1/56
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced |
---|
No study sessions yet.
What structures form the stout tube of arthropod feeding
chelicerae
hypostome
As part of the stout tube, What is the purpose of the chelicerae
jaw-like cutting the epidermis
As part of the stout tube, What is the purpose of the hypostome
for blood feeding
With mechanical transmission of pathogens, how does the pathogen develop within vector
no development of pathogens w/in vector
With biological transmission of pathogens, how does the pathogen develop within vector
development of pathogen within the vector moving from gut to the mouthparts for transmission
In insecta life cycle. what are the two stages of complete metamorphosis (and their purpose)
juveline stage: larvae, maggots - for feeding and growth
adult stage: 3 pairs of legs w distinct head and abdomen - adults adapted for reproduction and disperal
In insecta life cycle, what stage has reorganization and reconstruction of the entire body during metamorphosis
pupa stage
In partial metamorphosis of insecta, juvenile stages are referred to as
nymphs
In partial metamorphosis of insecta, juvenile stages resemble what and what occurs with development after each stage
juvenile stages resemble adults and insect increases size at each stage
What are the characteristics of arachnida adults
4 pairs of legs in adults (and nymphs)
mouthparts and fused cephlaothorax
no antennae
(literally mites and ticks)
What is the four basic stages of arachnida (and leg number in each)
egg
larva - 3 pairs of legs
nymph - 4 pairs of legs
adult - 4 pairs of legs
What occurs between each arachnida life stage of development
moulting
When does mating occur in flea life cycle
only after a blood meal
With flea eggs, how do they develop in the environment
eggs fall off host and hatch yellow/white larvae that develop in carpets or bedding
With flea eggs, how long do eggs lay on host
Eggs lay on host for up to 20 days
What are flea larvae’s affinity with light and motion
flea larvae are negatively phototoxic (seeking darkness) and positively geotoxic (moving downwards)
True or false: flea larvae feed on organic material while residing in carpets and cracks
true
Flea larvae emerging from pupae, have what type of affinity with light and motion
novel adults are positively phototoxic (seeking light) and negatively geotoxic (moving upwards)
True or false: novel flea adults (from pupae) are negatively geotoxic and negatively phototoxic
false; novel flea adults (from pupae) are negatively geotoxic and positively phototoxic
True or false: novel flea adults (from pupae) are positively geotoxic and positively phototoxic
false; novel flea adults (from pupae) are negatively geotoxic and positively phototoxic
True or false: flea larvae are positively geotoxic and negatively phototoxic
true
How do you dx presence of fleas and flea feces
using flea comb to find fleas in pelage
place flea feces on moist cotton wool or white paper
True or false: may not be possible to find fleas on cats that are fastidious groomers
true
What are the two types of flies
non-biting flies
biting flies
In non-biting flies, how does their mouthpart work
mouthparts act like a slasher for secretions at mucus membranes of blood
In biting flies, how does their mouthpart work
mouthparts act like a piecer for secretions at mucus membrane or blood
What are the similarities between egg lifecycle of fleas and flies
both flea and fly eggs:
are laid onto host for up to 20 days
move off host into environment
What do fly eggs develop into
fly eggs develop into larvae, legless maggots
How do fly pupae and adult form
after three larval stages which develops into pupa stage into adult
In type I parasitic fly life cycle, what stages are parasitic and free-living
larvae are parasitic
adults are free-living (and non-parasitic)
(ex. bot flies)
In type II parasitic fly life cycle, what stages are parasitic and free-living
larvae are free-living (and non-parasitic)
adults are parasitic
(ex. mosquitos)
In type III parasitic fly life cycle, how do larvae develop and which stage are parasitic
larvae develop in mother fly
adults are parasitic
(ex. tsetse flies)
True or false: once removed from host, most lice will die within one month
false; once removed from host, most lice will die within one week
What are the two types of lice
chewing lice
sucking lice
In distinguishing between the different types of lice, what are the important characteristics of chewing lice
mouthparts do not piece skin
head is broader than thorax
In distinguishing between the different types of lice, what are the important characteristics of sucking lice
mouthparts piece skin and suck blood from capillaries and skin
head is narrower than thorax
How long is transition from lice egg to adult in a single host
2-3 weeks
What is the kryptonite for adults living on host
heavy rainfall
What type of metamorphosis does lice have
partial metamorphosis
Where can you identify lice
in wool/hair or skin
How can louse antigens be dx
through wool samples
What type of effect does chewing lice have on economic impact of sheep herds
lice infestion have no effects on liveweight or wool yield
heavy infection, however, leads to reduce wool quality
What is an economic importance to the tanning industry from chewing lice
cockle
What is an important differential dx for sheep scab
louse
What are the two types of mites
burrowing mites
non-burrowing mites
What is the difference between burrowing and non-burrowing mites in terms of skin lesions, leg length, and size
burrowing
burrow into skin
shorter legs
smaller
non-burrowing
live on skin surface and hair
long legs
larger
Where do all developmental stages occur with life cycle of mite (how long does life cycle take to complete)
occur on host taking 3-4 wks to complete
How do you dx burrowing mites using skin scrape methods
deep skin scraping
How do you dx surface parasitic mites using skin scrape methods
tape stripping or superficial skin scraping
How do you dx hair follicle mites using skin scrape methods
squeezing pustules onto a slide
What are the three ancillary dx tests for mites
hematology
biochem
serology
What are the two types of ticks
HARD ticks
soft ticks
What type of arthropods are ticks
temparay arthropods
How many pairs of legs does larval stage of ticks have
3 pairs of legs
How many pairs of legs does nymph/adult stage of ticks have
4 pairs of legs
What is the most appropriate tx of tick removal
apply 70% alcohol or liquid soap to a cotton ball covering tick; tick will move off skin and attach to cotton ball
Why should you not use hot match for tick removal
explode tick gut causing release of pathogens
blow more pathogens into the skin