Why is the smell of a dead rat dangerous? - briefly
The odor signals bacterial decomposition and can release pathogens such as «leptospira» and «hantavirus», creating a risk of infection. Inhalation or contact with contaminated aerosols may cause respiratory or systemic illness.
Why is the smell of a dead rat dangerous? - in detail
The odor released by a deceased rodent indicates advanced decomposition, during which bacteria multiply and release harmful substances.
Pathogenic microorganisms proliferate in the corpse, including Salmonella, Leptospira, Streptobacillus moniliformis and various strains of E. coli. Inhalation of aerosolized particles or contact with contaminated surfaces can transmit these agents, leading to gastroenteritis, leptospirosis, rat‑bite fever and other infections.
Decomposition generates volatile compounds such as ammonia, hydrogen sulfide, cadaverine and putrescine. These gases irritate mucous membranes, provoke respiratory distress and, at high concentrations, may cause dizziness or loss of consciousness.
Additional risks arise from:
- Parasite eggs (e.g., Trichinella) that survive in dried tissue and become airborne.
- Mycotoxins produced by fungi colonizing the carcass, which can trigger allergic reactions.
- Chemical contaminants absorbed by the animal during its life, released back into the environment upon decay.
Exposure mitigation requires immediate removal of the source, thorough ventilation of the area, and disinfection with agents effective against both bacteria and fungi. Protective equipment—gloves, masks and eye protection—reduces direct contact and inhalation of hazardous vapors.