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Vet. Parasitology

Nematodes

TermDefinition
Cervical Alae Lateral expansion of the cuticle in the anterior end of nematodes
Copulatory Bursa Flattened, lateral expansion of a nematode's cuticle in the posterior end of certain males; used to hold on to or grasp the female during mating
Bursal Rays Fingerlike projections that make up the copulatory bursa of a male nematode
Spicules Male nematode's intermittent organs ("penis") associated with the copulatory bursa
Hypodermis Thin layer beneath the cuticle that secretes the cuticle layer of the nematode
Somatic Muscular Layer The layer of muscle below the hypodermic that is used by nematodes to move
Body Cavity Hollow area of the body that contains the major organs of an organism
Pseudocoelom Cavity between the middle layer and inner layer of the three body tissue layer of the nematode
Pseudocoelomic Membrane The tissue that surrounds and lines the pseudocoelom
Papillae Fingerlike or bump like projections on the cuticle of a nematode; may replace the lips in some nematodes
Leaf Crown The collection of papillae of nematodes
Rectum Opening of the intestine of the female nematode to the outside
Cloaca Opening of the intestine of the male nematode to the outside
Dioecious Having separate sees, both male and female
Tubular Testes Male nematode's reproductive organs
Vas Deferens Male nematode's reporcutve organ connecting the tubular testes to the cloaca
Spicule Pouch Pocket that contains the male reproductive organs used to open the female nematode's vulva
Tubular Ovaries Female nematode's reproductive organs
Oviduct Female nematode reproductive organ that connects the tubular ovaries to the uterus
Seminal Receptacle A female nematode's reproductive organ used to store sperm
What are the different types of eggs female nematodes can produce? Ascaroid, trichostrongyle or strongyle, spiruroid, and trichinelloid or trichuroid
Oviparous Type of nematode egg that contains either a single cell or a morula, a grape like cluster of cells
Ovoviviparous Type of nematode egg that contains a first-stage larva
Larviparous Type of female nematode that retains her eggs within the uterus and produces live first-stage larvae
Molt Shedding of the outside cuticle
Infective Third-Stage Larva Stage in the life cycle that is able to infect the definitive host
Direct Life Cycle Life cycle that does not involve an intermediate host
Indirect Life Cycle Life cycle of a parasite that requires an intermediate host
Prepatent Period Time from the point of infection by a nematode until a specific diagnostic stage can be recovered
Vermifuge Dewormer that paralyzes (but does not kill) the adult parasite so it passes in the feces
Vermicide Dewormer that kills the parasite so that it can be broken down by the host's body
Parthenogenesis Modified form of sexual reproduction characterized by the development of offspring by a female nematode from eggs that have not been fertilized by a male nematode
Microfilaria Immature stage of filarial parasites
Adulticides Drugs that kill the adult stages of the parasite
Microfilaricide Dewormer that kills the immature filarial worm
Facultative Parasite Organism that is usually free living (nonparasitic) in nature and develops a parasitic existence in certain hosts
Rhabditiform Esophagus Type of nematode esophagus that has a corpus, isthmus, and posterior bulb
Strongyles Nematodes that parasitize the large intestine of horses and are typically divided into two types, large strongyles and small strongyles
Created by: KaleighMichelle
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