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How is chlamydia tested, by blood or urine? - chlamydia blood test

A friend to a test and the doctor suggested a test for STD. Only blood. The result shows that chlamydia. I read that some contribution is chlamydia tested by a urine sample. It can also be tested blood sample? If not, it means that the clinic was fraud. I think that because Chlamydia is the most common sexually transmitted diseases, they just say that the patient chlamydia so that they can sell them, has to take the drug mean more revenue for the clinic. Am I right?