Related Experiment Video
Updated: Aug 15, 2026

Identification of Virulence Markers of Mycobacterium abscessus for Intracellular Replication in Phagocytes
Published on: September 27, 2018
Mycobacterium-avium complex
Abstract:
The ubiquitous MAC causes disseminated disease in a large proportion of patients with AIDS. It will become an increasingly important clinical pathogen as more patients survive within the context of prolonged immunodeficiency. The primary risk factor for DMAC is CD4 < 100 mm3 and thus the institution of adequate prophylaxis will significantly reduce its presentation in advanced HIV infection. For those patients presenting with DMAC, therapy with a multiple drug regimen including a macrolide is indicated. Because of potential toxicities and interactions in these debilitated patients, however, the ideal approach is to employ a minimum number of drugs with maximal clinical activity.
Insights
Disseminated MAC (mycobacterium avium complex) is a significant threat for AIDS patients with low CD4 counts. Prophylaxis and targeted multi-drug therapy are crucial for managing this opportunistic infection.
Area of Science:
- Infectious Diseases
- Immunology
- HIV/AIDS Research
Background:
- Mycobacterium avium complex (MAC) is a common opportunistic infection in patients with Acquired Immunodeficiency Syndrome (AIDS).
- Prolonged immunodeficiency in advanced HIV infection leads to increased susceptibility to disseminated MAC (DMAC).
Purpose of the Study:
- To highlight the growing clinical importance of MAC as an opportunistic pathogen in the context of advanced HIV.
- To emphasize the role of CD4 T-cell counts in DMAC risk and the need for prophylaxis.
- To outline current therapeutic strategies for DMAC in immunocompromised patients.
Main Methods:
- Literature review and synthesis of clinical data regarding MAC in AIDS patients.
- Analysis of risk factors, particularly CD4 T-cell counts.
- Evaluation of therapeutic regimens for DMAC.
Main Results:
- Disseminated MAC is prevalent in a significant proportion of AIDS patients.
- A CD4 count below 100 cells/mm³ is the primary risk factor for DMAC.
- Prophylaxis can substantially decrease DMAC incidence in advanced HIV.
- Multi-drug regimens, including macrolides, are indicated for DMAC treatment.
Conclusions:
- DMAC is an emerging clinical challenge in the growing population of long-term survivors with HIV.
- Effective prophylaxis and judicious multi-drug therapy are essential for managing DMAC.
- Minimizing drug toxicity and interactions is critical when treating debilitated patients with DMAC.
Related Concept Videos
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...
Pulmonary Tuberculosis III
The first classification is based on the development of the disease, and it includes the following categories:
Pulmonary Tuberculosis V
Latent tuberculosis infection occurs when TB bacteria are present in a person's body, but are not causing illness or symptoms. It is not contagious, and preventive treatment is crucial to avoid the progression...
Atypical Pneumonia
Cryptococcal Meningitis

