L11: Lab 2

Question 1

hard ticks (ixodid) have a ____ stage life cycle

Answer 1

4 stages
egg
larva (6 legs)
nymph (8 legs)
adults (8 legs)

Question 2

Idoxes spp. have a _______ scutum, meaning…

Answer 2

inornate
meaning it lacks white, silver or gray coloration

Question 3

Ixodes spp. have a ______ basis capituli and ______ palps

Answer 3

rectangular
long

Question 4

what species of Ixodes is this

Answer 4

Ixodes scapularis
= eastern black legged deer tick

Question 5

what species of Ixodes is this

Answer 5

Ixodes pacificus = western black legged tick

Question 6

Rhipicephalus spp. have a _____ scutum, a _____ basis capituli and _____ palps

Answer 6

inornate scutum
hexagonal basis capituli
short palps

Question 7

what is the only member of the genus Rhipicephalus that occurs in North America

Answer 7

Rhipicephalus sanguineus
brown dog tick

Question 8

based on the shape of the this basis capituli (and the short palps), what species of tick is this

Answer 8

Dermacentor b/c rectangular basis capituli and short palps

Question 9

based on the shape of the this basis capituli (and the short palps), what species of tick is this

Answer 9

Rhipicephalus b/c hexagonal basis capituli

Question 10

what tick is this, how can you tell

Answer 10

Rhipicephalus sanguineus
inornate scutum
hexagonal basis capituli
short palps

Question 11

what tick is this, how can you tell?

Answer 11

Dermacentor spp.
ornate scutum
rectangular basis capituli
short palps

Question 12

what tick is this, how can you tell?

Answer 12

Ambylomma spp.
ornate scutum
rectangular basis capituli
long palps

Question 13

what are the 4 common tick genera found in the USA

Answer 13

• Ambylomma
• Dermacentor
• Ixodes
• Rhipicephalus

Question 14

what genera of tick have an ornate scutum

Answer 14

Ambylomma
Dermacentor

Question 15

what genera of ticks have an inornate scutum

Answer 15

Ixodes
Rhipicephalus

Question 16

how can you tell Ambylomma genera apart from Dermacentor

Answer 16

Ambylomma have long palps, whereas Dermacentor have short ones

Question 17

How can you tell Ixodes apart from Rhipicephalus

Answer 17

Ixodes have long palps while Rhipicephalus have short ones

Question 18

compared to hard ticks, soft (argasid) ticks are less commonly associated w/ _______ and transmit fewer ______

Answer 18

domestic animals
infectious agents

Question 19

do soft (asgarid) ticks have a scutum

Answer 19

no

Question 20

explain the soft tick life cycle

Answer 20

6 legged larval stage
multiple 8 legged nymphal stages

Question 21

in what species of soft ticks are only the larvae and nymph stages parasitic?

Answer 21

Otobuis

Question 22

the Argas spp. genera have a well defined __________ that the other 2 soft tick genera found in the US lack (Ornithodoros, Otobius)

Answer 22

lateral suture

Question 23

what is this tick, where is it found in the US

Answer 23

Argas persicus
found along Gulf Coast and Mexican border

Question 24

genera of tick that has a thick rounded body margin and a toothed hypostome

Answer 24

Ornithodroros spp.

Question 25

what species is this tick

Answer 25

Ornithodoros turicata

Question 26

what genera of tick has a thick, rounded body margin , a constriction at the midline and non-functional mouthparts with a reduced and toothless hypostome

Answer 26

Otobius spp.

Question 27

compared to hard and soft ticks, parasitic mites are ____

Answer 27

TINY <1mm in length

Question 28

what is the life cycle of a mite

Answer 28

six legged larval stage
one or more 8 legged nymphal stages
entire lifecycle occurs on same host

Question 29

what genera of mites is this

Answer 29

Demodex
* elongated body
* stumpy legs
* lack of hair like extensions

Question 30

what genera of mites have a roud, circular body shape, setae and other filamentous extensions on their body and legs. They also have a ventral anus

Answer 30

Sarcoptes

Question 31

how to tell Sarcoptes apart from Notoedres

Answer 31

Sarcoptes are larger and have a ventral anus

Question 32

this genera of mites are morphologically very similar to Sarcoptes mites but are _______ and have a _____ anus

Answer 32

smaller
dorsal anus

Question 33

genera of mites with an oval shaped body and long legs; they parasitize the outer surface of skin of their hosts

Answer 33

Otodectes

Question 34

what are the 2 major groups of lice

Answer 34

• Chewing (Mallophagan)
• Sucking (Anopluran)

Question 35

Chewing (mallophagan) lice afflict _______ and _______

Answer 35

birds and mammals

Question 36

Sucking (Anopluran) lice only parasitize _______

Answer 36

mammals

Question 37

since lice are highly host specific, knowing the _______ on which a louse is found helps to ID the louse

Answer 37

host species

Question 38

explain the life cycle of lice

Answer 38

the entire louse life cycle occurs on the same host, the eggs (nits) attach to the hosts hair/feathers and 3 nymphal stages precede the adult stage

Question 39

what group of lice has a head that is narrower than its prothorax

Answer 39

Sucking lice (anopluran)

Question 40

what group of lice has a head that is wider than its prothorax

Answer 40

Chewing lice (mallophagan)

Question 41

what species of lice is this

Answer 41

Heterodoxus spiniger
(Chewing lice)

Question 42

what species of lice is this

Answer 42

Linognathus setosus
(Sucking lice)

Question 43

_______ are wingless, laterally compressed insects that parasitize birds and mammals

Answer 43

fleas

Question 44

what is the only parasitic stage of the flea life cycle

Answer 44

adult