Entamoeba histolytica Quiz
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Questions and Answers

Which organelles perform a variety of functions in the cytoplasm of protozoa?

  • Nucleus and endoplasm
  • Ribosomes and Golgi apparatus
  • Pseudopods, flagella, cilia (correct)
  • Mitochondria and endoplasmic reticulum

    • What is the active feeding and growing stage of protozoa called?

  • Gametocyte
  • Cyst
  • Sporozoite
  • Trophozoite (correct)

    • What is the function of the pellicle in protozoa?

  • Energy production
  • Waste elimination
  • Supporting and protective function (correct)
  • Reproduction

    • What are the two forms of single-celled parasites, such as protozoa?

    <p>Vegetative (trophozoite) and cystic (cyst)</p> Signup and view all the answers

    Which form of reproduction is NOT mentioned for Entamoeba histolytica?

    <p>Conjugation</p> Signup and view all the answers

    How many species of amoebae are mentioned to inhabit the gastrointestinal tract of humans within the Phylum Sarcomastigophora?

    <p>7</p> Signup and view all the answers

    What is the estimated annual death toll due to invasive amebiasis primarily caused by Entamoeba histolytica?

    <p>50,000</p> Signup and view all the answers

    How many forms of morphology does E. histolytica have?

    <p>3</p> Signup and view all the answers

    What is the first step in the life cycle of E. histolytica after acquisition of infection?

    <p>Swallowing mature cysts</p> Signup and view all the answers

    What can the forma minuta of E. histolytica potentially transform into in individuals with reduced biological resistance?

    <p>Invasive forma magna</p> Signup and view all the answers

    What are the extraintestinal manifestations of E. histolytica infection mentioned in the text?

    <p>Abscesses in different organs</p> Signup and view all the answers

    Which method is NOT mentioned for the diagnosis of amebiasis?

    <p>PCR for DNA amplification</p> Signup and view all the answers

    What is NOT mentioned as a method for the prophylaxis of amebiasis?

    <p>Vaccination against E. histolytica</p> Signup and view all the answers

    What is the characteristic of Entamoeba coli mentioned in the text?

    <p>It is a commensal and does not cause disease</p> Signup and view all the answers

    What are the differences mentioned between Entamoeba coli and Entamoeba histolytica?

    <p>Size, mobility, presence of erythrocytes</p> Signup and view all the answers

    Which organelle in the cytoplasm of protozoa is responsible for motor function?

    <p>Pseudopods</p> Signup and view all the answers

    How many forms of morphology does Balantidium coli have?

    <p>Two</p> Signup and view all the answers

    What is the primary function of the pellicle in protozoa?

    <p>Supporting and protective function</p> Signup and view all the answers

    How is the active feeding and growing stage of protozoa referred to?

    <p>Trophozoite</p> Signup and view all the answers

    Which of the following is NOT mentioned as an extraintestinal manifestation of E. histolytica infection?

    <p>Brain abscesses</p> Signup and view all the answers

    What is the primary method mentioned for the diagnosis of amebiasis?

    <p>Microscopy for stool examination</p> Signup and view all the answers

    Which of the following is NOT mentioned as a method for the prophylaxis of amebiasis?

    <p>Use of antimalarial drugs</p> Signup and view all the answers

    What is the estimated annual death toll due to invasive amebiasis primarily caused by Entamoeba histolytica?

    <p>50,000</p> Signup and view all the answers

    Which subphylum within Phylum Sarcomastigophora includes 7 species of amoebae inhabiting the gastrointestinal tract of humans?

    <p>Sarcodina</p> Signup and view all the answers

    What are the forms of reproduction mentioned for Protozoa?

    <p>Endodyogeny and syngamy</p> Signup and view all the answers

    What are the three forms of morphology mentioned for E. histolytica?

    <p>Forma magna, forma minuta, forma infectiva</p> Signup and view all the answers

    What is the characteristic mentioned for Entamoeba coli in the text?

    <p>Exists as a vegetative form in the large intestine</p> Signup and view all the answers

    What is the invasive form that the forma minuta of E. histolytica can potentially transform into in individuals with reduced biological resistance?

    <p>Forma magna</p> Signup and view all the answers

    What is the life cycle stage of E. histolytica that involves the acquisition of infection by swallowing mature cysts?

    <p>Excystation in the small intestine</p> Signup and view all the answers

    What is the primary method for the diagnosis of amebiasis mentioned in the text?

    <p>Microscopy for stool examination</p> Signup and view all the answers

    Which subphylum within Phylum Sarcomastigophora includes 7 species of amoebae inhabiting the gastrointestinal tract of humans?

    <p>Sarcodina</p> Signup and view all the answers

    What is the primary function of the pellicle in protozoa?

    <p>Supporting and protective function</p> Signup and view all the answers

    How many forms of morphology does Balantidium coli have?

    <p>Two</p> Signup and view all the answers

    What are the differences mentioned between Entamoeba coli and Entamoeba histolytica?

    <p>Presence of cystic form</p> Signup and view all the answers

    What is the life cycle stage of E. histolytica that involves the acquisition of infection by swallowing mature cysts?

    <p>Excystation</p> Signup and view all the answers

    Which organelle in the cytoplasm of protozoa is responsible for motor function?

    <p>Pseudopods</p> Signup and view all the answers

    What is the estimated annual death toll due to invasive amebiasis primarily caused by Entamoeba histolytica?

    <p>More than 55,000</p> Signup and view all the answers

    What are the three forms of morphology mentioned for E. histolytica?

    <p>Trophozoite, cyst, and minuta</p> Signup and view all the answers

    What is the primary method mentioned for the diagnosis of amebiasis?

    <p>Microscopic identification of cysts or trophozoites in fresh feces</p> Signup and view all the answers

    What is the characteristic of Entamoeba coli mentioned in the text?

    <p>Two layers of cytoplasm</p> Signup and view all the answers

    What is the function of the pellicle in protozoa?

    <p>Supporting and protective function</p> Signup and view all the answers

    What is NOT mentioned as an extraintestinal manifestation of E. histolytica infection?

    <p>Cardiac involvement</p> Signup and view all the answers

    What is the primary function of the pellicle in protozoa?

    <p>To provide shape and support for the cell membrane</p> Signup and view all the answers

    How many species of amoebae are mentioned to inhabit the gastrointestinal tract of humans within the Phylum Sarcomastigophora?

    <p>7</p> Signup and view all the answers

    What is NOT mentioned as an extraintestinal manifestation of E. histolytica infection?

    <p>Lung inflammation</p> Signup and view all the answers

    What are the three forms of morphology mentioned for E. histolytica?

    <p>Forma magna, forma minuta, and forma cystica</p> Signup and view all the answers

    What is the primary method for the diagnosis of amebiasis mentioned in the text?

    <p>Microscopy for stool examination</p> Signup and view all the answers

    What is the characteristic of Entamoeba coli mentioned in the text?

    <p>It is a commensal and does not cause disease</p> Signup and view all the answers

    What are the differences mentioned between Entamoeba coli and Entamoeba histolytica?

    <p>Size, mobility, presence of erythrocytes, and clinical impact on the host</p> Signup and view all the answers

    What is the life cycle stage of E. histolytica that involves the acquisition of infection by swallowing mature cysts?

    <p>Swallowing mature cysts</p> Signup and view all the answers

    What is the estimated annual death toll due to invasive amebiasis primarily caused by Entamoeba histolytica?

    <p>50,000</p> Signup and view all the answers

    Study Notes

    Entamoeba Histolytica: Parasitic Characteristics and Clinical Manifestations

    • The cystic form of Entamoeba histolytica serves for the parasite's survival in adverse living conditions, and it is the invasive form of some parasites.
    • The types of reproduction of Protozoa include asexual (binary fission, multiple fission, endodyogeny) and sexual (conjugation in Balantidium coli; gametogony in Sporozoa like genus Plasmodium).
    • Phylum Sarcomastigophora includes two subphyla: Mastigophora and Sarcodina, with 7 species of amoebae inhabiting the gastrointestinal tract of humans.
    • Entamoeba histolytica is a parasitic amoeba that primarily infects the large intestine of humans, causing invasive amebiasis which leads to disabling illness and an estimated 50,000 deaths annually, mostly in tropical regions.
    • The morphology of E. histolytica occurs in three forms: forma magna, forma minuta, and forma cystica.
    • The life cycle of E. histolytica involves the acquisition of infection by swallowing mature cysts, excystation in the small intestine, migration of adult trophozoites to the large intestine, and the formation and secretion of cysts in infected individuals.
    • In individuals with reduced biological resistance, the forma minuta can turn into the invasive forma magna, causing local damages and potentially reaching other organs.
    • Clinical features of E. histolytica infection include amebic dysentery, expansion of ulcers in the intestines, and extraintestinal manifestations such as abscesses in different organs.
    • Diagnosis of amebiasis involves microscopy for stool examination and serology for antibody and amebic antigen detection.
    • Prophylaxis of amebiasis includes purification and control of water reservoirs, preservation of food products from houseflies, and good personal hygiene.
    • Entamoeba coli, a related species, exists as a vegetative form in the large intestine and is discarded outside with feces like cysts, but it is a commensal and does not cause disease, unlike E. histolytica.
    • Differences between Entamoeba coli and Entamoeba histolytica include size, mobility, presence of erythrocytes, and the clinical impact on the host.

    Entamoeba Histolytica: Parasitic Characteristics and Clinical Manifestations

    • The cystic form of Entamoeba histolytica serves for the parasite's survival in adverse living conditions, and it is the invasive form of some parasites.
    • The types of reproduction of Protozoa include asexual (binary fission, multiple fission, endodyogeny) and sexual (conjugation in Balantidium coli; gametogony in Sporozoa like genus Plasmodium).
    • Phylum Sarcomastigophora includes two subphyla: Mastigophora and Sarcodina, with 7 species of amoebae inhabiting the gastrointestinal tract of humans.
    • Entamoeba histolytica is a parasitic amoeba that primarily infects the large intestine of humans, causing invasive amebiasis which leads to disabling illness and an estimated 50,000 deaths annually, mostly in tropical regions.
    • The morphology of E. histolytica occurs in three forms: forma magna, forma minuta, and forma cystica.
    • The life cycle of E. histolytica involves the acquisition of infection by swallowing mature cysts, excystation in the small intestine, migration of adult trophozoites to the large intestine, and the formation and secretion of cysts in infected individuals.
    • In individuals with reduced biological resistance, the forma minuta can turn into the invasive forma magna, causing local damages and potentially reaching other organs.
    • Clinical features of E. histolytica infection include amebic dysentery, expansion of ulcers in the intestines, and extraintestinal manifestations such as abscesses in different organs.
    • Diagnosis of amebiasis involves microscopy for stool examination and serology for antibody and amebic antigen detection.
    • Prophylaxis of amebiasis includes purification and control of water reservoirs, preservation of food products from houseflies, and good personal hygiene.
    • Entamoeba coli, a related species, exists as a vegetative form in the large intestine and is discarded outside with feces like cysts, but it is a commensal and does not cause disease, unlike E. histolytica.
    • Differences between Entamoeba coli and Entamoeba histolytica include size, mobility, presence of erythrocytes, and the clinical impact on the host.

    Entamoeba Histolytica: Parasitic Characteristics and Clinical Manifestations

    • The cystic form of Entamoeba histolytica serves for the parasite's survival in adverse living conditions, and it is the invasive form of some parasites.
    • The types of reproduction of Protozoa include asexual (binary fission, multiple fission, endodyogeny) and sexual (conjugation in Balantidium coli; gametogony in Sporozoa like genus Plasmodium).
    • Phylum Sarcomastigophora includes two subphyla: Mastigophora and Sarcodina, with 7 species of amoebae inhabiting the gastrointestinal tract of humans.
    • Entamoeba histolytica is a parasitic amoeba that primarily infects the large intestine of humans, causing invasive amebiasis which leads to disabling illness and an estimated 50,000 deaths annually, mostly in tropical regions.
    • The morphology of E. histolytica occurs in three forms: forma magna, forma minuta, and forma cystica.
    • The life cycle of E. histolytica involves the acquisition of infection by swallowing mature cysts, excystation in the small intestine, migration of adult trophozoites to the large intestine, and the formation and secretion of cysts in infected individuals.
    • In individuals with reduced biological resistance, the forma minuta can turn into the invasive forma magna, causing local damages and potentially reaching other organs.
    • Clinical features of E. histolytica infection include amebic dysentery, expansion of ulcers in the intestines, and extraintestinal manifestations such as abscesses in different organs.
    • Diagnosis of amebiasis involves microscopy for stool examination and serology for antibody and amebic antigen detection.
    • Prophylaxis of amebiasis includes purification and control of water reservoirs, preservation of food products from houseflies, and good personal hygiene.
    • Entamoeba coli, a related species, exists as a vegetative form in the large intestine and is discarded outside with feces like cysts, but it is a commensal and does not cause disease, unlike E. histolytica.
    • Differences between Entamoeba coli and Entamoeba histolytica include size, mobility, presence of erythrocytes, and the clinical impact on the host.

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    Description

    Test your knowledge of Entamoeba histolytica, a parasitic amoeba that causes invasive amebiasis in humans. Learn about its life cycle, clinical manifestations, diagnosis, and preventive measures through this informative quiz.

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