How do sandflies cause Leishmaniasis?

  • Leishmaniasis is a disease caused by Leishmania donovani.
  • It has two hosts. Man is the primary host and sandfly is the secondary or intermediate host.
  • When a sandfly bites an infected man, it takes amastigote form of Leishmania from the blood of the man.
  • Then the parasites enter the midgut of the sandfly.
  • In the midgut, the parasites change into promastigote form.
  • Then they reproduce by means of longitudinal binary fission.
  • When the number of parasites is enormous, they come to the buccal cavity and pharynx of the sandfly.
  • When an infected sandfly bites a man, the parasites transferred into the man’s body from the buccal cavity of the sandfly.
  • This is the way how sandflies cause Leishmaniasis.

Read life cycle of Leishmania donovani to know in details. 

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Read More:

  1. Morphology of Leishmania donovani | Diagram
  2. General Characters of All Phylum of The Invertebrates.

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