Kolkata: The number of fresh dengue cases in a single week in Bidhannagar Municipal Corporation area has further slid but was still above the 100 mark. Civic officials said 107 freshdengue cases have been reported last week. Number of dengue cases in a single week came below 200 from the first week of November when 199 cases were reported. Last year, there were 331 dengue cases in November, but this year 455 dengue cases have been recorded till the third week of November.tnn