Question
| A. | It is due to sulphaemoglobin pigment |
| B. |
Develops within 12 Hrs |
| C. |
It is non bacterial |
| D. |
It is associated with lightning case |
|
Correct Answer » A Explanation |
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The image shows greenish-black branching discoloration along the superficial veins — a classic finding known as “marbling” (or vascular marbling), seen during putrefaction in postmortem bodies.
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Marbling refers to greenish-black discoloration that follows the course of superficial veins, producing a lace-like or marbled pattern.
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Caused by the spread of anaerobic bacteria (mainly Clostridium perfringens) through the blood vessels.
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These bacteria produce hydrogen sulfide, which reacts with hemoglobin to form sulfhemoglobin, giving the dark color.
Timing of Appearance:
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Begins around 12 hours after death, usually seen earlier in warm climates.
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More pronounced by 24–36 hours, especially over the abdomen and limbs.
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Considered an early sign of putrefaction.
Significance:
– Useful in estimating the postmortem interval (PMI).
– Provides clues about body position and time since death.
Other Postmortem Changes:
– Rigor mortis: Stiffening of muscles after death.
– Algor mortis: Cooling of the body postmortem.
– Livor mortis: Pooling of blood in dependent areas of the body.
Postmortem Marbling
| Feature | Description |
|---|---|
| Appearance | Greenish-black vein-like pattern on skin |
| Cause | Bacterial breakdown ofhemoglobinin vessels |
| Bacteria Involved | Clostridium perfringens (putrefactive bacteria) |
| Time of Onset | Around 12 hours postmortem |
| Significance | Early sign of putrefaction |