Myiasis
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Questions and Answers

Which fly is known to complete its life cycle indoors?

  • Lucilia cuprina
  • Cochliomyia hominivorax
  • Chrysomya megacephala
  • Musca domestica (correct)

    • Which of the following flies is a facultative parasite?

  • Hermetia illucens
  • Cochliomyia hominivorax (correct)
  • Megaselia scalaris
  • Chrysomya megacephala

    • What is the primary source of energy for Hermetia illucens?

  • Flowers and pollen
  • Decaying plant material
  • Dead animal matter (correct)
  • Fungi and bacteria

    • Which of the following is an indicator species?

    <p>Lucilia cuprina</p> Signup and view all the answers

    What is the primary habitat of Chrysomya megacephala?

    <p>Outdoor environments</p> Signup and view all the answers

    Which of the following flies is a free-living species?

    <p>Megaselia scalaris</p> Signup and view all the answers

    What type of myiasis is caused by Cochliomyia hominivorax?

    <p>Cutaneous myiasis</p> Signup and view all the answers

    Which fly is known to cause anatomical myiasis?

    <p>Cochliomyia hominivorax</p> Signup and view all the answers

    Which type of myiasis is caused by Chrysomya bezziana?

    <p>Nasal myiasis</p> Signup and view all the answers

    What is the consequence of accidental ingestion of eggs?

    <p>Intestinal myiasis</p> Signup and view all the answers

    Which of the following is a characteristic symptom of nasal myiasis?

    <p>Intense irritation and headache</p> Signup and view all the answers

    Which species of fly is known to cause cavitary myiasis?

    <p>Cochliomyia hominivorax</p> Signup and view all the answers

    What is the habitat of the larvae of flies that cause myiasis?

    <p>Necrotic tissue</p> Signup and view all the answers

    What is a risk factor for intestinal myiasis?

    <p>Poor hygiene</p> Signup and view all the answers

    Which of the following is a consequence of myiasis?

    <p>All of the above</p> Signup and view all the answers

    What is the life cycle of flies that cause myiasis?

    <p>Eggs laid on nearby wound, hatched into larvae, and then pupate</p> Signup and view all the answers

    What is the interaction between flies and warm-blooded hosts?

    <p>Parasitic relationship</p> Signup and view all the answers

    Which stage of flies' life cycle is involved in myiasis?

    <p>Larval/pupal stage</p> Signup and view all the answers

    Which family of flies is NOT an agent of myiasis?

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

    What is the classification of myiasis based on the host's dependence?

    <p>Specific and obligatory</p> Signup and view all the answers

    What type of myiasis is caused by Dermatobia?

    <p>Obligatory myiasis</p> Signup and view all the answers

    Which of the following is an example of accidental myiasis?

    <p>Intestinal myiasis</p> Signup and view all the answers

    What is the term for myiasis that occurs when flies lay eggs in wounds or natural openings?

    <p>Facultative myiasis</p> Signup and view all the answers

    Which of the following is NOT a type of myiasis classification?

    <p>Chronic classification</p> Signup and view all the answers

    What is a common risk factor for Urogenital myiasis?

    <p>Poor hygiene</p> Signup and view all the answers

    Which symptom is associated with Ocular myiasis?

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

    What is a complication of Urogenital myiasis?

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

    Which species of fly is associated with Urogenital myiasis?

    <p>Lucilia sericata</p> Signup and view all the answers

    What is a symptom of Aural myiasis?

    <p>Foreign body sensation in the ear</p> Signup and view all the answers

    Which type of myiasis is associated with poor hygiene?

    <p>Urogenital myiasis</p> Signup and view all the answers

    What is a complication of Aural myiasis?

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

    Which species of fly is associated with Ocular myiasis?

    <p>Chrysomya beziana</p> Signup and view all the answers

    What is the primary goal of Maggot Debridement Therapy (MDT)?

    <p>To remove debris and non-viable tissue from the wound</p> Signup and view all the answers

    What is the result of Maggot Debridement Therapy (MDT) on the wound?

    <p>Enhanced healing and tissue repair</p> Signup and view all the answers

    What is the characteristic of the wound environment after Maggot Debridement Therapy (MDT)?

    <p>Clean and free of debris</p> Signup and view all the answers

    What is the mechanism by which maggots contribute to wound healing in MDT?

    <p>Proteolytic digestion of necrotic tissue</p> Signup and view all the answers

    What is the term for the artificial induction of myiasis in a controlled environment?

    <p>Artificially induced myiasis</p> Signup and view all the answers

    What is the outcome of successful Maggot Debridement Therapy (MDT)?

    <p>Enhanced healing and tissue repair</p> Signup and view all the answers

    Study Notes

    Myiasis

    • Interaction between flies and warm-blooded hosts
    • Involves infestation by larval or pupal stages of flies in tissue

    Agents of Myiasis

    • Calliphoridae, Sarcophagidae, and Stratiomyiidae
    • Piophilidae, Destridae, Phoridae, and Syrphidae
    • Drosophilidae

    Classification

    • Ecological (dependent on host)
    • Specific obligatory (required for life cycle)
    • Accidental/pseudomyiasis (facultative, not required for life cycle)
    • Dermatobia hominis, Cochliomyia hominivorax, and Musca domestica are examples of specific obligatory agents

    Types of Myiasis

    • Cutaneous myiasis (skin)
    • Cavitary myiasis (body cavities)
    • Nasal myiasis
    • Intestinal myiasis
    • Urogenital myiasis
    • Ocular myiasis
    • Aural myiasis

    Characteristics

    • Lay eggs on nearby wounds or in nasal passages
    • After hatching, larvae feed on necrotic tissue
    • Can cause intense irritation, headache, sneeze, and abdominal pain
    • Can lead to urogenital, ocular, and aural complications

    Prevention and Treatment

    • Poor hygiene is a major risk factor
    • Maggot debridement therapy (MDT) is an artificially induced myiasis performed in a controlled environment
    • MDT removes cellular debris and non-viable tissue, promotes debridement, and enhances healing

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    Description

    Learn about the interaction between flies and warm-blooded hosts, involving infestation by larval/pupal stages in tissue.

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