To structure this portion of the note, you can use another mnemonic: OLD CHARTS, as in what would you find if you looked at the patient's old chart. 1  Onset. 2  Location. 3  Duration. 4  CHaracter (sharp, dull, etc) 5  Alleviating/Aggravating factors. 6  Radiation. 7  Temporal pattern (every morning, all day, etc) 8  Symptoms associated.
Rat urine poses such a significant health risk that Abolish Pest Control recommends the use of biohazard suits, complete with gloves and respirators, when removing it. Waste removal experts focus on attics as the main nesting area, using vacuum cleaners equipped with special filters.
Technology comes to the rescue, however. Rat urine fluoresces yellow under ultraviolet light. And urine isn't the only substance that glows under a black light. Porphyrin, a component of rat tears, glows bright pink or magenta under a black light as well.