1.Antibiograms, Resistance Genes, Class I Integrons and PFGE profiles of Zoonotic Salmonella in Malaysia
Tropical Biomedicine 2015;32(4):573-586
Salmonella infections occur worldwide, in both developed and developing countries,
and a major contributor to morbidity and economic costs. A total of 32 Salmonella isolates
isolated from dogs (n=15/162), cats (n=1/126) and snakes (n=16/42) in the Klang valley,
Peninsular Malaysia during 2012-2013, were used in this study and 6 serovars were identified.
The isolates were then characterized for their susceptibility to commonly used antimicrobial
agents using the standard disk diffusion method. The presence of relevant resistance genes
and class 1 integrons were investigated by using PCR. Pulsed-field gel electrophoresis (PFGE)
was carried out to determine the genetic diversity of these Salmonella strains. Higher
resistance rates were observed for tetracycline (40.6%), nalidixic acid (21.9%),
sulphamethazole-trimethoprim (18.7%), ampicillin (18.7%) followed by chloramphenicol (15.6%),
streptomycin (6.25%), enrofloxacin (12.5%), cephalexin (6.25%), cephalothin (6.25%) and
amoxicillin-clavulanic acid (3.12%). Nine percent (3/32) presented a single type of resistance,
6% (2/32) showed resistance to two classes of antimicrobials and 34% (11/32) were multidrugresistant
(MDR) (resistant to 3 or more antimicrobials). Analysis of the carriage of resistance
genes in the isolates revealed that seven (blaTEM-1, strA, strB, sulII, dfrhI, tetA, and cmlA)
out of 10 resistance genes were present. Classes 1 integrons were present in 68.75% (11/16)
of the resistance strains. PFGE analysis showed that the strains were very diverse and
certain PFGE pattern clusters correlated well with antimicrobial resistance phenotypes. In
conclusion, high rates of multidrug resistance were found among the dogs Salmonella strains.
2.Mechanical And Surface Properties Of Initial And Working Aesthetic Orthodontic Archwires
Tang YC ; Peh XL ; Zakaria N N ; Radzi Z
Annals of Dentistry 2016;23(1):17-28
The study aimed to compare mechanical properties and surface characteristics of initial and workingaesthetic archwires with their conventional counterparts. High Aesthetic Sentalloy (full rhodium coatingnickel-titanium; Dentsply GAC) represented the initial aesthetic archwires; and FLI TRU-CHROME(labial PTFE-coated stainless steel; RMO) as the working aesthetic archwires; together with theirconventional counterparts were analysed. A three point bending test was conducted using a universaltesting machine (AGS-X SERIES, Shimadzu, Japan) to determine the load-deflection characteristics ofarchwires. Surface hardness was evaluated by Vickers microhardness test (HMV-FA, Shimadzu, Japan).A 3D Optical Surface Texture Analyzer (ALICONA, InfiniteFocus Real3D, Belgium) and a Field EmissionScanning Electron Microscope (FESEM, FEI Quanta 250, USA) were used for surface evaluation.Results showed that load-deflection characteristics of High Aesthetic Sentalloy archwires did not differfrom its control, whereas FLI TRU-CHROME archwires exhibited higher loading and unloading forcesthan its counterpart. No statistically significant difference in surface hardness was found between FLITRU-CHROME and its control archwires. The coating surfaces of both aesthetic archwires were rougherthan the non-coated conventional archwires, with similar roughness between non-coated surface of FLITRU-CHROME archwires and its counterpart. FLI TRU-CHROME archwires showed a distinct coatingthickness but coating layer is undefined in High Aesthetic Sentalloy archwires. In conclusion, the aestheticrhodium coated nickel titanium archwire has similar mechanical properties as control nickel titaniumarchwire without being adversely affected by the addition of the coating layer. The aesthetic coated PTFEstainless steel archwire has higher load response which could be an advantage as rigid wire in workingstage of orthodontic treatment. Based on their performance, their use could be recommended in caseswhere aesthetic aspect is crucial and where the friction aspect is not critical as their surface roughnessvalues increased.
3.Social support and self-care activities among the elderly patients with diabetes in Kelantan
Ahmad Sharoni SK ; Shdaifat EA ; Mohd Abd Majid HA ; Shohor NA ; Ahmad F ; Zakaria Z
Malaysian Family Physician 2015;10(1):34-43
Introduction: Diabetes is common among the elderly and can significantly affect their lives
including the issues related with social support and diabetic self-care activities.
Objectives: The objective of this study was to examine the social support and self-care activities
among the elderly patients with diabetes.
Methods: A survey involving 200 patients was conducted from March 2013 to May 2013 in
three hospitals in Kelantan. Data were obtained through self-administered questionnaires and
clinical characteristics were acquired from the patients’ records.
Results: The scores for social support (mean = 19.26; SD = 2.63) and self-care activities (mean
= 14.83; SD = 4.92) were moderate. Higher social support was associated with high levels of
glycated haemoglobin (HbA1c), fasting blood sugar (FBS) level, the duration of diabetes and
a decrease in body mass index (BMI) (p<0.05). It was observed that the patients with low
educational, Hb1Ac and FBS level, with other chronic diseases and who have had diabetes for
some time had low self-care activities (p<0.05). There was a significant negative relationship
between an increase in social support and decrease in self-care activity (p<0.05).
Conclusion: Healthcare providers, family and friends have to strengthen their relationship with
the elderly patients with diabetes to provide more social support and promote the compliance
with diabetic self-care activities to improve clinical outcomes.
4.Characterization of vancomycin-resistant Enterococcus isolates from broilers in Selangor, Malaysia.
Getachew YM ; Hassan L ; Zakaria Z ; Saleha AA ; Kamaruddin MI ; Che Zalina MZ
Tropical Biomedicine 2009;26(3):280-288
Vancomycin-resistant Enterococcus (VRE) is an emerging nosocomial pathogen in humans. The use of antibiotics in human therapy and in the production of food animals has been incriminated in the emergence of this organism. The present study describes the distribution of VRE species, the vancomycin-resistant genes detected, the vancomycin resistance pattern observed, and the genetic diversity of the isolates found in live broiler chickens in Malaysia. Overall 140 VRE were isolated with species comprising Enterococcus faecalis (48%), Enterococcus faecium (25.7%), Enterococcus gallinarum (12.1%), Enterococcus casseliflavus (1.4%) and other Enterococcus species (12.8%). Vancomycin resistance gene vanA and intrinsic genes vanC1 and vanC2/3 were detected in the study population. VanA was detected in 15 (63.9%) of E. faecium, 23 (22.4%) of E. faecalis and in 3 (17.6%) E. gallinarum isolates. E-test was conducted on randomly selected 41 of the isolates and the minimum inhibition concentration (MIC) of vancomycin for five (11.9%) of tested isolates is more than 256mug/ml. Genotypic analysis using random amplified polymorphic DNA (RAPD) showed genetic diversity within the Enterococcus species.
7.COVID-19 Pandemic: Two-year Experience and Response of a Teaching Hospital in Malaysia and the Effect on Postgraduate Orthopaedic Training
Kow RY ; Khalid KA ; Zakaria Z ; Awang MS
Malaysian Orthopaedic Journal 2022;16(No.2):1-14
As the number of COVID-19-related infections and deaths
increased exponentially in the during 2020, few countries
were equipped to manage and curb this novel coronavirus.
Initially there was no proven cure or vaccine to this novel
virus (SARS-Cov-2), leaving the authorities with no choice
but to impose quarantines at the short-term expense of their
economies. As we gain more knowledge on this novel virus,
the tried-and-tested method of selective testing of the
symptomatic patients, used successfully in almost all
infectious respiratory diseases, has been replaced with traceand-test method, as most of the infected patients remained
asymptomatic. In early 2021, the availability of vaccines
provided a shed of light out from this pandemic.
Nevertheless, we faced an enormous task in juggling
between vaccination of the population, managing patients
with COVID-19 infection as well as non-COVID-19
patients. Here, we share our experience and response in
managing this healthcare crisis across a two-year period
during the pandemic and we hope other centres can learn
from what we went through and help them derive a protocol
to navigate through a future pandemic.
9.Whole genome sequencing of Streptococcus suis revealed potential drug resistance and zoonotic transmission in companion cat
Lee, C.Y. ; Selvarajah, G.T. ; Zakaria, Z. ; Mustaffa-Kamal, F. ; Gan, H.M. ; Voon, K.G.L. ; Fong, M.W.C ; Ooi, P.T.
Tropical Biomedicine 2024;41(No.1):97-108
Streptococcus suis is a bacterium of clinical importance in diverse animal hosts including companion
animals and humans. Companion animals are closely associated in the living environment of humans
and are potential reservoirs for zoonotic pathogens. Given the zoonotic potential of S. suis, it is crucial
to determine whether this bacterium is present among the companion animal population. This study
aimed to detect Streptococcus suis in companion animals namely cats and dogs of the central west
coast of Peninsular Malaysia and further characterize the positive isolates via molecular and genomic
approach. The detection of S. suis was done via bacterial isolation and polymerase chain reaction assay
of gdh and recN gene from oral swabs. Characterization was done by multiplex PCR serotyping, as well
as muti-locus sequence typing, AMR gene prediction, MGE identification and phylogenomic analysis
on whole genome sequence acquired from Illumina and Oxford Nanopore sequencing. Among the 115
samples, PCR assay detected 2/59 of the cats were positive for S. suis serotype 8 while all screened
dog samples were negative. This study further described the first complete whole genome of S. suis
strain SS/UPM/MY/F001 isolated from the oral cavity of a companion cat. Genomic analysis revealed a
novel strain of S. suis having a unique MLST profile and antimicrobial resistance genes of mefA, msrD,
patA, patB and vanY. Mobile genetic elements were described, and pathogenic determinants matched
to human and swine strains were identified. Phylogenetic tree analysis on the core genome alignment
revealed strain SS/UPM/MY/F001 was distinct from other S. suis strains. This study provided insight
into the detection and genomic features of the S. suis isolate of a companion cat and highlighted its
potential for antimicrobial resistance and pathogenicity.