Although acetone occurs naturally in the environment in plants, trees, volcanic gases, forest fires, and as a product of the breakdown of body fat,  the majority of the acetone released into the environment is of industrial origin. Acetone evaporates rapidly, even from water and soil. Once in the atmosphere, it has a 22-day half-life and is degraded by UV light via photolysis (primarily into methane and ethane .  ) Consumption by microorganisms contributes to the dissipation of acetone in soil, animals, or waterways.  The LD 50 of acetone for fish is g/L of water (or about 1%) over 96 hours, and its environmental half-life in water is about 1 to 10 days. Acetone may pose a significant risk of oxygen depletion in aquatic systems due to the microbial consumption. 
Children who are on immunosuppressant drugs are more susceptible to infections than healthy children. Chicken pox and measles, for example, can have a more serious or even fatal course in children on immunosuppressant corticosteroids. In such children, or in adults who have not had these diseases, particular care should be taken to avoid exposure. If exposed, therapy with variicella zoster immune globulin (VZIG) or pooled intravenous immunoglobulin (IVIG), as appropriate, may be indicated. If chicken pox develops, treatment with antiviral agents may be considered.
2. Fosfomycin (PO)
Bactericidal agent that is excreted into the urine and inhibits cell wall synthesis by interfering with peptidoglycan synthesis.
Spectrum: Broad spectrum vs Gram positive including MRSA, VRE; Gram negative including Pseudomonas and some ESBL’s .
Used for: Uncomplicated urinary tract infections in women, especially in those with history of resistant bugs. Given as a one-time mega-dose of 3 g (excreted into urine and achieves high levels there for several days. Sometimes used for complicated UTI’s in males with resistant pathogens (3 g PO q3 days x several doses), although this is an off-label use.