What is a first external sign of decomposition of a dead body-e
Decomposition of liver and intestine
Greenish discoloration over right iliac fossa
Greenish discoloration over dependent parts
Blood stained froth from mouth
Ans. is 'b' i.e., Greenish discolouration over right iliac fossa Decomposition of bodyo Produced mainly by the action of bacterial enzymes (lecithinase- Cl welchii)o Anaerobic organism (from bowels)o Causes marked hemolysis & liquefaction in blood vessels & tissue spaces, producing the following changes:Color changes- greenish discolouration over right iliac fossa (sulphamethhemoglobin) - Over cecum (12-18hrs) - spreads over entire abdomen- genitalia- chest- neck- face - arms -legs.Superficial veins over the roots of the limbs, thighs, sides of the abdomen, shoulder, chest & neck are stained greenish brown or purplish red, marbled appearance in 36-48 hrs.Foul smelling gases- 6-12 hours in the intestine in summers, due to reduction & breakdown of proteins & carbohydrates. Gases produced are carbon dioxide, ammonia, methane, mercaptans, and hydrogen sulfide. Gas bubbles cause crepitation & give a sponge-like feelingBlood stained froth from mouth & nostrils is called post-mortem purge Distension of body: 36-48 hrs Anus & uterus prolapse: 2-3 days Postmortum blisters, face distortion: > 3 days Nail, skull sutures, hair loss > 5daysSkin shows slippage and comes off in a glove Sc stocking fashion.Post mortum luminance due to Photobacterium fischeri bacteria & Armillaria mellea fungiLiquefaction of tissues ( colliquative putrefaction)-5-10 daysPutrefactive effusion - pleural cavity 60-100mlSkeletonization occurs in about 1 hourOrder of appearance of putrefaction - larynx, trachea> stomach, intestine> liver, spleen > brain, lungs> heart, kidney > bladder, uterus/prostate> skin, muscles, tendon> bonesHoneycomb appearance (foamy liver) seen in the liver is due to putrefactionUterus/prostate are last to putrifyEntomology of cadaver: eggs of houseflies are deposited in 6 to 12 hrs in nostrils, mouth; in 8-12 hrs, maggots are produced from eggs; 4-5 days maggots become pupae; flies are formed in 3-5 days.