Islamabad : Pakistan continues to witness an unabated spread of dengue fever cases amid an ongoing outbreak triggered by the devastating monsoon floods across the country. A total of 323 new cases of dengue fever were reported across Sindh in the last 24 hours, the provincial health department said.The worst-hit area was Karachi, the provincial capital, which reported 261 new cases, reports Xinhua news agency.The number of dengue infections in Sindh in September has risen to 3,917, bringing the local total to 6,486 this year.Also in the same period, 242 more people were diagnosed with the disease in Khyber Pakhtunkhwa, the provincial health department reported.The number of active cases in the province stands currently at 1,614 and the total number of patients this year has reached 5,506.Additionally, Punjab reported 229 new cases in the last 24 hours, the provincial health authorities said.The provincial capital of Lahore reported 100 new cases, followed by Rawalpindi with 86 cases.