Related Experiment Video
Updated: Aug 6, 2026
07:35
Demonstrating a Multi-drug Resistant Mycobacterium tuberculosis Amplification Microarray
Published on: April 25, 2014
Drug resistance in Mycobacterium tuberculosis
Rabia Johnson1, Elizabeth M Streicher, Gail E Louw
1Division of Molecular Biology and Human Genetics, Department of Biomedical Science, Faculty of Health Science, Tygerberg, Stellenbosch University, South Africa.
Current Issues in Molecular Biology
|August 2, 2006
Summary
Drug-resistant tuberculosis (TB) is a global threat. Molecular methods aid in understanding TB drug resistance, guiding treatment and preventing transmission.
Area of Science:
- Microbiology
- Epidemiology
- Genetics
Background:
- Anti-tuberculosis drugs can inadvertently select for drug-resistant Mycobacterium tuberculosis strains.
- Drug-resistant tuberculosis (TB) is a significant global public health threat, challenging control programs worldwide.
- Molecular epidemiology has advanced the understanding of TB drug resistance patterns and outbreaks.
Purpose of the Study:
- To review current World Health Organization (WHO) guidelines for TB treatment.
- To discuss the global drug resistance problem, mechanisms of resistance to anti-TB drugs, and molecular detection methods.
- To highlight the potential of molecular techniques as adjuncts to traditional culture-based methods for rapid drug resistance screening.
Main Methods:
- Review of WHO treatment guidelines.
- Analysis of global drug resistance data.
- Description of molecular mechanisms of drug resistance.
- Evaluation of molecular methods for detecting resistance-conferring gene mutations.
Main Results:
- Drug resistance in TB is widespread and poses a threat to global TB control.
- Molecular methods have significantly improved the understanding of TB drug resistance.
- Molecular techniques show promise for rapid screening of drug resistance, complementing culture-based methods.
Conclusions:
- Molecular methods are crucial for understanding and combating drug-resistant TB.
- Rapid molecular screening can aid in timely treatment and infection control.
- Preventing transmission of drug-resistant TB strains is essential for containment, supported by mathematical modeling insights.
Related Concept Videos
01:30Development of Antibiotic Resistance
Antibiotic resistance is a major public health concern that arises when bacteria evolve mechanisms to withstand the effects of antibiotic treatments. This resistance can be intrinsic, acquired through genetic mutations, or transferred between bacteria via horizontal gene transfer. The development of antibiotic resistance poses significant challenges in treating bacterial infections and necessitates ongoing research to develop new therapeutic strategies.Intrinsic resistance occurs when bacterial...
01:25Mechanism of Antibiotic Resistance in MRSA
Antibiotic resistance in bacteria arises when microorganisms evolve the ability to withstand drugs designed to kill them or inhibit their growth, rendering once-effective treatments useless. This phenomenon, driven by genetic change and selection under antibiotic exposure, poses a profound threat to modern medicine. Mechanisms include drug-inactivating enzymes (e.g., β-lactamases), efflux pumps that eject antibiotics, mutations altering antibiotic targets, decreased drug uptake, and acquisition...
01:28Pulmonary Tuberculosis V
Medical management of tuberculosis (TB) patients involves a comprehensive approach that includes diagnosis, treatment, and monitoring. The specific strategies can vary depending on the type of tuberculosis (latent or active), the patient's overall health status, and other considerations.
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...
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...
01:31Defense 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...
01:25Clinical Significance of Antibiotic Resistance
Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within the One...
02:56Treatment Resistant Cancers
Cancer is the second leading cause of death in the United States. A cancer cell is genetically unstable and hence can mutate faster. They can also modify their microenvironment and escape immune surveillance. The difficulties in treating cancer are further compounded by the emergence of rapid resistance to anticancer drugs. The most common ways to attain resistance in cancer cells include alteration in drug transport and metabolism, modification of drug target, elevated DNA damage response, or...