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Related Concept Videos

Cellular Injury IV: Necrosis01:16

Cellular Injury IV: Necrosis

Necrosis is a form of irreversible cell death caused by severe injury such as ischemia, toxins, or trauma. Unlike programmed cell death, it is an uncontrolled, pathological process that typically provokes inflammation in surrounding tissues.Pathophysiologic ChangesNecrosis begins when cells sustain critical damage, leading to swelling of organelles, particularly mitochondria, and rapid ATP depletion. As energy levels decline, membrane ion pumps fail, leading to calcium influx and eventually,...
Necrosis01:16

Necrosis

Necrosis is considered as an “accidental” or unexpected form of cell death that ends in cell lysis. The first noticeable mention of “necrosis” was in 1859 when Rudolf Virchow used this term to describe advanced tissue breakdown in his compilation titled “Cell Pathology”.
Morphological Manifestations of Necrosis
Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become anucleated and die, but their...
Staphylococcal Skin Infections01:29

Staphylococcal Skin Infections

Staphylococcus aureus is a Gram-positive coccus that resides harmlessly on the skin and mucous membranes of healthy individuals. When the skin barrier is breached, it can shift from a commensal to an opportunistic pathogen. This transition is facilitated by surface adhesins, such as clumping factor B and S. aureus surface protein G (SasG), which bind to structural proteins, including loricrin and cytokeratin, in the damaged epidermis. Protein A, another key factor, binds the Fc region of...
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.
Tetanus01:29

Tetanus

Tetanus is a life-threatening neurological disorder characterized by persistent muscle contractions and spastic paralysis. It is caused by Clostridium tetani, a motile, Gram-positive, rod-shaped, obligate anaerobe. These bacteria produce terminal endospores, giving them a distinctive “lollipop” or “tennis-racket” appearance. They thrive in anaerobic environments, such as those found in deep puncture wounds.Once introduced into the body, the spores germinate into vegetative cells. These cells...
Inhalation Anthrax01:25

Inhalation Anthrax

Anthrax is a zoonotic disease caused by Bacillus anthracis, a Gram-positive, spore-forming bacterium. It primarily affects herbivorous animals but can be transmitted to humans through skin contact, ingestion, or inhalation of spores.Cutaneous anthrax, the most common form, typically results from direct contact with bacterial spores through skin abrasions and is generally less severe. Gastrointestinal anthrax results from eating undercooked or contaminated meat. It affects the mouth, throat, or...

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Related Experiment Videos

Necrotizing fasciitis.

Joseph M Bellapianta1, Karin Ljungquist, Ellis Tobin

  • 1Albany Medical Center, Albany, NY, USA.

The Journal of the American Academy of Orthopaedic Surgeons
|March 7, 2009
PubMed
Summary
This summary is machine-generated.

Necrotizing fasciitis is a severe bacterial infection causing rapid tissue death. Prompt surgical intervention and antibiotics are critical for survival in this life-threatening condition.

Related Experiment Videos

Area of Science:

  • Infectious Diseases
  • Surgical Pathology

Background:

  • Necrotizing fasciitis is a rare, aggressive soft-tissue infection.
  • It involves rapid inflammation and necrosis of fascial planes.
  • Infection often follows minor trauma and can be caused by virulent bacteria like group A Streptococcus.

Purpose of the Study:

  • To highlight the critical importance of early diagnosis and aggressive management of necrotizing fasciitis.
  • To inform orthopaedic surgeons about the presentation and treatment of this condition.

Main Methods:

  • Review of clinical presentation and management strategies for necrotizing fasciitis.
  • Emphasis on diagnostic challenges and the critical role of surgical intervention.

Main Results:

  • Necrotizing fasciitis is frequently misdiagnosed initially.
  • Mortality is strongly correlated with the time to surgical débridement.
  • Early recognition and intervention are paramount.

Conclusions:

  • A high index of clinical suspicion is essential for prompt diagnosis.
  • Treatment requires timely diagnosis, broad-spectrum antibiotics, and aggressive surgical débridement.
  • Effective management can avert fatal outcomes.