The nation's railway system -- an important mode of transportation for millions -- was also under guard, after the key north-south Beijing-Guangzhou line was disrupted by Bilis, stranding thousands of residents in train cars.Symptoms of leptospirosis are similar to those of dengue fever, such as fever with initial shivers, severe headache, abdominal pain, nausea, vomiting, loss of appetite, change in the color of skin and the whites of the eyes, muscle pain mostly in the calf area, diarrhea and a skin rash.