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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...
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...
Diphtheria01:28

Diphtheria

Diphtheria is an acute, toxin-mediated infectious disease that primarily affects the upper respiratory tract. It is caused by Corynebacterium diphtheriae, a Gram-positive, pleomorphic rod that lacks spore-forming capability and exhibits a characteristic club-shaped morphology under microscopic examination. While C. diphtheriae can asymptomatically colonize mucosal surfaces, clinical disease manifests only when the bacterial strain is lysogenized by a specific β-corynephage. This phage...
Pulmonary Tuberculosis I01:29

Pulmonary Tuberculosis I

Tuberculosis, often called TB, is a contagious illness primarily caused by Mycobacterium tuberculosis. It mainly affects the lung parenchyma but can also impact other body parts.
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 IV01:26

Pulmonary Tuberculosis IV

Tuberculosis, more commonly referred to as TB, is an infectious disease stemming from Mycobacterium tuberculosis. While it primarily impacts the lungs, TB can also affect other body areas. Given its severity and global impact, timely and accurate diagnosis is crucial for controlling its spread and improving patient outcomes.
Several diagnostic approaches are used to detect TB. The conventional method is the Tuberculin Skin Test (TST), also known as the Mantoux test. However, this method has...
Pulmonary Tuberculosis V01:28

Pulmonary 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...

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Related Experiment Video

Updated: May 29, 2026

Transcanalicular Diode Laser-assisted Dacryocystorhinostomy for the Treatment of Primary Acquired Nasolacrimal Duct Obstruction
07:30

Transcanalicular Diode Laser-assisted Dacryocystorhinostomy for the Treatment of Primary Acquired Nasolacrimal Duct Obstruction

Published on: October 13, 2017

Tuberculous dacryoadenitis in a child.

C Chakraborti1, R Biswas, M Mondal

  • 1Department of Ophthalmology, Calcutta National Medical College and Hospital, Kolkata, India. cchakoptha@yahoo.com

Nepalese Journal of Ophthalmology : a Biannual Peer-Reviewed Academic Journal of the Nepal Ophthalmic Society : NEPJOPH
|August 31, 2011
PubMed
Summary
This summary is machine-generated.

Orbital tuberculosis is rare, but this case highlights a discharging sinus from a lacrimal gland mass in an Indian girl. Prompt diagnosis and tuberculous chemotherapy are crucial for managing this rare orbital infection.

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Intradermal Inoculation of Mycobacterium avium in the Mouse Ear
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Intradermal Inoculation of Mycobacterium avium in the Mouse Ear

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Transcanalicular Diode Laser-assisted Dacryocystorhinostomy for the Treatment of Primary Acquired Nasolacrimal Duct Obstruction
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Published on: October 13, 2017

Intradermal Inoculation of Mycobacterium avium in the Mouse Ear
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Area of Science:

  • Ophthalmology
  • Infectious Diseases
  • Pathology

Background:

  • Orbital tuberculosis is an uncommon condition, even in regions where tuberculosis is prevalent.
  • It can affect orbital soft tissues, lacrimal glands, or the bony orbit.

Observation:

  • A case of a young Indian girl with a slowly progressing superotemporal orbital mass is presented.
  • The mass evolved into an abscess, spontaneously ruptured, and formed a discharging sinus.
  • Initial microbiological stains were inconclusive, but a strongly positive tuberculin skin test was noted.

Findings:

  • Incisional biopsy revealed caseating granuloma and Langhan's giant cells, indicative of tuberculosis.
  • The patient demonstrated a positive response to antitubercular chemotherapy.

Implications:

  • Tuberculous dacryoadenitis is a rare but significant manifestation of tuberculosis.
  • The possibility of tuberculosis should be considered in cases of slowly enlarging lacrimal gland masses, particularly in endemic areas.