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Fish trypanosomes from the Okavango Delta, Botswana.
Nico J Smit1, Jo G Van As, Angela J Davies
1School of Life Sciences, Faculty of Science, Kingston University, Penrhyn Road, Kingston upon Thames, Surrey, KT1 2EE, UK.
Folia Parasitologica
|February 26, 2005
Summary
Trypanosomes were discovered in 37 fish across 10 species in Botswana's Okavango Delta. Morphological variations suggest these are Trypanosoma mukasai, potentially expanding its known host range.
Area of Science:
- Ichthyology
- Parasitology
- Molecular Biology
Background:
- Trypanosomes are protozoan parasites that infect fish.
- The Okavango Delta is a unique ecosystem with diverse fish fauna.
Purpose of the Study:
- To identify and characterize trypanosomes in fish from the Okavango Delta.
- To assess the host range of Trypanosoma mukasai.
Main Methods:
- Blood smears from 120 fish of 10 species were examined.
- Morphometric analysis and staining properties of trypanosomes were evaluated.
Main Results:
- Trypanosomes were found in 37 fish (30.8%).
- Specimens showed morphological variability (29.5–80.8 microm).
- These are tentatively identified as Trypanosoma mukasai, possibly infecting 9 new hosts.
Conclusions:
- Trypanosoma mukasai is prevalent in the Okavango Delta fish.
- The parasite may have a broader host specificity than previously known.
- Trypanosoma clariense might be a synonym of Trypanosoma mukasai.