Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia.
The six-legged larva of a tick.
1. the mature ovule of a flowering plant.
3. a small cylindrical shell of gold or other suitable material, used in application of radiation therapy.
4. to inoculate a culture medium with microorganisms.
chemicals mixed with seed grain to prevent infestion with insects and rodents and infection by fungi. Most are poisonous to animals and deaths may occur if the grain is not used as seed and is put back into the animal feed chain. The amount of feed in a collection of seed is usually very large and the probability is that it would be fed without dilution which would reduce its toxicity. Grain or grain products are also used as bait for birds, or to repel birds and to poison snails and other garden pests and all of them may be accessible to animals.
cereal grain intended to be used as seed for a crop.
mixtures of small grass and cereal seeds used as feed for companion birds. Some of the seeds used are the millets, chopped oat groats, canary grass (Phalaris spp.) seed, sunflower seed, hemp seed, rape seed.
plantago seed, plantain seed, psyllium seed
cleaned, dried ripe seed of species of Plantago; used as a cathartic.
a small sealed container for radon, for insertion into the tissues of the body in radiotherapy.
larval form, the stage prior to the nymph.
a blood-sucking arachnid parasite. There are two types, hard and soft. Includes American dog (dermacentorvariabilis), argasid tick, bont (amblyommahebraeum), British dog (ixodescanisuga), brown dog (rhipicephalussanguineus), brown ear (rhipicephalusappendiculatus), brown winter (dermacentornigrolineatus), castor bean (ricinus communis), cayenne (amblyommacajennense), Gulf Coast (amblyommamaculatum), ixodid, lone star (amblyommaamericanum), pajaroello (ornithodoruscoriaceus), red-legged (rhipicephalusevertsi), Rocky Mountain wood (dermacentorandersoni), shingle (syn. moose, dermacentoralbipictus), spinose ear (otobiusmegnini), tropical bont (amblyommavariegatum), yellow dog (haemaphysalisleachi leachi) tick.
canine tick typhus
see canine ehrlichiosis.
a neck collar made of a PVC resin which releases particles of insecticide over a period of several months and aids in the control of tick infestations in companion animals.
ticks of the family Ixodidae and members of Ixodes, Boophilus, Margaropus, Hyalomma, Rhipicephalus, Haemaphysalis, Aponomma, Dermacentor, Amblyomma, Rhipicentor spp. They have a hard chitinous shield on the dorsal surface of the body, on the entire back of the male but only the anterior portion of the female.
the female of several species of ticks but most commonly Ixodes or Dermacentor spp. elaborates a neurotoxin that typically causes an ascending flaccid paralysis in many animal species and humans but particularly in companion animals and young food animals. Affected dogs first develop weakness and paralysis of the hindlimbs, then forelimbs and ultimately respiratory paralysis unless the tick is removed and, in some cases, treatment with hyperimmune serum is given.
an infection of lambs caused by Staphylococcus aureus and transmitted by the bites of ticks. Newborn lambs die of septicemia or develop signs of arthritis, meningitis or dermatitis. Called also staphylococcal pyemia.
see seed tick.
ticks of the family Argasidae including Argas, Otobius, Ornithodorus spp. These ticks have no dorsal protective shield.
said of wool or fleece that is heavily discolored by the feces of sheep ked (Melophagus ovinus).
see sweating sickness.
ticks act as vectors of protozoa, bacteria, viruses, rickettsia.
an all-embracing term to describe the debilitating effects of heavy tick infestations. Includes anemia, irritation by the ticks, local infection as a result of bites, secondary blowfly and screw-worm infestation.