does tetracycline treat "E. coli ut's?

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Tetracycline isn't common these days. They make black teeth.
Tetracycline can treat urinary tract infections caused by partially sensitive E. coli. But it has a lot of harm and is not used often now. Repeated use of tetracycline for a long time may affect the development and formation of teeth, not only yellowing the teeth, but also causing enamel dysplasia (the surface of the teeth is not smooth, small depressions appear) or tooth deformities.