Anaplasmosis Management

New Label Brings Options for Big Worry

Victoria G Myers
By  Victoria G. Myers , Progressive Farmer Senior Editor
Conditional approval of Baytril 100-CA1 by the FDA for treatment of clinical cases of anaplasmosis, gives producers and veterinarians another option for control and management of this blood-borne disease. (PF photos by Dan Miller)

When cattle producers realized the Veterinary Feed Directive (VFD) meant they would no longer be able to buy medicated, free-choice mineral to control anaplasmosis in herds, worry set in for many who commonly used the practice. For some, that worry turned into losses, as the blood-borne illness spread, leading to aborted calves, and in the most severe cases death of infected animals.

A new treatment option, Baytril 100-CA1 Injectable Solution (enrofloxacin), has been granted conditional approval by the FDA for treatment of clinical cases of anaplasmosis in cattle. The product is expected to be available for this use beginning in May.

The product label will allow use on all classes of beef cattle except for: calves under 2 months of age and breeding beef bulls. Also, cattle for slaughter for human consumption, require a 28-day withdrawal time from the last treatment. Additional limitations apply for the dairy industry. For specifics see the product label at

Anaplasmosis can be spread by needles, ear taggers, ticks, and biting flies. It causes severe anemia, to the point of death, and has been found in beef cattle in 48 of 50 U.S. states.

Cattle can be carriers of anaplasmosis, without ever showing signs. Once infected they are carriers for life. Herds can essentially have a developed immunity, but new animals without that immunity brought in can quickly become infected.

Visible signs of anaplasmosis may include weakness, lagging behind the rest of the herd, not eating or drinking, aggression, abortions, weight loss and labored breathing.

Treatments have included tetracycline antimicrobials, oxytetracycline or chlortetracycline medicated feed (CTC). With the conditional approval of Baytril 100-CA1, an option exists now for a single-dose treatment, administered by subcutaneous injection. This is not a preventative, but to treat clinical cases of anaplasmosis.

(AG/ SK)

Victoria Myers