New Delhi: The fluctuating day and night temperatures in the Capital are taking a toll on the health of Delhiites. Incidents of chicken pox, bacterial meningitis, upper respiratory problems and other seasonal ailments are increasingly being reported. Doctors say the OPD load has shot up by 20 to 25 per cent and warn that change in weather should be taken seriously. Doctors have reported a sharp rise in the number of chicken pox cases, especially in adults. "This season is conducive for the virus responsible for chicken pox