Research Topics
| D R MurdochSummaryCountry: New Zealand Publications
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Publications
High-throughput bacterial SNP typing identifies distinct clusters of Salmonella Typhi causing typhoid in Nepalese childrenKathryn E Holt
Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1SA, UK
BMC Infect Dis 10:144. 2010..Kathmandu, the capital of Nepal, is an area of high incidence and the pediatric population appears to be at high risk of exposure and infection...
Diagnosis of Legionella infectionDavid R Murdoch
Department of Pathology, Christchurch School of Medicine and Health Sciences, Canterbury Health Laboratories, Christchurch, New Zealand
Clin Infect Dis 36:64-9. 2003..Further work needs to focus on the development of urinary antigen tests assays that detect a wider range of pathogenic legionellae and on the development of standardized PCR assays...
Molecular genetic methods in the diagnosis of lower respiratory tract infectionsDavid R Murdoch
Department of Pathology, Christchurch School of Medicine and Health Sciences, and Microbiology Unit, Canterbury Health Laboratories, Christchurch, New Zealand
APMIS 112:713-27. 2004..Further work is required to better characterize the role of molecular diagnostic tests for diagnosing lower respiratory tract infections, and to develop standard assays that can be readily adopted by routine diagnostic laboratories...
Rapid identification of Staphylococcus aureus from BacT/ALERT blood culture bottles by direct Gram stain characteristicsD R Murdoch
Microbiology Unit, Canterbury Health Laboratories, Christchurch 8001, New Zealand
J Clin Pathol 57:199-201. 2004..Laboratories using the BacT/ALERT blood culture system should become familiar with these criteria so that S aureus bacteraemia can be identified rapidly...
The third regional pneumococcal symposiumDavid Murdoch
Department of Pathology, University of Otago, Christchurch, and Microbiology Unit, Canterbury Health Laboratories, Christchurch, New Zealand
IDrugs 11:242-4. 2008
Comparison of microscan broth microdilution, synergy quad plate agar dilution, and disk diffusion screening methods for detection of high-level aminoglycoside resistance in enterococcus speciesDavid R Murdoch
Clinical Microbiology Laboratory, Duke University Medical Center, Durham, North Carolina 27710, USA
J Clin Microbiol 41:2703-5. 2003..Agreement between the three methods was 99% when testing for high-level gentamicin resistance and 96% when testing for high-level streptomycin resistance...
Emerging advances in rapid diagnostics of respiratory infectionsDavid R Murdoch
Department of Pathology, University of Otago Christchurch, Christchurch 8140, New Zealand
Infect Dis Clin North Am 24:791-807. 2010..New approaches for respiratory pathogen detection are needed, and breath analysis is an exciting area with enormous potential...
Association of respiratory virus activity and environmental factors with the incidence of invasive pneumococcal diseaseDavid R Murdoch
Department of Pathology, University of Otago Christchurch, P O Box 4345, Christchurch 8011, New Zealand
J Infect 58:37-46. 2009..To correlate the incidence rate of invasive pneumococcal disease (IPD) with fluctuations in respiratory virus activity and environmental factors in Christchurch, New Zealand...
Nucleic acid amplification tests for the diagnosis of pneumoniaDavid R Murdoch
Microbiology Unit, Canterbury Health Laboratories, and Department of Pathology, Christchurch School of Medicine and Health Sciences, Christchurch, New Zealand
Clin Infect Dis 36:1162-70. 2003..Further work is required to better characterize the role of PCR versus the role of other tests for diagnosing pneumonia and to develop standard PCR assays that can be readily adopted by routine diagnostic laboratories...
Evaluation of a PCR assay for detection of Streptococcus pneumoniae in respiratory and nonrespiratory samples from adults with community-acquired pneumoniaDavid R Murdoch
Microbiology Unit, Canterbury Health Laboratories, Christchurch, New Zealand
J Clin Microbiol 41:63-6. 2003..We conclude that the pneumolysin PCR assay adds little to existing diagnostic tests for S. pneumoniae and is unable to distinguish colonization from infection when respiratory samples are tested...
Microbiological patterns in sepsis: what happened in the last 20 years?David R Murdoch
Department of Pathology, University of Otago, P O Box 4345, Christchurch, New Zealand
Int J Antimicrob Agents 34:S5-8. 2009..The microbiological pattern of sepsis has also been influenced by the rise in prevalence of HIV infection in many regions...
Evaluation of a rapid immunochromatographic test for detection of Streptococcus pneumoniae antigen in urine samples from adults with community-acquired pneumoniaD R Murdoch
Microbiology Unit, Canterbury Health Laboratories, Christchurch, New Zealand
J Clin Microbiol 39:3495-8. 2001..Concentration of urine prior to testing resulted in a small increase in yield. The NOW S. pneumoniae urinary antigen test should be a useful adjunct to culture for determining the etiology of community-acquired pneumonia in adults...
Antimicrobial susceptibilities of group B streptococci isolated from patients with invasive disease: 10-year perspectiveD R Murdoch
Clinical Microbiology Laboratory, Duke University Medical Center, Durham, North Carolina 27710, USA
Antimicrob Agents Chemother 45:3623-4. 2001..Erythromycin and clindamycin are no longer reliable empirical alternatives to penicillin for the treatment and prevention of group B streptococcal infections...
Clinical presentation, etiology, and outcome of infective endocarditis in the 21st century: the International Collaboration on Endocarditis-Prospective Cohort StudyDavid R Murdoch
Department of Pathology, University of Otago, Christchurch, PO Box 4345, Christchurch, New Zealand
Arch Intern Med 169:463-73. 2009..We sought to provide a contemporary picture of the presentation, etiology, and outcome of infective endocarditis (IE) in a large patient cohort from multiple locations worldwide...
Sequential emergence of antibiotic resistance in enterococcal bloodstream isolates over 25 yearsDavid R Murdoch
Clinical Microbiology Laboratories, Duke University Medical Center, Durham, North Carolina 27710, USA
Antimicrob Agents Chemother 46:3676-8. 2002..faecium isolates became proportionally more common over time. Our findings confirm the pattern of emerging antibiotic resistance among enterococci and highlight the increasing importance of E. faecium as a cause of bloodstream infection...
Atypical pneumonia--time to breathe new life into a useful term?David R Murdoch
Department of Pathology, University of Otago, Christchurch, New Zealand
Lancet Infect Dis 9:512-9. 2009..We need to return to the original meaning of atypical pneumonia and restrict its use to describe pneumonia that is truly unusual in clinical presentation, epidemiology, or both...
The etiology of febrile illness in adults presenting to Patan hospital in Kathmandu, NepalDavid R Murdoch
Department of Pathology, Christchurch School of Medicine and Health Sciences, University of Otago, Christchurch, New Zealand
Am J Trop Med Hyg 70:670-5. 2004..Given the lack of reliable clinical predictors, the development of cheap and accurate diagnostic tests are likely to be of great clinical utility in this setting...
Incidence and characteristics of viral community-acquired pneumonia in adultsL C Jennings
Canterbury Health Laboratories, P O Box 151, Christchurch, New Zealand
Thorax 63:42-8. 2008..The aims of this study were to characterise the viral aetiology of CAP in adults by using an extensive array of viral diagnostic tests and to compare the characteristics of viral pneumonia with those of pneumococcal pneumonia...
Concomitant Staphylococcus aureus bacteriuria is associated with poor clinical outcome in adults with S. aureus bacteraemiaP J Huggan
Department of Infectious Diseases, Christchurch Hospital, Christchurch, New Zealand
J Hosp Infect 69:345-9. 2008..Prospective studies are warranted exploring the link between S. aureus bacteriuria and clinical outcome in patients with S. aureus bacteraemia...
Detection of Legionella DNA in peripheral leukocytes, serum, and urine from a patient with pneumonia caused by Legionella dumoffiiD R Murdoch
Microbiology Unit, Canterbury Health Laboratories, Christchurch, New Zealand
Clin Infect Dis 30:382-3. 2000..dumoffii DNA in positive samples. It appears that buffy coat may be a useful sample to test for Legionella DNA, but further study is required to determine the precise sensitivity and to make comparisons with other sample types...
Risk factors for infective endocarditis in patients with enterococcal bacteremia: a case-control studyD J Anderson
Department of Medicine, Duke University Medical Center, Durham, North Carolina, USA
Infection 32:72-7. 2004..Instead, our data suggest that the presence of a PV and infection by E. faecalis are associated with an increased risk for IE...
Population-based epidemiology of Staphylococcus aureus bloodstream infection in Canterbury, New ZealandP J Huggan
Department of Infectious Diseases, Christchurch Hospital, Christchurch, New Zealand
Intern Med J 40:117-25. 2010..Few contemporary reports describe population-based incidence of Staphylcoccus aureus bloodstream infection (SABSI). Aim: To describe longitudinal incidence of SABSI in a region of New Zealand with low MRSA prevalence...
Medical microbiology: laboratory diagnosis of invasive pneumococcal diseaseAnja M Werno
Department of Microbiology, Canterbury Health Laboratories, University of Otago, Christchurch, New Zealand
Clin Infect Dis 46:926-32. 2008..There is an urgent need for improved diagnostic tests for pneumococcal disease--especially tests that are suitable for use in underresourced countries...
Heterogeneous vancomycin-intermediate susceptibility phenotype in bloodstream methicillin-resistant Staphylococcus aureus isolates from an international cohort of patients with infective endocarditis: prevalence, genotype, and clinical significanceIn Gyu Bae
Duke Clinical Research Institute, Durham, North Carolina, USA
J Infect Dis 200:1355-66. 2009..Using a multinational collection of isolates from methicillin-resistant S. aureus (MRSA) infective endocarditis (IE), we characterized patients with IE with and without hVISA, and we genotyped the infecting strains...
Infection of orthopedic prostheses after Staphylococcus aureus bacteremiaD R Murdoch
Division of Infectious Diseases and International Health, Duke University Medical Center, Durham, North Carolina, USA
Clin Infect Dis 32:647-9. 2001....
Detection of 2-pentylfuran in the breath of patients with Aspergillus fumigatusStephen T Chambers
Department of Pathology, University of Otago Christchurch, Christchurch, New Zealand
Med Mycol 47:468-76. 2009..As 2-PF is not normally found in human breath its presence may reflect the active metabolism of A. fumigatus in the airways and form the basis of a new diagnostic breath test for Aspergillus infection...
Fatal case of Campylobacter lari prosthetic joint infection and bacteremia in an immunocompetent patientAnja M Werno
Department of Microbiology, Canterbury Health Laboratory, University of Canterbury, Christchurch, New Zealand
J Clin Microbiol 40:1053-5. 2002..lari prosthetic joint infection and bacteremia in an 81-year-old immunocompetent man. The infection was associated with septic shock and fatal outcome. C. lari may cause severe disease, even in an immunocompetent host...
Campylobacter fetus-associated epidural abscess and bacteremiaJenny S J Wong
Department of Microbiology, Canterbury Health Laboratories, Christchurch, New Zealand
J Clin Microbiol 47:857-8. 2009..Campylobacter fetus has been isolated as an infrequent cause of abscesses. We report a case of Campylobacter fetus epidural abscess and bacteremia in a debilitated elderly man who had a fatal outcome...
Outpatient intravenous treatment for infective endocarditis: safety, effectiveness and one-year outcomesMatthew R Amodeo
Department of Microbiology, Canterbury Health Laboratories, Corner Hagley Ave and Tuam Street, Christchurch 8011, New Zealand
J Infect 59:387-93. 2009..To describe the use and outcomes of outpatient antimicrobial therapy (OPAT) for infective endocarditis (IE) within the Canterbury region of New Zealand over an 8 year period...
Failure to genotype herpes simplex virus by real-time PCR assay and melting curve analysis due to sequence variation within probe binding sitesTrevor P Anderson
Microbiology Unit, Canterbury Health Laboratories, Christchurch, New Zealand
J Clin Microbiol 41:2135-7. 2003..Sequence analysis showed that these strains had base-pair mismatches over the probe binding sites. An alternative assay is required to type such atypical isolates...
Successful antimicrobial therapy and implant retention for streptococcal infection of prosthetic jointsRichard J Everts
Department of Infectious Diseases, Christchurch Hospital, Christchurch, New Zealand
ANZ J Surg 74:210-4. 2004..Streptococci cause up to 20% of prosthetic joint infections but this has received little attention in the published literature...
Evaluation of the Mycoplasma Duo kit for the detection of Mycoplasma hominis and Ureaplasma urealyticum from urogenital and placental specimensG E Evans
Microbiology Unit, Canterbury Health Laboratories
Br J Biomed Sci 64:66-9. 2007..The Mycoplasma Duo test showed a significantly higher detection rate than did culture, although many of the culture-negative results may have been due to the presence of bacterial overgrowth...
The rapid evaluation of bacterial growth and antibiotic susceptibility in blood cultures by selected ion flow tube mass spectrometryRandall A Allardyce
Department of Surgery, Christchurch School of Medicine and Health Sciences, PO Box 4345, Christchurch, New Zealand
Diagn Microbiol Infect Dis 55:255-61. 2006..05). These results suggest incorporating SIFT-MS detection of microbial VOCs as a sensitive method for bacterial detection, identification, and determination of antibiotic susceptibility in a conventional blood culture system...
Characteristics of Streptococcus pseudopneumoniae isolated from purulent sputum samplesElaine R Keith
Microbiology Unit, Canterbury Health Laboratories, P.O. Box 151, Christchurch, New Zealand
J Clin Microbiol 44:923-7. 2006..67 to 20.11) or exacerbation of COPD (OR, 6.5; 95% CI, 2.61 to 16.20). Further research is needed to better characterize the epidemiology of S. pseudopneumoniae colonization and the role of S. pseudopneumoniae in COPD and other diseases...
Female genital schistosomiasisJ A Crump
Department of Infectious Diseases, Christchurch Hospital, Christchurch, New Zealand
J Travel Med 7:30-2. 2000..Schistosomiasis may not be suspected, resulting in delays in diagnosis and treatment. We present two cases which illustrate the diverse nature of this condition...
Leptotrichia endocarditis: report of two cases from the International Collaboration on Endocarditis (ICE) database and review of previous casesL B Caram
Division of Infectious Diseases, Duke University Medical Center, Box 3824, Durham, NC 27710, USA
Eur J Clin Microbiol Infect Dis 27:139-43. 2008..goodfellowii sp. nov. Both cases were identified using 16S rRNA gene sequencing. Review of the English literature revealed only two other cases of Leptotrichia sp. endocarditis...
The rapid evaluation of bacterial growth in blood cultures by selected ion flow tube-mass spectrometry (SIFT-MS) and comparison with the BacT/ALERT automated blood culture systemJ M Scotter
Syft Technologies Ltd, Medical Applications, Christchurch, New Zealand
J Microbiol Methods 65:628-31. 2006..6%) bottles at 24 h. We conclude that SIFT-MS is a sensitive method for the detection of microbial VOCs. Furthermore, profiles of the VOCs detected may allow simultaneous identification of infecting organisms...
Human metapneumovirus in children with bronchiolitis or pneumonia in New ZealandA M Werno
Microbiology Unit, Canterbury Health Laboratories, Christchurch, New Zealand
J Paediatr Child Health 40:549-51. 2004..To confirm the presence of human metapneumovirus (hMPV) in New Zealand and establish its prevalence in selected paediatric patient groups...
Viral etiology of acute respiratory tract infections in children presenting to hospital: role of polymerase chain reaction and demonstration of multiple infectionsLance C Jennings
Microbiology Unit, Canterbury Health Laboratories, Christchurch School of Medicine and Health Sciences, University of Otago, Christchurch, New Zealand
Pediatr Infect Dis J 23:1003-7. 2004..The inclusion of PCR into diagnostic testing strategies is needed to broaden our understanding of the natural ecology of respiratory viruses and the significance of multiple infections...
Detection of volatile metabolites produced by bacterial growth in blood culture media by selected ion flow tube mass spectrometry (SIFT-MS)Randall A Allardyce
Department of Surgery, Christchurch School of Medicine and Health Sciences, Christchurch, New Zealand
J Microbiol Methods 65:361-5. 2006..Pseudomonas aeruginosa, Streptococcus pneumoniae, Escherichia coli, Staphylococcus aureus and Neisseria meningitidis growth and trace gas patterns were detected from 10 colony forming units after 6 h...
Corynebacterium accolens-associated pelvic osteomyelitisJenny S J Wong
Department of Microbiology, Canterbury Health Laboratories, P O Box 151, Christchurch 8011, New Zealand
J Clin Microbiol 48:654-5. 2010..Corynebacterium accolens is a rare human pathogen. We encountered a case of C. accolens isolated from a thigh collection in a man with osteomyelitis of the adjacent pubic symphysis...
Legionnaires' disease caused by Legionella longbeachae and Legionella pneumophila: comparison of clinical features, host-related risk factors, and outcomesM R Amodeo
Department of Microbiology, Canterbury Health Laboratories, Christchurch, New Zealand
Clin Microbiol Infect 16:1405-7. 2010....
Comparison of real-time PCR and conventional hemi-nested PCR for the detection of Bordetella pertussis in nasopharyngeal samplesT P Anderson
Microbiology Unit, Canterbury Health Laboratories, PO Box 151, Christchurch, New Zealand
Clin Microbiol Infect 9:746-9. 2003..These results suggest that the hemi-nested assay is more sensitive than the real-time assay for detecting B. pertussis...
Phylogenetic analysis of viridans group streptococci causing endocarditisKeith E Simmon
Department of Pathology, University of Utah School of Medicine, Salt Lake City, Utah 84108, USA
J Clin Microbiol 46:3087-90. 2008..The hierarchy of sequence data was often discordant, underscoring the importance of establishing biological relevance for finer phylogenetic distinctions...
Emergence of Salmonella enterica serotype Paratyphi A as a major cause of enteric fever in Kathmandu, NepalChristopher W Woods
Duke University Medical Center, Durham, NC, USA
Trans R Soc Trop Med Hyg 100:1063-7. 2006..In contrast, only 21 (36%) of the 58 S. Typhi isolates exhibited a common genotype, which is consistent with endemic disease from multiple sources...
Clinical profile and strain relatedness of recurrent enterococcal bacteremiaAllen C Cheng
Department of Medicine, Duke University School of Medicine, Durham, NC, USA
Scand J Infect Dis 37:642-6. 2005..Carriage of pathogenic enterococci may be prolonged, although re-infection with novel strains is more commonly seen...
Detection of Campylobacter species in faecal samples by direct Gram stain microscopyHui Wang
Microbiology Unit, Canterbury Health Laboratories, Christchurch, New Zealand
Pathology 36:343-4. 2004..Laboratories in areas where Campylobacter enteritis is common and/or with limited resources for Campylobacter culture should consider adopting this as a routine method...
Propionibacterium endocarditis: a case series from the International Collaboration on Endocarditis Merged Database and Prospective Cohort StudyTahaniyat Lalani
Duke Clinical Research Institute, Duke University Medical Center, 2400 Pratt Street, Cube 7545, Durham, NC 27710 USA
Scand J Infect Dis 39:840-8. 2007..The clinical course is characterized by complications such as valvular dehiscence, cardiac abscesses and congestive heart failure. Treatment may require a combination of medical and surgical therapy...
Fusobacterial infections: clinical spectrum and incidence of invasive diseasePaul J Huggan
Department of Infectious Diseases, Christchurch Hospital, Riccarton Avenue, Christchurch 8011, New Zealand
J Infect 57:283-9. 2008..Clinically significant infections caused by members of the genus Fusobacterium are rare. We sought to describe the spectrum of clinical disease and epidemiology of these conditions presenting to an acute hospital over a five year period...
Comparison of the Mycoplasma Duo test with PCR for detection of ureaplasma species in endotracheal aspirates from premature infantsFook-Choe Cheah
Department of Pathology, Christchurch School of Medicine and Health Sciences, University of Otago, P.O. Box 4345, Christchurch, New Zealand
J Clin Microbiol 43:509-10. 2005..in endotracheal aspirates from 60 premature neonates. The overall agreement between the two tests was 96%. The Mycoplasma Duo assay is a useful alternative to culture and PCR for detection of neonatal Ureaplasma infection...
Statistical models of acute mountain sicknessRichard D Vann
Center for Hyperbaric Medicine and Environmental Physiology, Department of Anesthesiology, Duke University Medical Center, Durham, North Carolina, USA
High Alt Med Biol 6:32-42. 2005....
Comparison of PCR-ELISA and galactomannan detection for the diagnosis of invasive aspergillosisJennifer M Scotter
Microbiology Unit, Canterbury Health Laboratories, Christchurch School of Medicine and Health Sciences, Christchurch, New Zealand
Pathology 37:246-53. 2005..Further evaluation of PCR assays for the diagnosis of IA and other invasive fungal infections is warranted...
Impact of rapid microbiological testing on the management of lower respiratory tract infectionDavid R Murdoch
Clin Infect Dis 41:1445-7. 2005
Antimicrobial susceptibilities of group B streptococci in New ZealandAnja M Werno
Antimicrob Agents Chemother 47:2710-1. 2003
Murine typhus and febrile illness, NepalMark D Zimmerman
Patan Hospital, Kathmandu, Nepal
Emerg Infect Dis 14:1656-9. 2008..Of patients with murine typhus, 64% were women, 86% were residents of Kathmandu, and 90% were unwell during the winter. No characteristics clearly distinguished typhus patients from those with blood culture-positive enteric fever...
Genotypic diversity of coagulase-negative staphylococci causing endocarditis: a global perspectiveCathy A Petti
Department of Medicine, University of Utah School of Medicine, Salt Lake City, Utah 84108, USA
J Clin Microbiol 46:1780-4. 2008..In particular, rpoB sequence data demonstrated unique genetic signatures with the potential to serve as an important tool for global surveillance...
Contamination of Qiagen DNA extraction kits with Legionella DNAGloria E Evans
J Clin Microbiol 41:3452-3. 2003
The NOW S. pneumoniae urinary antigen test positivity rate 6 weeks after pneumonia onset and among patients with COPDDavid R Murdoch
Clin Infect Dis 37:153-4. 2003
A new phenotype of resistance to lincosamide and streptogramin A-type antibiotics in Streptococcus agalactiae in New ZealandBrigitte Malbruny
Service de Microbiologie, CHU Cote de Nacre, 14033 Caen, France
J Antimicrob Chemother 54:1040-4. 2004..To characterize a new type of resistance to clindamycin in Streptococcus agalactiae...
High prevalence of extended-spectrum beta-lactamase-producing Enterobacteriaceae in NepalDavid A Hammer
Int J Antimicrob Agents 30:471-2. 2007
Vancomycin therapy for severe Clostridium difficile-associated diarrheaPaul J Huggan
Clin Infect Dis 45:1647-8; author reply 1649-51. 2007
Immunochromatographic test for rapid detection of Streptococcus pneumoniae in the nasopharynxDavid R Murdoch
J Clin Microbiol 41:2271; author reply 2271. 2003
