| |
Rhabditiform Larva (First Stage. Has
bulbed esophagus.)
|
Filariform Larva (Third Stage. Lacks
prominent bulb in esophagus.)
|
| Species
|
Size
|
Genital Primordium
|
Buccal Cavity
|
Size
|
Length of Esophagus
|
Tip of Tail
|
| Strongyloides stercoralis |
225 mm × 16 mm. Range, 200-300 mm × 16-20 mm. |
Prominent. Is an elongate, tapered, or pointed
structure located along ventral wall about the
body length. |
Short, about 1/3-1/2 as long as the
width of the anterior end of the body. |
550 mm × 20 mm. Range, 500-550 mm × 20-24 mm. |
Extends approximately 1/2 length of
body. |
Notched. |
| Hookworm |
250 mm × 17 mm. Range, 200-300 mm × 14-17 mm. |
Inconspicuous. Rarely distinct. When
seen, is small, located nearer the tail than that
of Strongyloides. |
Long. Approximately as long as the width
of the body. |
500 mm. Range, 500-700 mm × 20-24 mm. |
Extends about 1/4 length of body. |
Pointed. |
