Hi...., your daughter have developed.food poisoning.... Food poisoning is the the range of illnesses caused by eating or drinking contaminated food or drink.... Give plenty of water and oral rehydration salts... Most cases of food poisoning do not require medical attention. But contact pediatrician if: symptoms persists for more than 3 days or are very severe. . not able to keep fluids down for more than a day.... symptoms include blood or mucus in the vomit or diarrhoea....