Abstract
Toxocara canis is one of the most prevalent and pathogenic gastrointestinal nematodes infecting dogs. The present study aimed for the description of this nematode isolated from the dog, Canis familiaris (Canidae) based on light and scanning electron microscopy. The recovered worms were long and yellow by naked eyes. Light and SEM observations showed that the anterior ends of both sexes constitute mouth and buccal capsule, which were surrounded by three well-defined interlocked lips, distinctly offset from the anterior end, one dorsal, and two laterals, the dorsal lip swollen with narrowed dentigerous ridges bordered the outer margin of the internal surface. Two fine cuticular pits were seen on the apex of the external surface of the apical part of the lips with narrow cervical alae that tapered gradually, merged into the cuticle, giving the anterior end a lancet-like appearance. The cuticle is transversely annulated.Male worms 19-31 (24.2± 1) mm long x 0.48-0.62 (0.51± 0.3) mm wide. The posterior end equipped by 32 pairs of papillae. Females long measured 33-42 (35.1± 1) mm long x 0.55-1.33 (0.9±0.02) mm wide. Semicircular anal opening at conical posterior end with no anal lips nor papillae were observed.
Highlights
Ascaridid nematodes of the genus Toxocara including Toxocara canis, Toxocara cati, Toxocara malaysiensis, and Toxocara isleonina are the most common gastrointestinal helminths infecting predatory Canidae and Felidae mammalian families (Fischer, 2003 and Bojar and Kłapeć, 2018) causing Toxocarosis which is a zoonotic disease among animalborne diseases transmitted through their larvae
Nematode worms were freshly of the apical part of the lips with narrow isolated from the gastrointestinal tracts of the cervical alae that tapered gradually, merged dogs Canis familiaris (Canidae) dissected by into the cuticle, giving the anterior end a members of the Faculty of Veterinary lancet-like appearance
Cloacal opening surrounded by 32 buffered in 0.1 Sodium cacodylate buffer for pairs of papillae arranged as 26 pairs scanning electron microscopy (SEM), Five to, 4 pairs ventral, and 10 mm from cephalic and caudal ends of 2 dorsal
Summary
The posterior end equipped by 32 pairs of papillae. Females long measured 33-42 (35.1± 1) mm long x 0.55-1.33 (0.9±0.02) mm wide. Semicircular anal opening at conical posterior end with no anal lips nor papillae were observed
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