Dr. Katie Hennessy

Katie Hennessy

Habronemiasis (summer sores)

SUMMER SORE is a common term for a skin wound (dermatitis) caused by the Habronema worm larvae. The adult Habronema live and lay eggs in the stomach of infected horses. Once the eggs hatch, the larvae are then passed into the manure of the horse, where they are ingested by fly maggots. Once the maggots

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Katie Hennessy

Equine white line disease

WHITE LINE DISEASE (seedy toe, hoof wall disease) is a common disease seen in the equine foot that may or may not result in lameness. This disease occurs with separation of the hoof wall from the underlying tissue and then colonization with bacteria. Separation is caused by environmental conditions, mineral toxicity or mechanical stresses on

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Katie Hennessy

Equine protozoal myeloencephalitis

EQUINE PROTOZOAL myeloencephalitis (EPM) is a neurological disease in horses and is caused by the protozoan Sarcocystis neurona, which affects the brain and spinal cord. The protozoan requires two hosts to complete its life cycle, a definitive and an intermediate host. Opossums are the definitive hosts and cats, raccoons, armadillos, and skunks are intermediate hosts.

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Katie Hennessy

Pigeon fever: Most common in the West, it can affect Florida horses

PIGEON FEVER is a common name for an infection caused by the bacterium Corynebacterium pseudotuberculosis. The reason it is called pigeon fever is that the bacteria tends to localize and form abscesses in the pectoral region and ventral abdomen of the horse, giving the horse a “pigeon-breast” appearance. This bacterium lives and multiplies in dry

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Katie Hennessy

Be prepared for equine emergencies

YOUR HORSE is an important member of your family, so it is important to be prepared in case of an emergency. Emergencies are stressful, emotional, and can happen at any time. Being prepared and ready to handle different emergency situations can improve the outcome of the emergency. Make sure to have important phone numbers (i.e.,

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