L11: Lab 2 Flashcards
hard ticks (ixodid) have a ____ stage life cycle
4 stages
egg
larva (6 legs)
nymph (8 legs)
adults (8 legs)
Idoxes spp. have a _______ scutum, meaning…
inornate
meaning it lacks white, silver or gray coloration
Ixodes spp. have a ______ basis capituli and ______ palps
rectangular
long
what species of Ixodes is this
Ixodes scapularis
= eastern black legged deer tick
what species of Ixodes is this
Ixodes pacificus = western black legged tick
Rhipicephalus spp. have a _____ scutum, a _____ basis capituli and _____ palps
inornate scutum
hexagonal basis capituli
short palps
what is the only member of the genus Rhipicephalus that occurs in North America
Rhipicephalus sanguineus
brown dog tick
based on the shape of the this basis capituli (and the short palps), what species of tick is this
Dermacentor b/c rectangular basis capituli and short palps
based on the shape of the this basis capituli (and the short palps), what species of tick is this
Rhipicephalus b/c hexagonal basis capituli
what tick is this, how can you tell
Rhipicephalus sanguineus
inornate scutum
hexagonal basis capituli
short palps
what tick is this, how can you tell?
Dermacentor spp.
ornate scutum
rectangular basis capituli
short palps
what tick is this, how can you tell?
Ambylomma spp.
ornate scutum
rectangular basis capituli
long palps
what are the 4 common tick genera found in the USA
- Ambylomma
- Dermacentor
- Ixodes
- Rhipicephalus
what genera of tick have an ornate scutum
Ambylomma
Dermacentor
what genera of ticks have an inornate scutum
Ixodes
Rhipicephalus
how can you tell Ambylomma genera apart from Dermacentor
Ambylomma have long palps, whereas Dermacentor have short ones
How can you tell Ixodes apart from Rhipicephalus
Ixodes have long palps while Rhipicephalus have short ones
compared to hard ticks, soft (argasid) ticks are less commonly associated w/ _______ and transmit fewer ______
domestic animals
infectious agents
do soft (asgarid) ticks have a scutum
no
explain the soft tick life cycle
6 legged larval stage
multiple 8 legged nymphal stages
in what species of soft ticks are only the larvae and nymph stages parasitic?
Otobuis
the Argas spp. genera have a well defined __________ that the other 2 soft tick genera found in the US lack (Ornithodoros, Otobius)
lateral suture
what is this tick, where is it found in the US
Argas persicus
found along Gulf Coast and Mexican border
genera of tick that has a thick rounded body margin and a toothed hypostome
Ornithodroros spp.
what species is this tick
Ornithodoros turicata
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
Otobius spp.
compared to hard and soft ticks, parasitic mites are ____
TINY <1mm in length
what is the life cycle of a mite
six legged larval stage
one or more 8 legged nymphal stages
entire lifecycle occurs on same host
what genera of mites is this
Demodex
* elongated body
* stumpy legs
* lack of hair like extensions
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
Sarcoptes
how to tell Sarcoptes apart from Notoedres
Sarcoptes are larger and have a ventral anus
this genera of mites are morphologically very similar to Sarcoptes mites but are _______ and have a _____ anus
smaller
dorsal anus
genera of mites with an oval shaped body and long legs; they parasitize the outer surface of skin of their hosts
Otodectes
what are the 2 major groups of lice
- Chewing (Mallophagan)
- Sucking (Anopluran)
Chewing (mallophagan) lice afflict _______ and _______
birds and mammals
Sucking (Anopluran) lice only parasitize _______
mammals
since lice are highly host specific, knowing the _______ on which a louse is found helps to ID the louse
host species
explain the life cycle of lice
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
what group of lice has a head that is narrower than its prothorax
Sucking lice (anopluran)
what group of lice has a head that is wider than its prothorax
Chewing lice (mallophagan)
what species of lice is this
Heterodoxus spiniger
(Chewing lice)
what species of lice is this
Linognathus setosus
(Sucking lice)
_______ are wingless, laterally compressed insects that parasitize birds and mammals
fleas
what is the only parasitic stage of the flea life cycle
adult
