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Questions and Answers
Which category of parasites includes both single-celled and multicellular forms?
Which category of parasites includes both single-celled and multicellular forms?
- Platyhelminthes
- Metazoa (correct)
- Mastigophora
- Sarcodina
Which phylum contains tapeworms and flukes?
Which phylum contains tapeworms and flukes?
- Nemahelminthes
- Sporozoa
- Mastigophora
- Platyhelminthes (correct)
What is the mode of transmission for Entamoeba histolytica?
What is the mode of transmission for Entamoeba histolytica?
- Fecal-oral route (correct)
- Insect bite
- Airborne transmission
- Sexual contact
In which category would you find flagellates?
In which category would you find flagellates?
What is the disease caused by Entamoeba histolytica?
What is the disease caused by Entamoeba histolytica?
In which type of country does E. histolytica infection occur most frequently?
In which type of country does E. histolytica infection occur most frequently?
What is the most frequent site of systemic disease for the organism causing intestinal and extraintestinal amebiasis?
What is the most frequent site of systemic disease for the organism causing intestinal and extraintestinal amebiasis?
What is the primary mode of transmission of Trichomonas vaginalis?
What is the primary mode of transmission of Trichomonas vaginalis?
What is the minimum infective dose for humans of Giardia lamblia (duodenalis)?
What is the minimum infective dose for humans of Giardia lamblia (duodenalis)?
Where do trophozoites attach in the intestines in Giardia lamblia (duodenalis) infection?
Where do trophozoites attach in the intestines in Giardia lamblia (duodenalis) infection?
What is the drug of choice for treating Trichomonas vaginalis?
What is the drug of choice for treating Trichomonas vaginalis?
What stage of the life cycle of Entamoeba histolytica predominates in nondiarrheal stools?
What stage of the life cycle of Entamoeba histolytica predominates in nondiarrheal stools?
What causes extensive local necrosis in the large intestine in intestinal amebiasis?
What causes extensive local necrosis in the large intestine in intestinal amebiasis?
What is the worldwide distribution of giardiasis?
What is the worldwide distribution of giardiasis?
What is the shape of Trichomonas vaginalis trophozoite?
What is the shape of Trichomonas vaginalis trophozoite?
What are the clinical findings associated with giardiasis?
What are the clinical findings associated with giardiasis?
What is the specific laboratory diagnostic method for Trichomonas vaginalis?
What is the specific laboratory diagnostic method for Trichomonas vaginalis?
Which type of parasites occur in two distinct forms of single-celled Protozoa and multicellular Metazoa?
Which type of parasites occur in two distinct forms of single-celled Protozoa and multicellular Metazoa?
In which phylum would you find flatworms like tapeworms and flukes?
In which phylum would you find flatworms like tapeworms and flukes?
Which of the following is a disease caused by Entamoeba histolytica?
Which of the following is a disease caused by Entamoeba histolytica?
What is the primary mode of transmission of E. histolytica?
What is the primary mode of transmission of E. histolytica?
What is the shape of Trichomonas vaginalis trophozoite?
What is the shape of Trichomonas vaginalis trophozoite?
What is the specific laboratory diagnostic method for Giardia lamblia (duodenalis)?
What is the specific laboratory diagnostic method for Giardia lamblia (duodenalis)?
What is the most common site of systemic disease in intestinal amebiasis?
What is the most common site of systemic disease in intestinal amebiasis?
What is the predominant stage in nondiarrheal stools for Entamoeba histolytica?
What is the predominant stage in nondiarrheal stools for Entamoeba histolytica?
What is the minimum infective dose for humans of Giardia lamblia (duodenalis)?
What is the minimum infective dose for humans of Giardia lamblia (duodenalis)?
Where in the body does Trichomonas vaginalis primarily exist?
Where in the body does Trichomonas vaginalis primarily exist?
What is the mode of transmission for Trichomonas vaginalis?
What is the mode of transmission for Trichomonas vaginalis?
Which organ is most commonly involved in extraintestinal amebiasis?
Which organ is most commonly involved in extraintestinal amebiasis?
What is the specific laboratory diagnostic method for Giardia lamblia (duodenalis)?
What is the specific laboratory diagnostic method for Giardia lamblia (duodenalis)?
What is the shape of Trichomonas vaginalis trophozoite?
What is the shape of Trichomonas vaginalis trophozoite?
Where do trophozoites attach in the intestines in Entamoeba histolytica infection?
Where do trophozoites attach in the intestines in Entamoeba histolytica infection?
What are the clinical findings associated with giardiasis?
What are the clinical findings associated with giardiasis?
Which category would you find flagellates in?
Which category would you find flagellates in?
In which type of country does E. histolytica infection occur most frequently?
In which type of country does E. histolytica infection occur most frequently?
Which category of parasites includes both single-celled and multicellular forms?
Which category of parasites includes both single-celled and multicellular forms?
What is the primary mode of transmission for Cryptosporidium?
What is the primary mode of transmission for Cryptosporidium?
In which phylum would you find both tapeworms and flukes?
In which phylum would you find both tapeworms and flukes?
What is the disease caused by Giardia lamblia?
What is the disease caused by Giardia lamblia?
Where does Trichomonas vaginalis primarily exist in the body?
Where does Trichomonas vaginalis primarily exist in the body?
What is the specific laboratory diagnostic method for Cryptosporidium?
What is the specific laboratory diagnostic method for Cryptosporidium?
What is the minimum infective dose for humans of Trichomonas vaginalis?
What is the minimum infective dose for humans of Trichomonas vaginalis?
Which organ is most commonly involved in extraintestinal amebiasis?
Which organ is most commonly involved in extraintestinal amebiasis?
In which category would you find flagellates?
In which category would you find flagellates?
What causes extensive local necrosis in the large intestine in giardiasis?
What causes extensive local necrosis in the large intestine in giardiasis?
What is the specific laboratory diagnostic method for Entamoeba histolytica?
What is the specific laboratory diagnostic method for Entamoeba histolytica?
What is the shape of Giardia lamblia (duodenalis) trophozoite?
What is the shape of Giardia lamblia (duodenalis) trophozoite?
Where do trophozoites attach in the intestines in Entamoeba histolytica infection?
Where do trophozoites attach in the intestines in Entamoeba histolytica infection?
What is the worldwide distribution of trichomoniasis?
What is the worldwide distribution of trichomoniasis?
What are the clinical findings associated with trichomoniasis?
What are the clinical findings associated with trichomoniasis?
Study Notes
Categories of Parasites
- Includes both single-celled (Protozoa) and multicellular (Metazoa) forms.
- Flagellates are found in Protozoa.
Phylum Containing Tapeworms and Flukes
- Flatworms, which belong to the phylum Platyhelminthes.
Entamoeba histolytica
- Mode of transmission: Fecal-oral route, primarily through contaminated water or food.
- Disease caused: Amebic dysentery or amoebiasis.
- Infections most common in developing countries with poor sanitation.
- Primary site of systemic disease: Liver, commonly leading to liver abscesses.
- Predominant stage in nondiarrheal stools: Cysts.
Giardia lamblia (duodenalis)
- Minimum infective dose for humans: Approximately 10-100 cysts.
- Trophozoites attach to the intestinal wall, particularly in the duodenum.
- Clinical findings associated with giardiasis: Diarrhea, abdominal cramps, bloating, fatigue.
- Specific laboratory diagnostic method: Stool examination for cysts or trophozoites.
Trichomonas vaginalis
- Primary mode of transmission: Sexual contact.
- Minimum infective dose: Not clearly defined, as only a few organisms can cause infection.
- Predominant location in body: Urogenital tract.
- Drug of choice for treatment: Metronidazole.
- Laboratory diagnostic method: Wet mount microscopy or nucleic acid amplification tests.
Cryptosporidium
- Primary mode of transmission: Fecal-oral route, primarily through contaminated water.
- Specific laboratory diagnostic method: Acid-fast staining or immunofluorescence assays.
Additional Clinical Information
- Organ commonly involved in extraintestinal amebiasis: Liver.
- Extensive local necrosis in intestinal amebiasis is caused by the invasive nature of Entamoeba histolytica.
- Worldwide distribution of giardiasis: Common in both developed and developing countries, particularly in areas with untreated water supplies.
- Shape of Trichomonas vaginalis trophozoite: Pear-shaped with flagella.
- Shape of Giardia lamblia (duodenalis) trophozoite: Tear or pear-shaped with two nuclei.
Summary of Infection Patterns
- E. histolytica and Giardia lamblia infections occur frequently in regions with inadequate sanitation.
- Both infections lead to gastrointestinal symptoms, with variations in the degree of severity.
- Trophozoites from both Entamoeba and Giardia attach differently, affecting the clinical manifestations of the diseases.
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Description
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.