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1 February 2019 Sinistral, Dextral, and Mixed Coiling Patterns Observed in Heligmonellid Nematodes (Trichostrongyloidea)
Hideo Hasegawa, Kartika Dewi
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Abstract

Coiling patterns of heligmonellid nematodes were examined for 520, 208, and 33 individuals of Nippostrongylus brasiliensis, Orientostrongylus tenorai, and Sabanema sp., respectively, collected from murine rodents of Indonesia. Besides typical sinistral coiling, complete dextral coiling was found in 3.3% of N. brasiliensis and 12.1% of Sabanema sp. Mixed coiling with partial sinistral and dextral patterns was also observed in 38.8% of N. brasiliensis, 60.7% of Sabanema sp., and 3.4% of O. tenorai. In dextral coils, the left ventral area with large ridges was located inside as in sinistral coils, keeping the ability to cling to intestinal villi. The cuticular dilatation at left to left dorsal area was located caudally in sinistral coils but rostrally in dextral coils. Presence of mixed coiling indicates that the coiling patterns can change. As the transition of coiling pattern accompanies a change in direction of coil axis, it is surmised that the dextral coiling may be chosen when a worm leaves a villus to move to another villus.

© American Society of Parasitologists 2019
Hideo Hasegawa and Kartika Dewi "Sinistral, Dextral, and Mixed Coiling Patterns Observed in Heligmonellid Nematodes (Trichostrongyloidea)," Journal of Parasitology 105(1), 41-44, (1 February 2019). https://doi.org/10.1645/18-82
Published: 1 February 2019
JOURNAL ARTICLE
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KEYWORDS
behavior
Coiling Patterns
functional morphology
Heligmonellidae
Indonesia
Murinae
Nippostrongylus
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