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Trypanosoma danilewskyi: host specificity and host's effect on morphometrics.

P T Woo, G A Black

    The Journal of Parasitology
    |October 1, 1984
    PubMed
    Summary

    Trypanosoma danilewskyi infects several fish species, but its morphology varies significantly between hosts. Goldfish are particularly susceptible and show distinct trypanosome characteristics, aiding in host identification.

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    Area of Science:

    • Ichthyology
    • Parasitology
    • Molecular Biology

    Background:

    • Trypanosoma danilewskyi is a fish parasite with a wide host range.
    • Understanding host-parasite interactions is crucial for aquatic ecosystem health.
    • Morphological variations in parasites can indicate host specificity.

    Purpose of the Study:

    • To investigate the susceptibility of various fish species to Trypanosoma danilewskyi.
    • To determine if Trypanosoma danilewskyi exhibits host-specific morphological differences.
    • To assess the potential for using parasite morphology to identify fish hosts.

    Main Methods:

    • Intraperitoneal inoculation of fish with Trypanosoma danilewskyi.
    • Morphometric analysis of trypanosomes from different fish species (kinetoplast distance, flagellum length, nuclear dimensions).
    • Statistical analysis including discriminant analysis and jackknife classification.

    Main Results:

    • Several fish species, including goldfish (Carassius auratus), were susceptible to T. danilewskyi.
    • Trypanosomes from goldfish formed a distinct morphological cluster compared to those from other species.
    • Morphological features like kinetoplast position and nuclear size varied significantly between host species, allowing for partial host classification.

    Conclusions:

    • Trypanosoma danilewskyi displays host-associated morphological variations in fish.
    • Goldfish are a distinct host for T. danilewskyi, showing unique parasite characteristics.
    • Parasite morphometrics can aid in identifying the host species of Trypanosoma danilewskyi.

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