determining region (QRDR) of gyrA, at codon 83, ...
Background: There are several serological tests used in the diagnosis of melioidosis. However, th... more Background: There are several serological tests used in the diagnosis of melioidosis. However, the interpretation of the results can be problematic in endemic areas because there might be a high background positivity due to previous exposure. Objective: This study aimed to determine the usefulness of Indirect Immunofluorescent Antibody (IFA) IgM and IgG in the diagnosis of melioidosis and the time for seroconversion. Methodology: We prospectively studied the trend of IFA IgM and IgG in 40 patients with culture-confirmed melioidosis over three months at six different time points (days 1, 8, 15, 30, 60, and 90). Results: From the results, 37.5% and 32.5% of patients had IFA IgM and IgG of ≤ 1:20 respectively on day 1 when the blood culture was positive. The natural log (ln) of the titres was used for the analysis. Repeated measures ANOVA showed significant changes in both IgM (p= 0.001) and IgG (p= 0.045) respectively throughout six sampling time points. Both the means of ln IgM and l...
Introduction: Investigation of urine proteome in patients with acute melioidosis may reveal poten... more Introduction: Investigation of urine proteome in patients with acute melioidosis may reveal potential disease markers, from either bacterial or human proteins. We used an in-solution gel-free method instead of 2-DE to detect human and Burkholderia pseudomallei proteins in urine of patients with acute melioidosis. Here, we propose a simpler, economical method for preparing urine samples directly from melioidosis patients, for in-solution proteomic analysis using LCMS-QTOF MS/MS or MALDI-TOF MS/MS. Material and Methods: We adapted an acetone-TCA based protein precipitation method with LCMS-QTOF MS to detect the B. pseudomallei proteins directly from urine of acute melioidosis patients (culture positive and negative). This process involves protein precipitation, desalting, trypsin digestion, and optimization for the mass spectrometry. Results: A total of 3,866 human peptides were detected across 11 urine samples from clinically suspected acute melioidosis patients. Among them were thre...
Introduction: H. pylori BabA is an outer membrane protein that mediates bacterial adherence to th... more Introduction: H. pylori BabA is an outer membrane protein that mediates bacterial adherence to the gastric epithelium, triggers several pathways during the course of infection, and thus contributes to the disease development. Considering the variability in the presence of BabA coding gene (babA2) among H. pylori clinical strains, the aim of this study was to assess the relationship between the genotype status of H. pylori babA2 and the severity of clinical and histopathological outcomes. Methods: Gastric mucosal biopsy specimens were collected from 30 CLO test-positive patients, 16 with gastritis and 14 with peptic ulcer disease. Polymerase chain reaction was carried out to detect the presence of H. pylori-specific glmM gene and BabA coding gene (babA2). Histopathological examination was performed to evaluate the severity of H. pylori-associated gastric disease according to the Updated Sydney Classification System. Results: The glmM and babA2 genes were present in 100% and 86.7% of ...
Libyan International Medical University Journal
Background: Nosocomial infections caused by methicillin-resistant Staphylococci could lead to inc... more Background: Nosocomial infections caused by methicillin-resistant Staphylococci could lead to increased morbidity and mortality, but little is known about the prevalence of infections with these organisms in healthcare facilities and in the community in Tripoli. This study investigated the in vitro susceptibility of methicillin-resistant Staphylococcus aureus (MRSA) and methicillin-resistant coagulase negative staphylococci (MRCNS) to antimicrobial agents, and determined the molecular characteristics of MRSA. Methods: This is a retrospective observational study aiming at determining the prevalence and antibiotic resistance pattern of (MRSA) and (MRCNS) isolated from non-duplicated clinical specimens in Tripoli Central Hospital (TCH) between June 2013 and June 2014. Isolates were identified using standard laboratory procedures. Antimicrobial susceptibility tests were carried out by disk diffusion method and automated systems. DNA of the MRSA isolates was used for PCR to determine the...
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Papers by MOHAMMED IMAD MUSTAFA