ASCP Parasitology Exam (Answered) With
Complete Verified Solution 2023/2024
What is the diagnostic procedure for Echinococcus granulosus?
The microscopic examination of hydatid fluid aspirated from a cyst.
What is the diagnostic procedure for Onchocerca volvulus?
Examination of skin snips.
What is the diagnostic procedure for Schistosoma haematobium?
Examination of urine sediment.
Charcot-Leyden crystals in stool may be associated with an immune response
and are thought to be formed from the breakdown products of what cell?
Eosinophils.
How is Trypanosoma brucei rhodesiense transmitted?
By the bite of the tsetse fly.
Infection with Giardia lamblia is often associated with:
Ingestion of water contaminated with cysts.
Upon examination of stool material for Cystoisospora belli, one would expect to
see:
Oocysts that are modified acid fast variable.
What is the best technique to identify Dientamoeba fragilis in stool?
Trichromatic stained smear.
Because there is no known cyst form for Dientamoeba fragilis.
Entamoeba gingivalis
Known to be an inhabitant of the mouth and is characterized by morphology that
resembles Entamoeba histolytica/E.dispar. However, Entamoeba gingivalis tends to
ingest P.M.N's whereas Entamoeba histolytica/E.dispar does not.
What organism causes primary amoebic meningoencephalitis?
Naegleria fowleri.
What are the characteristics of the rhabditiform-noninfective-larvae of
Strongyloides stercoralis?
Short buccal capsule and large genital primordium.
Visceral larva migrants is associated with what parasitic organism?
Toxocara.
Toxocara species are the cause of visceral larva migrants and occur when humans
accidentally ingest the infective eggs of the dog or cat ascarid. The larvae migrate
through the deep tissues, including the eye.
What are visceral larva migrans?
A condition in humans caused by the migratory larvae of certain nematodes, humans
being a dead end host.
These nematodes can infect but not mature in humans and after migrating through the
intestinal wall, travel with the blood stream to various organs where they cause
inflammation and damage.
Balantidium coli.
, Not common in the United States.
It can cause watery diarrhea in humans and is associated with pigs.
It is the largest of the intestinal Protozoa.
What method is used to diagnosis Toxoplasmosis?
Serology.
Examination of 24 hour unpreserved urine specimen is sometimes helpful in the
recovery of what parasitic organism?
Schistosoma haematobium eggs.
S.haematobium blood flukes reside in the veins over the bladder. When eggs are
passed from the body they are found in the urine.
Eating poorly cooked pork can lead to an infection with what parasitic organism?
Taenia solium and Trichinella spiralis.
What is the common name for Strongyloides stercoralis?
Threadworm.
The examination of sputum man be necessary to diagnosis an infection with what
parasitic organism?
Paragonimus westermani.
The adult worms are found in the Lung and and the eggs may be coughed up in
sputum.
Stool can also be used if the sputum is coughed up and then swallowed.
What is Taenia saginata associated with?
Beef
Where do the adult tapeworms of Echinococcus granulococcus usually live?
In the intestines of dogs.
Generally, how is Diphyllobothrium latum acquired?
By ingestion of freshwater fish.
In infections with Taenia solium, humans can serve as:
Either the definitive or intermediate host.
If humans ingest Taenia sodium cysticerci in uncooked or rare pork, the adult tape
worm will mature within the intestines - this makes humans the definitive host.
If eggs from the adult tapeworm are ingested, then the cysticerci will develop in human
tissue - this makes humans the accidental intermediate host.
What is known as the liver fluke?
Clonorchis sinensis.
What is know as the flea tapeworm or the cucumber tapeworm?
Dipylidium caninum.
Babesia is an intracellar parasite that resembles what parasitic organism?
Plasmodium falciparum rings.
Can Ascaris lumbricoides be transmitted in the laboratory under normal
conditions?
No, Ascaris lumbricoides requires a period of development in the soil before infective to
humans.
What is Toxoplasma gondii characterized by?
Possible congenital infection and ingestion of oocysts.
Cosmopolitan distribution.
Difficulties in interpretation of serological results.
Complete Verified Solution 2023/2024
What is the diagnostic procedure for Echinococcus granulosus?
The microscopic examination of hydatid fluid aspirated from a cyst.
What is the diagnostic procedure for Onchocerca volvulus?
Examination of skin snips.
What is the diagnostic procedure for Schistosoma haematobium?
Examination of urine sediment.
Charcot-Leyden crystals in stool may be associated with an immune response
and are thought to be formed from the breakdown products of what cell?
Eosinophils.
How is Trypanosoma brucei rhodesiense transmitted?
By the bite of the tsetse fly.
Infection with Giardia lamblia is often associated with:
Ingestion of water contaminated with cysts.
Upon examination of stool material for Cystoisospora belli, one would expect to
see:
Oocysts that are modified acid fast variable.
What is the best technique to identify Dientamoeba fragilis in stool?
Trichromatic stained smear.
Because there is no known cyst form for Dientamoeba fragilis.
Entamoeba gingivalis
Known to be an inhabitant of the mouth and is characterized by morphology that
resembles Entamoeba histolytica/E.dispar. However, Entamoeba gingivalis tends to
ingest P.M.N's whereas Entamoeba histolytica/E.dispar does not.
What organism causes primary amoebic meningoencephalitis?
Naegleria fowleri.
What are the characteristics of the rhabditiform-noninfective-larvae of
Strongyloides stercoralis?
Short buccal capsule and large genital primordium.
Visceral larva migrants is associated with what parasitic organism?
Toxocara.
Toxocara species are the cause of visceral larva migrants and occur when humans
accidentally ingest the infective eggs of the dog or cat ascarid. The larvae migrate
through the deep tissues, including the eye.
What are visceral larva migrans?
A condition in humans caused by the migratory larvae of certain nematodes, humans
being a dead end host.
These nematodes can infect but not mature in humans and after migrating through the
intestinal wall, travel with the blood stream to various organs where they cause
inflammation and damage.
Balantidium coli.
, Not common in the United States.
It can cause watery diarrhea in humans and is associated with pigs.
It is the largest of the intestinal Protozoa.
What method is used to diagnosis Toxoplasmosis?
Serology.
Examination of 24 hour unpreserved urine specimen is sometimes helpful in the
recovery of what parasitic organism?
Schistosoma haematobium eggs.
S.haematobium blood flukes reside in the veins over the bladder. When eggs are
passed from the body they are found in the urine.
Eating poorly cooked pork can lead to an infection with what parasitic organism?
Taenia solium and Trichinella spiralis.
What is the common name for Strongyloides stercoralis?
Threadworm.
The examination of sputum man be necessary to diagnosis an infection with what
parasitic organism?
Paragonimus westermani.
The adult worms are found in the Lung and and the eggs may be coughed up in
sputum.
Stool can also be used if the sputum is coughed up and then swallowed.
What is Taenia saginata associated with?
Beef
Where do the adult tapeworms of Echinococcus granulococcus usually live?
In the intestines of dogs.
Generally, how is Diphyllobothrium latum acquired?
By ingestion of freshwater fish.
In infections with Taenia solium, humans can serve as:
Either the definitive or intermediate host.
If humans ingest Taenia sodium cysticerci in uncooked or rare pork, the adult tape
worm will mature within the intestines - this makes humans the definitive host.
If eggs from the adult tapeworm are ingested, then the cysticerci will develop in human
tissue - this makes humans the accidental intermediate host.
What is known as the liver fluke?
Clonorchis sinensis.
What is know as the flea tapeworm or the cucumber tapeworm?
Dipylidium caninum.
Babesia is an intracellar parasite that resembles what parasitic organism?
Plasmodium falciparum rings.
Can Ascaris lumbricoides be transmitted in the laboratory under normal
conditions?
No, Ascaris lumbricoides requires a period of development in the soil before infective to
humans.
What is Toxoplasma gondii characterized by?
Possible congenital infection and ingestion of oocysts.
Cosmopolitan distribution.
Difficulties in interpretation of serological results.
