01463nas a2200169   4500008004100000245006900041210006700110260000900177300001400186490000700200520092100207100002501128700002301153700002401176700002101200856007201221       2004                        eng d00aHair-loss syndrome in black-tailed deer of the pacific northwest0 aHairloss syndrome in blacktailed deer of the pacific northwest  c2004  a670 - 6810 v403 aA widespread hair-loss syndrome (HLS) has affected Columbian black-tailed deer (Odocoileus hemionus columbianus) in western Oregon and Washington (USA) since 1996. In order to better characterize the condition, 21 HLS-affected black-tailed deer (BTD) were necropsied, and body condition, parasite burdens, and significant lesions were noted. All deer were in poor body condition, and at least 17 had severe internal parasite burdens. A consistent finding was the presence of large numbers of chewing lice, identified as an indeterminate species of Damalinia (Cervicola). Four animals were infested with intrafollicular Demodex sp., the first report of this genus of mites in BTD. We postulate that the hair loss is largely due to ectoparasitism by a species of chewing louse that represents a new pathogen for BTD. This loss of pelage also may be an important contributor to the poor body condition of these animals.1 aBildfell, Robert, J.1 aMertins, James, W.1 aMortenson, Jack, A.1 aCotlam, Doug, F.  uhttp://www.phthiraptera.info/sites/phthiraptera.info/files/8919.pdf