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Insects > Lecture 23 > Flashcards

Lecture 23 Flashcards

1
Q

What are resources for arthropods? (7)

A 
o	Hair 
o	Skin 
o	Secretions 
o	Body fluids
o	Body tissues 
o	Excrement 
o	Domicile
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2
Q

what are the arthropod ectoparasites of humans? (6)

A
  • Bed bugs
  • Fleas
  • Lice
  • Dust mites
  • Follicle mites
  • Scabies mites
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3
Q

do bed bugs have wings?

A

no

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4
Q

what type of development do bed bugs have?

A

• Hemimetabolous

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5
Q

What do bed bugs feed on?

A

only blood

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6
Q

bed bugs reproduce through _______ ______

A

traumatic insemination

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7
Q

describe the reproductive process of bed bugs

A

Males have a long aedeagus to introduce sperm

Ectospermalege on females

aedeagus is inserted into the ectospermalege & through the female’s abdomen

Sperm accumulates in mesospermalege & is released into the hemolymph until it makes its way into the seminal conceptada (ovaries)

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8
Q

what are the components of the Paragenital sys of a female bed bug? (3)

A

♣ Ectospermalage
♣ Mesospermalege
♣ Seminal conceptacle

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9
Q

Harbourage/refugium

A

where bed bugs hide while digesting blood meal

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10
Q

The more _____ the female mates with males, her lifespan ______ b/c of the trauma experienced

A

frequently

decres

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11
Q

do bed bugs only feed on humans?

A

no

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12
Q

what type of development do fleas have?

A

• Holometabolous

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13
Q

what do fleas feed on?

A

blood - specialist feeder on blood

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14
Q

Describe the body shape of fleas

A

laterally flattened

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15
Q

what is the host for fleas?

A

Most infest mammals, but some infest birds

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16
Q

what is the most common pest flea in canada?

A

cat flea

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17
Q

describe the setae of fleas

A

backward directed

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18
Q

describe the larva of a flea

A

have a specialized knife like structure that cuts through the egg shell

no legs

lots of hair

Found in nest of host or envr

Feed on fecal pellets from the adults

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19
Q

what is the name of the mesoparasite flea?

A

chigoe flea

20
Q

describe the growth of the chigoe flea

A

Go to host, penetrate skin & then they undergo neosomy development to incres in size

21
Q

what type of development do lice have?

A

• Hemimetabolous

22
Q

Do lice have wings?

A

no

23
Q

what is the diet of lice?

A

blood

24
Q

What is the host of lice?

A

humans

25
Q

what are the 3 type of lice on humans?

A

head louse
body louse
pubic louse (crabs)

26
Q

what specialization do head lice have?

A

claws on tarsus to live in hair

27
Q

nits

A

eggs of head lice

28
Q

where do head lice lay their eggs?

A

cement onto hair follicles

29
Q

how do you determine if there is an infestation of head lice?

A

by the location of nits if it is near the scalp, no infestation

30
Q

how are head lice transmitted?

A

by fomites

31
Q

prevalence

A

prop of hosts infested (usually %)

32
Q

mean intensity

A

mean # of parasites per infested host

33
Q

where do body lice lay eggs?

A

on clothing

34
Q

what is the only louse that doesn’t lay its eggs hair/feathers of its host? where does it lay its eggs instead?

A

body lice

on clothing

35
Q

where do you commonly find body lice?

A

in areas of social strife (ex: war)

36
Q

what type of louse is a vector of typhus?

A

body lice

37
Q

how do you get rid of body lice?

A

wash clothes

38
Q

where do you find crab louse?

A

Found on parts of body where hair is thicker (Ex: eyelashes)

39
Q

are mites insects?

A

no, just arthropods

40
Q

what are dust mites vulnerable to?

A

desiccation

41
Q

what is a consequence of house dust mite infestation?

A

House-dust allergy: allergies in response to bodies of mites (molted exoskeletons) & mite feces

42
Q

what mites are too small to see with the naked eye?

A

follicle mites

43
Q

what mites have 4 pairs of legs?

A

follicle mites

44
Q

describe the spp of follicle mites

A

2 species on humans – 1 on hair follicles & 1 on sebaceous glands

45
Q

what do follicle mites feed on?

A

oily secretions

Insects (33 decks)

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