Bb can survive in frozen milk, but is killed during pasteurization. Horses Infected horses generally do not have a fever, but may have lame or stiff joints, laminitis, depression, or refuse to eat. This bacterial infection may be a cause of moon blindness or loss of vision. There have been reports of spontaneous abortion and encephalitis in horses infected with Bb . Neurologic signs include head tilt, difficulty swallowing, or aimless wandering.
Transplacental transmission occurs.
Colts born to infected mares have displayed birth defects. Many horses may be infected with the spirochete, but display no symptoms. Sprays and dips containing permethrins and pyrethrins kill ticks on dogs, cats, and horses. Precautions should be taken when applying insecticides as some animals may be sensitive to the chemicals. Follow the manufacturer's instructions.