Animal virus genomes consist of either RNA or DNA, which may be single-stranded or double-stranded. Animal viruses may use a range of strategies to copy and use their genetic material. The virology section studies research focusing on the clinical, macro-pathological, cell and molecular biological aspects of viruses of veterinary importance. This includes studies on livestock, companion animals, equids, wild animals, fish, laboratory animals and animal models of human infections. Studies on related zoonotic and emerging viral infections are also considered. At least one major disease of each domestic animal species except sheep is caused by a herpesvirus, including such important diseases as infectious bovine rhinotracheitis, pseudorabies, and Marek's disease. However, there are several approaches to their prevention, control, and eradication. The most generally useful control measure is the use of vaccines.