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Related Experiment Videos

Modelling the migration of Onchocerca volvulus in simuliids, using a simple compartmental process.

D Jerwood, T Lewis, F W Saporu

    Biometrics
    |June 1, 1984
    PubMed
    Summary

    A multinomial distribution model explains the migration of Onchocerca volvulus parasites within black flies. This compartmental process successfully describes early parasite movement from the stomach to the thorax.

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    Area of Science:

    • Parasitology
    • Mathematical Biology
    • Entomology

    Background:

    • Onchocerca volvulus is a filarial nematode.
    • Simuliids (black flies) are vectors for Onchocerca volvulus.
    • Understanding parasite migration in vectors is crucial for disease control.

    Purpose of the Study:

    • To model the early migration of Onchocerca volvulus in simuliids.
    • To apply a hierarchical compartmental process to parasite movement.
    • To assess the fit of a multinomial distribution to observed migration patterns.

    Main Methods:

    • Developed a time-homogeneous compartmental model with differing transition rates.
    • Utilized a hierarchical structure where individuals enter the first compartment.
    • Applied the model to Onchocerca volvulus migration data in simuliids.

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    Main Results:

    • The hierarchical compartmental process results in a multinomial distribution.
    • The model successfully represents early Onchocerca volvulus migration from the stomach to the thorax.
    • Allowances for engorgement period and peritrophic membrane encapsulation improve model fit.

    Conclusions:

    • A multinomial distribution derived from a hierarchical compartmental model effectively describes early Onchocerca volvulus migration in simuliids.
    • The model provides insights into parasite translocation within the vector.
    • This approach can inform strategies for controlling onchocerciasis transmission.