Giardia lamblia: Characteristics and Taxonomy
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Questions and Answers

What is the synonym of Giardia lamblia?

  • Giardia protozoa
  • Giardia mammalia
  • Giardia intestinalia (correct)
  • Giardia duodenalis (correct)
  • What is the status of Giardia duodenalis and Giardia intestinalis in some sources?

  • They are considered as two different kingdoms
  • They are considered as two different species
  • They are considered as two different genera
  • They are considered as distinct species or subspecies (correct)
  • What is the difference between Giardia duodenalis and Giardia intestinalis?

  • They infect different parts of the body
  • They have different numbers of flagella
  • There is no difference, they are interchangeable terms (correct)
  • They have different life cycles
  • Which of the following statements is true about Giardia duodenalis and Giardia intestinalis?

    <p>They are synonyms of Giardia lamblia</p> Signup and view all the answers

    What is the relationship between Giardia duodenalis and Giardia intestinalis?

    <p>They are interchangeable terms for the same species</p> Signup and view all the answers

    Why are Giardia duodenalis and Giardia intestinalis sometimes considered distinct species or subspecies?

    <p>Because some sources consider them to be distinct species or subspecies</p> Signup and view all the answers

    Study Notes

    Giardia lamblia

    Nomenclature

    • Giardia lamblia is a species of Giardia, a genus of flagellated protozoan parasites
    • Synonyms: Giardia duodenalis and Giardia intestinalis
    • Note: Giardia duodenalis and Giardia intestinalis are often used interchangeably, but some sources consider them to be distinct species or subspecies

    Taxonomy

    • Kingdom: Protista
    • Phylum: Metamonada
    • Class: Trepomonadea
    • Order: Diplomonadida
    • Family: Giardiidae
    • Genus: Giardia
    • Species: Giardia lamblia (including G. duodenalis and G. intestinalis)

    Characteristics

    • Giardia lamblia is a parasitic protozoan that infects the small intestine of mammals, including humans
    • It has a distinctive teardrop shape, with two nuclei and four pairs of flagella
    • The parasite has a simple life cycle, consisting of trophozoite and cyst stages
    • Trophozoites are the motile, feeding stage found in the small intestine
    • Cysts are the infectious stage, found in contaminated water and food

    Epidemiology

    • Giardia lamblia is a common intestinal parasite worldwide, affecting both developed and developing countries
    • It is a major cause of diarrheal disease, particularly in children, travelers, and individuals with compromised immune systems
    • Transmission occurs through the fecal-oral route, with contaminated water and food being the primary sources of infection

    Giardia lamblia

    Nomenclature

    • A species of Giardia, a genus of flagellated protozoan parasites
    • Also known as Giardia duodenalis and Giardia intestinalis, although some sources consider them distinct species or subspecies

    Classification

    • Kingdom: Protista
    • Phylum: Metamonada
    • Class: Trepomonadea
    • Order: Diplomonadida
    • Family: Giardiidae
    • Genus: Giardia
    • Species: Giardia lamblia

    Characteristics

    • A parasitic protozoan that infects the small intestine of mammals, including humans
    • Teardrop-shaped with two nuclei and four pairs of flagella
    • Has a simple life cycle consisting of trophozoite and cyst stages
    • Trophozoites are motile and feeding, found in the small intestine
    • Cysts are the infectious stage, found in contaminated water and food

    Epidemiology

    • A common intestinal parasite worldwide, affecting both developed and developing countries
    • A major cause of diarrheal disease, particularly in children, travelers, and individuals with compromised immune systems
    • Transmission occurs through the fecal-oral route, primarily through contaminated water and food

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    Description

    This quiz covers the characteristics, taxonomy, and nomenclature of Giardia lamblia, a species of flagellated protozoan parasites. Learn about its synonyms, kingdom, phylum, class, order, family, genus, and species.

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