[genomer]

The article didn't focus solely on quins.

An example of a different class: "Researchers have shown, for example, that aminoglycoside antibiotics can cause deafness by damaging mitochondria in the hair cells of the ear."

More general statement: "They reported that antibiotics in several classes triggered oxidative stress — a build-up of reactive, oxygen-containing molecules — in mitochondria, inhibiting their function across a range of mammalian cells, as well as in mice."

I interpreted the article as saying that quins are the most obvious example of antibiotics causing harm, but one example for where they cause harm (mitochondria) is a problem shared by other antibiotics. Unfortunately there isn't a test for evaluating mitochondrial damage in the body. Since we can't test, we don't know the real extent of damage done by any antibiotic to human cells. More research is needed.