Displaying publications 1 - 20 of 44 in total

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  1. Fulltext Chronic osteomyelitis due to Burkholderia pseudomallei
    Kareem BA, Aiyar S, Marshal DS
    Med J Malaysia, 1995 Mar;50(1):116.
    PMID: 7752966
    Matched MeSH terms: Pseudomonas Infections*
  2. Fatality of a wild Bornean orangutan (Pongo pygmaeus morio): behavior and death of a wounded juvenile in Danum Valley, North Borneo
    Kanamori T, Kuze N, Bernard H, Malim TP, Kohshima S
    Primates, 2012 Jul;53(3):221-6.
    PMID: 22350273 DOI: 10.1007/s10329-012-0297-3
    Reports of wild great ape fatalities have been very limited, and only two have described wild orangutan deaths. We found a wounded juvenile female Bornean orangutan on 7 October 2006 in the Danum Valley, Sabah, Malaysia, and observed the individual's behavior for 7 days until her death on 13 October 2006. The 5-6-year-old orangutan, which we had observed since 2004, was wounded in the left brachium, back, and right hand. The individual's behavior changed after injury; the mean nest-nest active time became significantly shorter than before injury (from 12 h 3 min to 9 h 33 min), the mean waking time became significantly later (0552-0629 hours) and the mean bedtime became significantly earlier (from 1747 to 1603 hours). In the activity budget, resting increased significantly from 28.0 to 53.3%. Traveling and feeding decreased significantly from 23.5 to 12.7% and from 45.6 to 32.8%, respectively. The rate of brachiation during traveling and nest making decreased, whereas ground activity increased from 0 to 9%. We observed one vomiting incident and four occurrences of watery diarrhea during the 7 days before the individual died. The results of an autopsy performed by a local veterinarian suggested that the cause of death was septicemia because of Pseudomonas aeruginosa infection of the severely contaminated wounds. The morphology and distribution of the wounds suggested they had been incurred during an attack by a large animal with fangs and/or claws. This juvenile female became independent of its mother at ~4-5 years of age, slightly earlier than average. This individual might have been vulnerable to predatory attack because of her small body size (~5 kg at death) and lack of the mother's protection.
    Matched MeSH terms: Pseudomonas Infections/microbiology; Pseudomonas Infections/mortality; Pseudomonas Infections/veterinary*
  3. Fulltext Pseudomonas aeruginosa bacteremia secondary to acute right leg cellulitis: case of community-acquired infection
    Wahab AA, Rahman MM
    EXCLI J, 2013;12:997-1000.
    PMID: 27034639
    Pseudomonas aeruginosa is a gram-negative bacillus that causes wide spectrum clinical infections. However, it is most frequently associated with hospital-acquired infection. In this case a 58-year-old male with underlying hypertension and dyslipidaemia was admitted for acute right leg cellulitis. Pseudomonas aeruginosa was identified from the case, though it was not a usual suspected organism. It might be due to community-acquired infection.
    Matched MeSH terms: Pseudomonas Infections*
  4. A case of chronic melioidosis responding to tetracycline therapy
    Jegathesan M, Chye GH, Chik T, Singh RB
    Med J Malaya, 1972 Dec;27(2):150-2.
    PMID: 4268042
    Matched MeSH terms: Pseudomonas Infections/drug therapy
  5. An electrochemical sensor based on gold nanoparticles-functionalized reduced graphene oxide screen printed electrode for the detection of pyocyanin biomarker in Pseudomonas aeruginosa infection
    Rashid JIA, Kannan V, Ahmad MH, Mon AA, Taufik S, Miskon A, et al.
    Mater Sci Eng C Mater Biol Appl, 2021 Jan;120:111625.
    PMID: 33545813 DOI: 10.1016/j.msec.2020.111625
    Multidrug resistant Pseudomonas aeruginosa (P. aeruginosa) is known to be a problematic bacterium for being a major cause of opportunistic and nosocomial infections. In this study, reduced graphene oxide decorated with gold nanoparticles (AuNPs/rGO) was utilized as a new sensing material for a fast and direct electrochemical detection of pyocyanin as a biomarker of P. aeruginosa infections. Under optimal condition, the developed electrochemical pyocyanin sensor exhibited a good linear range for the determination of pyocyanin in phosphate-buffered saline (PBS), human saliva and urine at a clinically relevant concentration range of 1-100 μM, achieving a detection limit of 0.27 μM, 1.34 μM, and 2.3 μM, respectively. Our developed sensor demonstrated good selectivity towards pyocyanin in the presence of interfering molecule such as ascorbic acid, uric acid, NADH, glucose, and acetylsalicylic acid, which are commonly found in human fluids. Furthermore, the developed sensor was able to discriminate the signal with and without the presence of pyocyanin directly in P. aeruginosa culture. This proposed technique demonstrates its potential application in monitoring the presence of P. aeruginosa infection in patients.
    Matched MeSH terms: Pseudomonas Infections*
  6. Pseudomonas aeruginosa behaviour in polymicrobial communities: The competitive and cooperative interactions conducting to the exacerbation of infections
    Al-Wrafy FA, Alariqi R, Noman EA, Al-Gheethi AA, Mutahar M
    Microbiol Res, 2023 Mar;268:127298.
    PMID: 36610273 DOI: 10.1016/j.micres.2022.127298
    Pseudomonas aeruginosa is mostly associated with persistent infections and antibiotic resistance as a result of several factors, biofilms one of them. Microorganisms within the polymicrobial biofilm (PMB) reveal various transcriptional profiles and affect each other which might influence their pathogenicity and antibiotic tolerance and subsequent worsening of the biofilm infection. P. aeruginosa within PMB exhibits various behaviours toward other microorganisms, which may enhance or repress the virulence of these microbes. Microbial neighbours, in turn, may affect P. aeruginosa's virulence either positively or negatively. Such interactions among microorganisms lead to emerging persistent and antibiotic-resistant infections. This review highlights the relationship between P. aeruginosa and its microbial neighbours within the PMB in an attempt to better understand the mechanisms of polymicrobial interaction and the correlation between increased exacerbations of infection and the P. aeruginosa-microbe interaction. Researching in the literature that was carried out in vitro either in co-cultures or in the models to simulate the environment at the site of infection suggested that the interplay between P. aeruginosa and other microorganisms is one main reason for the worsening of the infection and which in turn requires a treatment approach different from that followed with P. aeruginosa mono-infection.
    Matched MeSH terms: Pseudomonas Infections*
  7. Antimicrobial susceptibility pattern of clinical isolates of Pseudomonas aeruginosa in a tertiary care hospital
    Raja NS, Singh NN
    J Microbiol Immunol Infect, 2007 Feb;40(1):45-9.
    PMID: 17332906
    BACKGROUND AND PURPOSE: Pseudomonas aeruginosa is an important cause of morbidity and mortality in hospitalized, critically ill patients and patients with underlying medical conditions such as cystic fibrosis, neutropenia, and iatrogenic immunosuppression. The prevalence of multiresistant P. aeruginosa isolates has been increasing. The aim of this study was to determine the antimicrobial susceptibility patterns in P. aeruginosa strains isolated at a university teaching hospital in Kuala Lumpur, Malaysia.
    METHODS: The Laboratory Information System of the microbiology department was retrospectively reviewed to determine the susceptibility patterns of P. aeruginosa isolates to anti-pseudomonal antibiotics, from January to June 2005. Disk diffusion methods were employed and results were interpreted according to National Committee for Clinical Laboratory Standards guidelines.
    RESULTS: 505 clinical isolates of P. aeruginosa were tested. Major sources of these isolates included respiratory tract, wound, urine and blood. The rates of antimicrobial resistance of isolates were 6.73% to amikacin, 12.9% to gentamicin, 10.1% to netilmicin, 10.9% to ceftazidime, 11.3% to ciprofloxacin, 9.9% to imipenem, 10.8% to piperacillin, 9.4% to piperacillin-tazobactam and 0% to polymyxin B. Of the 505 isolates, 29 (5.74%) were found to be multidrug-resistant; these were most commonly isolated from respiratory tract specimens of patients in surgical units, followed by respiratory tract specimens in patients in medical units.
    CONCLUSIONS: The data in this study showed low rates of antibiotic resistance among P. aeruginosa isolates. Combinations of aminoglycosides plus beta-lactams or quinolones should be the appropriate choice for empirical therapy in P. aeruginosa infections. Active antibiotic susceptibility testing and surveillance should be continued in order to curtail the problem of antibiotic resistance.
    Matched MeSH terms: Pseudomonas Infections/drug therapy; Pseudomonas Infections/microbiology; Pseudomonas Infections/prevention & control*
  8. Pulsed-field gel electrophoresis of multidrug-resistant and -sensitive strains of Pseudomonas aeruginosa from a Malaysian hospital
    Thong KL, Lai KS, Ganeswrie R, Puthucheary SD
    Jpn J Infect Dis, 2004 Oct;57(5):206-9.
    PMID: 15507777
    Over a period of 6 months from January to June 2002, an unusual increase in the isolation of highly resistant Pseudomonas aeruginosa strains was observed in the various wards and intensive care units of a large general hospital in Johor Bahru, Malaysia. An equal number of multidrug resistant (MDR) and drug-susceptible strains were collected randomly from swabs, respiratory specimens, urine, blood, cerebral spinal fluid, and central venous catheters to determine the clonality and genetic variation of the strains. Macrorestriction analysis by pulsed-field gel electrophoresis showed that the 19 MDR strains were genetically very homogenous; the majority showed the dominant profile S1 (n = 10), the rest very closely related profiles S1a (n = 1), S2 (n = 4), and S2a (n = 3), indicating the endemicity of these strains. In contrast, the 19 drug-sensitive strains isolated during the same time period were genetically more diverse, showing 17 pulsed-field profiles (F = 0.50-1.00), and probably derived from the patients themselves. The presence of the MDR clone poses serious therapeutic problems as it may become endemic in the hospital and give rise to future clonal outbreaks. There is also the potential for wider geographical spread.
    Matched MeSH terms: Pseudomonas Infections/drug therapy; Pseudomonas Infections/microbiology*; Pseudomonas Infections/epidemiology*
  9. Fulltext The impact of infectious diseases consultation on the management and outcomes of Pseudomonas aeruginosa bacteraemia in adults: a retrospective cohort study
    Chiong F, Wasef MS, Liew KC, Cowan R, Tsai D, Lee YP, et al.
    BMC Infect Dis, 2021 Jul 09;21(1):671.
    PMID: 34243714 DOI: 10.1186/s12879-021-06372-5
    BACKGROUND: Pseudomonas aeruginosa bacteraemia (PAB) is associated with high mortality. The benefits of infectious diseases consultation (IDC) has been demonstrated in Staphylococcal aureus bacteraemia and other complex infections. Impact of IDC in PAB is unclear. This study aimed to evaluate the impact of IDC on the management and outcomes in patients with PAB.

    METHODS: This is a retrospective cohort single-centre study from 1 November 2006 to 29 May 2019, in all adult patients admitted with first episode of PAB. Data collected included demographics, clinical management and outcomes for PAB and whether IDC occurred. In addition, 29 Pseudomonas aeruginosa (PA) stored isolates were available for Illumina whole genome sequencing to investigate if pathogen factors contributed to the mortality.

    RESULTS: A total of 128 cases of PAB were identified, 71% received IDC. Patients who received IDC were less likely to receive inappropriate duration of antibiotic therapy (4.4%; vs 67.6%; p 

    Matched MeSH terms: Pseudomonas Infections/drug therapy*; Pseudomonas Infections/mortality; Pseudomonas Infections/surgery
  10. First identification of metallo-beta-lactamase-producing Pseudomonas aeruginosa in the Czech Republic
    Hrabák J, Fridrichová M, Stolbová M, Bergerová T, Zemlickova H, Urbaskova P
    Euro Surveill, 2009 Jan 29;14(4).
    PMID: 19215712
    Since 2005, invasive isolates of Pseudomonas aeruginosa have been collected in the Czech Republic as part of the European Antibiotic Resistance Surveillance System (EARSS). Forty-eight microbiology laboratories throughout the country including approximately 81% of the population provide consecutive isolates from blood and cerebrospinal fluid. Surprisingly, no metallo-beta-lactamase (MBL) was found in 1,259 invasive isolates tested over the past three years until the detection of two MBL-producing strains in mid-2008. Both strains were isolated from patients hospitalised in one regional hospital. The MBL was identified as IMP-7, which had been seen previously in Canada, Japan, Malaysia and Slovakia.
    Matched MeSH terms: Pseudomonas Infections/diagnosis*; Pseudomonas Infections/microbiology*
  11. Fulltext Next generation sequencing reveals the antibiotic resistant variants in the genome of Pseudomonas aeruginosa
    Ramanathan B, Jindal HM, Le CF, Gudimella R, Anwar A, Razali R, et al.
    PLoS One, 2017;12(8):e0182524.
    PMID: 28797043 DOI: 10.1371/journal.pone.0182524
    Rapid progress in next generation sequencing and allied computational tools have aided in identification of single nucleotide variants in genomes of several organisms. In the present study, we have investigated single nucleotide polymorphism (SNP) in ten multi-antibiotic resistant Pseudomonas aeruginosa clinical isolates. All the draft genomes were submitted to Rapid Annotations using Subsystems Technology (RAST) web server and the predicted protein sequences were used for comparison. Non-synonymous single nucleotide polymorphism (nsSNP) found in the clinical isolates compared to the reference genome (PAO1), and the comparison of nsSNPs between antibiotic resistant and susceptible clinical isolates revealed insights into the genome variation. These nsSNPs identified in the multi-drug resistant clinical isolates were found to be altering a single amino acid in several antibiotic resistant genes. We found mutations in genes encoding efflux pump systems, cell wall, DNA replication and genes involved in repair mechanism. In addition, nucleotide deletions in the genome and mutations leading to generation of stop codons were also observed in the antibiotic resistant clinical isolates. Next generation sequencing is a powerful tool to compare the whole genomes and analyse the single base pair variations found within the antibiotic resistant genes. We identified specific mutations within antibiotic resistant genes compared to the susceptible strain of the same bacterial species and these findings may provide insights to understand the role of single nucleotide variants in antibiotic resistance.
    Matched MeSH terms: Pseudomonas Infections/drug therapy; Pseudomonas Infections/microbiology
  12. Fulltext Use of gallium-67 in the assessment of response to antibiotic therapy in malignant otitis externa--a case report
    Paramsothy M, Khanijow V, Ong TO
    Singapore Med J, 1997 Aug;38(8):347-9.
    PMID: 9364890
    Malignant Otitis Externa (MOE) can cause considerable morbidity and mortality in affected individuals. The outlook is now much improved with the use of ciprofloxacin, but it is important to ascertain that the infection has been completely eradicated before stopping treatment, as undertreatment may lead to a recurrence which is usually more resistant than the initial infection. Gallium-67 Single Photon Emmision Computerised Tomography (SPECT) is a sensitive and cost effective tool in monitoring the disease activity of MOE, and should be used in the assessment of the response to antibiotic therapy.
    Matched MeSH terms: Pseudomonas Infections/drug therapy*; Pseudomonas Infections/radionuclide imaging*
  13. Fulltext Dissemination of metallo-β-lactamase-producing Pseudomonas aeruginosa of sequence type 235 in Asian countries
    Kim MJ, Bae IK, Jeong SH, Kim SH, Song JH, Choi JY, et al.
    J Antimicrob Chemother, 2013 Dec;68(12):2820-4.
    PMID: 23843299 DOI: 10.1093/jac/dkt269
    To investigate the epidemiological traits of metallo-β-lactamase (MBL)-producing Pseudomonas aeruginosa (MPPA) clinical isolates collected by the Asian Network for Surveillance of Resistant Pathogens (ANSORP).
    Matched MeSH terms: Pseudomonas Infections/microbiology*; Pseudomonas Infections/epidemiology*; Pseudomonas Infections/transmission
  14. IMP-4-producing Pseudomonas aeruginosa in a French patient repatriated from Malaysia: impact of early detection and control measures
    Bert F, Vanjak D, Leflon-Guibout V, Mrejen S, Delpierre S, Redondo A, et al.
    Clin Infect Dis, 2007 Mar 1;44(5):764-5.
    PMID: 17278079
    Matched MeSH terms: Pseudomonas Infections/diagnosis; Pseudomonas Infections/microbiology; Pseudomonas Infections/prevention & control*
  15. Fulltext Antibiofilm properties of chemically synthesized silver nanoparticles found against Pseudomonas aeruginosa
    Palanisamy NK, Ferina N, Amirulhusni AN, Mohd-Zain Z, Hussaini J, Ping LJ, et al.
    J Nanobiotechnology, 2014;12:2.
    PMID: 24422704 DOI: 10.1186/1477-3155-12-2
    Nanomedicine is now being introduced as a recent trend in the field of medicine. It has been documented that metal nanoparticles have antimicrobial effects for bacteria, fungi and viruses. Recent advances in technology has revived the use of silver nanoparticles in the medical field; treatment, diagnosis, monitoring and control of disease. It has been used since ancient times for treating wide range of illnesses. Bacterial cells adheres to surfaces and develop structures known as biofilms. These structures are natural survival strategy of the bacteria to invade the host. They are more tolerant to commonly used antimicrobial agents, thus being more difficult to be controlled. This leads to increase in severity of infection. In this study, we have investigated the effect of silver nanoparticles in the formation of biofilm in multidrug resistant strains of Pseudomonas aeruginosa. Observation showed that biofilm formation occurred at bacterial concentration of 10(6) cfu/ml for the sensitive strain of P. aeruginosa while in the resistant strain, the biofilm was evident at bacterial concentration of about 10(3) cfu/ml. The biofilm were then tested against various concentrations of silver nanoparticles to determine the inhibitory effect of the silver nanoparticles. In the sensitive strain, 20 μg/ml of silver nanoparticles inhibited the growth optimally at bacterial concentration of 10(4) cfu/ml with an inhibition rate of 67%. Similarly, silver nanoparticles inhibited the formation of biofilm in the resistant strain at an optimal bacterial concentration of 10(5) cfu/ml with an inhibition rate of 56%. Thus, silver nanoparticles could be used as a potential alternative therapy to reduce severity of disease due to P. aeruginosa infections.
    Matched MeSH terms: Pseudomonas Infections/drug therapy*
  16. Fulltext Conflict of interest and signal interference lead to the breakdown of honest signaling
    Popat R, Pollitt EJ, Harrison F, Naghra H, Hong KW, Chan KG, et al.
    Evolution, 2015 Sep;69(9):2371-83.
    PMID: 26282874 DOI: 10.1111/evo.12751
    Animals use signals to coordinate a wide range of behaviors, from feeding offspring to predator avoidance. This poses an evolutionary problem, because individuals could potentially signal dishonestly to coerce others into behaving in ways that benefit the signaler. Theory suggests that honest signaling is favored when individuals share a common interest and signals carry reliable information. Here, we exploit the opportunities offered by bacterial signaling to test these predictions with an experimental evolution approach. We show that: (1) reduced relatedness leads to the relative breakdown of signaling, (2) signaling breaks down by the invasion of mutants that show both reduced signaling and reduced response to signal, (3) the genetic route to signaling breakdown is variable, and (4) the addition of artificial signal, to interfere with signal information, also leads to reduced signaling. Our results provide clear support for signaling theory, but we did not find evidence for previously predicted coercion at intermediate relatedness, suggesting that mechanistic details can alter the qualitative nature of specific predictions. Furthermore, populations evolved under low relatedness caused less mortality to insect hosts, showing how signal evolution in bacterial pathogens can drive the evolution of virulence in the opposite direction to that often predicted by theory.
    Matched MeSH terms: Pseudomonas Infections/microbiology
  17. Pseudomonas putrefaciens from clinical material
    Thong ML
    Southeast Asian J. Trop. Med. Public Health, 1976 Sep;7(3):363-6.
    PMID: 1025737
    Three strains of Pseudomonas putrefaciens were isolated from routine clinical specimens at the University Hospital, Kuala Lumpur, Malaysia. Their cultural and biochemical characteristic, and antibiotic susceptibilities are presented. Characteristics of diagnostic value were stressed. Two isolates appeared to have played a pathogenic role in chronic otitis media.
    Matched MeSH terms: Pseudomonas Infections/microbiology*
  18. Fulltext Pseudomonas laryngeal perichondritis: unexpected diagnosis
    Zainal Abidin SS, Kew TY, Azman M, Mat Baki M
    BMJ Case Rep, 2020 Dec 22;13(12).
    PMID: 33370978 DOI: 10.1136/bcr-2020-237129
    A 57-year-old male chronic smoker with underlying diabetes mellitus presented with dysphonia associated with cough, dysphagia and reduced effort tolerance of 3 months' duration. Videoendoscope finding revealed bilateral polypoidal and erythematous true and false vocal fold with small glottic airway. The patient was initially treated as having tuberculous laryngitis and started on antituberculous drug. However, no improvement was observed. CT of the neck showed erosion of thyroid cartilage, which points to laryngeal carcinoma as a differential diagnosis. However, the erosion was more diffuse and appeared systemic in origin. The diagnosis of laryngeal perichondritis was made when the histopathological examination revealed features of inflammation, and the tracheal aspirate isolated Pseudomonas aeruginosa The patient made a good recovery following treatment with oral ciprofloxacin.
    Matched MeSH terms: Pseudomonas Infections/complications; Pseudomonas Infections/diagnosis*; Pseudomonas Infections/drug therapy; Pseudomonas Infections/microbiology
  19. Topical piperacillin/tazobactam for recalcitrant pseudomonas aeruginosa keratitis
    Chew FL, Soong TK, Shin HC, Samsudin A, Visvaraja S
    J Ocul Pharmacol Ther, 2010 Apr;26(2):219-22.
    PMID: 20415627 DOI: 10.1089/jop.2009.0077
    To report the treatment of therapy-resistant Pseudomonas aeruginosa keratitis with topical piperacillin/tazobactam.
    Matched MeSH terms: Pseudomonas Infections/drug therapy*; Pseudomonas Infections/physiopathology
  20. Adjunctive use of superoxidized solution in chest wall necrotizing soft tissue infection
    Tata MD, Kwan KC, Abdul-Razak MR, Paramalingam S, Yeen WC
    Ann Thorac Surg, 2009 May;87(5):1613-4.
    PMID: 19379926 DOI: 10.1016/j.athoracsur.2008.10.019
    A 39-year-old Indian man presented with necrotizing soft tissue infection of his right forearm and previously undiagnosed diabetes mellitus. The infection progressively worsened to involve his right lateral chest wall despite multiple debridements and systemic antibiotics. His right arm was eventually disarticulated along with wide debridement of the surrounding tissue. Aggressive wound debridement, mechanical scrubbing, and irrigation were then initiated every 8 hours. A superoxidized solution was later introduced as a wound irrigant and dressing agent. The large defect was suitable for split-thickness skin grafting after 16 days of a strict wound management routine with the superoxidized solution.
    Matched MeSH terms: Pseudomonas Infections/drug therapy; Pseudomonas Infections/pathology
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