Question:
What type of tissue changes develops when host animal is exposed to Clostridium perfringens infection?
What type of tissue changes develops when host animal is exposed to Clostridium perfringens infection?
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*Clostridium perfringens* is synonymous with gas gangrene.
Whenever you see *C. perfringens* in a histotoxic context, look for "gas formation/crepitation" combined with "myonecrosis" (muscle necrosis).
Whenever you see *C. perfringens* in a histotoxic context, look for "gas formation/crepitation" combined with "myonecrosis" (muscle necrosis).
Updated On: Jul 23, 2026
- Numerous abscesses
- Epidermolysis with necrosis of subcutaneous tissue
- Shock
- Gas formation with necrosis of muscle and connective tissue
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
*Clostridium perfringens* is an anaerobic, spore-forming, Gram-positive bacillus found in soil and the intestinal tract.
It is a highly destructive histotoxic pathogen.
Under anaerobic conditions (such as deep, ischemic tissue wounds), it multiplies rapidly and releases potent exotoxins that cause severe, necrotizing tissue lesions.
Step 2: Detailed Explanation:
The tissue pathology caused by *Clostridium perfringens* is primarily driven by its major histotoxic toxins.
The most important is the alpha-toxin, which is a phospholipase C (lecthinase) that hydrolyzes phospholipids in cell membranes.
This leads to the lysis of erythrocytes, platelets, and muscle cells (myonecrosis).
Other toxins, like collagenase and hyaluronidase, degrade connective tissue ground substance, allowing the infection to spread rapidly.
In deep, anaerobic wounds (such as puncture wounds or crush injuries), the bacteria utilize tissue glycogen and carbohydrates as substrates for anaerobic fermentation.
This fermentation process produces large amounts of hydrogen and carbon dioxide gases.
The accumulating gas forms bubbles that dissect along fascial planes and muscle bundles, causing swelling and a crackling sensation upon palpation (crepitus or emphysema).
The combination of vascular damage, anoxia, and direct toxin-mediated cell lysis leads to coagulation necrosis of the skeletal muscle and adjacent connective tissues.
This clinical condition is known as clostridial myonecrosis or gas gangrene.
Therefore, the characteristic tissue changes of *Clostridium perfringens* infection are gas formation with necrosis of muscle and connective tissue.
Step 3: Final Answer:
The correct option is (D).
*Clostridium perfringens* is an anaerobic, spore-forming, Gram-positive bacillus found in soil and the intestinal tract.
It is a highly destructive histotoxic pathogen.
Under anaerobic conditions (such as deep, ischemic tissue wounds), it multiplies rapidly and releases potent exotoxins that cause severe, necrotizing tissue lesions.
Step 2: Detailed Explanation:
The tissue pathology caused by *Clostridium perfringens* is primarily driven by its major histotoxic toxins.
The most important is the alpha-toxin, which is a phospholipase C (lecthinase) that hydrolyzes phospholipids in cell membranes.
This leads to the lysis of erythrocytes, platelets, and muscle cells (myonecrosis).
Other toxins, like collagenase and hyaluronidase, degrade connective tissue ground substance, allowing the infection to spread rapidly.
In deep, anaerobic wounds (such as puncture wounds or crush injuries), the bacteria utilize tissue glycogen and carbohydrates as substrates for anaerobic fermentation.
This fermentation process produces large amounts of hydrogen and carbon dioxide gases.
The accumulating gas forms bubbles that dissect along fascial planes and muscle bundles, causing swelling and a crackling sensation upon palpation (crepitus or emphysema).
The combination of vascular damage, anoxia, and direct toxin-mediated cell lysis leads to coagulation necrosis of the skeletal muscle and adjacent connective tissues.
This clinical condition is known as clostridial myonecrosis or gas gangrene.
Therefore, the characteristic tissue changes of *Clostridium perfringens* infection are gas formation with necrosis of muscle and connective tissue.
Step 3: Final Answer:
The correct option is (D).
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