Adipocere formation in a body submerged in water for several months is the result of which biochemical process, and what is its forensic value?
- A Saponification — conversion of body fats to fatty acids and soaps by bacterial hydrogenation in moist, warm conditions; valuable for long-term PMI estimation and preservation of injury patterns ✓
- B Putrefaction — anaerobic bacterial gas production converting tissue to waxy material; valuable only for PMI estimation
- C Mummification — desiccation of tissues in dry conditions; found only in desert environments
- D Autolysis — intracellular enzyme release converting fat to a calcified matrix
Explanation
Adipocere (grave wax) forms by saponification: unsaturated body fats are hydrogenated by anaerobic bacteria (notably Clostridium spp.) to saturated fatty acids, which then react with calcium and magnesium to form calcium and magnesium soaps. This requires moist (submerged or buried in damp soil), anaerobic, warm conditions. The soap-like material is firm, grayish-white, and waxy. Forensic significance: (1) preserves the body for months to years, allowing belated examination; (2) preserves wound tracks, fractures, and other injury patterns within the converted tissue; (3) its presence and distribution can indicate PMI range and circumstances of deposition. Mummification (C) requires dryness, not moisture. Autolysis (D) does not produce a waxy product.
Reference: The Essentials of Forensic Medicine and Toxicology (Narayan Reddy), 34th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.