I.- For the purposes of this article, the following definitions shall apply
1° “Preventive treatment”: any individual or collective prophylactic treatment applied to healthy animals exposed to a risk factor for an infectious disease in question;
2° “Metaphylactic treatment”: any treatment applied to clinically sick animals and to other animals in the same group which, although clinically healthy, present a high probability of infection due to their close contact with sick animals;
3° “Curative treatment”: any treatment, individual or collective, only of animals presenting the symptoms of a disease.
II -The prescription of a veterinary medicinal product containing one or more of the critically important antibiotic substances mentioned in article L. 5144-1-1 is reserved for metaphylactic and curative treatments.
Veterinarians will only prescribe metaphylactic treatment with a medicinal product containing one or more of these substances if they suspect a disease with a high mortality or morbidity rate for which, in the absence of early treatment, rapid spread to all animals is inevitable.
The veterinarian may only prescribe curative or metaphylactic treatment with a medicinal product containing one or more of these substances if there is no medicinal product not containing these substances which is sufficiently effective or suitable to treat the disease diagnosed.
III – For medicinal products containing one or more of the critically important antibiotic substances mentioned in II, the prescription may only prescribe a course of treatment lasting no longer than one month, even if the duration indicated in the summary of product characteristics mentioned in article R. 5141-15 is longer than one month. If this period exceeds one month, this treatment may only be extended by a new prescription after a new clinical examination of the animal or batch of animals.