Which one of the following techniques does not serve the purpose of early diagnosis of a disease for its early treatment?
- Serum and Urine analysis
- Polymerase Chain Reaction (PCR) technique
- Enzyme Linked Immuno-Sorbent Assay (ELISA) technique
- Recombinant DNA Technology
Answer
(1) Serum and Urine analysis
Solution
Early diagnosis is not possible by conventional methods such as serum and urine analysis, because the pathogen is detected only after the symptoms appear (when its concentration is already high).
Recombinant DNA technology, PCR and ELISA allow very early detection of a disease.
Answer: (1)