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Comparative studies on the karyotype of Ascaris suum and “Ascaris ovis”

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Summary

The karyotype of male specimens of the genus A. suum and of Ascaris recovered from lambs was studied as well as the specificity of the latter Ascaris with respect to the pig and the sheep.

It was found that the number of chromosomes in the primary spermatocyte cells is the same in A. suum and in Ascaris harvested from lambs. Normally they are n=24. Of these 19 are bivalent and 5-univalent. In anaphase 1 19 chromosomes migrate to the one pole and another 19 plus a pentad group of chromosomes proceed to the other pole. It is conjecture that these 5 chromsomes are the sex chromosomes of the studied Ascaris.

The results of comparative studies on the karyotype of Ascaris found in pigs and lambs are evidence against the species independence of A. ovis.

The latter designation should be considered as a synonym of A. suum.

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Authors and Affiliations

  1. Zentrales Helminthologisches Laboratorium Bulgarische Akademie der Wissenschaften, Sofia

    I. Vassilev & T. Mutafova

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  1. I. Vassilev
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  2. T. Mutafova
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Vassilev, I., Mutafova, T. Comparative studies on the karyotype of Ascaris suum and “Ascaris ovis”. Z. Parasitenk. 43, 115–121 (1974). https://doi.org/10.1007/BF00329169

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  • DOI: https://doi.org/10.1007/BF00329169

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