However , a major risk factor for development of the disease is occupational exposure , a disproportionate number of working - aged males are affected .
There is no evidence of leptospirosis having any effect on sexual and age - related differences .
A major risk factor for development of the disease is occupational exposure , a disproportionate number of working - aged males are affected .
There is no evidence of leptospirosis having any effect on sexual and age - related differences .