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Open research questions in Bacterial Identification and Susceptibility Testing

135 gap statements mined from Bacterial Identification and Susceptibility Testing papers in our 4.5M-paper local library, which holds 906 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

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What the literature leaves open

  • The clinical value of Gram stain is now less consistent across specimen types. Molecular diagnostics introduce substantial interpretative challenges. Distinguishing colonization from infection and interpreting low-abundance signals remain difficult.

    Evolving microbiology laboratories: mastering automated culture-based processes and molecular assays, an institutional experience · 2026 · DOI

  • Further refinement and implementation of enrichment techniques are needed. The development of new enrichment methods that can improve the sensitivity, specificity, and overall efficiency of mNGS is necessary.

    Enrichment techniques for clinical metagenomics · 2026 · DOI

  • There is a need to understand the epidemiology and outcomes of bacterial co-detections in patients with influenza. The study aims to address this gap by describing the epidemiology and outcomes of blood culture co-detections among persons hospitalized with influenza.

    Prevalence and Outcomes of Bacterial Co-detections by Blood Culture Among Children and Adults Hospitalized With Laboratory-confirmed Influenza, Influenza Hospitalization Surveillance Network, 2022–2024 · 2026 · DOI

  • Conventional blood culture has limitations, including delayed pathogen identification and prolonged empirical antibiotic therapy. There is a need for rapid diagnostic platforms that can improve microbiological diagnosis and patient outcomes.

    Diagnostic Performance of FilmArray and MALDI-TOF for the Detection of Klebsiella pneumoniae for Sepsis and Bloodstream Infections: A Meta-Analysis · 2026 · DOI

  • The presence of commensal species in stool samples can make it difficult to isolate enteric pathogens. The lack of a perfect gold standard for estimating diagnostic sensitivity and specificity. The resource intensity of stool culture protocols.

    Optimization of stool culture protocol in a tertiary hospital in Bangkok, Thailand: a prospective cohort study · 2026 · DOI

  • The necessity of specific selective media for isolating enteric pathogens is frequently debated. There is a lack of studies on the prevalence of enteric pathogens in Thai tertiary hospitals.

    Optimization of stool culture protocol in a tertiary hospital in Bangkok, Thailand: a prospective cohort study · 2026 · DOI

  • Our study has several important limitations that must be acknowledged. First, in addition to the single-center observational design and lack of longitudinal time-series tracking, no formal diagnostic stewardship intervention was implemented during the study period; therefore, the data represent baseline epidemiology rather than interventional outcomes.

    Blood Culture Utilization, Contamination Rates, Antibiotic Use, and Patient Outcomes in Intensive Care Units at a Tertiary Care Hospital in Western India: A Prospective Observational Study · 2026 · DOI

  • The study had a limited sample size. The compliance rates with the ISDD varied across wards. The study did not account for potential confounding variables.

    Efficacy of a small-volume blood culture diversion device across three wards: a 6-month retrospective review · 2026 · DOI

  • There is a need for studies on the distribution of bacterial pathogens in hospitalized patients. There is a lack of data on antimicrobial susceptibility profiles of bacterial isolates from pus cultures.

    Bacterial pathogen spectrum and antimicrobial resistance in positive pus cultures from hospitalized patients at a maternal and child healthcare specialty hospital in Shenzhen, China, 2021–2025 · 2026 · DOI

  • Lack of data on compliance with the pre-analytical delay standard.

    Pre-analytical delay of blood cultures: An observational study with an appraisal of the effects of laboratory centralisation. · 2026 · DOI

  • The need for an automated classification system for Gram-stained bacterial microscopy images. The lack of a comparative study of frozen and fine-tuned ResNet-50 strategies for this task.

    Classification of Gram-Stained Microscopy Images of Bacteria Cultured on Multiple Media Using Frozen and Fine-Tuned ResNet-50 Transfer Learning: A Comparative Study · 2026 · DOI

  • Limited evidence supporting decolonization therapy to prevent BSI in asymptomatic carriers. Need for accurate prediction of subsequent bloodstream infection risk in CRE carriers. Limited understanding of the features contributing to bloodstream infection development.

    Machine learning-based prediction of bloodstream infection in rectal carbapenem-resistant Enterobacterales carriers: a multicenter retrospective cohort study · 2026 · DOI

  • WHONET, free software distributed since 1989 for the management and analysis of microbiological laboratory data, has been taken up in more than one hundred countries, but its documented application to food isolates remains sparse relative to human clinical use.

    Beyond the Antibiogram: The Significance and Advantages of WHONET-Driven AST Analysis in the Modern Food Microbiology Laboratory · 2026 · DOI

  • Future studies can build on the study's findings by exploring the mechanisms underlying the associations between wound microbiota and length of stay. Future studies can also investigate the use of 16S rRNA sequencing and conventional culture in other types of wounds.

    16S rRNA sequencing and conventional culture provide complementary information in hospitalized patients with chronic lower-limb wounds · 2026 · DOI

  • The study aims to address this gap by comparing the results of 16S rRNA sequencing and conventional culture.

    16S rRNA sequencing and conventional culture provide complementary information in hospitalized patients with chronic lower-limb wounds · 2026 · DOI

  • Bacterial co-infections can result in severe illness and death. The study had to account for the complex survey design. The study had to collect information on bacterial blood cultures within a limited time frame.

    Prevalence and Outcomes of Bacterial Co-detections by Blood Culture Among Children and Adults Hospitalized With Laboratory-confirmed Influenza, Influenza Hospitalization Surveillance Network, 2022–2024 · 2026 · DOI

  • The study notes that high BC utilization in adult ICUs is associated with excessive contamination rates.

    Blood Culture Utilization, Contamination Rates, Antibiotic Use, and Patient Outcomes in Intensive Care Units at a Tertiary Care Hospital in Western India: A Prospective Observational Study · 2026 · DOI

  • The contamination rate is largely attributed to the blood draw collection process. The use of ISDDs can be affected by compliance rates. The study's findings can be limited by potential confounding variables.

    Efficacy of a small-volume blood culture diversion device across three wards: a 6-month retrospective review · 2026 · DOI

  • Classification of Gram-stained bacterial microscopy images is a challenging task. Culture medium type affects classification difficulty. Limited dataset size.

    Classification of Gram-Stained Microscopy Images of Bacteria Cultured on Multiple Media Using Frozen and Fine-Tuned ResNet-50 Transfer Learning: A Comparative Study · 2026 · DOI

  • And finally, the prognostic factor model is based on all deaths among patients with bacteremia; it could not be established using only those patients who died from cellulitis-associated bacteremia, as there were too few of them (n = 13).

    Clinical predictors, microbiological profile, and outcomes of bacteremia in patients with cellulitis: a 6-year retrospective cohort study · 2026 · DOI

  • Pre- and post-session assessments can be used to better assess students' knowledge acquisition and retention. The session can be expanded to include more cases and topics.

    An Interactive, Case-Based Microbiology Laboratory Session for First-Year Medical Students · 2026 · DOI

  • Many medical schools have reduced or eliminated in-person microbiology wet labs. This reduction can negatively impact students' understanding of clinical microbiology concepts.

    An Interactive, Case-Based Microbiology Laboratory Session for First-Year Medical Students · 2026 · DOI

  • The future of infectious disease diagnostics is likely to involve integration across modalities. Combining pathogen detection with host-response biomarkers may enable more accurate diagnosis and risk stratification. Multi-omics approaches that integrate genomics, proteomics, and metabolomics could further enhance diagnostic precision.

    The spiral evolution of techniques for the laboratory diagnosis of microbial infections · 2026 · DOI

  • Further evaluation of the clinical value of automated digital microscopy combined with deep-learning-based image analysis. Development of more effective frameworks for integrating phenotypic and molecular approaches in microbiology laboratories. Investigation of the potential of artificial intelligence in improving the efficiency of microbiology laboratories.

    Evolving microbiology laboratories: mastering automated culture-based processes and molecular assays, an institutional experience · 2026 · DOI

  • Further evaluation of the BCID2 method in clinical practice. Comparison of the BCID2 method with other diagnostic tests. Investigation of the cost-effectiveness of the BCID2 method.

    Clinical performance of the BioFire Blood Culture Identification 2 panel for microorganism species identification and resistance gene detection in blood culture-positive specimens · 2026 · DOI

Most-cited papers in Bacterial Identification and Susceptibility Testing

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Open questions raised by papers listed on this page include: (1) Further refinement and implementation of enrichment techniques are needed (“Enrichment techniques for clinical metagenomics”, 2026); (2) There is a need to understand the epidemiology and outcomes of bacterial co-detections in patients with influenza (“Prevalence and Outcomes of Bacterial Co-detections by Blood Culture Among…”, 2026); (3) There is a need for rapid diagnostic platforms that can improve microbiological diagnosis and patient outcomes (“Diagnostic Performance of FilmArray and MALDI-TOF for the Detection of…”, 2026); (4) The lack of a perfect gold standard for estimating diagnostic sensitivity and specificity (“Optimization of stool culture protocol in a tertiary hospital in Bangkok,…”, 2026); (5) There is a need for studies on the distribution of bacterial pathogens in hospitalized patients (“Bacterial pathogen spectrum and antimicrobial resistance in positive pus…”, 2026). 135 gap statements have been mined from Bacterial Identification and Susceptibility Testing papers in our 4.5M-paper local library, which holds 906 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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