50 Questions
Which category of parasites includes both single-celled and multicellular forms?
Metazoa
Which phylum contains tapeworms and flukes?
Platyhelminthes
What is the mode of transmission for Entamoeba histolytica?
Fecal-oral route
In which category would you find flagellates?
Mastigophora
What is the disease caused by Entamoeba histolytica?
Amebic dysentery
In which type of country does E. histolytica infection occur most frequently?
Tropical countries
What is the most frequent site of systemic disease for the organism causing intestinal and extraintestinal amebiasis?
Liver
What is the primary mode of transmission of Trichomonas vaginalis?
Sexual intercourse
What is the minimum infective dose for humans of Giardia lamblia (duodenalis)?
10-25 cysts
Where do trophozoites attach in the intestines in Giardia lamblia (duodenalis) infection?
Ventral sucking disk
What is the drug of choice for treating Trichomonas vaginalis?
Metronidazole
What stage of the life cycle of Entamoeba histolytica predominates in nondiarrheal stools?
Cyst
What causes extensive local necrosis in the large intestine in intestinal amebiasis?
Enzymes secreted by trophozoites
What is the worldwide distribution of giardiasis?
Worldwide distribution
What is the shape of Trichomonas vaginalis trophozoite?
Pear-shaped with 2 nuclei
What are the clinical findings associated with giardiasis?
Foul-smelling diarrhea with nausea and anorexia
What is the specific laboratory diagnostic method for Trichomonas vaginalis?
Microscopic examination of vaginal or urethral discharge
Which type of parasites occur in two distinct forms of single-celled Protozoa and multicellular Metazoa?
Sporozoans and Amebas
In which phylum would you find flatworms like tapeworms and flukes?
Phylum Platyhelminthes
Which of the following is a disease caused by Entamoeba histolytica?
Amebic dysentery
What is the primary mode of transmission of E. histolytica?
Fecal-oral route through contaminated food and water
What is the shape of Trichomonas vaginalis trophozoite?
Pear-shaped
What is the specific laboratory diagnostic method for Giardia lamblia (duodenalis)?
Stool antigen test
What is the most common site of systemic disease in intestinal amebiasis?
Liver
What is the predominant stage in nondiarrheal stools for Entamoeba histolytica?
Cyst
What is the minimum infective dose for humans of Giardia lamblia (duodenalis)?
10-25 cysts
Where in the body does Trichomonas vaginalis primarily exist?
Urethra
What is the mode of transmission for Trichomonas vaginalis?
Sexual intercourse
Which organ is most commonly involved in extraintestinal amebiasis?
Liver
What is the specific laboratory diagnostic method for Giardia lamblia (duodenalis)?
Stained Giemsa or unstained smears examination
What is the shape of Trichomonas vaginalis trophozoite?
Pear-shaped with a central nucleus & 4 anterior flegella
Where do trophozoites attach in the intestines in Entamoeba histolytica infection?
To the intestinal villi by ventral sucking disk
What are the clinical findings associated with giardiasis?
Nonbloody, foul-smelling diarrhea with nausea and flatulence
Which category would you find flagellates in?
Protozoa
In which type of country does E. histolytica infection occur most frequently?
Developing countries with poor sanitation conditions
Which category of parasites includes both single-celled and multicellular forms?
Metazoa
What is the primary mode of transmission for Cryptosporidium?
Contaminated food and water
In which phylum would you find both tapeworms and flukes?
Platyhelminthes
What is the disease caused by Giardia lamblia?
Giardiasis
Where does Trichomonas vaginalis primarily exist in the body?
Genitourinary system
What is the specific laboratory diagnostic method for Cryptosporidium?
Stool microscopy for oocysts
What is the minimum infective dose for humans of Trichomonas vaginalis?
10-25 cysts
Which organ is most commonly involved in extraintestinal amebiasis?
Liver
In which category would you find flagellates?
Protozoa
What causes extensive local necrosis in the large intestine in giardiasis?
Secretion of enzymes by trophozoites
What is the specific laboratory diagnostic method for Entamoeba histolytica?
Microscopic examination of abcess material
What is the shape of Giardia lamblia (duodenalis) trophozoite?
-shaped with a central nucleus & 2 nuclei, 4 pairs of flagella and a suction disk.
Where do trophozoites attach in the intestines in Entamoeba histolytica infection?
- Intestinal villi by ventral sucking disk
What is the worldwide distribution of trichomoniasis?
- Worldwide distribution
What are the clinical findings associated with trichomoniasis?
Asymptomatic or scant, watery vaginal discharge accompanied by itching, burning and painful urination.
This quiz provides an introduction to medical parasitology, focusing on invertebrate animals that can cause disease in humans and other animals. The quiz covers the classification of parasites into protozoa and metazoa, as well as the subdivisions of protozoa and metazoa.
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