Fig. 4

Morphology of 5 harvested L3 recovered from examined goats. a Bunostomum sp. Note the head was bullet. The esophagus has a prominent bulb caudally and it had 16 intestinal cells. Scale bar = 100 µm. b Chabertia ovina. Note a long larva. Scale bar = 100. Inset lower: Note a square-shaped head with 28–32 rectangular-shaped intestinal cells. Scale bar = 50. Inset higher: Note a long thin tail sheath. The filament was medium-sized measuring 33 μm long (approximately 30% of the tail sheath long). Scale bar = 50. c Haemonchus sp. Note a medium-sized larva, bullet-shaped head with 16 alternating zigzag-shaped intestinal cells. The tail of the sheath tapers to end in a whip-like, medium-sized filament and usually kinked. d Ostertagia ostertagi. Note a medium-sized larva. Scale bar = 100. Inset left: Note a slight shoulder close to the anterior end (squarish appearance) with 16 intestinal cells. Inset right: The tail is rounded at its end with a short tail sheath (57.14 μm) and blunt tail tip without a filament. Scale bar = 50. e Strongyloides sp. Note a small slender short larva, measured 507.93 μm in length with uniquely very long esophagus extending nearly for 40% of the body length. Scale bar = 100 μm. Inset right: Note the absence of tail sheath and high magnification shows that the tail is bifid. Scale bar = 50 μm