A total of 55 cases were reported in Delhi till September 13, the report by South Delhi Municipal Corporation said.
While figures for various corporations in Delhi are -- 9 (North Corporation), 34 (South Corporation) and 9 (East Corporation), 12 cases were reported from regions in Delhi outside the jurisdiction of the three municipal corporations and 11 from neighbouring states, the report said.
Dengue mosquitoes were found breeding at various institutions so far this year, including six cases at Lok Nayak Jaiprakash Hospital (LNJP) and three at the the headquarters of the North Delhi Municipal Corporation itself.
In a recent report released by the North Delhi Municipal Corporation, DDA and Delhi Technical University (DTU) and DTC depot were among several institutions in the national capital that have been penalised for failing to check breeding of dengue mosquitoes on their premises.
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The decline this year has been attributed to delayed rains and the preventive drive undertaken by the civic bodies much before the onset of monsoon.
Apart from that 48 cases of malaria have also been recorded in the city till September 20, with 17 of them being in the month of September alone, it said.
Civic bodies are continuing with the preventive measures like fumigation, checking of breeding areas, and awareness campaigns to control dengue menace.
Over 8,900 prosecutions were also launched for the same period.