Observation: Valentin Gouvrard took tetracycline when his baby second molars were forming.

In the beef production system, tetracycline resistance predominated followed by macrolide resistance.

Twenty patients with CF had bone biopsies taken after double tetracycline labeling.

Chemically modified tetracycline 3 treatment prevented coagulopathy and protected against bowel injury.

The treatment included surgical drainage and curettage together with tetracycline and streptomycin.

Thirty days after ciprofloxacin and tetracyclin treatments, they showed improved albumin levels and nutritional states, both confirmed by results of hydrogen breath tests.