Exam 3 Point Solution questions

Neurocysticercosis is a significant zoonotic disease resulting from infection with the Pork Tapeworm (Taenia solium). How do humans acquire this disease?

Ingestion of pork tapeworm eggs by the fecal oral route

But Dr. Faulkner you said Quest Plus is good for treatment of Equine Tapeworms. Why is it effective?

It is a combo product formulated w/ a Macrocyclic lactone and Praziquantel

Why doesn’t Moxidectin work for treating Tapeworms?

Tapeworm parasites do not have glutamate - gated chloride channels or GABA receptors (Same w/ Ivermectin)

Will Dr. Faulkner become infected with the “hydatid tapeworm” if he ate this cyst dissected from a GSMNP Elk @ necropsy?

No, but it is really disgusting and he will likely get sick & nauseous.

No, he will be neither a DH or IH from eating the cysts/

Why doesn’t Ivermectin work for treating Tapeworms?

Tapeworm parasites do not have glutamate - gated chloride channels or GABA receptors (same w/ moxidectin)

Organisms that look like this were removed from a lesion on the withers of a horse in Cameron Co. Texas. What is the appropriate next step?

Discuss the findings with the owner and notify the local APHIS office

These organisms were observed emerging from a lesion on the withers of a horse imported from Argentina. What is their proper scientific name?

Cochliomyia hominivorax (Screwworm)

Why are the nymph stages of 3 host tick species more likely to be associated with transmission of an infectious disease?

They often remain attached and feed longer because of their small size

A 10-year-old F/S Scottish terrier presents w/ excessive flaking dermatitis. What are they?

Cheyletiella sp. (Walking Dandruff mite)

A dog presents w/ an erythematous “red” mange showing hair loss around the eyes & bony projections of the body. What parasitic mite should be high on your differential?

Demodex canis (demodectic mange from mites)

A backyard chicken is presented for laying less eggs than normal and listless behavior. Tiny blackish brown specks are seen moving around the hen’s vent. What is your best guess?

Ornithonyssus sylviarum (Northern Fowl Mite)

Which stage of a 3 host tick species is more likely to be associated with transmission of an infectious disease?

Nymph

What Trematode parasite is known as the “Salmon Poisoning Fluke”?

Nanophytes

Why are Liver fluke infections in cattle often associated w/ drought affected pastures during the summer months?

Shrinking ponds expose more vegetation with metacercaria

Eggs that look like this were found on a fecal flotation of a dog presenting with hemorrhagic enteritis & other signs similar to canine parvovirus. What etiologic agent is responsible for the clinical signs?

Neorickettsia helminthoeca

This worm was found in the small intestine of a pig raised on a pastured wood-lot in Bell County, KY. What is it?

Thorny-headed worm (Macroacanthorynchus hirudinaceus)