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Parasitology exam 3
n/a
118
Biology
Undergraduate 4
05/08/2011

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Term
What are the two main groups of arthropods?
Definition
1. Arachnids
2. Insects
Term
What are the characteristics of arachnids?
Definition
1. No antennae
2. No wings
3. Adults have eight legs
4. Feed on tissue fluid
Term
What can the toxin released by ticks cause?
Definition
Progressive paralysis
Term
What are two types of paralysis that can occur? Are they the same?
Definition
Coonhound Paralysis and Tick Paralysis are not the same.
Term
What are the two groups Ticks are divided into?
Definition
Soft ticks and hard ticks.
Term
What is an example of a spirochete that is transmitted by a arthropod?
Definition
Lyme Disease
Term
What is an example of a protozoa that is transmitted by a arthropod?
Definition
babesiosis
Term
What is an example of a bacteria that is transmitted by a arthropod?
Definition
Tularemia
Term
What is an example of a rickettsial that is transmitted by a arthropod?
Definition
Rocky Mountain Spotted Fever
Term
What is the term for soft ticks?
Definition
Argasidae
Term
What is the spinose ear tick that is found in cattle?
Definition
Otobius megnini
Term
What is the fowl tick that lays eggs in cracks and crevices?
Definition
Argus persicus
Term
What is the term for hard ticks?
Definition
Ixodidae
Term
What is the dorsal plate on hard ticks called?
Definition
Scutum
Term
What is the hart tick of cattle?
Definition
Boophilius annulatus
Term
What does Boophilus annulatus transmit in cattle?
Definition
Babesia
Term
What is the common wood tick that transmits Rocky Mountain Spotted Fever and tick paralysis?
Definition
Dermacentor andersoni
Term
What is the American dog tick that transmits RMSF and tick paralysis?
Definition
Dermacentor variabilis
Term
What is the major vector of RMSF among wildlife species?
Definition
Haemaphysalis leporispalustris
Term
What is also known as the rabbit tick?
Definition
Haemaphysalis leporispalustris
Term
What is the deer tick?
Definition
Ixodes dammini (also I. scapularis)
Term
What does Ixodes dammini (also I. scapularis) transmit?
Definition
Lyme disease to man and animals and transmits Babesia from white-footed mice to humans.
Term
What are the general characteristics of mites?
Definition
1. Mostly free-living
2. Life cycle similar to ticks
3. Adults have 8 legs
Term
What is a mite infestation called?
Definition
acariasis
Term
What is a disease from a mite called?
Definition
Mange
Term
What does Sarcoptes scabiei cause?
Definition
Sarcoptic mange.
Term
What is the life cycle of Sarcoptes scabiei?
Definition
The mites burrow in the skin; female lays two or three eggs per day; larvae and nymphs are found in hair follicles or in burrows created by the female mite. Mites return to the skin surface to mate.
Term
How long is the total life cycle of Sarcoptes scabiei?
Definition
2-3 weeks.
Term
Sarcoptes scabiei causes secondary bacterial infections due to scratching on what areas?
Definition
Ears, armpits, legs.
Term
What is the severity of Mange?
Definition
Disease is severe and occasionally fatal in immunosuppressed individuals.
Term
What is the mite that is similar to Sarcoptes that occurs in cats and rabits and causes a major problem in big cats?
Definition
Notoedres cati.
Term
What causes the "scaly leg" in birds?
Definition
Knemidocoptes mutans
Term
What causes wart-like growths and thickened skin on the face of parakeets?
Definition
Knemidocoptes pilae.
Term
What causes psoroptic mange or "scab"?
Definition
Nonburrowing mites.
Term
Where do nonburrowing mites live?
Definition
live on surface of skin among scabs at base of hair.
Term
How do nonburrowing mites affect the host?
Definition
mites puncture skin to suck lymph; causes local inflammatory reaction. Produce anticoagulant- serum oozes out and forms crust on skin. Crusts cause hair or wool to fall out.
Term
How is Psoroptes equi transmitted to horses?
Definition
By direct contact, grooming utensils, blankets.
Term
What is the ear mite of rabbits?
Definition
Psoroptes cuniculi. Look like cornflakes.
Term
What is the ear mite of dogs and cats?
Definition
Otodectes cynotis
Term
What does Chorioptes bovis/equi cause?
Definition
Leg mange of horses and cattle.
Term
Where does the leg mange caused by Chorioptes bovis/equi occur around?
Definition
Fetlocks and pasterns.
Term
What is called the "red mite"?
Definition
Dermanyssus gallinae. Red from blood.
Term
What is the northern fowl mite that is also the feather mite?
Definition
Ornithonyssus silverion.
Term
What causes demodectic mange?
Definition
Demodex sp.
Term
What are the several species of Demodex sp?
Definition
D. bovis
D. canis- most common.
D. folliculorum (man)
Term
Where does demodex live?
Definition
in hair follicles and sebaceous glands.
Term
What are the shape of Demodex parasites?
Definition
Cigar-shaped.
Term
What can Demodex cause that is a severe, life-threatening disease?
Definition
Red Mange.
Term
Where is Red mange seen common in?
Definition
Puppies 3-10 months old.
Term
What is demodex most common in?
Definition
Purebred dogs when bitches tend to produce litters with generalized infections.
Term
What is Cheyletiella sp.? What does it cause?
Definition
"Walking dandruff" causes dry, scaly, itchy dermatitis.
Term
What is seen in wild primates in their airways and lungs?
Definition
Pneumonyssus simicola
Term
What are chigger mites?
Definition
Trombicula sp. Free-living in grass and soil.
Term
What stage of Trombicula sp. penetrates skin and burrows?
Definition
Larvae (weak)
Term
What percentage of all animal species are insects?
Definition
80%
Term
What are the three parts of the body that characterize insects?
Definition
a. Head
b. Thorax
c. Abdomen.
Term
What are the stages of the life cycle of insects?
Definition
eggs, larvae, pupae and adults.
Term
What are Culicoides sp?
Definition
midges/gnats. Have humped thorax. females suck blood.
Term
What can Culicoides sp. transmit?
Definition
Protozoa and filaria. Also transmits bluetongue virus. Transmits EHD which infect white-tail deer.
Term
What flie transmits Leucocytozoon?
Definition
Simulium sp.
Term
What transmits leishmania?
Definition
Sand flies or Phelbotomus sp.
Term
What are the three genera of Mosquitoes?
Definition
1. Culex sp.
2. Aedes sp.
3. Anopheles sp.
Term
What can Mosquitoes transmit?
Definition
Malaria, viral diseases, filarial worms (heart-worms).
Term
What are Tabanus sp?
Definition
Horse flies about one inch long that will attack man.
Term
What does Tabanus sp. transmit?
Definition
Anthrax, tularemia, typhus, trpanosomes, Elaephora scheideri.
Term
What are Chrysops sp.?
Definition
Deer flies about an inch long. Smaller than horse flies.
Term
What is Musca domestica?
Definition
common house fly. Adults are not considered true parasites, larvae infest other tissues of man and animals.
Term
What is the term for infestation with maggots?
Definition
myiasis.
Term
What transmits Thelazia lacrymalis in horses and M. bovis in cows?
Definition
Musca autumnalis (face fly).
Term
What is the intermediate host of Habronema and Drashia?
Definition
Stomoxys calcitrans. Mechanical transmission of EIA and anthrax.
Term
What is the intermediate host of Habronema and Drashia?
Definition
Stomoxys calcitrans. Mechanical transmission of EIA and anthrax.
Term
Where does Haematobia irritans affect on cattle?
Definition
Attack cattle around the base of the horns, on back, shoulders and belly; prefer dark-colored animals.
Term
Where does the horn fly remain?
Definition
On its host all the time. Only leaves to pass to another host or to lay eggs.
Term
What are the two types of blow flies?
Definition
Lucilia and Phormic
Term
What is the life cycle of Blow flies?
Definition
Larvae hatch in eight hours to 3 days, depending on temperature. Larvae (maggots) feed on material in which the eggs were laid.
Term
What do blow fly larvae produce?
Definition
Alantonin- liquefies tissue.
Term
What causes a "fly strike"?
Definition
Blow flies attacking sheep.
Term
What is the screw worm fly?
Definition
Cochliomyia hominovorax
Term
How was the screw worm eliminated from the US?
Definition
Adults mate only once per year. Released sterilized male flies.
Term
What are Gasterophilus sp.?
Definition
Horse bots.
Term
What is the life cycle of the three species of Gasterophilus sp.?
Definition
a. One species lays eggs on front legs- light yellow; G. intestinalis; cardiac.
b. One species lays eggs on lip and cheek hairs- black; Hemorrhoidalis pulorus.
c. Third species lays eggs in intermandibular region- yellow. G. nasalis pylorus.
Term
What species of horse bot lays eggs on front legs?
Definition
G. intestinalis
Term
What species of horse bot lays eggs on lip and cheek hairs?
Definition
Hemorrhoidalis pulorus
Term
What is the species of horse bot lays eggs in intermandibular region?
Definition
G. nasalis pylorus.
Term
What is the nasal bot of deer?
Definition
Cephenemyia
Term
What is the nose bot of sheep?
Definition
Oestrus ovis.
Term
What is the bot flies of rodents, kittens and puppies?
Definition
Cuterbra sp.
Term
How are Cuterebra sp. removed?
Definition
Form a pocket. Must be surgically removed. If crushed can cause anaphylactic shock.
Term
What are Hypoderma sp.?
Definition
Called warbles or grub-in-the-back. Look like bees.
Term
What is the life cycle of Hypoderma lineatum larvae?
Definition
Penetrate skin and migrate in fat around spinal cord; eventually reach skin of back; form a breathing hole, remain there over the winter; emerge through breathing hole in spring and rop to ground, complete life cycle on ground.
Term
What is the sheep tick?
Definition
Melophagus ovinus.
Term
What is the wingless fly the resembles a louse?
Definition
Sheep ked.
Term
What is the control of sheep ked?
Definition
population greatly reduced by shearing; insecticide treatments used for other ectoparasites also effective against it.
Term
What is the scientific name of the bedbug?
Definition
Cimex lectularis.
Term
What is an infestation of lice called?
Definition
pediculosis
Term
How do lice spread?
Definition
females attach eggs (nits) by glue-like substance to feathers or hair.
Term
What are the two types of lice?
Definition
Mallophagans and Anoplurans.
Term
What is the term for chewing lice?
Definition
Mallophagans
Term
What is the term for sucking lice?
Definition
Anoplurans
Term
What are the species of Mallophagans?
Definition
Bovicola ovis
Trichodectes canis
Felicola substrata
Term
What important types of Anoplurans transmit diseases to humans?
Definition
Pedoculus humanus (human louse)
Phthirus pubis (CRABS)
Term
What are the types of cattle anoplurans?
Definition
Linognathus spp.
Hematopinus spp.
Term
What is the type of Anopluran that is a serious problem in pigs?
Definition
Hematopinus suis.
Term
What are some characteristics of fleas?
Definition
Wingless; flattened laterally; adapted for moving through hair. Strong hind limbs for jumping.
Term
What are the spines on head and thorax of flea called?
Definition
Combs
Term
What is the life cycle of Fleas?
Definition
Lays eggs on host, but eggs are not attached to hair; fall off where animal rests- small, oval, pearly white; Hatch in about 16 days. Larvae feed on dried blood in flea feces. in 10 days form pupae. Pupae develop for 10-17 days before adults emerge.
Term
How long does an entire life cycle of fleas take?
Definition
>30 days
Term
What does fleas cause in animals?
Definition
Anemia, allergy to flea bites is very common.
Term
Where are fleas often found around?
Definition
Tail head, toward back end of dog, especially on back.
Term
What is transmitted by fleas from animal to animal and to humans?
Definition
Plague
Term
What are some examples of diseases that fleas transmit?
Definition
Plague
Myxomatosis
tapeworms
filaria
Term
What is myxomatosis?
Definition
Viral disease of rabbits.
Term
What are Dipylidium caninum?
Definition
tapeworms
Term
What are Dipetalonema reconditum?
Definition
filaria
Term
What are the fleas that attack dogs and cats?
Definition
Ctenocephalides canis and felis.
Term
What is Xenopsylla cheopis?
Definition
Oriental rat flea that spread bubonic plague
Term
What is Pulex irritans?
Definition
Human flea
Term
What is Echidnophage gallinaceae?
Definition
stick tight flea of poultry.
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