"All the patients are from Darbhanga only as other villages are not connected properly to the district and the figures (about 20 patients daily) are from here only," Suman Kumari, a nurse at the paediatric department of Darbhanga Medical College Hospital said.
Harried parents of the children seen lined up in the hospital corridor complained apathy of the officials towards the spread of the disease.
"My child has diarrhoea and he has been given six bottles of glucose. He has been vomiting. Doctor asked me to bring medicines from outside," said Mohammad Rashid, father of a patient.
About 2.5 million people have been displaced or stranded in floods over the past fortnight in 20 districts in Bihar.
Darbhanga and Motihari are the worst affected districts.
The rain-related death toll in the state is reported to be 274.
Floods have damaged standing crops worth rupees 2.68 billion, houses worth rupees 1.05 billion and public property worth 430 million.
The latest bout of monsoon flooding, which began about three weeks ago, has affected about 30 million people across India, in the worst floods in decades.