At present, novel pathogens continue to emerge, while traditional pathogens are presenting new challenges, posing difficulties for clinical treatment and challenging the field of laboratory diagnostics. How to better leverage the role of clinical microbiology laboratory professionals in hospital infection control. ?

1. Ensure quality control prior to analysis.

Pre-analytical quality control is the most critical—and also the most challenging—step in ensuring the accuracy of microbiological test results. To address this, first, clinical microbiology professionals should, based on their hospital’s specific circumstances, develop a set of standardized operating procedures for specimen collection in document form, providing clinicians and nurses with practical guidance. Second, given the high turnover among nursing staff and the occasional lack of awareness regarding quality control, microbiology personnel should engage with clinical departments through various outreach efforts to underscore the importance of specimen quality to test outcomes. At the same time, the microbiology laboratory should conduct regular monitoring of specimen quality and communicate the findings to the infection control department and relevant clinical units, thereby reinforcing accountability. Finally, microbiology professionals must strengthen their sense of responsibility: rigorously verify all received specimens, process them within the prescribed time frame, and resolutely return any non‑compliant samples with clear explanations, thus preventing misdiagnosis caused by poor specimen quality.

2. Emphasize the diagnostic value of direct smears from original specimens.

Examination of smears from original specimens not only guides the entire microbiological testing process but also rapidly provides valuable diagnostic information. During bacterial culture, because of the slow growth rate and culture‑specific requirements, results cannot be reported promptly. Therefore, before culturing, specimens can be examined by smear microscopy—both unstained wet mounts under phase‑contrast microscopy and stained preparations—and, in conjunction with the patient’s clinical presentation, quickly yield diagnostic insights. This approach is particularly valuable for certain infectious diseases, especially severe and acute infections. For example, positive findings in sterile body fluids such as blood, pleural or peritoneal fluid, and cerebrospinal fluid can be swiftly communicated to clinicians based on bacterial morphology and staining characteristics, enabling empiric antimicrobial therapy. The value of microscopic morphological analysis in bacterial identification extends far beyond this; however, with the widespread adoption of automated instruments and molecular techniques, there appears to be a tendency in clinical practice to overlook morphological examination. Furthermore, the lack of standardized morphological reference charts for model strains, coupled with the need for extensive experience to interpret microscopic features, has made routine implementation of microscopic morphological assessment challenging across many hospitals. Consequently, every laboratory professional must accord this method the highest priority, diligently hone fundamental skills, and systematically summarize and synthesize findings. In addition, relevant institutions should promptly establish standardized protocols for morphological examination, providing clinicians with clear guidelines and ensuring that microscopic morphological analysis fully realizes its intended value.

3. Developing rapid and accurate diagnostic technologies

For infectious diseases with high morbidity and mortality rates, particularly those caused by pathogens that are difficult to culture in vitro, there is an urgent clinical need for rapid and accurate diagnostic methods. At present, serological assays and multiplex polymerase chain reaction… (Polymerase Chain Reaction) The application of technologies such as gene chips and peptide mass spectrometry in the field of microbiology has improved the diagnostic accuracy for challenging pathogens. However, due to resource constraints, many cutting-edge techniques remain difficult to implement in primary‑level hospitals. Consequently, how to more effectively enhance these facilities’ capacity for rapid diagnosis of infectious diseases has emerged as a pressing and novel challenge for every microbiology laboratory professional.

4. Ensure standardization of bacterial susceptibility testing.

Strengthening the standardization and regularization of antimicrobial susceptibility testing is essential for achieving accurate results. First, reliable susceptibility testing requires qualified reagents and standardized assay methods. At present, many microbiology laboratories in domestic hospitals employ… K-B Antimicrobial susceptibility testing is performed using the disk diffusion method, which is recommended by the Clinical and Laboratory Standards Institute. (CLSI) It is a widely recognized method for antimicrobial susceptibility testing, but it is relatively susceptible to variations in the quality of the test disks, M-H Factors such as agar thickness and bacterial suspension concentration can influence the results; therefore, to obtain accurate antimicrobial susceptibility results, rigorous internal quality control must be implemented to ensure the integrity of the susceptibility disks and… M-H The controlled status of agar and similar substances should also be fully understood. K-B The limitations of the method: for strains that cannot be detected using this method, reference should be made to… CLSI Recommended minimum inhibitory concentration (MIC) First, laboratory testing must be conducted rigorously; second, clinical microbiology professionals should prioritize the continuous development of their own technical expertise. As clinical understanding of bacterial resistance deepens and new anti-infective agents emerge in rapid succession, the time-honored discipline of microbiology is once again gaining prominence. To better interpret antimicrobial susceptibility testing, microbiologists must continually expand their knowledge base, actively participate in professional academic exchanges, stay abreast of emerging trends in antimicrobial susceptibility testing, and engage in proficiency testing programs to enhance their analytical skills. Finally, relevant authorities should proactively conduct research and rationally establish national standards for antimicrobial susceptibility testing. ” , due to differences in the types of antimicrobial agents available domestically and internationally, as well as variations in clinical prescribing practices, among other factors, when applying CLSI At the same time, standards for antimicrobial susceptibility testing suitable for China should also be established. This endeavor undoubtedly holds significant practical importance for more effectively elevating the country’s level of anti-infective therapy.

5. Actively engage in effective communication with clinical departments.

At present, clinical microbiology is advancing rapidly, with new forms of antimicrobial resistance and novel strains being continuously identified. Even specialized laboratory personnel are struggling to keep pace, while many clinicians remain poorly informed. To transform limited laboratory data into clinically actionable diagnostic information and better serve patients, microbiologists must engage in ongoing, proactive, and effective communication with the clinical team. Before undertaking pathogen identification, microbiologists should gather as much patient information as possible—such as sex, age, and presumptive diagnoses—and integrate this with clinical signs and symptoms to arrive at accurate interpretations and facilitate sound analytical reasoning. ( Whether the specimen is from a colonized or sterile site, and whether the organism is a typical pathogen or an opportunistic pathogen. ) …thereby enabling the next step of testing. At the same time, microbiology laboratory personnel should regularly and systematically engage with clinical departments, actively participate in ward rounds and multidisciplinary consultations, and—particularly in cases of critical or complex conditions—join case discussions. They should strive to provide guidance on proper specimen collection prior to the initiation of antimicrobial therapy, endeavoring to identify microbial species through multiple approaches. For infectious diseases that remain undiagnosed, they should, based on prevailing epidemiological trends of pathogenic microorganisms, advise on prophylactic antimicrobial strategies, aiming for early targeted treatment to control infection. Effective and proactive communication not only helps clinicians optimize antimicrobial use but also highlights areas for improvement in laboratory practices, facilitating the implementation of additional valuable diagnostic tests and ultimately enhancing patient care. By maintaining close collaboration with clinical teams and gaining a thorough understanding of patients’ clinical presentations and physiological status, laboratory staff can assist clinicians in making informed decisions grounded in pharmacodynamic principles. ( Pharmacokinetics ) The principle of rational drug use—appropriately employing antimicrobial agents—not only achieves the goal of eradicating pathogenic microorganisms but also helps reduce the emergence of bacterial resistance. Furthermore, enhancing follow-up services and providing clear explanations of the format, content, and clinical significance of laboratory reports enables clinicians to accurately interpret the information conveyed, thereby ensuring that microbiological test reports fulfill their intended purpose.

6. Actively participate in hospital infection control efforts.

Microbiological testing personnel should monitor the sterilization status of each batch of medical devices and conduct air monitoring in key areas such as operating rooms, intensive care units, and treatment and dressing rooms in various departments. Any issues identified should be promptly reported to the infection control department and clinical staff. In addition, they should be familiar with the prevalence and trends of antimicrobial resistance among common pathogens in local hospitals and regularly provide feedback to the infection control team and clinicians, thereby supporting the development of the hospital’s antimicrobial stewardship guidelines, guiding appropriate drug use, and delaying the emergence of bacterial resistance. Targeted surveillance of important hospital‑acquired pathogens should also be implemented to prevent nosocomial infections.

On the basis of hospital infection surveillance, the scientific implementation of disinfection and isolation is crucial for the prevention and control of healthcare-associated infections. Clinical microbiology laboratory personnel should provide appropriate guidance and oversight of disinfection and isolation practices, remain highly vigilant regarding highly transmissible or multidrug‑resistant pathogens and atypical infections identified in the hospital, and promptly report such cases to the infection control department. In the event of a hospital outbreak or an infection caused by a particularly resistant pathogen, they should participate in the development of disinfection and isolation protocols and offer expert recommendations on aspects such as staff management and waste disposal.

In summary, as infectious diseases continue to pose a serious threat to human health, clinical microbiology professionals should further enhance their theoretical expertise and broaden their knowledge in the diagnosis and management of infectious diseases. At the same time, they should fulfill their roles by ensuring accurate and rapid pathogen identification, engaging in timely and effective communication with clinicians, and actively participating in diagnostic and therapeutic decision‑making. Moreover, they must strengthen hospital infection surveillance and provide guidance to clinical teams on the implementation of evidence‑based disinfection and isolation measures, thereby fully contributing to hospital infection control.