Evidence map›Paper›PMID 29187563›Full record

ArticleJournal of clinical microbiology2018

Automated Interpretation of Blood Culture Gram Stains by Use of a Deep Convolutional Neural Network.

Kenneth P Smith, Anthony D Kang, James E Kirby

Abstract read
In one paragraph

Article in Journal of clinical microbiology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 68 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
68citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

68 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Artificial Intelligence in Infectious Diseases and Clinical Microbiology.Infectious diseases & clinical microbiology · 2026
    Review
  3. Observational
  4. Article
  5. Observational
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  7. Review
  8. Identification ofJournal of clinical microbiology · 2026
    Article
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  11. What's not to learn? AI meets parasitology.Journal of clinical microbiology · 2026
    Article
  12. Review
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  14. Article
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8 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors.

Kenneth P Smith *Department of Pathology, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA.
Anthony D Kang *Department of Pathology, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA.
James E KirbyDepartment of Pathology, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA jekirby@bidmc.harvard.edu.

Funding

Harvard Clinical and Translational Science CenterUL1TR001102 · NCATS · HARVARD MEDICAL SCHOOL · PI NADLER, LEE MARSHALL · 2013 to 2017
$106.2M
Identification and Characterization of Novel Antimicrobial Adjunctives to Restore Susceptibility to Carbapenem Resistant EnterobacteriaceaeF32AI124590 · NIAID · BETH ISRAEL DEACONESS MEDICAL CENTER · PI SMITH, KENNETH PATRICK · 2017 to 2019
$175k
NCATS NIH HHS UL1 TR001102NIAID NIH HHS F32 AI124590
6 · The paper itself

Abstract

Microscopic interpretation of stained smears is one of the most operator-dependent and time-intensive activities in the clinical microbiology laboratory. Here, we investigated application of an automated image acquisition and convolutional neural network (CNN)-based approach for automated Gram stain classification. Using an automated microscopy platform, uncoverslipped slides were scanned with a 40× dry objective, generating images of sufficient resolution for interpretation. We collected 25,488 images from positive blood culture Gram stains prepared during routine clinical workup. These images were used to generate 100,213 crops containing Gram-positive cocci in clusters, Gram-positive cocci in chains/pairs, Gram-negative rods, or background (no cells). These categories were targeted for proof-of-concept development as they are associated with the majority of bloodstream infections. Our CNN model achieved a classification accuracy of 94.9% on a test set of image crops. Receiver operating characteristic (ROC) curve analysis indicated a robust ability to differentiate between categories with an area under the curve of >0.98 for each. After training and validation, we applied the classification algorithm to new images collected from 189 whole slides without human intervention. Sensitivity and specificity were 98.4% and 75.0% for Gram-positive cocci in chains and pairs, 93.2% and 97.2% for Gram-positive cocci in clusters, and 96.3% and 98.1% for Gram-negative rods. Taken together, our data support a proof of concept for a fully automated classification methodology for blood-culture Gram stains. Importantly, the algorithm was highly adept at identifying image crops with organisms and could be used to present prescreened, classified crops to technologists to accelerate smear review. This concept could potentially be extended to all Gram stain interpretive activities in the clinical laboratory.

Indexed as

Blood CultureGentian VioletNeural Networks, ComputerPhenazinesAlgorithmsAutomation, LaboratoryBig DataDeep LearningHumansImage Interpretation, Computer-AssistedMicroscopyReproducibility of ResultsSensitivity and SpecificityGentian VioletGram's stainPhenazinesanalyticsartificial intelligenceautomated microscopybig datablood culturedeep learningGram stainmachine learningneural network

Identifiers

PMID29187563
PMCPMC5824030

What OpenQuestion holds

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Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.