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Abstract
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Trichuris is one of the most common gastrointestinal nematodes found in the cecum and colon of small ruminants around the world. The most prevalent species in Iran are Trichuris skrjabini and Trichuris ovis. The objective of present study is morphological analysis of ovine Trichuris species in different geographical provinces of Iran. From July 2022- Feb 2023, 1100 cecum and colon of sheep/goat slaughtered at slaughterhouses in various regions of Iran including: Hamedan, Tehran, East and West Azerbaijan, Kerman, Sistan and Balouchestan, Mazandaran, Hormozgan, Fars and Zanjan provinces were inspected. The collected male and female Trichuris nematodes were examined based on morphology and morphometry. The general appearance of specimens was scanned by the PathScan enable IV instrument. The dimensions of the worms were measured using a calibration slide and Image J software (V.1.52). The SPSS software (V.27) and One-way ANOVA method was used to compare the results. The results of present study showed two significant differences in A: anterior/whole body length ratio in females of T. skrjabini (0.702 ±0.058) vs T.ovis (0.624±0.191) and B: The average posterior width length in the males of T. skrjabini (1076.63 ±218.52 μm) vs T.ovis (1330.19±344.44 μm). However, there are some morphological parameters based on reproduction system in Trichuris species identification, the present results illustrate new morphological approach to rapid identification of T. skrjabini and T. ovis in Iranian small ruminants which can be helpful in early and quick identification of these two species.
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