Facebook Twitter YouTube. Equine herpesvirus type 1 (EHV-1) and equine herpesvirus type 4 (EHV-4) can each infect the respiratory tract, causing disease that varies in severity from sub-clinical to severe and is characterized by fever, lethargy, anorexia, nasal discharge, and cough.
OPCON is designed in this manner to provide commanders with the requisite authority to organize their commands, delegate the appropriate level of authority, and assign tasks to subordinate commanders as necessary to accomplish the mission.
opÂ·erÂ·on. n. A unit of genetic material that functions in a coordinated manner by means of an operator, a promoter, and one or more structural genes that are transcribed together.oun. 1. operon-a segment of DNA containing adjacent genes including structural genes and an operator gene and a regulatory gene. operator gene-a gene that activates the production of messenger RNA by adjacent structural genes.