Related Experiment Video
Updated: Aug 11, 2026

Identification of Virulence Markers of Mycobacterium abscessus for Intracellular Replication in Phagocytes
Published on: September 27, 2018
Genetic susceptibility to mycobacteria and other infectious pathogens in humans
Abstract:
Substantial evidence exists that host genes are important in determining the outcome of infection with mycobacteria and other intracellular pathogens. Geographical variation in the prevalence of malaria has facilitated the recognition of many genes important in determining interindividual variability in susceptibility to the severe forms of this infection. This success has, however, been difficult to achieve in other infectious diseases. Recently a variety of study designs including large-scale association-based population case/control studies of candidate genes, family-based linkage studies, investigation of rare individuals with exceptional mycobacterial susceptibility and comparison with mouse models of disease has enabled identification of host genes which contribute to susceptibility to mycobacterial disease. This work demonstrates that a large number of genes are probably important in susceptibility to mycobacterial pathogens and provides a model for the investigation of genetic susceptibility to other infectious diseases.
Insights
Identifying host genes is crucial for understanding mycobacterial infections. Recent studies reveal numerous genes contribute to susceptibility, offering a model for infectious disease research.
Area of Science:
- Genetics
- Immunology
- Infectious Diseases
Background:
- Host genes significantly influence outcomes of infections by mycobacteria and other intracellular pathogens.
- Genetic factors are well-established for malaria, but challenging to identify for other infectious diseases.
- Investigating host genetic contributions is vital for understanding disease susceptibility.
Purpose of the Study:
- To identify host genes contributing to susceptibility to mycobacterial diseases.
- To establish a model for investigating genetic susceptibility in infectious diseases.
Main Methods:
- Employed diverse study designs: large-scale population case/control studies of candidate genes.
- Utilized family-based linkage studies and investigated rare individuals with exceptional mycobacterial susceptibility.
- Incorporated comparative analysis with mouse models of mycobacterial disease.
Main Results:
- Identified a significant number of host genes contributing to susceptibility to mycobacterial pathogens.
- Demonstrated the feasibility of identifying genetic factors for infectious disease susceptibility through various methodologies.
Conclusions:
- A large number of host genes are likely involved in susceptibility to mycobacterial infections.
- The approaches used provide a robust model for future research into genetic susceptibility across various infectious diseases.
Related Concept Videos
Cancer Prevention
Some...
Factors 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...
Defense Against Bacterial Pathogens
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Pulmonary Tuberculosis I
Causative Organism
The primary infectious agent causing tuberculosis is Mycobacterium tuberculosis, a slow-growing, acid-fast, aerobic rod that exhibits sensitivity to heat and ultraviolet light. Instances of Mycobacterium bovis and Mycobacterium avium contributing to the development of TB infection are rare.
Mode of...
Pulmonary Tuberculosis II
Here is a detailed explanation of its pathophysiology:
Transmission: The process begins when a person inhales droplet nuclei containing M. tuberculosis. These are typically released into the air when an individual with pulmonary or...
Tuberculosis

