Differential species traits of Trichostrongylus tenuis (Nematoda, Trichostrongylidae)

  • V. O. Yevstafieva Poltava State Agrarian Academy
  • Y. S. Starodub Poltava State Agrarian Academy
  • V. M. Pisarenko Poltava State Agrarian Academy
  • O. V. Barabolia Poltava State Agrarian Academy
  • O. V. Nikiforova Kharkiv State Zooveterinary Academy
Keywords: trichostrongylosis; goose; nematodes; helminth eggs; differential diagnostics.

Abstract

Trichostrongylus tenuis Mehlin, 1846 is a helminth species that parasitizes in the gastrointestinal tract of birds and causes trichostrongylosis. Research on the differential features of the pathogen at various stages of development facilitates timely finding of the foci of infection and providing recommendations for prevention and control. In the present study, the differential species traits of male and female Trichostrongylus nematodes parasitizing in the domestic goose were examined. The nematodes were obtained in helminthological dissection of the intestine of birds kept at farms and private households in Poltava region, Ukraine. It was revealed that the morphological features of T. tenuis females that should be considered in species identification include the structural specifics of the reproductive system and the tail end. 22 metric parameters were suggested for species identification, including the female body measurements for different parts, specifics of vulva and anus location, sizes of the ovijector, sphincter, ejector and vulval area. Differences were found in the metric parameters of the lateral crests of the cuticle in female nematodes in relation to the position of crests on the parasite’s bodies. The cuticular crests were absent at 0.1 mm from the head and tail ends, and the length of crests was 9.3 mm in total. The longest and widest crests were observed in the middle of the body, the shortest were found in the anus area, and the narrowest crests were from the anterior part of esophagus to its middle. The distance between crests varied 0.2–3.0 μm, the longest at the transition of esophagus into the intestine and the shortest in area between the vulva and the anus. The metric parameters of T. tenuis eggs obtained from bird feces and in the nematode uterus differed significantly by 5 characters. The collected data on the morphological and metric parameters of females and eggs of T. tenuis can be used in species identification and understanding of the taxonomic position of that species.

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Published
2020-08-24
How to Cite
Yevstafieva, V. O., Starodub, Y. S., Pisarenko, V. M., Barabolia, O. V., & Nikiforova, O. V. (2020). Differential species traits of Trichostrongylus tenuis (Nematoda, Trichostrongylidae) . Regulatory Mechanisms in Biosystems, 11(3), 449–454. https://doi.org/10.15421/022069