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Parasitology Exam 1

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Question
Answer
The type of association in which one benefits and the other is neither helped nor harmed   Commensalism  
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The type of association in which the 2 organisms are mutually interdependent and both benefit   Mutualsim  
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The type of association in which the two organisms are just “traveling together”; there is no dependence   Phoresis  
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Another name for a trematode is a   Fluke  
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Fasciola hepatic is an example of a   trematode/fluke  
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Another name for a cestode is a   tapeworm  
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Taenia solium is an example of a   cestode/tapeworm  
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Platyhelminthes are also known as   Flat worms  
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Trematodes/flukes and cestodes/tapeworms are types of   platyhelminthes/flat worms  
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Another name for a nematode is a   roundworm  
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Heartworms, hookworms, ascarids, and whipworms are all types of   roundworms/nematodes  
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Dirofilaria immitis is a species known as the   heartworm  
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True/False: Dracunculus insignis is a type of flatworm.   False.Dracunculus insignis is a type of roundworm/nematode.  
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Giardia lamblia, Leishmaina promastigotes, and Trypanosoma cruzi are all types of   protozoans  
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The louse and flea are both examples of   Arthropods: insects  
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The tick and mite are both examples of   Arthropods: arachnids  
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This type of parasite is one that is physiologically & metabolically dependent on the host   Obligatory parasite  
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This type of parasite is one that establishes a relationship with a host, if there is opportunity   Facultative parasite  
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This type of parasite is found on the outside or on the skin of the host. Examples include ticks, mites, mosquiotes, and horseflies.   Ectoparastie  
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This type of parasite is found within the host. Examples include worms and protozoans   Endoparasite  
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This type of parasite is one that is found in a host other than its normal host   Accidental parasite AKA incidental/aberrant  
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This type of parasite contacts its host only to feed & then leaves. Examples include mosquitoes and horseflies.   Temporary parasite AKA intermittent  
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This type of parasite lives its entire adult stages in/on the host   Permanent parasite  
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This type of host is the one in which the parasite reaches sexual maturity or the one that is most important in the life cycle if no sexual reproduction occurs   Definitive host  
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This type of host is a required host in which some development or asexual reproduction occurs, but sexual maturity does not occur   Intermediate host  
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This type of host is a nonessential host in the life cycle of a parasite that can harbor and maintain immature stages of the parasite. It may provide another source of infection for the definitive host   Paratenic host  
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This type of host is a “living source” of the parasite; not the (definitive) host of primary concern   Reservoir host  
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This type of host is one in which a host that harbors a parasite that normally doesn’t infect it   Accidental host  
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This type of host is one in which an invertebrate host that actively transmits a disease agent from one vertebrate host to another (usually an arthropod)   Vector  
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Oxyuris equi is also known as the   horse pinworm  
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What type of host is the horse for Oxyuris equi?   Definitive host  
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What type of host is the human for Giardia lamblia? What type of host is the beaver?   Definitive hostReservoir host  
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What type of host are the dog and cat for heartworm? What type of host is the mosquito?   Definitive hostIntermediate host and vector  
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What type of host is the dog/puppy for the ascarid toxocara? What type of host is the mouse? What type of host is the human child?   Definitive hostParatenic hostAccidental Host  
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The life story of the parasite’s development, maturation, and transmission is known as the   life cycle  
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This type of life does not require an intermdediate host, therfore it is a one host life cyle   Direct life cyle  
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This type of life cycle includes an intermediate host, therefore its is a multi-host life cycle   Indirect  
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What type of host are the moose and deer for Parelaphostrongylus tenuis? What type of host is the slug?   Definitive hostIntermediate host  
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This is the time between infection with a parasite and when the parasite can be detected in the host via a diagnostic method (e.g., fecal flotation, blood test).   Prepatent period  
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This is the time between the initiation of infection and onset of disease (i.e., clinical signs).   Incubation period  
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True/False: The prepatent period and incubation period are the same thing.   False  
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This is the stage of the parasite that can initiate an infection in the definitive host or the intermediate host   Infective stage  
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Infest or Infect?Endoparasites   Infect  
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Infest or Infect?Ectoparasites   Infest  
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The term for the disease of animals that can be transmitted to humans   Zoonosis  
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The term for an inanimate object that can transmit pathogens from one host to another. Examples include bedding and grooming tools   Fomite  
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The term for the degree to which a parasite is able to mature in more than one host species   Host Specificty  
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The term for the way the parasite gets in; ex. Ingestions, burrowing/penetration, through vector (injection)   Route of Infection  
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This term is defined as where the parasite goes within the host; generally predetermined   Route of migration  
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What three influences effect the way a parasite effects the host?   Parasite numberImmune status of the host (immuno-compromised; age of host)Inherited immunity  
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Generally, the higher the number of parasites,...   the more intense the reaction of the host  
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When it comes to the immune status of the host, the _____ and the _____ are more susceptible to parasites. (as related to age)   very young and rather old  
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The genetic basis for susceptibility or resistance of a host to a parasite   Inherited immunity  
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Possible pathogenesis for parasites on a host include: (List 8)   1.Failure to thrive2.Mechanical blockage3.Anemia due to lysis of RBCs4.Anemia due to consumption of blood by parasites5.Hypersensitivity reactions6.Tissue changes-neoplasms7.Fibrosis, damage due to parasite migration8.2ndary BacT infection  
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These Arthropods are examples of ______: fleas, lice, flies, and true bugs/bed bugs   Insects  
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These Arthropods are examples of ______:mites, ticks, spiders, scorpions   Arachnids  
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These Arthropods ar examples of ______:copepods, crabs, crayfish   Crustaceans  
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The circulatory system of Arthropods is _____, meaning it is not enclosed in blood vessels.   open  
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The nervouse and excretory systems of Arthropods is ______.   primitive  
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The digestive tract of Arthropods is _______.   complete  
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True/False: Arthropods are dioecious, meaning the males and females appear different.   True  
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Adult Insects have:____ Antennae____ Regions____ Legs____ Wings   1 pair of antennae3 regions of the body (head, thorax, abdomen)3 pairs of legsOften have wings (fleas/lice-none; flies-1 pair; bees-2 pairs)  
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Adult Arachnids have:____ Antennae____ Regions____ Legs____ Wings   No antennae2 regions (head/thorax combo and abdomen)4 pairs of legs (larva has 3 pairs)No wings  
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What are the stages of the Simple Metamorphosis life cycle?   Egg -> Nymph stages -> Adult  
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How do insects in the nymph stage appear?   The look like mini adults without wings.  
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True/False: Nymphs are sexually mature.   False. Nymphs are sexually immature.  
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True/False: Nymphs and adults are found in the same habitat.   True  
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What are the stages of the Complex Metamorphosis life cycle?   Egg -> Larva -> Pupa -> Adult  
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True/False: All stages in the complex metamorphosis life cycle are found in the same habitat.   False. They are found in different habitats.  
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How do insects in the larval stage appear? What type of stage is this?   They appear worm like.The larval stage is a feeding stage.  
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A large reorganization of tissue occurs during which phase?   Pupal  
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True/False: The pupal stage is a feeding stage.   False. It is a non-feeding stage.  
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Flies, fleas, butterflies, and beatles all have ______ metamorphosis life cycles.   Complex  
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Cockroaches and kissing bugs have ______ metamorphosis life cycles.   Simple  
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What are the stages of the metamorphosis life cycle for ticks and mites?   Egg -> Larva -> Nymph -> Adult  
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What word means "fear of bugs"?   Entomophobia  
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What is myiasis?   infestation of tissue with fly larvae  
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Animals can sense flies nearby and become so nervous/concerned with them that there is a decrease in production. What is this called?   Fly worry  
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A ______ _____ picks up a pathogen from one place and transmits it to another. NO change occurs in/to the pathogen   Mechanical vector  
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A ______ _____ picks up a pathogen, which then multiplies or develops. It is required for the pathogen to survive and be transmitted; pathogen specificty.   Biological vector  
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Cyclodevelopmental is .....An example is the heartworm developing from L1 to L3.   Pathogen development within a vector  
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Propogative is.....Examples include viruses and bacteria   Pathogen multiplication within a vector  
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Cyclopropogative is ....Examples include protozoans   Pathogen development and multiplication within a vector  
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List 5 things involved in Arthropod Control   1. Environmental manipulation2. Insecticides and acaricides3. Biological control4. Traps5. Individual protection  
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This Order's name means "two-wings"   Diptera  
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What are halteres?   Reduced hind wings used as balancing organs  
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True/False: Most of the members of the Order Diptera are viviparous, but a few are oviparous.   False. Most members are oviparous (egg laying), but a few are viviparous (live young).  
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True/False: The Order Diptera includes the true flies.   True  
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This Dipteran suborder's name means "thread horn"   Nematocera  
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This Dipteran suborder includes small, delicate insects with filamentous antennae   Nematocera  
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Mosquitoes, sand flies, midges, and black flies are all members of what Dipteran suborder?   Nematocera  
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This Dipteran suborder's name means "short horn".   Brachycera  
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This Dipteran suborder includes large flies with 3 segmented antennae, the last of which is annulated.   Brachycera  
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Horse flies and deer flies are members of this Dipteran suborder.   Brachycera  
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This Dipteran suborder's name means "round seam".   Cyclorrapha  
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This Dipteran suborder contains large flies with aristate antennae (bristle/hair).   Cyclorrapha  
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House flies, bot flies, blow flies, and bottles flies are all members of what Dipteran suborder?   Cyclorrapha  
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The Dipteran suborders ______ and _______ have free-living larvae, while the suborder ______ has free-living and parasitic larvae.   Nematocera and BrachyceraCyclorrapha  
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Piercing, cutting, sucking, cutting/sponging, and bayonet- or scissor-like mouthparts are used for _______ _______.   Blood feeding  
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Sponging only or vestigial mouthparts are used for ______ ______.   Non-blood feeding  
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Why do female mosquitoes feed on blood?   The protein in the blood is necessary for egg development.  
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How do male and female mosquitoes differ in their food sources?   Males eat from sugar sources only, while female eat from blood and sugar sources.  
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How do male and female mosquitoes differ in their mouth parts?   Males have hairy/plumose mouthparts, while females have threadlike mouthparts.  
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What is the host spectrum fo mosquitoes?   Warm and cold-blooded animals; many are night-biters  
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What is the water preference for female mostquitoes to lay their eggs?   Quiet  
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What is the site of infestation for mosquitoes?   On the skin  
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These insects transmit Dirofilaria immitis (HW) and encephalitis viruses (WNV).   Mosquitoes  
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What are the three methods of control for mosquitoes?   1. Remove breeding sites2. Judicious use of insecticides3. Personal protection (DEET, long-sleeved shirts, long pants)  
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What is the public health significance of mosquites and why is it at this level?   Great: they transmit dengue, yellow fever, human malarias, lymphatic filariasis, WNV  
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What are the conversion factors for microscopes with x10 eyepieces?x4 obj=_____x10 obj=_____x40 obj=_____x1000 obj=_____   x4 obj = 25. microns per unit space/divisionx10 obj = 10 microns....x40 obj = 2.5 microns....x100 obj = 1.0 microns....  
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What are the conversion for the following into microns?1 mm = ____0.1 mm = _____0.01 mm = _____0.001 mm = _______   1 mm = 1,000 microns0.1 mm = 100 microns0.01 mm = 10 mmicrons0.001 mm = 1 micron  
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Are there wings present on mites?How many body regions do they have?   No2 body regions  
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Is Trypanosoma within cells or extracellular?What about Babesia?   Trypanosoma: extracellularBabesia: within cells  
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Are Giardia found in the GI tract or in the blood?   Blood  
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How many body regions are present in ticks?Are there any wings?   2No wings  
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Simulium =   Black fly  
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Ctenocephalides =   Flea  
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Linognathus =   Louse  
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Sarcoptes =   Mite  
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Demodex =   Mites  
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Trypanosoma =   Hemoflagellate  
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Giardia =   Mucosflagellate  
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Ixodes =   Ticks  
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Fasciola hepatica =   Trematode  
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Dipylidium caninum =   Cestode  
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Identify the parasite:Adults have external suckers and are usually flatEggas are 20-200 microns long, ofter operculated (have lid) and golden to dark brown color, and can contain a ciliated larva   Fasciola hepatica/Trematode  
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Identify the parasite:Adults have a head (scolex) followed by multiplfe flat pseudosegments (proglottids)Some have operculated eggsSome eggs contain embryos that have six chitinous hooksSome eggs contain a pear shaped structure   Diplydium caninum/Cestode  
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Identify parasite:Adults are dioecious and cylinder shapedEggs are 30-100 microns in length, containg a zygote that, dependent on species, can be single cell, multiple cells or L1 when eggs are found in fresh fecesSome passed as L1 outside of eggs   Nematodes  
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A cuticular expansion supported by muscular rays on the posterior end of the Nematode male   Copulatory bursa  
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Found on the anterior end (stoma) of nematodes; used to distingush certain groups   Buccal capsule or cavity  
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Identify the parasite:Eggs can by "bumpy" due to a protein coat; if the coat was removed the egg would be smooth   Nematode  
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