T H E AMERICAN JOURNAL OF CLINICAL PATHOLOGY
Vol. 40, No. 1, pp. 83-80
.Inly, 1963
Copyright © 1903 by The Williams & Wilkins Co.
Printed in U.S.A.
DIAGNOSTIC PATTERNS
CESTODAL
INFECTIONS
OF
MAN
S. E. GOULD, M.D., D. L. HINERMAN, M.D., J. G. BATSAKIS, M.D., AND P. R. BEAMER, M.D.
Departments of Pathology, Wayne Counly General Hospital, Eloise, Michigan, Wayne State University
College of Medicine, Detroit, Michigan, University of Michican Medical School, Ann Arbor, Michigan,
and Indiana University School of Medicine, Indianapolis, Indiana*
FIG. 1 (left). Scolex of Taenia saginata (beef tapeworm). X 65. The adult worm is 5 to 10 m. long and
has 1000 to 2000 segments. The scolex has no rostellum or hooklets, is quadrate in cross-section, has a
maximal diameter of 1.5 to 2 mm., and is provided with 4 cupped suckers, each 0.7 toO.S mm. in diameter.
The neck is not more than one-half as broad as the head.
FIG. 2 (right). Scolex of Taenia solium (pork tapeworm). X 90. The adult worm measures 2 to 7 m.
in length and has less than 1000 segments. The scolex is globular, measures approximately 1 mm. in
diameter, possesses 4 circular suckers, each 0.5 mm. in diameter, and a rounded rostellum armed with
a double row of alternating large and small hooklets. The neck is short and approximately one-half as
broad as the head.
species incriminate es identificate in \e
legendas.
SUMMAKLO IN I N T E R L I N G U A
Es presentate un serie de microphotographias de infectiones per cestodos. Le
Medicine; Drs. Hinerman and Batsakis are on the
staff at University of Michigan Medical School;
and Dr. Beamer is on the staff of Indiana University School of Medicine.
* Dr. Gould is on the staff of Wayne County General Hospital, University of Michigan Medical
School, and Wayne State University College of
83
84
DIAGNOSTIC PATTERNS
Vol. Ifi
F I G . 3 (upper left). M a t u r e segment of
Taenia saginata. X 7. T h e m a t u r e segment is
longer t h a n broad, and a gravid segment measures approximately 20 mm. long and 5 t o 7 mm.
broad. T h e uterus has a central longitudinal
stem with 15 to 20 bilateral branches. T h e
common genital pore is situated marginally
beyond the middle of the segment. This tapeworm develops in man as a result of ingestion of
incompletely cooked beef containing a Cyslicercus bovis.
F I G . 4 (upper r i g h t ) . Gravid segment of
Taenia solium. X 8. The uterus has been injected with a dye. I t usually has 7 to 13 lateral
branches on each side (average of 9). T h e common genital pore is present marginally in t h e
midplane. Gravid segments are expelled passively in chains of 5 or 6 a t a time.
F I G . 5 (lower). Eggs of Taenia sp. X 5G0. The
eggs are spherical or subspherical, measure 31
to 43 n in diameter, and are brown. The shell
is thick-walled, radially striated, and encloses a
fully developed oncosphere which has 3 pairs of
hooklets.
July 1963
DIAGNOSTIC PATTERNS
i f * '•.,
•W^i^
f
85
F I G . 6 (upper left). Cyslicercus cellulosae in
heart of dog. X V/2- T h e larval or cystic stage
develops in the muscles or other tissues of t h e
pig or man as a result of ingestion of the egg
of Taenia solium. T h e cysts are opalescent,
ellipsoid, 8 t o 10 mm. long and 5 mm. broad,
thin-walled, and contain a serous albuminous
fluid. Some of t h e cysts illustrated here have
ruptured. Man is the definitive host of this tapeworm, which results from ingestion of t h e
cysts in incompletely cooked pork.
F I G . 7 (upper right). C. cellulosae in brain.
X 10. In this section note the papillary folds of a
Cysticercus in t h e brain. T h e outer layer of t h e
cyst has a homogeneous cuticular lining t h a t is
partially corrugated and an internal single
layer of germinal epithelium. The surrounding
brain tissue manifests chronic inflammatory reaction and gliosis.
F I G . S (lower). D a u g h t e r cyst of hydatid
cyst X 280. This brood capsule of a hydatid cyst
has a single layer of germinal epithelium and
contains 4 scolices, each scolex having an invaginated rostellum and booklets. In t h e lower
portion of figure, note portion of homogeneous
hyaline cyst wall. Canine animals are the definitive hosts of Echinococcus granulosus. T h e hydatid cyst develops in man or other intermediate
host as a result of ingestion of egg.
86
DIAGNOSTIC PATTERNS
Vol. 40
F I G . 9 (upper left). Egg of
Diphyllobothrium latum (fish tapeworm). X 500. The egg;
is oval, brown, approximately 70 ti in length
and 45 n in breadth, has a small operculum
a t 1 end, and contains an unsegmented
ovum. In water, the ciliated embryo (coracidium) develops within the egg shell, escapes, and is ingested by a cyclops in which
it forms a procercoid larva. The cyclops
is ingested by a fresh-water fish in which a
plerocercoid larva develops.
F I G . 10 (upper middle). Plerocercoid of
D. latum. X 8. Within the flesh or other tissues of a suitable fish host, the "sporganum"'
or plerocercoid larva is white, flattened, and
measures 4 to 20 mm. in length. T h e
ingestion of incompletely cooked fish of the
plerocercoid larva by man or other definitive
host results in formation of the tapeworm.
F I G . 11 (upper right). D. latum (fish
tapeworm). X 85. The scolex is elongated
and grooved dorsally and ventrally. Theworm measures 3 to 10 m. in length, and
has 3000 to 4000 segments.
F I G . 12 (lower). Gravid segments, D.
latum. X 7. The mature proglottides are
broader than long and the coil of uterus is
conspicuous in the midline. A gravid segment measures 2 to 4 mm. in length and 10
to 20 mm. in breadth. The uterus is large
and coiled in the form of a rosette, and is
located in the center of the segment.