Parasit - Lab Quiz 6

drraythe's version from 2015-08-31 03:55


Nematodes general

Question Answer
What is their "skin" like?They have a tegument w/ 2 layers- outer cuticle & inner hypodermis
What are their muscles like?They have 2 muscle types:
(1) unspecialized, somatic, longitudinal mm
(2) Adaptable, specialized mm
Describe their digestive system/tractMouth, +/- buccal capsule, muscular esophagus, intestine, rectum, anus
How can you sex a nematode?Male has a little curve at the end of his tail, females do not but are larger
What is their lifecycle like?2 diff lifecycles:
(1) Direct- DH eats infective stage (L3!!)
(2) Indirect- DH produces egg → larvae → microfilariae. Micro is ingested by IH (earthworm, insect, whatever). Infective stage develops in IH. DH eat IH, or IH bites DH & transmits infective stage
What are the life stages of nematodes? What are they doing?Egg → L1-3 (in IH) → rest of L stages & adult in DH. L1-3 can be free living or in IH. L3 is infective stage (except ascarids, then it's L2(egg) )
What is Oviparous? Who does this? Why would you do this?Means they have unembryonated eggs. This is the case for ascarids & hookworms. Means eggs are very resistant to enviro.

Ascarids/roundworms ("intestinal roundworms")

Question Answer
What is the infective stage of ascarids?Ingestion of infective eggs, stage 3!
Once the infective stage is consumed, how do the larvae migrate?Hepato-tracheal migration
Clinical signs of ascarid infection are? (Resp system? GI? Skin? Abdominal cavity? Overall? )Verminous pneumonia (summer colds), Enteritis, Reduced growth, Dull hair coat, dry skin, Distended abdomen, Peritonitis, Aberrant migration results in CNS signs & Suppurative nephritis.
Aberrant migration of ascarids results in? (Clinical signs)CNS signs & Suppurative nephritis.
Cerebrospinal nematodiasis?BAYLISASCARIS PROCYONIS


Question Answer
Affects who?Piggies
What do the roundworms look like as adults?Large, stout, pinkish white to cream colored
What do the eggs of A. suum look like? Where are they usually found?Eggs- brownish yellow, thick shelled (very resistant in environment). Usually found in soil, or stuck to mammary skin of sow
Is A. suum zoonotic?Yes
How is the DH infected?Direct (ingestion of infective eggs) [hepatotracheal migration]
How is the liver affected?"MILK SPOTS" are areas of inflammation & healing fibrosis due to migration (hepatotacheal )
What is thumps?Cough caused by A. suum infxn
Clinical signs?Milk sports, verminous pneumonia, peritonitis, cough (thumps), edema, emphysema, diarrhea, death.
RememberHumans drinking pig liver milk are gonna get thumped (humans=zoonotic. pig=sp affected. milk=milk spots. thumps=cough)


Question Answer
Affects who?Rumis
What does the adult of T. vitulorum look like?Large, stout, 3 lips
Where is T. vitulorum, geographically?Found in tropical & subtropical areas
What is the lifecycle of T. vitulorum?Direct, DH eats eggs
How does T. vitulorum migrate?DEPENDS ON AGE OF DH. (1) Calves <4mo = hepatotracheal migration
(2) Calves>4mo = somatic migration
Prognosis of T. vitulorum infection?Natural expulsion & self cure
Transmission of T. vitulorum?Transplacental & transmammary!
Pathology/clinical signs of T. vitulorum?Verminous pneumonia, Diarrhea, Enteritis, Intestinal obstruction & Perforation.
Remember3 rumi's traveled to the tropics on a 3-lipped TRANSport(they rode on boobs & placentas). They found out when they got there that their age mattered, & only the bodies of the 4mo (RUMI HAS 4 STOMACHS) got through, whereas the younger 1s got punched in the liver & ass & got sent back.
Is T. vitulorum zoonotic?No. rumis are too different from people, unlikes pigs, cats, & dogs


Question Answer
T. canis affects who?Doggies
How do adults of T. canis look?HAVE Lateral cervical alae- wings present on anterior end
What do the eggs of T. canis look like?They are round w/ thick, finely pitted shells
How is T. canis transmitted?TRANSPLACENTAL, transmammary rare
Lifecycle of T. canis?(Can be transplacental) Direct, ingestion of eggs → IS A PARATENIC HOST, RODENTS
How does T. canis migrate?DEPENDS ON AGE. <3mo=hepatotracheal. >3mo=somatic
Is T. canis zoonotic?Yes
Clinical signs?DOGS= Abdominal discomfort, Pot belly appearance, Straddled walk, Intestinal obstruction, CNS signs, Retinal lesions (rare) & Death. HUMANS= visceral & ocular migrans
RememberDog isnt your best friend when it puts worms into your eyes & organs. But how can you resist an adorable 3 month old puppy? When the worms stop going from a rat, through its liver & into its body, that's how. It's not the puppy’s fault it was infected before it was even born! If it dies, the winged worm will fly out w/ the puppy, laying its pitted-moon eggs in the sky


Question Answer
Affects who?Kitties
What does the T. cati adult look like?Large striated cervical alae (arrowhead shaped)
What does the egg of T. cati look like?Egg-pitted but smaller than T. canis
What is the lifecycle of T. cati?Can be direct by ingestion of eggs, OR PARATENIC HOST=RODENT. (Also transmammary)
Transmission of T. cati?TRANSMAMMARY (opposite of dog's transplacental, of course. Bc cat)
Is T. cati zoonotic?Yes
Clinical signs of T. cati?CATS= Diarrhea, Unthrifty appearance & pot belly. HUMANS= visceral & ocular migrans
REMEMBERI'm going to think of Focker milking a cat, & he gets it in his eyes & into his organs, because the worms FLY(wings) out like ARROWS & will also hit some yummy rats for the cat before going to the moon (pitted)


Question Answer
Affects who?Cats & dogs
What does the adult look like?Has narrow cervical alae
What do eggs of T. leonina look like?Ovalish w/ smooth outside & bumpy inside
Lifecycle?Ingestion of egg OR paratenic host (rodent)
Migration?NO MIGRATION!!!! Hatch in intestine, mature in wall of intestine, & re-enter lumen
REMEMBERLEONA really loved shit, didnt want to deal w/ livers & all that, unless it was feeding rat livers to her cats & dogs. She might have appeared smooth to the outside world, but she was bumpy on the inside


Question Answer
Affects who?RACCOON ROUNDWORM. Can reach maturity in dogs tho.
Lifecycle?Eat eggs or paratenic host
Migration?NO. Hatch in intestine, mature in wall of intestine, & re-enter lumen
Clinical signs?IN HUMANS: Humans- Visceral larva migrans & cerebrospinal nematodiasis
REMEMBERA raccoon at your bay is scary, it only gives a shit(intestine mature) about driving people INSANE(cerebrospinal nematodiasis)


Question Answer
Not zoonotic 1Bunostomum trigonocephalum (sheep & goats TRI to hurt ppl but dont)
Teeth 1s (not cutting plates)ANCYLOSTOMA CANINUM, ANCYLOSTOMA TUBAEFORME, ANCYLOSTOMA BRAZILIENSE (Brazilian dogs & cats who can play tuba will BITE (teeth) the shit outta you)


Question Answer
What does adult look like?3 pairs of teeth
How can you get A. caninum?Ingestion of larva, skin penetration, transmammary, transplacental, & ingestion of paratenic host
Clinical signs?DOGS/cats/bears: Bloody stool, normocytic, normochromic anemia → hypochromic, microcytic anemia, death, stunted growth, dry hair coat, dermatitis, lower PCV & Hb, malnourished appearance
HUMANS: Humans- cutaneous larva migrans/creeping eruption & eosinophilic enteritis
REMEMBERDog w/ 3 teeth can get infected so many ways. No matter what, w/ all those teeth gone it's going to be anemic. Till make ppls skin crawl


Question Answer
What does the adult look like?3 pairs of teeth
Affects who?Cats (tuba full of cats)
How do you get A. tubaeforme?Ingestion of larva, skin penetration, ingesting paratenic host
Clinical signs?CAT= *Bloody stool, lower PCV & Hb, weight loss, normocytic, normochromic anemia → hypochromic, microcytic anemia. HUMANS: Humans- cutaneous larva migrans
REMEMBERTuba full of cats is 3x the fun! The cats will land & bleed till they get anemia though, & that makes my skin crawl


Question Answer
Affects who?Dogs & cats (both are present in Brazil)
What does the adult look like?2 ventral teeth
How do you get A. braziliense?Ingestion of larva, skin penetration, ingesting paratenic host
Clinical signs?DOGS/CATS= Hypoproteinemia, hemorrhagic enteritis & ulcers. HUMANS= CLM
REMEMBERBrazilian cats & dogs are 2 things that can bleed enough to make my skin crawl


Question Answer
Affects who?Dogs (think sled dogs in the north, stenotic vessels bc so cold)
Adult looks like?CUTTING PLATES in buccal cavity
How do you get U. stenocephala?Ingestion of larva (more common), skin penetration
(zoonotic? she didnt actually mention but )Yes
Clinical signs?Dermatitis, Hypoproteinemia, Pneumonia, Lung consolidation
REMEMBERIn the north its so cold it makes my BVs stenotic. Huskies will do just fine though, even if they only survive by eating grubs. Their lungs might get sick from the cold tho

Bunostomum phlebotomum/ cattle hookworm

Question Answer
Adult looks like?cutting plates
How do you get B. phlebotomum?Mainly skin penetration
Clinical signs?CATTLE= Dermatitis, diarrhea, weight loss, anemia, bottle jaw, emaciation. HUMANS= CLM
REMEMBERPhlebotomy on a cow is easy w/ suck big veins! You can collect all the blood in a BOTTLE they have so much

Bunostomum trigonocephalum

Question Answer
Affects?Sheeps & goats
Adults looks like?Cutting plates
Transmitted?Ingestion of larvae
REMEMBERSheep & goats TRI to hurt ppl, but dont (not zoonotic) because they are too dumb. I mean, cmon, they eat larvae