ELISA for detection of dengue virus-induced cytokine and its antibody.

ELISA technique has been standardized for detection of a dengue type 2 virus (DV)-induced cytokine, the cytotoxic factor (CF) and CF-specific antibodies. The performed ELISA was found to be sensitive (90.9%), specific (92.5%), accurate (91%) and reproducible and was able to detect a minimum of 7 ng/ml CF in the test samples. The technique was used to detect CF in DV inoculated mouse sera and DV-infected mouse spleen cell culture fluids. Significant utility of the test was detection of a CF-like cytokine in the sera of human cases of dengue haemorrhagic fever.