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Development ofLeishmania chagasi (Kinetoplastida: Trypanosomatidae) in the second blood-meal of its vectorLutzomyia longipalpis (Diptera: Psychodidae)

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Light and electron microscopy investigations were carried out to compare the development ofLeishmania chagasi inLutzomyia longipalpis females that took a second blood-meal and others that took a single blood-meal. The establishment of the parasite in the foregut and the thoracic midgut of the vector was not severely affected by the intake of the second blood-meal. At 3 days after the intake of the second blood-meal, a rapid increase in the proportion of metacyclic promastigotes detected in the midgut and proboscis of the vector was noticed. No similar increase in the proportion of metacyclic promastigotes observed in the females that took a single blood-meal was noticeable. The results indicate a higher probability of transmission of the parasite to the vertebrate host at the third bite of the vector than at the second bite.

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Correspondence to R. D. Ward.

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Elnaiem, D.A., Ward, R.D. & Young, P.E. Development ofLeishmania chagasi (Kinetoplastida: Trypanosomatidae) in the second blood-meal of its vectorLutzomyia longipalpis (Diptera: Psychodidae). Parasitol Res 80, 414–419 (1994). https://doi.org/10.1007/BF00932379

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  • Electron Microscopy
  • High Probability
  • Similar Increase
  • Microscopy Investigation
  • Vertebrate Host