Enlist Constituents of puterifying mass
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The library doesn't contain forensic pathology content covering putrefaction in detail. I'll answer from established medical/forensic knowledge.
Constituents of a Putrefying Mass
Putrefaction is the decomposition of organic (especially proteinaceous) matter by microorganisms, resulting in characteristic gases, liquids, and chemical by-products.
1. Gases Produced
| Gas | Source |
|---|---|
| Hydrogen sulfide (H₂S) | Bacterial reduction of sulfur-containing amino acids (cysteine, methionine) — responsible for the foul odor |
| Ammonia (NH₃) | Deamination of amino acids and breakdown of urea |
| Carbon dioxide (CO₂) | Aerobic and anaerobic bacterial metabolism |
| Methane (CH₄) | Methanogenic bacterial activity |
| Hydrogen (H₂) | Fermentative anaerobic bacteria |
| Phosphine (PH₃) | Decomposition of phosphorus-containing organic compounds |
| Mercaptans (thiols) | Degradation of sulfur amino acids — also contribute to odor |
2. Nitrogenous Compounds
- Putrescine (1,4-diaminobutane) — from decarboxylation of ornithine
- Cadaverine (1,5-diaminopentane) — from decarboxylation of lysine
- Indole & Skatole — from tryptophan degradation; major contributors to the odor of feces and putrefaction
- Ammonia — from deamination reactions
3. Fatty Acid Derivatives (Adipocere formation)
- Butyric acid — characteristic rancid smell
- Propionic acid
- Adipic acid
- Oleic, palmitic, stearic acids (saponified fats forming adipocere/grave wax)
4. Sulfur Compounds
- Hydrogen sulfide — reacts with hemoglobin iron to form iron sulfide, causing the characteristic greenish-black discoloration of putrefying tissue
- Dimethyl sulfide
- Methyl mercaptan
5. Liquids / Fluids
- Purge fluid — dark, foul-smelling fluid from body orifices, composed of hemolyzed blood, liquefied soft tissue, and bacterial metabolites
- Water — from hydrolysis of macromolecules
6. Microbial Agents Driving Putrefaction
- Clostridium spp. (anaerobic)
- Bacteroides spp.
- Proteus spp.
- Pseudomonas spp.
- Endogenous gut flora spread post-mortem via the portal system
7. Chromogenic Products
- Iron sulfide (FeS) — greenish-black staining of skin (visible earliest over the right iliac fossa, where the cecum lies)
- Carboxyhemoglobin / sulfhemoglobin derivatives
Key Points for Forensic/Pathology Context
- Putrefaction begins internally (gut bacteria) and spreads externally
- The green discoloration of the right iliac fossa is the earliest external sign
- Bloating results from gas accumulation in body cavities
- Marbling (visible superficial veins) is due to hemolysis and bacterial gas tracking along vessels
- Skin slippage occurs due to separation of epidermis from dermis by subcutaneous gas and fluid
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