Glycogen branching enzyme disease (GBED) is carried on a recessive gene and causes foals to be born dead or extremely weak.
The plant disease might involve individual kernels or clusters of kernels on an ear of corn. Discoloration of kernels is usually the first visible sign, with kernel caps becoming salmon-pink or a light shade of red. Once the signs develop, the pathogen may continue to spread on the ear, knitting a cotton-like growth that might eventually cover the entire ear. Complete coverage is likely to occur if moisture was trapped beneath the husk. Not all infected kernels, however, show signs.
This result indicates that laminitis flare-ups may be triggered by allergens and also by reactions to ingredients in common vaccines.
Horse owners are often quick to lay blame on an allergy when a horse begins to cough or wheeze. An allergy is any hypersensitivity to a specific stimulus, even a stimulus that a horse has been previously exposed to without detriment. This hypersensitivity results in self-injury. The degree of debilitation caused by an allergy depends on the severity of the reaction and the number of body systems involved.
Recurrent exertional rhabdomyolysis, also called tying-up syndrome, refers to the severe muscle cramping and cellular damage seen in some exercising horses. Various forms of tying-up affect horses of several breeds and are caused by different metabolic processes.
These terms are common names for conditions that restrict airflow in the laryngeal area. In both cases, noisy breathing and exercise intolerance are probably the first signs that will alert an owner or trainer to the problem.
Some foals don't seem to recognize the mare and are unable to nurse. They may wander around the stall, getting stuck in a corner and being unable to find their way out. Others slip into frequent periods of deep sleep, have seizures, or make strange "barking" vocalizations.
At the present time there is no evidence that horses are susceptible to any prion diseases, and transmission to equines from infected cows, deer, or other species has not been noted. Some scientists, however, warn that many mammals are susceptible, at least under laboratory conditions, where infection has been experimentally introduced into pigs, monkeys, and other species.
Lyme disease can affect horses in various ways. Signs may be subtle and may mimic those of neurologic disorders. Lameness that seems to shift from joint to joint, sensitivity to touch, irritability, behavioral changes, low energy level, weight loss, eye inflammation, and pain in the muscles or joints are some of the more common indications.
Equine grass sickness (EGS) is a mysterious and often-fatal disease that strikes down healthy young horses as they graze. Most cases have occurred in England, Wales, and Scotland, but EGS has also been seen in Europeand South America. Mal seco, an equine disease reported in South Africa, appears to be identical.
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