Related Experiment Video
Updated: Aug 15, 2026
Imaging InlC Secretion to Investigate Cellular Infection by the Bacterial Pathogen Listeria monocytogenes
Published on: September 19, 2013
What is infection?
1Division of Technology Planning, Mallinckrodt Medical, St. Louis, Missouri 63134.
Abstract:
Wound colonization by bacteria is not always the same as invasive infection. Furthermore, the classic definition of infection does not always aid the clinician in determining whether a patient is in the process of developing life-threatening sepsis. Although research efforts have focused on identification and quantification of organisms involved, the predictive value of this variable is limited. Other variables, such as the nature of the organism, nature of the wound, and nature of the host's defense mechanisms must also be considered. For instance, large acute wounds have been found to react differently to skin flora organisms than small, chronic, ulcerative wounds. Careful and frequent patient and wound assessment is still required to predict if and when offending organisms, their toxins, or both reach sufficient concentrations to overwhelm their local host defenses.
Insights
Bacterial wound colonization differs from infection, and identifying bacteria alone is insufficient for predicting sepsis. Comprehensive patient and wound assessment is crucial for effective clinical management and preventing severe outcomes.
Area of Science:
- Microbiology
- Infectious Diseases
- Wound Care
Background:
- Bacterial wound colonization is distinct from invasive infection.
- Current methods for identifying and quantifying bacteria have limited predictive value for sepsis development.
- Traditional infection definitions may not adequately guide clinicians in managing patients at risk of sepsis.
Purpose of the Study:
- To highlight the limitations of solely identifying and quantifying bacteria in wound assessment.
- To emphasize the importance of considering multiple factors beyond bacterial load in predicting invasive infection and sepsis.
- To underscore the need for comprehensive clinical evaluation in wound management.
Main Methods:
- Review of existing literature on wound microbiology and infection.
- Analysis of the interplay between bacterial factors, wound characteristics, and host defenses.
- Clinical observation and assessment of wound healing and infection progression.
Main Results:
- Bacterial presence in wounds does not always equate to infection or sepsis.
- Wound type (acute vs. chronic, size) influences host response to bacterial colonization.
- Host defense mechanisms play a critical role in determining the outcome of bacterial exposure.
Conclusions:
- Accurate prediction of invasive infection and sepsis requires a multifactorial approach.
- Clinicians must integrate bacterial data with wound characteristics and host immune status.
- Frequent and thorough patient and wound assessment is essential for timely intervention.
Related Concept Videos
01:20Infection
The chain begins with pathogens: bacteria, viruses, fungi, prions, or parasites such as protozoa helminths. These can be present on the skin as transient or resident flora, or they can be acquired from the environment. Identifying and treating the type of infection and...
01:26Stages of Infection
01:26Factors Affecting the Risk of Infection
The integrity and count of the white blood cells help the body resist pathogens and fight infection. When impaired, it reduces the body's resistance to pathogens. The acidic pH levels of the gastrointestinal, genitourinary tracts, and skin create...
01:26Healthcare Associated Infections I: Iatrogenic, Exogenic and Endogenic
HAIs significantly increase the cost of health care. Extended stays in healthcare institutions, increased disability, increased costs of medications, including specialized antibiotics, and prolonged recovery times add to the patient's expenses and the healthcare institution and funding bodies. Common...
01:30Reservoir of Infection
01:27Acne Infection