Multiple choice (Laventhal) Flashcards
Infection with Enterobious vermicularis is the best diagnosed by which one of the following?
Examination of a cellophane tape preparation for eggs and adult
Human infection with Loa loa is the best diagnosed by which of following ?
Examination of blood smears
A child who plays in the dirt contaminated with human and pet feces is susceptible to which of the following set of parasites?
S. stercoralis, T. canis, A. lumbricoides, N. americanus
All of the following adult parasites live in the intestinal tract, except:
Ascaris lumbricoides
Dracunculus medinensis
Onchocerca vovulus
Trichella spiralis
Onchocerca volvulus
The largest nematodes that is found in the subcutaneously in infected host?
Dracunculus medinensis
Each of the following microfilaria has a sheath , except
Mansonella ozzardi
Diagnostic method for Ascaris lumbricoides
Fecal concentration method
Diagnostic method for S. stercoralis
Fecal concentration method
Diagnostic method for Trichinella spiralis
Tissue biopsy
Diagnostic method for W. bancrofti
Blood film examination
The vector of Brugia malayi
Anopheles and mansonia
The vector of Loa loa
Chrysops fly
The vector for Onchocerca volvulus
Simulium fly
The vector for Wuchereria bancrofti
Anopheles and culex
Visceral larva migrants is caused by
Toxocara canis
The zoonotic disease known as creeping eruption is caused by :
Ancylostoma braziliense
Can cause microcytic anemia , Vitamin b12 deficiency
Diphyllobothrium latum
Plerocercoid subcutaneously
Sparganosis
Neurological symptoms in the brain
Cysticercosis
Autoreinfection is common
Hymenolepis nana
Proglottid has 7 to 10 lateral urine branches
Taenia solium
Human accidentally ingested infected flea
Dipylidium caninum
Cysts found in liver, lungs or other organs
Echinococcus granulosus
A patient from the Great Lakes ares presents with vague abdominal symptoms and a macrocytic anemia. Which cestoda would be the probable cause?
Diphyllobothrium latum
A scolex is recovered in the human feces after patient is treated with medication. The scolex bears four cup shaped suckers. This parasite is:
Taenia saginata
The eggs of which two species are infective to humans if ingested, resulting in the larval stages and pathology in the host tissue?
Echinococcus granulosos and Taenia solium
Amor’s note: Hymenolepis nana and Taenia saginata
The larval stage of which two species are infective to humans if the parasitized insect intermediate host is ingested?
Hymenolepis nana and Dipylidium caninum
Packets of tapeworm eggs encapsulated in a single membrane were recovered feces. This parasites is:
Dipylidium caninum
The causative agent of cysticercosis is :
Taenia solium
The examination of human feces is no help of the detection of ?
Echinococcus granulosus
Mature eggs of an adult tapeworm accumulate in the :
Gravid proglottid
A type of tapeworm larva with a large bladder, producing daughter cysts, brood capsules, and numerous scolices is
Hydatid cyst
Eggs from which tapeworm, when passed, are immediately infective to humans?
Hymenolepis nana
In which o nematodes can each organism cause a pneumonia-like syndrome in a person exposed to heavy infection with any of the three parasites?
Necator americanus, Ascaris lumbricoides, Strongyloider stercoralis
A patient presents with vague abdominal pains and a microcytic hypochromic anemia. A possible causative parasite is:
Ancylostoma duodenale
An immunosuppressed patient is susceptible to autoreinfection with which of the ff nematodes?
Strongyloides stercoralis
In the Diphyllobothrium latum life cycle, the infective stage for humans is:
Plerocercoid
The number of uterine branches in the mature proglottid of Taenia saginata is:
More than 14
The tapeworm scolex without cup-shaped suckers is:
Diphyllobotrium latum
Define and cite an example of each of the following:
a. Hexacanth embryo
b. Hermaphroditic
c. Armed scolex
d. Proglottid
e. Hydatid cysts
a. embryo with 6 hooklets
b. two sexes in one organism
c. presence of hooklets
d. chain of segments
e. E. granulosus
What is the intermediate hosts for each parasite:
Taenia solium
Pig and Human
What is the intermediate hosts for this parasite:
Hymenolepis nana
None
What is the intermediate hosts for this parasite:
Hymenolepis diminuta
Flea or beetle
What is the intermediate hosts for this parasite:
Diphyllobothrium latum
Fish and Copepod
What is the intermediate hosts for this parasite:
Echinococcus granulosus
Human and none
Chronologic sequence of the life cycle of an intestinal nematode
Egg –> Miracidium –> Sporocyst –> Redia –> Cercaria –> Metacercaria –> Adult
Humans can be infected with the larval stage of all except one of the following parasites. Which of these Digenea cannot develop as a viable larva in the tissues of humans?
a. Hydatid tapeworm
b. Bird schistosomes
c. Manson’s blood fluke
d. Sheep liver fluke
b. Bird schistosomes
Which Platyhelminthes infects humans by skin penetration and has an association with bladder cancer?
Schistosoma haematobium
Eggs of all of the ff flukes are undeveloped when passed in feces except:
a. Fasciola hepatica
b. Paragonimus westermani
c. Schistosoma japonicum
d. Clonorchis sinensis
A. Fasciola hepatica
Fish carrying metacercariae may transmit:
Clonorchis sinensis
Paragonimus westermani infection is acquired by:
Eating infected crustacea
Schistosoma cercariae enter the human body:
By skin penetration or in contaminated drinking water
The Digenea infection for which bloody urine is often a symptom is:
Schistosoma haematobium
The fluke most commonly found in the United States is:
Fasciola hepatica
The preffered specimen for the diagnosis of paragonimiasis is:
Sputum
The three species of human blood flukes have as intermediate host:
An aquatic snail
The fluke acquired by eating contaminated vegetation is:
Fasciolopsis buski
