GLOSSARY

WORDS FOL­LOWED BY THIS SYM­BOL ARE DE­FINED HERE

EQUUS - - Equus -

ana­phy­lac­tic shock (ana­phy­laxis)---acute, mas­sive, of­ten fa­tal al­ler­gic re­ac­tion trig­gered by the in­tro­duc­tion of an anti­gen into a horse who al­ready has be­come hy­per­sen­si­tized to that anti­gen. an­ti­body--- dis­ease-fight­ing sub­stance pro­duced by the body in re­sponse to the pres­ence of an anti­gen. arthroscopy--- ex­am­i­na­tion of the interior of a joint through a slen­der fiber-op­tic in­stru­ment; used pri­mar­ily in joint surgery, arthroscopy has ren­dered many more in­va­sive tech­niques ob­so­lete. ataxia--- in­co­or­di­na­tion of the mus­cles, which re­sults in shaky, ir­reg­u­lar move­ments; may also be ac­com­pa­nied by weak­ness and loss of pro­pri­o­cep­tion. choke--- in horses, ob­struc­tion of the esoph­a­gus; in peo­ple, ob­struc­tion of the wind­pipe (tra­chea). deep dig­i­tal flexor ten­don--- ten­don con­nect­ing the deep mus­cles at the back of the fore­arm and gaskin to the cof­fin bone in the foot. equine her­pes myeloen­cephalopa­thy--neu­ro­log­i­cal dis­or­der caused when equine her­pesvirus-1 or -4 in­fects the brain and spinal cord. equine her­pesvirus (EHV)---a fam­ily of viruses that pri­mar­ily cause chronic res­pi­ra­tory in­fec­tions in horses (EHV-1, EHV-4). EHV-1 can also cause abor­tions in mares and, in rare cases, both EHV1 and -4 can cause neu­ro­log­i­cal signs, in­clud­ing pro­gres­sive weak­ness and in­co­or­di­na­tion. EHV-3 causes a vene­real dis­ease called equine coital ex­an­thema. fe­cal egg count--- lab­o­ra­tory pro­ce­dure for de­ter­min­ing the num­ber of in­ter­nal-par­a­site eggs in a fe­cal sam­ple; used pri­mar­ily to es­ti­mate a horse’s level of in­fec­tion with as­carids and/or strongyles. heaves--- com­mon term for re­cur­rent air­way ob­struc­tion, a res­pi­ra­tory dis­ease, usu­ally of older horses, in­duced by ex­po­sure to dusts typ­i­cally found in sta­bles and re­sult­ing in nar­row­ing of the small air­ways of the lungs. hives (ur­ticaria)---soft, raised bumps, one-third to more than an inch in di­am­e­ter, which break out si­mul­ta­ne­ously in groups in re­sponse to an al­ler­gic re­ac­tion. in­gesta--- the par­tially di­gested con­tents of the in­testi­nal tract; the food­stuff eaten. lamini­tis--- in­flam­ma­tion of the sen­si­tive plates of soft tis­sue (lam­i­nae) within the horse’s foot caused by phys­i­cal or phys­i­o­logic in­jury. Se­vere cases of lamini­tis may re­sult in founder, an in­ter­nal de­for­mity of the foot. Acute lamini­tis sets in rapidly and usu­ally re­sponds to ap­pro­pri­ate, in­ten­sive treat­ment, while chronic lamini­tis is a per­sis­tent, long-term con­di­tion that may be un­re­spon­sive to treat­ment. necropsy--- ex­am­i­na­tion of an an­i­mal’s body after death, nor­mally done to as­cer­tain the cause of death. pH--- mea­sure ex­press­ing the acidic or ba­sic na­ture of a sub­stance, on a scale of 0 (most acidic) to 14 (most ba­sic). plasma--- blood liq­uid that con­tains spe­cial­ized cells, such as platelets, and the pro­teins re­lated to clot­ting; ob­tained by cen­trifug­ing whole un­clot­ted blood to set­tle out the other cells. platelet-rich plasma (PRP)---de­rived from a pa­tient’s own blood, PRP is plasma that has un­der­gone pro­cess­ing to con­cen­trate platelets. PRP may be in­jected into soft tis­sue in­juries so that the mul­ti­ple growth fac­tors that platelets re­lease will en­hance heal­ing. platelets--- disk-shaped cell frag­ments re­spon­si­ble for co­ag­u­la­tion of the blood. ra­dius--- prin­ci­pal bone of the fore­arm. rhinop­neu­moni­tis--- highly con­ta­gious dis­ease caused by her­pesviruses (EHV-1, EHV4); char­ac­ter­ized by fever, mild res­pi­ra­tory in­fec­tion and, in mares, abortion. In rare cases, some strains of these her­pesviruses also cause po­ten­tially fa­tal neu­ro­log­i­cal com­pli­ca­tions. sus­pen­sory lig­a­ment--- strip of fi­brous tis­sue run­ning from the back of the up­per can­non bone over the fet­lock joint to the pastern bones. Pro­vides ma­jor sup­port for the fet­lock joint, pre­vent­ing it from sink­ing to the ground. sweet itch--- allergy to the saliva of one or more var­i­ous in­sects (culi­coides, gnats, midges, no-seeums); pro­duces an in­flam­ma­tory, itchy thick­en­ing and scab­bing of the skin of the rump and/or with­ers, which be­come bare and weepy when the horse scratches. sy­napse--- junc­tion point on a neu­ron at which im­pulses are trans­mit­ted to other neu­rons, mus­cle cells or glands. toxin--- poi­sonous sub­stance pro­duced by a liv­ing or­gan­ism. uveitis--- in­flam­ma­tion of the pig­mented struc­tures within the eye­ball.

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