Kolkata: The dengue toll in West Bengal shot up to 23 on Thursday, with a woman succumbing to the virus-borne disease.

The woman, a resident of South Parganas district and a confirmed dengue patient, passed away at a private hospital during the day.

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State Director of Health Services BR Satpathy said 510 fresh cases of dengue were reported since Wednesday evening, taking the total number of infected persons this year to 5,639.