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Paper I — 2023 January (Supplementary) (2019 Scheme) — Q15

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Paper I
2023 January (Supplementary) (2019 Scheme) · 100 marks · 180 min

Question

What is the stage in the life cycle of trypanosomes infective to Man.

Q151 marks

Answer

The stage in the trypanosome life cycle infective to man is the metacyclic trypomastigote — found in the saliva of the infected tsetse fly (Trypanosoma brucei species, African sleeping sickness) or in the faeces of the infected reduviid/triatomine bug, deposited near the bite wound (Trypanosoma cruzi, Chagas disease), from where it enters the human host.

  1. 1General Parasitology

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