Home > Our Offices > Departments > Veterinary Science > Extension > Questions About Eastern Equine Encephalitis and Horses [Image: Questions Regarding Eastern Equine Encephalitis and Horses] Eastern equine encephalitis (EEE) and western equine encephalitis (WEE) virus infections occur in horses and other equids. Where does EEE come from? What's the best way to protect a horse? Find these answers and more. Watch For Cattle Emphysema In Late Summer [Image: Perilla Mint] Herd outbreaks of acute respiratory disease in cattle may occur. Causes include ingestion of perilla mint, mold damaged sweet potatoes, sudden intake of immature summer forages high in the amino acid tryptophan. Poisonous Plants for Louisiana Livestock in the Fall [Image: Senna occidentalis] Images of major poisonous plants are presented to assist livestock owners with plant recognition. Toxic effects are also mentioned. Health Conditions Common to Show Animals [Image: Cover view of PDF] A brief review of the common health problems that can afflict cattle, sheep and pigs. Symptoms and treatments are described, but this is not meant to be a treatment guide. (PDF Format Only)  more articles... Photosensitization in Cattle and Horses Photosensitization, also known as photodermatitis, occurs when the liver is unable to excrete a metabolite of chlorophyll from forages the animal has eaten. The metabolite accumulates in the skin and is activated by sunlight. The reaction yields free radicals that "burn" the skin. Horses Poisoned by Showy Crotalaria [Image: Showy crotalaria] Showy crotalaria is a significant toxic plant in Louisiana. It contains alkaloids that cause liver damage in horses and livestock. The seeds may remain viable in undisturbed soil for 60 years or longer. Keeping Show Animals Healthy [Image: girl brushing show pig] This article discusses common diseases in show animals and how to prevent them.