Related Experiment Video
Updated: Jul 6, 2026

09:03
Growth of Mycobacterium tuberculosis Biofilms
Published on: February 15, 2012
Bacterial growth and cell division: a mycobacterial perspective
1Department of Immunology and Infectious Diseases, Harvard School of Public Health, Boston, Massachusetts 02115, USA.
Microbiology and Molecular Biology Reviews : MMBR
|March 7, 2008
Summary
Mycobacterium tuberculosis and Mycobacterium leprae control cell division to survive and cause disease. Their unique cell walls present challenges, requiring specialized mechanisms for division and drug resistance.
Area of Science:
- Microbiology
- Cell Biology
Background:
- Mycobacterium tuberculosis and Mycobacterium leprae cause tuberculosis and leprosy.
- Mycobacterium tuberculosis can remain dormant for decades, highlighting the importance of cell division control.
- Mycobacterial cell walls are complex and impermeable, contributing to drug resistance.
Purpose of the Study:
- To discuss the challenges and mechanisms of cell division in mycobacteria.
- To explore how mycobacteria maintain cell architecture and integrity during division.
- To examine the regulation of mycobacterial cell division in response to environmental stimuli.
Main Methods:
- Review of existing literature on mycobacterial cell division.
- Extrapolation of data from Gram-negative and GC-rich Gram-positive bacteria.
- Analysis of specialized mechanisms for cell wall synthesis and division.
Main Results:
- Mycobacteria possess unique cell wall structures requiring specialized division mechanisms.
- Coordination of cell wall synthesis and degradation is crucial for division integrity.
- Environmental stimuli regulate mycobacterial cell division.
Conclusions:
- Understanding mycobacterial cell division is key to combating tuberculosis and leprosy.
- Specialized mechanisms are essential for mycobacterial cell division due to their complex cell walls.
- Further research, potentially extrapolating from related bacteria, is needed to fully elucidate these processes.
Related Concept Videos
Bacterial Phylum Actinobacteria
Coryneform bacteria are gram-positive, aerobic, nonmotile rods that exhibit irregular, club-shaped, or V-shaped arrangements. Their V-shape results from snapping division, where the inner cell wall layer forms the cross-wall, while the outer layer remains intact until it ruptures on one side, causing the daughter cells to bend away.The primary genera are Corynebacterium and Arthrobacter. Corynebacterium includes diverse species, ranging from saprophytes to pathogens like Corynebacterium...
Bacterial Growth Curve
The bacterial growth curve is a fundamental concept in microbiology that describes the dynamics of bacterial population growth in a closed system with controlled environmental conditions, such as temperature and nutrient availability. This curve is divided into four distinct phases: lag, log (exponential), stationary, and death phases, each reflecting a unique stage of bacterial adaptation and growth. During the lag phase, bacteria acclimate to their surroundings by synthesizing essential...
Exponential Growth
Bacterial populations exhibit exponential growth when conditions such as nutrient availability and temperature are favorable. In this phase, cells reproduce through binary fission, where each cell divides into two identical daughter cells. This process causes the population to double at regular intervals, resulting in a growth rate that is directly proportional to the current number of cells. As the population increases, the number of new cells formed during each generation also grows, creating...
Defense Against Bacterial Pathogens
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
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...
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...
Tuberculosis
Tuberculosis (TB) remains a significant global health concern, primarily targeting the lungs and spreading through airborne transmission. Infection begins when aerosolized droplet nuclei, expelled by an individual with active TB, are inhaled by another person. These microscopic particles carry Mycobacterium tuberculosis, the causative agent of TB. Upon reaching the alveoli, the bacilli are engulfed by alveolar macrophages. However, due to their specialized lipid-rich cell wall, these pathogens...
Pulmonary Tuberculosis II
Tuberculosis, or TB, is a bacterial infectious disease caused by Mycobacterium tuberculosis. While its primary impact is on the lungs, leading to pulmonary tuberculosis, it can also affect various other organs, a condition referred to as extrapulmonary tuberculosis.
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...
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...

