Intraspecific Morphological Variation in Free-Living Stages of Strongyloides Papillosus (Nematoda, Strongyloididae) Parasitizing Various Mammal Species

Strongyloides papillosus Wedl, 1856 is one of the most widespread nematodes parasitic in domestic animals. This species has been recorded on almost all continents of the planet. It parasitizes the small intestine of rabbits, sheep and cattle. At laboratory conditions, this species can also infect gu...

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Bibliographic Details
Published in:Vestnik zoologii 2019-08, Vol.53 (4), p.313-324
Main Authors: Boyko, O. O., Gugosyan, Y. A., Shendryk, L. I., Brygadyrenko, V. V.
Format: Article
Language:English
Subjects:
Animal morphology
Dimensions
Domestic animals
Esophagus
Genetic variability
Goats
Guinea pigs
Intestines
Larvae
Length
Morphology
Nematodes
Oesophagus
Parameters
Rabbits
Sheep
Small intestine
Species
Strongyloides
Swine
Width
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Summary:Strongyloides papillosus Wedl, 1856 is one of the most widespread nematodes parasitic in domestic animals. This species has been recorded on almost all continents of the planet. It parasitizes the small intestine of rabbits, sheep and cattle. At laboratory conditions, this species can also infect guinea pigs. Morphological variability of S. papillosus in relation to host species has not yet been studied. Our research showed that L 1 and L 2 of S. papillosus reached their maximum size in all parameters in guinea pigs: for L 1 — length and width of the body, length of esophagus and intestine; for L 2 — width of body and length of intestine. L 3 of S. papillosus had statistically reliable differences in almost all parameters (except the length of intestine) when parasitizing goats and rabbits. For L 3 the width of the body and the length of the tail end, we determined differences between S. papillosus infecting rabbits and guinea pigs, and also goats and guinea pigs. Male S. papillosus were observed to have statistically reliable differences in all morphological parameters for goats and rabbits, and also for rabbits and guinea pigs. Practically all measurements (except the length of the tail) were larger for S. papillosus in guinea pigs and goats than those in rabbits. Free-living females statistically differed by larger size in goats and rabbits. The smallest dimensions were determined for all free-living stages of S. papillosus in goats (except males). The largest size in most cases was determined for larval stages of S. papillosus in guinea pigs.
ISSN:2073-2333
2707-725X
2073-2333
2707-7268
DOI:10.2478/vzoo-2019-0030