How are bacterial and viral STIs alike? They are caused by microscopic organisms. They can only be diagnosed with blood tests. They are not curable, only manageable. They are treated with the same medications.

They are caused by microscopic organisms.

Explanation:

Bacterial STIs are treated with antibiotics, but viral STIs are treated with antiviral medications. Only viral STIs are not curable. Depending on the infection or the stage of infection, it can be diagnosed by a physical examination, a saliva test, or a blood test.