Taenia solium (continued)
OVA
SIZE: 30 to 40 mcm (small to medium).
SHAPE: Ovoid to round.
COLOR: Brown.
OPERCULUM: Absent.
CONTENTS: Hexacanth oncosphere.
MISCELLANEOUS: Embryophore with double layer and a striated outer layer identical
to the egg of T. saqinatus (eggs should be reported as being taeinoid).
ADULT
SIZE: 2 to 7 meters.
COLOR: Ivory.
SCOLEX
SIZE: About 1 mm, large.
SHAPE: Round.
ROSTELLUM: Armed with alternating circles of large and small hooklets (22-32).
PROGLOTTID
SIZE: 4 to 7 mm by 12 mm.
SHAPE: Rectangular, longer than broad.
GENITAL PORE: Single, lateral.
UTERUS: Tubular when mature, gravid. proglottid contains 7 to 13 lateral
uterine branches on one side of the main stem.
OVARIES: Two round.
TESTES: Minute, spherical.
Figure 3-45. Stages of Taenia solium.
MD0842
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