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New to Parasitology

  1. Oct 16, 2011 #1
    Hello guys,

    What does moulting mean. I think it is shedding off the cuticle. But what is the cuticle. Is the outer protecting covering of the larvae, or does the adult have it too. Do you have like multiple cuticle layers to begin with, and then shed them off or you grow a new cuticle and then shed the old one. Do adult parasites also moult. When you see a histological appearance of an egg (example ascaris lumbricoides pic below, can you see the cuticle as well, or does the larvae only have this)

    http://dpd.cdc.gov/dpdx/images/ParasiteImages/A-F/Ascariasis/Ascaris_egg_fert_decort_200x.jpg

    Also can the female egg just lay eggs without mating with a male partner, are these called unfertilized eggs. Also what are decorticated. Thanks :smile:
     
  2. jcsd
  3. Oct 16, 2011 #2
    Right the cuticle is simply the hard outer covering of the arthropod that forms its exoskeleton. It is present in both the larval and adult stages although there are structural differences between the two.
    Check en.wikipedia.org/wiki/Ecdysis and
    en.wikipedia.org/wiki/Arthropod_cuticle


    Technically there is just a single cuticle layer although new layers are formed while moulting.

    They definitely do.

    This is an interesting phenomenon called parthenogenesis.
    en.wikipedia.org/wiki/Parthenogenesis

    I couldn't understand your question about decortication:
     
  4. Oct 16, 2011 #3
    Thanks I understand now :smile: A new question for you : In the parasite entamoeba histolytics there are 4 nuclei in a cyst. But the cyst is formed from a single trophozoite with one nucleus. So does it divide later to form 4 nuclei cyst?
     
  5. Oct 16, 2011 #4
    Right, two nuclear divisions within the cyst result in four nuclei.
     
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