Final Exam Flashcards
Define Parasite
species that utilizes a host to thrive; benefit when the host is affected
Where are parasites found?
GI tract, fecal, skin/hair, ears, heart, blood, bladder, various tissues
Where are Ectoparasites found
outside of the body (fleas, ticks, mites)
Where are Endoparasites found
Inside of the body (tapeworms, roundworms, flatworms)
Stages of parasite life cycle, in order
egg, larvae, nymphs, pupae, adults
Definitive host
host that is infected by the adult stage of the parasite
Intermediate host
host infected/affected by the immature forms of a parasite
Nematoda
roundworms
Arthropoda
ectoparasites
platyhelminths
flatworms
protozoa
single-celled organisms
how many classes of anthropoids are there
2
Insecta –> Diptera
flies
insecta - phthiraptera
lice
insecta - Siphonaptera
fleas
insecta - Hymenoptera
wasps, bees, ants, hornets
Arachnida - Acari
mites, ticks
Arachnida - Araneae
spiders
Arachnida - scorpionida
scorpions
What do adult flies feed on?
secretions, blood
what is the family Culicidae and what do they act as a vector for?
Mosquitoes; heartworm, viral diseases, allergies
What is a fistula?
open passageway/abnormal connection between organs
how do you diagnose Cuterebra
CT scan
In the CT scan of Cuterebra, what does a gray to cream larva mean
2nd stage larva
In the CT scan of Cuterebra, what does a dark, thick larva mean
3rd stage larva
What is Mallophaga
Biting lice
What is Anoplura
Sucking lice
Trichodectes canis
dog biting lice
Felicola subrostrata
cat biting lice
How does lice differ from fleas?
fleas are not species specific
Symptoms of lice?
itching/scratching, Irritated skin; inflammation, Potential surface bleeding, Alopecia
How to treat lice
pyrethrins found in a topical ointment or shampoo
What multiple of their body weight do fleas consume in blood?
15 times
What health issues are associated with fleas
Anemia
How do we diagnose fleas
often see them with the naked eye; can use fecal matter
symptoms of fleas
itching/scratching, hair loss, rashes/bumps
how do we prevent and treat fleas
Adulticides (fipronil)
what is the flea life cycle
4 life stages; egg, larva, pupa (in a cocoon), and adult
What is difficult about eradicating fleas?
at some life stages they are resistant to insecticides and other flea control products
How do we eradicate fleas?
Insect growth regulators (Methoprene, fenoxycarb)
What makes up an arachnid
8 legs; 4 pairs Cephalothorax, Abdomen
What causes pets to be stung by pests?
curiosity, sniffing flowers, accidental nest disturbance, etc
Arachnid life cycle
4 stages; Egg, 6-legged larva, 8-legged nymph, 8-legged adult
what are the 3 classes of arachnids
Acari (mites/ticks), Araneae (spiders), and Scorpionida (scorpions)
what are the different types of mites
Sarcoptes
Notoedres
Trixacarus
what is mange
skin disease caused by mites
symptoms of mites
skin irritation, alopecia, abnormally thick skin
sarcoptes
itch mites
trixacarus
mite most common in guinea pigs
how do we treat sarcoptic mange
Topical treatment - selamectin; lime sulfur
Systemic parasiticide - ivermectin isoxazolines
How do we diagnose and treat otodectes cynotis?
diagnose by visualization or ear swab, and treat by topical/systemic acaricides
How are demodicidae different from the other types of mites we discussed?
present in small numbers
What are symptoms of demodicidae
alopecia, inflammation (red mange)
ixodidae vs argasidae
ixodidae are hard bodied where argasidae are soft bodied ticks
what diseases are ticks vectors for
lymes, rickettsial, tick paralysis
What is the difference between a one host tick and a two or three host tick
a one host tick uses one species the entire time
What are preventative methods for ticks
permethrin sprays
What are Nematoda also known as
roundworms
What is the infective stage of nematodes
3rd stage larva (L3)
How do nematodes infect people?
ingestion, vectors, transplacental
What are the classifications of nematodes?
6 orders, Rhabditida (threadworms), strongylida (bursate), ascaridida (ascarids), oxyurida (pinworms), spirurida (spirurid and filarial), Enoplida
Where do hookworms reside?
small intestine
what do hookworms feed on, and what health issue does it cause?
blood; anemia
symptoms of hookworms
black feces (tar-like), heavy load can cause death
how is hookworm transmitted
contaminated soil
How do we diagnose hookworm
ova in fecal matter
How do we treat hookworm
Pyrantel pamoate
How to prevent hookworm
proper husbandry, consistent removal of feces
Where is lungworm found
lungs; trachea/bronchi
how is lungworm transmitted
ingestion of L1 from another dog
where are the larvae in lungworm present
feces, respiratory system
how is lungworm treated
ivermectin, fenbendazole, albendazole
symptoms of large roundworms
vomiting/diarrhea, constipation, abdominal distension, stunted growth
how are large roundworms transmitted
placenta, nursing, injestion