Abstract:
:Purpose. Antimicrobial susceptibility is slow to determine, taking several days to fully impact treatment. This proof-of-concept study assessed the feasibility of using machine-learning techniques for analysis of data produced by the flow cytometer-assisted antimicrobial susceptibility test (FAST) method we developed.Methods. We used machine learning to assess the effect of antimicrobial agents on bacteria, comparing FAST results with broth microdilution (BMD) antimicrobial susceptibility tests (ASTs). We used Escherichia coli (1), Klebsiella pneumoniae (1) and Staphylococcus aureus (2) strains to develop the machine-learning algorithm, an expanded panel including these plus E. coli (2), K. pneumoniae (3), Proteus mirabilis (1), Pseudomonas aeruginosa (1), S. aureus (2) and Enterococcus faecalis (1), tested against FAST and BMD (Sensititre, Oxoid), then two representative isolates directly from blood cultures.Results. Our data machines defined an antibiotic-unexposed population (AUP) of bacteria, classified the FAST result by antimicrobial concentration range, and determined a concentration-dependent antimicrobial effect (CDE) to establish a predicted inhibitory concentration (PIC). Reference strains of E. coli, K. pneumoniae and S. aureus tested with different antimicrobial agents demonstrated concordance between BMD results and machine-learning analysis (CA, categoric agreement of 91 %; EA, essential agreement of 100 %). CA was achieved in 35 (83 %) and EA in 28 (67 %) by machine learning on first pass in a challenge panel of 27 Gram-negative and 15 Gram-positive ASTs. Same-day AST results were obtained from clinical E. coli (1) and S. aureus (1) isolates.Conclusions. The combination of machine learning with the FAST method generated same-day AST results and has the potential to aid early antimicrobial treatment decisions, stewardship and detection of resistance.
journal_name
J Med Microbioljournal_title
Journal of medical microbiologyauthors
Inglis TJJ,Paton TF,Kopczyk MK,Mulroney KT,Carson CFdoi
10.1099/jmm.0.001092subject
Has Abstractpub_date
2020-05-01 00:00:00pages
657-669issue
5eissn
0022-2615issn
1473-5644journal_volume
69pub_type
杂志文章abstract::The ability of rabbits to clear an intraperitoneal injection of Pseudomonas aeruginosa in the presence or absence of a surgically implanted peritoneal device was investigated. Sham-operated rabbits without an implant eliminated a P. aeruginosa challenge of 5 x 10(6) cfu/ml; lavage fluid and peritoneal tissues became c...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/00222615-36-6-406
更新日期:1992-06-01 00:00:00
abstract::Helicobacter pylori infection represents a key factor in the aetiology of various gastrointestinal diseases. H. pylori infection diagnosis is generally achieved using both invasive (e.g. biopsy of the gastric epithelium) and non-invasive methods. Therefore, cultivation on a growth medium becomes complex. Trypsin is a ...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/jmm.0.000054
更新日期:2015-06-01 00:00:00
abstract::Streptococcus pneumoniae remains a leading cause of serious paediatric disease. However, there are few published epidemiological data regarding invasive pneumococcal disease (IPD) in many countries in South East Asia, including Singapore. Baseline data for IPD are essential to inform policy regarding pneumococcal conj...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/jmm.0.030007-0
更新日期:2011-06-01 00:00:00
abstract::Some strains of Helicobacter pylori are known to produce an extracellular cytotoxin that causes vacuolation in cultured mammalian cells. Screening for such strains makes use of HeLa cells which may not be sensitive enough to detect minimal changes. The aim of this study was to develop a more sensitive cell line. Vacuo...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/00222615-46-8-705
更新日期:1997-08-01 00:00:00
abstract::Here, we describe four cases of laboratory-confirmed Legionella infection. Case 1 was a culture-confirmed case of Legionella infection in a patient with liver cirrhosis. Following this, three other liver cirrhosis cases (cases 2-4) were diagnosed with Legionella infection as confirmed by quantitative real-time PCR. Th...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/jmm.0.040170-0
更新日期:2012-07-01 00:00:00
abstract::Coccidioidal pericarditis is a condition found in approximately 1-5% of patients infected by Coccidioides species. It is associated with widely diverse clinical symptoms. This paper reports a case of coccidioidal pericarditis diagnosed by an in-house Coccidioides posadasii antigen and confirmed with mycological and mo...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/jmm.0.2008/002428-0
更新日期:2008-10-01 00:00:00
abstract::This study attempted to determine whether cefuroxime was superior to cephalothin as a surrogate marker for cefpodoxime among urinary tract isolates. The MicroScan system (Siemens) was used to determine susceptibility for cephalothin and cefuroxime on consecutive cultures with a colony count of ≥50 000 organisms. Simul...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/jmm.0.063040-0
更新日期:2014-02-01 00:00:00
abstract::Campylobacter fetus subsp. fetus infection can occur in female sheep, causing infertility or abortion. Despite extensive research on the effect of these bacteria on female fertility, little research has been done on the influence of C. fetus subsp. fetus on the male factor. Our objective was to examine the influence o...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/jmm.0.2008/001057-0
更新日期:2008-11-01 00:00:00
abstract::Introduction.Serratia marcescens is a bacterial pathogen that causes ventilator-associated pneumonia and ocular infections. The FlhD and FlhC proteins complex to form a heteromeric transcription factor whose regulon, in S. marcescens, regulates genes for the production of flagellum, phospholipase A and the cytolysin S...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/jmm.0.001292
更新日期:2020-12-10 00:00:00
abstract::The surface structures of the cell envelopes of 16 clinical isolates of Pseudomonas aeruginosa were examined by electronmicroscopy with the new fixation technique of freeze-substitution. Two types of structures were observed among the organisms. In one group of strains, mostly isolated from blood, a dense fibrous laye...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/00222615-40-4-282
更新日期:1994-04-01 00:00:00
abstract::The acute dental abscess is frequently underestimated in terms of its morbidity and mortality. The risk of potential serious consequences arising from the spread of a dental abscess is still relevant today with many hospital admissions for dental sepsis. The acute dental abscess is usually polymicrobial comprising fac...
journal_title:Journal of medical microbiology
pub_type: 杂志文章,评审
doi:10.1099/jmm.0.003517-0
更新日期:2009-02-01 00:00:00
abstract::A new 1,8-naphthyridine quinolone antimicrobial, PD131628, was found to be as, or more active than ciprofloxacin or ofloxacin against Escherichia coli and considerably more active than the two 4-quinolone agents against staphylococci in terms of both MIC and OBC (the optimum bactericidal concentration, at which the ra...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/00222615-36-5-353
更新日期:1992-05-01 00:00:00
abstract::The faecal flora and mucosa-associated flora (MAF) of rectal biopsy material from 12 patients with active Crohn's disease were studied before and during treatment with a combination of metronidazole and cotrimoxazole given orally for at least 2 weeks. The total faecal flora was greater than the MAF although the propor...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/00222615-18-3-335
更新日期:1984-12-01 00:00:00
abstract::A simple method is described for testing milk specimens from nursing mothers for the presence of RNA-dependent DNA-polymerase activity. Positive results were obtained in five of 137 women (3.6%) without a family history of breast cancer, and in six of 31 women (19.3%) with a family history of breast cancer. ...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/00222615-8-3-447
更新日期:1975-08-01 00:00:00
abstract:PURPOSE:In the present study, enhancement of the the antibacterial activity of ceftriaxone against Gram-positive (meticillin-resistant Staphylococcus aureus; MRSA) and Gram-negative (Escherichia coli) bacteria with a biodegradable polymer was attempted. METHODOLOGY:MRSA and E. coli were collected and identified by bio...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/jmm.0.000445
更新日期:2017-03-01 00:00:00
abstract::A total of 63 Aeromonas strains isolated from diarrhoeal faeces or water samples were tested for adhesion to HEp-2 cells. An association between diarrhoea and high level adhesion was observed in that 12 of the 34 faecal isolates and none of the 29 environmental isolates yielded greater than 20 bacteria per HEp-2 cell ...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/00222615-26-1-19
更新日期:1988-05-01 00:00:00
abstract::Infection of humans by Abiotrophia defectiva, a nutritionally variant streptococcus, most commonly takes the form of endocarditis, though a variety of other manifestations ranging from central nervous system abscesses to orthopaedic infections have been seen. We report here what we believe is the first case of bullous...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/jmm.0.041301-0
更新日期:2012-07-01 00:00:00
abstract::The relationship between Streptococcus constellatus, one of the species of the "Streptococcus milleri group", and Prevotella intermedia was studied in a model of pneumonia in mice and in vitro to elucidate mechanisms of pathogenicity in "S. milleri group"-associated pulmonary infection. Acute pneumonia with or without...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/00222615-40-2-118
更新日期:1994-02-01 00:00:00
abstract::Formalin-killed cells of Pseudomonas aeruginosa strain M-24 elicited an antibody-independent protective effect against P. aeruginosa infection in mice. The effect was observed as early as 6 h after administration and 100% protection was obtained by 48 h. The protective effect could not be attributed to the production ...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/00222615-28-2-101
更新日期:1989-02-01 00:00:00
abstract::The purpose of the present study was to analyse mutations in the gyrA and gyrB genes of Mycobacterium tuberculosis and define the possible correlation between these mutations and resistance to levofloxacin (LVX), moxifloxacin (MFX) and gatifloxacin (GAT), based on their MICs. One hundred and forty-two M. tuberculosis ...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/jmm.0.046821-0
更新日期:2013-01-01 00:00:00
abstract::The influence of six immunosuppressive agents on the occurrence of endogenous bacteraemia in mice was evaluated. The mortality rates in conventional ddY mice given cyclophosphamide (CY), fluorouracil (5-FU), methotrexate (MTX), cisplatin (CDDP) or FK-506 intraperitoneally, or dexamethasone (DXM) subcutaneously were 70...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/00222615-42-3-181
更新日期:1995-03-01 00:00:00
abstract::This study investigated the comparative performance of the Amplicor assay and an in-house semi-automated, multiplex real-time PCR for the diagnosis of genital chlamydial infection. Four different assays, the COBAS Amplicor CT test (Amplicor PCR), in-house real-time PCR (IHRT-PCR), in-house nested cryptic plasmid PCR a...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/jmm.0.46762-0
更新日期:2007-03-01 00:00:00
abstract::The heparin-binding properties of six different species of coagulase-negative staphylococci were examined by a particle agglutination assay. Heparin (mol. wt 4000-6000), mildly treated with sodium periodate, was covalently coupled to amino-modified latex beads (0.72 micron diameter). The particle agglutination assay w...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/00222615-45-4-263
更新日期:1996-10-01 00:00:00
abstract::The potential of human plasma (HP) or serum (HS) as a replacement for fetal calf serum (FCS) was evaluated in a liver infusion tryptose (LIT) medium for bulk cultivation of Leishmania donovani promastigotes. The promastigote yield with the LIT-FCS standard medium was 0.4-1.8×10(7) ml(-1), and yields of 0.5-3.4×10(7) (...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/jmm.0.052993-0
更新日期:2013-08-01 00:00:00
abstract::Streptococcus dysgalactiae subsp. equisimilis (SDSE) isolates are the most common group C streptococci in humans and reports of invasive infections associated with SDSE have been increasing. Molecular epidemiology studies are an important strategy to trace the emergence and spread of possible well-fit bacterial pathog...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/jmm.0.000052
更新日期:2015-05-01 00:00:00
abstract::The frequency distribution of plasmids in a representative collection of Escherichia coli and other enterobacteria was compared with the frequencies predicted by the Poisson distribution. The distribution of E. coli plasmids did not differ significantly (p greater than 0.2) whereas the difference between observed and ...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/00222615-23-3-255
更新日期:1987-05-01 00:00:00
abstract:INTRODUCTION:The last few years have seen the emergence of multi-drug resistant (MDR) Gram-negative infections, which are associated with high morbidity and mortality. The indiscriminate use of colistin has led to the development of resistance, which can be diagnosed effectively by broth microdilution. Studies from Ind...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/jmm.0.000986
更新日期:2019-06-01 00:00:00
abstract::Pseudomonas aeruginosa is an opportunistic pathogen that poses a threat in clinical settings due to its intrinsic and acquired resistance to a wide spectrum of antibiotics. Additionally, the presence of a subpopulation of cells surviving high concentrations of antibiotics, called persisters, makes it virtually impossi...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/jmm.0.019703-0
更新日期:2011-03-01 00:00:00
abstract:PURPOSE:The aim of this study was to assess the biotope of the Cryptococcus neoformans/Cryptococcus gattii species complex from Ivory Coast, and clarify the possible epidemiological relationship between environmental and clinical strains. METHODOLOGY:Samples from Eucalyptus camaldulensis (n=136), Mangifera indica (n=1...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/jmm.0.000654
更新日期:2018-01-01 00:00:00
abstract::Clostridium difficile-associated diarrhoea (CDAD) is the most common hospital-acquired diarrhoea, and is a major type of gastroenteritis infection in nursing homes and facilities for the elderly. In this study the antimicrobial activity of the two-component lantibiotic, lacticin 3,147, against a range of genetically d...
journal_title:Journal of medical microbiology
pub_type: 杂志文章
doi:10.1099/jmm.0.47085-0
更新日期:2007-07-01 00:00:00