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Related Concept Videos

Pulmonary Tuberculosis II01:28

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...
Pulmonary Tuberculosis III01:31

Pulmonary Tuberculosis III

Tuberculosis (TB) is a contagious infection primarily affecting the lung parenchyma but which can also affect other body parts. TB can be classified based on disease development, presentation, and the affected anatomical site.
The first classification is based on the development of the disease, and it includes the following categories:
Rocky Mountain Spotted Fever01:26

Rocky Mountain Spotted Fever

Rocky Mountain Spotted Fever (RMSF) is a severe tick-borne illness caused by Rickettsia rickettsii, a Gram-negative, coccobacillary bacterium. This pathogen is an obligate intracellular parasite, requiring a host cell for replication. Transmission occurs through the bite of an infected tick. In the United States, the most important vectors are Dermacentor variabilis (American dog tick) and Dermacentor andersoni (Rocky Mountain wood tick), though other tick species may also serve as vectors.
Atypical Pneumonia01:14

Atypical Pneumonia

Atypical pneumonia, often caused by Mycoplasma pneumoniae, is a form of pulmonary infection that differs from the classical presentation of bacterial pneumonia in both its cause and clinical symptoms. Mycoplasma pneumoniae is a pleomorphic bacterium notable for its lack of a rigid cell wall. This structural characteristic imparts resistance to beta-lactam antibiotics and significantly influences the bacterium’s behavior within the human host.Other pathogens responsible for the disease include...
Tuberculosis01:23

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...
Diabetic Foot Ulcer01:31

Diabetic Foot Ulcer

Definition A diabetic foot ulcer (DFU) is a chronic, non-healing wound that develops in individuals with diabetes. It typically occurs on pressure-bearing areas such as the heel, metatarsal heads, or hallux, and carries a high risk of infection and amputation.Pathophysiology • The development of DFUs can be explained by four interconnected mechanisms: neuropathy, ischemia, infection, and impaired wound healing. • Neuropathy is the most common factor. Sensory neuropathy reduces pain perception,...

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Related Experiment Video

Updated: Jul 14, 2026

A CFSE-based Assay to Study the Migration of Murine Skin Dendritic Cells into Draining Lymph Nodes During Infection with Mycobacterium bovis Bacille Calmette-Guérin
07:14

A CFSE-based Assay to Study the Migration of Murine Skin Dendritic Cells into Draining Lymph Nodes During Infection with Mycobacterium bovis Bacille Calmette-Guérin

Published on: October 9, 2016

Mycobacterium ulcerans infection.

T S van der Werf1, W T van der Graaf, J W Tappero

  • 1Department of Internal Medicine, Groningen University Hospital, The Netherlands. t.s.van.der.werf@int.azg.nl

Lancet (London, England)
|September 29, 1999
PubMed
Summary

Buruli ulcer disease, caused by Mycobacterium ulcerans, is a significant health concern in tropical regions, particularly West Africa. Improved treatment, prevention, and research are urgently needed to combat this debilitating mycobacterial infection.

Keywords:
Bacterial And Fungal DiseasesDiseasesEpidemiologyExaminations And DiagnosesHealthInfectionsLaboratory Examinations And DiagnosesPublic HealthSigns And SymptomsTreatmentVaccines

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Area of Science:

  • Infectious Diseases
  • Mycobacteriology
  • Tropical Medicine

Background:

  • Buruli ulcer disease, caused by Mycobacterium ulcerans, is the third most common mycobacterial infection in immunocompetent individuals.
  • The disease is endemic in tropical rainforest regions, with a dramatic increase observed in West Africa over the past decade.
  • Transmission is suspected via skin abrasions from contact with contaminated water, soil, or vegetation.

Purpose of the Study:

  • To review the epidemiology, clinical presentation, transmission, and management of Buruli ulcer disease.
  • To highlight the significant health and economic burden imposed by the disease, especially in underprivileged populations.
  • To emphasize the need for improved control strategies, including new vaccine development.

Main Methods:

  • Review of existing literature on Buruli ulcer disease.
  • Analysis of epidemiological trends and clinical manifestations.
  • Evaluation of current treatment and prevention strategies.

Main Results:

  • Buruli ulcer disease presents as painless nodules or large ulcerative lesions, predominantly affecting children.
  • While lesions heal spontaneously, extensive scarring can lead to severe sequelae like contractures and blindness.
  • Secondary infections can cause systemic illness and death; current treatment is primarily surgical.

Conclusions:

  • Buruli ulcer disease poses a substantial health and economic challenge, particularly in West Africa.
  • BCG vaccination offers mild protection, but new vaccines targeting M. ulcerans toxins are necessary.
  • Integrated efforts in treatment, prevention, control, and research, supported by international agencies, are crucial for managing Buruli ulcer disease.