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Fall 22: Parasites > 20. fleas > Flashcards

20. fleas Flashcards

1
Q

fleas are laterally or horizontally compressed?

A

laterally

small wingless, blood feeding insects

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2
Q
A

flea

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3
Q

what type of flea drinks blood

A

male and female adults

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4
Q

are fleas host specific?

A

no, jump from host to host

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5
Q

flea larva eat

A

adult poop that contains blood

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6
Q

fleas have how many legs

A

6, last pair used to jump

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7
Q

combs on fleas are also called

A

ctenidae

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8
Q

lifecycle of flea

A
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9
Q

what type of flea penetrates skin

A

tunga

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10
Q

— are fleas with long term attachment

A

echidnophaga (stick tight fleas)

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11
Q

dog and cat

A

Ctenocephalides

have eyes
pronotal and genal combs
rounded head
infect dogs and cats

transmit Dipylidium caninum, Rickettsia typhi (murine thyphus) and
Bartonella henselae (cat scratch disease)

bites cause itchiness and dermatitis

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12
Q

Ctenocephalides infect

A

dogs and cats

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13
Q

what do ctenocephalides look like

A

has eyes
pronotal and genal combs
rounded head

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14
Q

Ctenocephalides transmit

A

Transmit Dipylidium caninum, Rickettsia typhi (murine thyphus) and
Bartonella henselae (cat scratch disease)

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15
Q

rat

A

Xenopsylla cheopis

oriental rat flea
has eyes, no comb, rounded head

transmit plaque and murine thyphus

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16
Q

oriental rat flea transmit

A

plague and murine thyphus

XENOPSYLLA CHEOPIS
no comb, has eyes, rounded head

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17
Q

human flea is called

A

Pulex irritans

no comb, smooth head, has eyes

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18
Q

pulex irritans infect

A

humans, dogs, cats, rats, badgers, pigs

transmit Yersinia pestis (plague)

no comb, smooth head, has eyes

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19
Q

Pulex irritans transmit

A

transmit Yersinia pestis (plague)

no comb, smooth head, has eyes

human flea

20
Q

spilopsyllus cuniculi look

A

have eyes and both combs

live in ears of hosts- cats, dogs, rabbits

rabbit flea

21
Q

the rabbit flea is

A

Spilopsyllus cuniculi

eyes, both comb

live in ears of host

22
Q

Spilopsyllus cuniculi infect

A

dogs and cats that hunt rabbits

rabbit flea- live in ears of host

eyes and both combs

23
Q

Spilopsyllus cuniculi transmit

A

Myxomatosis virus

24
Q
A

ECHIDNOPHAGA GALLINACEA
stick- tight flea of birds

no combs, + eyes, head truncated

25
Q

Echidnophaga gallinacae infect

A

bare areas of the head, comb and wattles of poultry, can also infect cats and dogs

no combs, + eyes, head truncated

26
Q

lifecycle of Echidnophaga gallinacea

A

females burrow into the skin and remain there for 2-6 weeks

stick- tight flea of birds

no combs, + eye, head truncated

27
Q

signs of echidnophaga gallinacae infestation

A

ulceration and 2 o bacterial infection, anemia, reduced growth and poor egg production

Birds will be restless and often scratch the affected
areas

stick- tight flea of birds

no combs, + eye, head truncated

28
Q

jigger/chigger/chigoe flea are

A

tunga penetrans

infect humans and pigs

no comb, head truncated

29
Q

life cycle of tunga penetrans

A

Mating occurs on the skin surface

After fertilization, females burrow into the skin to form
a pocket

Once the females get engorged, they cause serious pain, inflammation, itching and ulceration

no combs, head truncated

30
Q

tunga penetrans infect

A

humans and pigs

mating on skin surface, then females burrow into the skin to form a pocket

31
Q

how to diagnose flea infestation

A

clinical signs, itchiness, flea dirt- blood

Check the animal body for the insect

Check the animal housing, beddings, rugs etc for adults, larvae or eggs

32
Q

control of fleas

A

Treat and prevent infestation on the host

Break the life cycle in the environment

Control the immune response to the flea alergens

33
Q

are small, dark brown, wingless and obligate blood-feeding insects

A

fleas

34
Q

comb by mouth is called

A

genal comb

35
Q

comb at back of head is called

A

pronotal comb

36
Q

fleas cause

A

flea bite/allergic dermatitis. This is a cutaneous hypersensitivity reaction to the salivary secretions of fleas during blood feeding characterized by severe itching and painful skin wounds which can be complicated by secondary bacterial infections

37
Q

life cycle of flea

A

complete- holometabolous

occurs mostly off host in environment

38
Q

Fleas have preferred hosts but in general are —

A

not strictly host specific.

39
Q

Some species (eg. —, the “sticktight flea”) are firmly, often permenently attached to the exterior of the host integument.

A

Echidnophaga gallinacia

40
Q

—, the chigoe flea)actually penetrate the outer layers of the host integument and develop within an intracutaneous pocket.

A

Tunga penetrans

41
Q

C. felis and C. canis may act as intermediate hosts of —

A

Dipylidium caninum.
(dog double pored tapeworm)

42
Q

Rodent fleas, Xenopsylla cheopis, and C. felis serve to transmit the causative agent — between reservoir hosts (rats, opossums) and to humans.

A

Rickettsia typhi

43
Q

— Block
development of immatures fleas

A

Growth reglators (“GR’s”, Third Generation insecticides)

44
Q

Inert microcrystalline materials; abrade waxy layer of
larval cuticle. Cause dessication.

A

Abrasive aerogels

45
Q

Systemic chitin synthase inhibitor administered to
host. When ingested by flea during bloodfeeding, prevents formation of cuticular structures in developing embryo and any hatched larvae

A

Metabolic inhibitor

Fall 22: Parasites (32 decks)

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