CA AB1437

Prohibits sale of livestock or poultry products in California if the animals were administered medically important antimicrobials for nontherapeutic uses such as growth promotion, feed efficiency, weight gain, or disease prevention, effective January 1, 2020.

Restricts nonroutine disease control use of medically important antimicrobials to situations where significant disease risk exists, administration is necessary and brief, and applied to the fewest animals possible; producers must maintain records for five years.

Requires slaughter facilities to register with the department and annually report detailed information about medically important antimicrobial use, with the department creating a public searchable database by December 31, 2017.

Mandates that medically important antimicrobials be administered only by veterinarians for therapeutic purposes as part of a valid veterinarian-client-patient relationship, effective January 1, 2020.

Establishes civil penalties ranging from $100 to $2,000 per violation, with the department phasing in full implementation by January 1, 2020; exempts producers raising fewer than 250 livestock or 10,000 poultry annually from reporting requirements.