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Parasitology Test 1
Random key points from Dr. Patton's classes
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02/15/2010

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Term
Parasitism
Definition
Relationship b/w parasite and host when 1 organism lives in/on another organism of different species for sustenence
Term
Endoparasite
Definition
Live adults stages inside host
Term
Ectoparasite
Definition
Live adult stages outside of host
Term
Aberrant parasite
Definition
Right host/wrong tissue
Term
Incidental parasite
Definition
wrong host completely
Term
Facultative parasite
Definition
takes advantage and lives as parasite w/n host but also can be free-living
Term
obligatory parasite
Definition
must have host!
Term
Hyperparasite
Definition
parasite of a parasite
Term
Definitive host
Definition
where parasite reaches sexual maturity
Term
Intermediate host
Definition
larval stages/development occur w/n it
Term
Paratenic host
Definition
no development occurs; just moves it!
Term
Vector
Definition
carry parasite from host to host; could be an intermediate host; 2 types: biological and mechanical
Term
Biological vector
Definition
some changes occur w/n this vector
Term
Mechanical vector
Definition
No development occurs w/n vector
Term
Reservoir host
Definition
keeps parasite in the environment; perpetuates infection; usually no disease caused in this host
Term
Direct life cycle
Definition
1 host (definitive host)
Term
Indirect lifecycle
Definition
Need multiple hosts (like intermediate host)
Term
another word for monospecific
Definition
Stenoxenous; very host specific
Term
Another word for Heterospecific
Definition
Euryoxenous; wide host range
Term
Parasitism vs. parasitosis
Definition
Parasitism has no disease while parasitosis is infection + disease
Term
What is usual cause of parasitic disease?
Definition
Bad management!
Term
What is the ultimate goal of parasite control?
Definition
Disruption of transmission!
Term
Where do Ancylostomoidea (Hookworms) live?
Definition
Small intestines
Term
Type of diarrhea from hookworms?
Definition
Melena--black tarry feces
Term
Melena
Definition
Black tarry feces from blood digestion
Term
Hookworm eggs?
Definition
thin shelled and morulated
Term
Infective stage of Hookworms?
Definition
L3
Term
Methods of transmission of hookworms
Definition
1- burrowing
2- Ingesting L3
3- Ingest paratenic host w/ L3
4- Lactogenic
Term
Hookworm of dogs
Definition
Ancylostoma caninum
Term
Can hookworms go into hypobiosis?
Definition
Yes!
Term
What is standard txt for hookworms
Definition
2,4,6,8 Pyrantel pamoate
Term
Where do Ancylostoma caninum live?
Definition
Small intestines
Term
Hookworms for cat
Definition
Ancylostoma tubaeforme
Term
How are Ancylostoma tubaeforme transmitted?
Definition
Ingestion; ingestion of paratenic host; burrowing; NO lactogenic transfer
Term
Ancylostoma braziliense favorite form of transmission?
Definition
Penetrate!
Term
Which ancylostoma species is not a voracious bloodsucker?
Definition
A. braziliense
Term
Hookworm for cattle
Definition
Bunostomum spp.
Term
Bunostomum affect on host?
Definition
Voracious bloodsucker in cattle; a few worms can cause major anemia
Term
Hookworm of swine
Definition
Globocephalus spp.
Term
Hookworm genuses
Definition
Ancylostoma; Uncineria; Bunostomum; Globocephalus
Term
Life cycle of Strongyles
Definition
Direct--no intermediate or paratenic hosts
Term
How are strongyles transmitted?
Definition
Ingestion of L3!!
Term
Infective stage of Strongyles
Definition
L3
Term
Where do strongyles live?
Definition
large intestines
Term
Which strongyles migrate?
Definition
Large strongyles (not cyathostomes)
Term
Most pathogenic strongylus spp.
Definition
Strongylus vulgaris
Term
Where does Strongylus vulgaris like to migrate?
Definition
Cranial mesenteric artery
Term
Verminous annuerism
Definition
thinning of blood vessel wall and bulges and thickening due to migrating Strongylus vulgaris in cranial mesenteric artery
Term
Most common strygulus sp.
Definition
Strongylus edentatus
Term
Where does strongulus edentatus like to go?
Definition
Goes to liver and migrates around and then in peritoneal cavity
Term
Clinical signs of strongylus vulgaris
Definition
-colic from mgirating
- diarrhea in young
-anemia
-poor coat
-enteritis
-death
Term
Which strongylus sp. isn't common to US
Definition
Strongylus equinus
Term
How deworm for Strongylus spp.
Definition
Every 5 months for 2 years since shorting PPP = 6 months
Term
Triodontophorus spp. host?
Definition
Horses
Term
Does Triodontophorus migrate?
Definition
No
Term
Most important parasite in horses today
Definition
Cyathostomes (small strongyles)
Term
Clinical signs of cyathostomes?
Definition
-colic
-diarrhea b/c destroy gut
- cachexia and anorexia
-loss of intestine's absorptive function
Term
How ID cyathostomes?
Definition
corona radiata, red, small buccal cavity
Term
larval cyathostomosis
Definition
disease from all hypobiotic larvae eruptiong from tissue in gut at once!
Term
What damage is caused by cyathostomes?
Definition
Damage from awakening form hypobiosis and emerging simultaneously and destroying mucosa and tissue
Term
Egg reappearance period
Definition
interval b/w txt and reappearance of egg shedding
Term
strategic txt of strongyles
Definition
exploit seasonal patterns of strongyle transmission and get long term relief from infection by timing txts
-deworm horses from Sept-->March and begin again in September
Term
What is Chabertia spp. other name
Definition
Large mouth bowel worm
Term
definitive host of chabertia spp.
Definition
Ruminants, mostly sheep and goats
Term
do chabertia migrate?
Definition
NO
Term
Damage done by Chabertia?
Definition
bloodsucker!
Term
Another name for Oesophagostomum?
Definition
Nodular worm
Term
Definitive host of Oesophagostomum?
Definition
cattle, sheep, goats, pigs, gorillas
Term
where do Oesophagostomum live?
Definition
large intestines
Term
Oesophagostomum species of swine?
Definition
Oesophagostomum dentetum
Term
What causes damage of Oesophagostomum?
Definition
When worms emerge from nodules into large intestines; get diarrhea and allergic response
Term
What is another name for Stephanurus?
Definition
Swine kidney worm
Term
What is D.H. of stephanurus spp.
Definition
Swine
Term
Where do Stephanurus live?
Definition
In perirenal fat around kidney and eggs pass in urine
Term
How are eggs of Stephanurus shed?
Definition
Urine
Term
Where do Staphanurus migrate to?
Definition
From blood to liver to kidney fat!
Term
Where do Staphanurus like to migrate?
Definition
In the liver; causes lots of problems before they go to perirenal fat.
Term
Main clinical sign of Staphanurus infection?
Definition
Liver disease
Term
Infective stage of Trichostrongyloides
Definition
L3
Term
Another way to describe Trichostrongyle infectins?
Definition
GIN-Gastrointestinal nematodes
Term
Where Trichostrongylus axei live?
Definition
Abomasum
Term
Where do Ostertagia live?
Definition
Abomasum of ruminants
Term
What is most important parasite of cattle?
Definition
Ostertagia
Term
What is infective stage of Ostertagia?
Definition
L3
Term
What is characteristic sign in necrospy of Ostertagia infection?
Definition
Moroccan leather lining of Abomasum from worms emerging from parietal glands
Term
Who causes moraccon leather in abomasum?
Definition
Ostertagia
Term
Where do larvae emerge from in Ostertagia infections?
Definition
Parietal glands
Term
Clincal signs of Ostertagia infection?
Definition
Severe diarrhea; weight loss; bottle jaw; anemia; anorexia; loss of digestive function
Term
Type I ostertagia infection
Definition
in calves in 1st season on pasture; get diarrhea; no arrested development
Term
Type II ostertagia infection
Definition
result of larvae in hypobiosis waking up at same time; happens normally in older cows; see in the summer/early spring in the North and fall in the South.
Term
When see Ostertagia infection in Tn?
Definition
Early fall
Term
When see Ostertagia infection in the north
Definition
late spring/summer
Term
When give dewormer for Ostertagia for cattle living in the south?
Definition
Mid summer to kill hypobiotic larvae before emerge in early fall!
Term
Ostertagia and cyathostomes are both a result of large numbers of larvae resuming development and emerging? T or F.
Definition
True!
Term
Trichostrongyloid of sheep and goats?
Definition
Telodorsagia
Term
Parasites found in abomasum of ruminants
Definition
H-O-T. Haemonchus, Ostertagia, Trichostrongylus axei
Term
Barber pole worm
Definition
Haemonchus
Term
Another name for Haemonchus.
Definition
Barber pole worm
Term
What is pathophysiology of Haemonchus?
Definition
VORACIOUS BLOOD SUCKER
Term
Where does Haemonchus live?
Definition
Abomasum in ruminants, mostly sheep!
Term
What is most important parasite of sheep and goats?
Definition
Haemonchus
Term
Types of eggs seen with Haemonchus?
Definition
Thin shelled and morulated and see TONS of them!
Term
Clinical signs of Haemonchus infection?
Definition
severe anemia; bottle jaw from hypoproteinemia; high fecal egg count; no diarrhea b/c lose so much blood
Term
FAMACHA
Definition
routine check for anemia in sheep and goats to determine if need txt for Haemonchus infection; do this instead of overtreating herd and breeding resistant worms
Term
Infective stage of Haemonchus?
Definition
Ingestion of L3
Term
Where does Cooperia sp. live?
Definition
Small intestines!
Term
Host of Cooperia sp.
Definition
ruminants
Term
Which worm has large football shaped eggs?
Definition
Nematodirus sp.
Term
What is the Payton Manning worm?
Definition
Nematodirus sp.
Term
Most important parasite in severely anemic lambs?
Definition
Haemonchus
Term
Host of hyostrongylus sp.
Definition
Swine
Term
Where do Hyostrongylus live?
Definition
Stomach
Term
What is the vomiting worm?
Definition
Ollulanus sp.
Term
Where do Ollulanus sp. live?
Definition
Stomach of cats
Term
What is live cycle of Ollulanus?
Definition
Ovoviviparous-whole life cycle occurs w/n host!
Term
Clinical signs of Ollulanus sp. infection?
Definition
gastric distress-vomiting!
Term
How Ollulanus sp. transmitted?
Definition
cats eat vomit with worms in it.
Term
How ID Ollulanus infection?
Definition
Look in vomit, gastric lavage
Term
Infective stage of Metastrongrloidea (Lungworms)
Definition
L3 ingestion
Term
What shed by host of Metastrongyloidea
Definition
leave as larvae, not eggs!
Term
How diagnose lungworm infection?
Definition
Baermann's apparatus or zinc sulfate float
Term
Are lungworms migratory?
Definition
Yes, go from ingestion into intestines into lymphatics to respiratory pathway
Term
What is "Husk" a good sign of?
Definition
Dictyocaulus infection
Term
how prevent Dictyocaulus infection?
Definition
Keep off moist pasture
Term
HOw do horses get Dictyocaulus infections?
Definition
from donkeys! D. arnfieldi
Term
Clinical signs of Dictyocaulus infection
Definition
coughing, edemia in lungs, HUSK (gasping breathing)
Term
How DX dictyocaulus infection?
Definition
Baermann's apparatus
Term
How do sheep and goats get Muellerius?
Definition
From ingesting of snails/slugs with L3s
Term
Where do Muellerius worms live?
Definition
In lung parenchyma of sheep and goats
Term
What physical characteristics do Muellerius worms have?
Definition
Kinky tails and spines
Term
What is lungworm of cat?
Definition
Aelurostrongylus
Term
What is lungworm of horse?
Definition
Dictyocaulus westeri
Term
How do cats get infected with Aelurostrongylus?
Definition
ingestion of paratenic hosts (amphibians, reptiles, birds, rodents) that have ingested snails and slugs
Term
How physically ID Aelurostrongylus infections
Definition
kinky tail and spine, like Muellerius
Term
Who has kinky tails and spines?
Definition
Muellerius sp., Aelurostrongylus sp., and Angiostrongylus vasorum
Term
Clinical signs of Aelurostrongylus infection?
Definition
respiratory distress
Term
Where do Aelurostrongylus sp. live in cat?
Definition
pulmonary artery, lung parenchyma, bronchi/trachea
Term
What is dog lungworm?
Definition
Filaroides sp.
Term
Where do Filaroides sp. live?
Definition
Lung parenchyma of dogs
Term
How infected with Filaroides
Definition
dog ingests larvae in feces
Term
What is infective stage of Filaroides
Definition
L!
Term
What is lungworm of pigs?
Definition
Metastrongylus
Term
What do pigs shed when infected with Metastrongylus?
Definition
Thick shelled larvated eggs, not larvae like the rest of the lungworms!
Term
Which parasite is the exception to the larvae shedding in Metastrongyloides
Definition
Metastrongylus-swine lungworm
Term
What is the "French/Fox lungworm"
Definition
Angiostrongylus vasorum
Term
How physically ID Angiostrongylus vasorum?
Definition
kinky tail and spine
Term
Clinical signs of Angiostrongylus vasorum?
Definition
Hypertension, coughing, dyspnea, exercise intolerance--looks like Dirofilaria immitis infection!
Term
Where find Angiostrongylus vasorum?
Definition
UK, Europe, Canada
Term
Which superfamily are the facultative parasites?
Definition
Rhabditoidea - Rhabditis, Halicephalobus, Strongyloides
Term
Eggs of rhabditoidea?
Definition
Thin shelled, small and larvated
Term
How Rhabditis enter host?
Definition
Invade through skin
Term
Clinical sign of rhabditis sp.?
Definition
Dermatitis
Term
How diagnose Rhabditis?
Definition
skin scrape
Term
Where does Halicephalobus live?
Definition
get in skin of horse and goes to blood and can get to kidney, or go to head and jaw, and to brain and get neuro problems
Term
How Halicephalobus get in host?
Definition
puncture so it can enter skin
Term
Host of Halicephalobus?
Definition
Horse
Term
Where do Strongyloides live?
Definition
Small intestine of mammals, birds, and reptiles
Term
What is the intestinal threadworm?
Definition
Strongyloides
Term
How Strongyloides transmitted?
Definition
Ingest L3, penetrate skin, lactogenic transfer
Term
How Strongyloides transmitted?
Definition
Ingest L3, penetrate skin, and lactogenic transfer
Term
What disease caused by Strongyloides?
Definition
Parasite of VERY young, invade small intestines, get diarrhea
Term
Is Strongyloides zoonotic?
Definition
Yes, cutaneous larval migrans
Term
Where do Ascarids live?
Definition
Small intestine
Term
Unique physical characteristic of Ascarid
Definition
3 conspicuous lips
Term
Eggs of Ascarids
Definition
Thick albuminous shell with 1 cell inside
Term
What is infective stage of Ascarid?
Definition
L2 w/n egg
Term
Ascarids are zoonotic?
Definition
Yes, can cause visceral larval migrans
Term
Do Ascarids migrate?
Definition
Yes, go to liver and lungs and end up in small intestines
Term
Ascarid of swine
Definition
Ascaris suum
Term
What are eggs of Ascaris suum like?
Definition
Thick, mamillated egg (big bumps along edge)
Term
What is characteristic sign of Ascaris suum?
Definition
Milk spots in liver from migrating larvae! can be lethal
Term
What is pathophysiology of ascaris suum?
Definition
Migration in liver! get milk spots; can go to lungs and get respiratory signs as well
Term
How Ascaris suum transmitted?
Definition
Ingestion of L2 w/n egg; NOT lactogenic
Term
What causes milk spots on liver?
Definition
Ascaris suum
Term
What is host of Parascaris equorum?
Definition
Horses
Term
Ascaris of horse
Definition
Parascaris equorum
Term
Where Parascaris equorum live?
Definition
Small intestine
Term
Clinical signs of Parascaris equorum?
Definition
colic, malnutrition, and diarrhea- can get rupture of colon
Term
When deworm for Parascaris?
Definition
start at 2 month old and give every 2 months for 2 years! do every 2 months so dont get too big
Term
Ascarid of cat
Definition
Toxocara cati
Term
Physical ID of toxacara cati?
Definition
cervical alae looks like arrow head!
Term
What kind of transmission for toxocara cati?
Definition
NO prenatal; sometimes lactogenic, paratenic hosts crucial; ingestion of L2 larvated egg
Term
Clinical signs of Toxocara cati
Definition
diarrhea, potbelly, poor hair coat, malnutrition, vomiting
Term
Ascarid of dogs
Definition
Toxocara canis
Term
clinical signs of Toxocara canis?
Definition
potbelly, vomiting
Term
Types of transmission of toxocara canis?
Definition
Ingestion of larvated L2 eggs, paratenic hosts, and cross placental, so decreases PPP to about 2 weeks
Term
Is Toxocara canis zoonotic?
Definition
Yes, Visceral larval migrans and ocular larval migrans
Term
Hosts of Toxascaris?
Definition
Cats, dogs, and wild cats and dogs
Term
What do Toxascaris eggs look like?
Definition
eggs have NO pits and wavy inner membrane
Term
clinical sign of Toxascaris?
Definition
diarrhea
Term
Do Toxascaris migrate?
Definition
no!
Term
Is Toxascaris zoonotic?
Definition
No.
Term
Who see Toxascaris in mostly?
Definition
Tigers
Term
LIfe cycle of pinworms
Definition
ingestion of eggs, go to GI and Large Intestines, hatch, molt, lay eggs around anus, and get ingested
Term
Migration in pinworms?
Definition
No
Term
Who has obvious bulb on end of esophagus?
Definition
pinworms!
Term
Eggs of pinworms
Definition
thin shelled, assymetrical
Term
Pinworm of horse
Definition
Oxyuris sp.
Term
Infective stage of Oxyuris?
Definition
larvated egg
Term
Clinical sign of Oxyuris?
Definition
irritation/tail rubbing
Term
Diagnosis of Oxyuris?
Definition
tape around anus; put under microscope and examine
Term
Where does Probstymayria live?
Definition
IN horses' large intestine
Term
Where Osyuroidea live?
Definition
Large intestine
Term
Pinworm of sheep and goats
Definition
Skrjabinema
Term
Common name of Trichinelloidea
Definition
Whip worms/ capillary worms
Term
Infective stage of Trichinelloidea/Whip worms?
Definition
larvated egg!
Term
Physical characteristic of Trichinelloidea to ID
Definition
stichosome
Term
Who has stichosome
Definition
trichinelloidea/whip worms
Term
Eggs of Trichinelloidea/whip worms?
Definition
eggs w/ polar plugs; symmetrical
Term
What worm if see copulatory bursa in dog?
Definition
Hookworm
Term
What worm w/ copulatory bursa in horse?
Definition
Strongyle
Term
What worm with copulatory bursa in cattle?
Definition
GIN
Term
Life cycle of trichinelloidea?
Definition
matures in cecum, lay eggs, pass in feces, larvate in environments, ingest larvated egg, hatch in stomach, go to SI,burrow and molt, and mature in cecum
Term
where whipworms live?
Definition
Cecum/LI
Term
Where Trichuris live?
Definition
large intestine/cecum
Term
how resistant are Trichuris eggs?
Definition
very resistant! live for years!
Term
What Trichuris does in pigs?
Definition
causes severe diarrhea! stunts growth; very bloody diarrhea
Term
tenesmus
Definition
straining to urinate/defecate
Term
hematochezia
Definition
passing of bloody stool
Term
whipworm of dog
Definition
Trichuris vulpis
Term
Clinical signs of Trichuris vulpis
Definition
bloody stool, flatulence, tesemus, hematochezia, LARGE BOWEL D+
Term
Are Trichuris zoonotic?
Definition
no
Term
Which worms have eggs w/ polar plugs?
Definition
Whip worms, capillaria
Term
Capillaria putorii host?
Definition
mustelids, cats, swine, racoons--mostly mink in stomach or intestine
Term
Where capillaria aerophila live?
Definition
lung of dog, cat, fox, raccoons
Term
infective stage of Capillaria?
Definition
larvated egg
Term
Clinical signs of Capillaria aerophila?
Definition
COUGH and bronchitis
Term
What is nasal worm?
Definition
Capillaria bohmi
Term
Where Capillaria bohmi live?
Definition
Nasal passage of dog and fox
Term
Clinical sign of Capillaria bohmi?
Definition
sneezing, sniffling, shaking head
Term
Which capillaria do you look for in urine?
Definition
Capillaria plica, Capillaria feliscati
Term
Which Capillaria do you check for in fecal?
Definition
Capillaria aerophila, Capillaria bohmi, Capillaria putorri, Capillaria hepatica
Term
What is bladder worm of dog?
Definition
Capillaria plica
Term
What is bladder worm of cat
Definition
Capillaria feliscati
Term
What is Capillaria of liver?
Definition
Capillaria hepatica
Term
What is life cycle of Caillaria hepatica?
Definition
lives in liver, lay eggs, in parenchyma of liver,stay in liver, can't become adult b/c O2 too low so have to wait for host to die
Term
What is physical characteric of Filaroide?
Definition
spirally coiled tail
Term
Do Filaroide migrate?
Definition
yes!
Term
Name for heartworm?
Definition
Difilaria immitis
Term
PPP of Difilaria immitis?
Definition
6 months from infection to MF
Term
What are microfilaria?
Definition
immature L1s
Term
Infective stage of Difiliaria immitis?
Definition
L3
Term
average number of heartworms when disease?
Definition
14
Term
Clinical signs of Difilaria immitis?
Definition
COUGHING, EXERCISE INTOLERANCE, DYSPNEA; weight loss, anemia, heart enlargement, hypertension
Term
Why put heartworm disease treated dogs excercise restriction?
Definition
prevent pulmonary emboli and thrombosis
Term
Txt for Difiliaria immitis?
Definition
Immiticde 2.5 mg/kg twice w/ 24 hours apart for 90% efficacy; or 3 injections for 98% efficacy but wait 1-2 months b/w 1st and 2nd injection
Term
Heartworm test of choice for dog?
Definition
Antigen test
Term
What causes pulmonary thromboemboli in heartworm treated dogs?
Definition
reaction to worm dying
Term
how check for MF for difilaria immitis?
Definition
Knott's test/filter test
Term
What does heartworm antigen test check for?
Definition
female antigen from uterus and if have lots of males, could detect as well
Term
How are dogs infected by show up MF negative?
Definition
1- immature worms
2- only males or females so no mating
3- heart worm prophylaxis
4- immunological occult (make anitbodies and tie up MF so don't circulate MFs)
Term
When get + serology results for heartworm test if positive?
Definition
about 5 months (and about 6 months for MF)
Term
What reasons explain a negative serology test when actually positive?
Definition
1- immature worms
2- males only
3- too few worms
4- antigen sequestration
Term
Where are adult heartworms found in assymptomatic animals?
Definition
pulmonary arteries
Term
When do Knott's Test?
Definition
Whenever have + antigen test to see what is going on
Term
How diagnose heartworm disease?
Definition
fecal; x rays for right heart enlargement, coughing, serology, EKG, CBC, arteriogram
Term
Life cycle of Dirofilaria immitis?
Definition
females produce microfilaria; mosquito ingests; Mf develop into L3 w/n mosquito; mosquito bites and transfers to DH, molt and migrate thru CT to pulmonary artery as immature adults and mature
Term
How does heartworm prophylaxis work?
Definition
reach back effect--kills L3 and L4s
Term
What age start heartworm prophylaxis?
Definition
8 weeks
Term
How confirm successful heartworm treatment?
Definition
do antigen tests 6 months after last treatment
Term
What does "soft kill" fo rheartworms mean?
Definition
Ivermectin as an adulticide; works on worms 8 months and younger; not good b/c always have dying worms which is cause of pathophysiology; can option if can't afford other txt
Term
What use to kill microfilariae
Definition
use ivermectin if TONS b/c slower, or Milbemycin if not so many; may need to pretreat w/ steroids to rpevent shock!
Term
Do cats have circulating MF w/ D. immitis?
Definition
no!
Term
clinical signs of dirofilaria in cats?
Definition
dyspnea, coughing, vomiting, arteries inflammed, lungs inflamed
Term
What test to check for heartowrms in cats?
Definition
antigenAND antibody test
Term
HARD
Definition
Heartworm Associated Respiratory Disease
Term
TXt for heartworms in cats
Definition
Prednisone mainly, can do surgery
Term
how diagnose heartowrms in cats?
Definition
-do antibody and antigen test
-respiratory disease
- cardiac disease
-chronic vomiting
- exposure to mosquitoes
Term
What does antibody test tell you in cats?
Definition
That they are exposed and have been infected! not necessarily that they have adult worms but have seen L3s!
Term
What is commonly mistaken for dirofilaria microfilariae
Definition
Acanthocheilonema reconditum (Dipetalonema)
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