GC: adj, n

S: http://www.cdc.gov/ncidod/dvbid/westnile/resources/wnv-guidelines-apr-2001.pdf (p. 5) (last access: 22 January 2013); http://www.medicinenet.com/script/main/art.asp?articlekey=14877 (last access: 6 September 2015).

N: 1. epizootic (n.): animal equivalent of epidemic, 1748, from French épizootique, from épizootie, irregularly formed from Greek epi (see epi-) + zoon (see zoo-).
2. French épizootique, from épizootie such an outbreak, from épi- (as in épidemie epidemic) + Greek zōiotēs animal nature, from zōē life. First Known Use: 1748.
3. epizootic (n.): an outbreak of disease affecting many animals of one kind at the same time; also : the disease itself.
4. epizootic adjective; epizootically adverb.

S: 1. http://www.etymonline.com/index.php?allowed_in_frame=0&search=epizootic&searchmode=none (last access: 3 September 2014): 2, 3 & 4. MW – http://www.merriam-webster.com/dictionary/epizootic (last access: 3 September 2014).

SYN: epizootic disease

S: EncBrit – http://global.britannica.com/science/epizootic-disease (last access: 6 September 2015).

CR: endemic disease, enzootic, epidemic, pandemic, panzootic.