Lecture 23

Question 1

What are resources for arthropods? (7)

Answer 1

o	Hair 
o	Skin 
o	Secretions 
o	Body fluids
o	Body tissues 
o	Excrement 
o	Domicile

Question 2

what are the arthropod ectoparasites of humans? (6)

Answer 2

• Bed bugs
• Fleas
• Lice
• Dust mites
• Follicle mites
• Scabies mites

Question 3

do bed bugs have wings?

Answer 3

no

Question 4

what type of development do bed bugs have?

Answer 4

• Hemimetabolous

Question 5

What do bed bugs feed on?

Answer 5

only blood

Question 6

bed bugs reproduce through _______ ______

Answer 6

traumatic insemination

Question 7

describe the reproductive process of bed bugs

Answer 7

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)

Question 8

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

Answer 8

♣ Ectospermalage
♣ Mesospermalege
♣ Seminal conceptacle

Question 9

Harbourage/refugium

Answer 9

where bed bugs hide while digesting blood meal

Question 10

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

Answer 10

frequently

decres

Question 11

do bed bugs only feed on humans?

Answer 11

no

Question 12

what type of development do fleas have?

Answer 12

• Holometabolous

Question 13

what do fleas feed on?

Answer 13

blood - specialist feeder on blood

Question 14

Describe the body shape of fleas

Answer 14

laterally flattened

Question 15

what is the host for fleas?

Answer 15

Most infest mammals, but some infest birds

Question 16

what is the most common pest flea in canada?

Answer 16

cat flea

Question 17

describe the setae of fleas

Answer 17

backward directed

Question 18

describe the larva of a flea

Answer 18

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

Question 19

what is the name of the mesoparasite flea?

Answer 19

chigoe flea

Question 20

describe the growth of the chigoe flea

Answer 20

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

Question 21

what type of development do lice have?

Answer 21

• Hemimetabolous

Question 22

Do lice have wings?

Answer 22

no

Question 23

what is the diet of lice?

Answer 23

blood

Question 24

What is the host of lice?

Answer 24

humans

Question 25

what are the 3 type of lice on humans?

Answer 25

head louse body louse pubic louse (crabs)

Question 26

what specialization do head lice have?

Answer 26

claws on tarsus to live in hair

Question 27

nits

Answer 27

eggs of head lice

Question 28

where do head lice lay their eggs?

Answer 28

cement onto hair follicles

Question 29

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

Answer 29

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

Question 30

how are head lice transmitted?

Answer 30

by fomites

Question 31

prevalence

Answer 31

prop of hosts infested (usually %)

Question 32

mean intensity

Answer 32

mean # of parasites per infested host

Question 33

where do body lice lay eggs?

Answer 33

on clothing

Question 34

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

Answer 34

body lice on clothing

Question 35

where do you commonly find body lice?

Answer 35

in areas of social strife (ex: war)

Question 36

what type of louse is a vector of typhus?

Answer 36

body lice

Question 37

how do you get rid of body lice?

Answer 37

wash clothes

Question 38

where do you find crab louse?

Answer 38

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

Question 39

are mites insects?

Answer 39

no, just arthropods

Question 40

what are dust mites vulnerable to?

Answer 40

desiccation

Question 41

what is a consequence of house dust mite infestation?

Answer 41

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

Question 42

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

Answer 42

follicle mites

Question 43

what mites have 4 pairs of legs?

Answer 43

follicle mites

Question 44

describe the spp of follicle mites

Answer 44

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

Question 45

what do follicle mites feed on?

Answer 45

oily secretions