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Parasitology > Chapter 13 > Flashcards

Chapter 13 Flashcards

1
Q

What kind of animals do Branchiura parasitize, what type of parasites are they

A

ectoparasites, fish

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2
Q

What order do lice belong to

A

phthiraptera

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3
Q

What species of lice parasitize humans and what are their common names

A

P. humanus humanus body louce
P humanus capitis head louse
Phthirus pubis-crab louse/pubic lice

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4
Q

What are the life cycle stage of lice

A

eggs-nits
nymphs
adults

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5
Q

Where are body louse found? on humans and fomites

A

humanus humanus

clothing, eggs cemented onto fibers

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6
Q

How many eggs do F body louse lay

A

9-10 per day

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7
Q

What is used to get rid of body lice, what institutions tend to use this in their clothing

A

the military, permethrine

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8
Q

Where are head louse found on humans

A

nits cement onto hair

neck, behind ears, hair

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9
Q

What are the symptoms of head lice

A

scratching, itchiness, could lead to dermatitis or secondary infection

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10
Q

Where are Phthirus pubis found

A

pubic region/ pubic lice

armpits, beards, mustaches, eyebrows and eyelashes

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11
Q

How many eggs do phthirus pubis lay

A

30 in their lives

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12
Q

How is Phthirus pubis spread

A

bedding, venereal transmission

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13
Q

What other name does phthirus pubis have

A

crabs/ crab louse

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14
Q

What diseases can lice vector

A

Typhus- Rickettsia prowazekii
Trench fever- also Rickettsia and pediculus humanus humanus
Relapsing fever- Borrelia recurrentis

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15
Q

What is use to control lice

A

DDT, permethrin, hygiene, washing clothes with heat

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16
Q

What is the scientific name for bed bugs

A

cimex lectularuis

17
Q

What do chronic infestations of bedbugs cause

A

loss of sleep, sores, iron and Hg deficiency

18
Q

What is the scientific name for Kissing bugs

A

Reduviidae

19
Q

What disease and parasite do kissing bugs vector

A

Trypanosoma cruzi-chagas disease

20
Q

What kind of mouthparts do fleas have

A

piercing-sucking mouthparts

21
Q

What is the scientific name for human fleas, what else does it infect

A

Pulex irritans, dogs, pigs, squirrels

22
Q

What are the scientific names for rat and cat fleas

A

rat-Xenopsylla cheopis

cat-Ctenocephalides felis

23
Q

What is the scientific name for Jigger/ Chiggoe fleas

A

Tunga penetrans

24
Q

What do Jigger fleas cause in humans

A

penetrates skin often feet, extreme irritation, itching, pain, inflammation, secondary infection, requires surgical removal

25
Q

What fleas caused the plague/ black death

A

plague/ black death- Yersinia pestis

26
Q

Explain what causes the plague to occur

A

bacterium that release toxins

27
Q

What flea vectors Typhys, what is the reservior animal, what is the parasite name

A

Xenopyslla cheopis, Rickettsia typhi, rats

28
Q

Explain how Typhus spreads

A

organisms enters human blood when rat feces are scratched into a flea bite wound or breaks of skin,

29
Q

What arthropod is responsible for the most deaths every year

A

diptera-flies, millions of deaths

30
Q

What disease do Sand Flies cause, what are the scientific names for it

A

Leishmania, Phlebotomus and Lutzomyia

31
Q

What diseases do culex mosquitoes cause

A

culex- western equine encephalitis

culex pipiens- Dirofilaria immitis, wuchereria bancrofti

32
Q

What are the 3 mosquito genera of most medical importance

A

anopheles
aedes
culex

33
Q

What diseases do Aedes mosquitos cuase

A

Aedes aegypti-yellow fever, dengue fever

34
Q

What diseases do anopheles mosquitos cause

A

malaria. plasmodium parasite

35
Q

What diseases do Black flies. deer flies and tsetse flies cause

A

black flies- onchocerca volvulus
deer flies- Loa loa
Teste flies- Sleeping sickness T brucei

36
Q

what is Myiasis, how does it occur

A

infestation of fly larvae, flies deposit eggs onto skin which burrow and penetrate wounds

Parasitology (18 decks)

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