Para Lab 8
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PARASITOLOGY LABORATORY 8 – Intestinal Cestodes USTMED ’07 Sec C – AsM; Photos provided by JV.N.
DIPHYLLOBOTHRIUM LATUM
Egg packets in fecal smears. The typical egg packet of D. caninum. These packets usually contain 8-15 eggs, each of which contains an oncosphere. The oncospheres, each with their 6 hooklets. Dipylidium caninum – ova
Diphyllobothrium latum Ova
Dipylidium caninum scolex
The eggs of this tapeworm are discharged from the proglottids and pass out in feces in an unembryonated condition. The egg is ovoid and moderately large. Diphyllobothrium latum – ova
The scolex of this carmine-stained, adult cestode has four large suckers and a conical rostellum bearing many rows of small spiens. Diphyllobothrium latum ripe segment
Dipylidium caninum – scolex
Dipylidium caninum Immature segment
Diphyllobothrium mansoni Ripe segment Dipylidium caninum – Mature and Ripe
DIPYLIDIUM CANINUM Dipylidium caninum proglottid Dipylidium canincum Ova
This gravid, carmine-stained proglottid illustrates the compartmentalized nature of the uterus and the two, laterally placed, genital pores so characteristic of the species.
Dipylidium caninum composite
filament. Hymenolepsis diminuta ova
Hymenolepsis diminuta – gravid segment composite
HYMENOLEPSIS NANA Raillietina garrisoni segment (?) Hymenolepsis nana ova
The clear, thin shelled eggs of H. nana are spherical to ovoid in shape, and contain a six-hooked embryo (oncosphere) when passed in feces. Its prominent characteristics is the filament that arise from polar thickening of the inner envelope surrounding the oncosphere. Hymenolepsis nana Ripe segment
Hymenolepsis nana – mature segment
Hymenolepsis nana – Entire worm (adult)
HYMENOLEPSIS DIMINUTA Hymenolepsis diminuta ova
The H. diminuta egg is spherical and clearly differentiated from that of H. nana. It is larger, has a thicker shell, is bile-stained, and the inner envelope surrounding the oncosphere lacks polar
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DIPHYLLOBOTHRIUM LATUM
Egg packets in fecal smears. The typical egg packet of D. caninum. These packets usually contain 8-15 eggs, each of which contains an oncosphere. The oncospheres, each with their 6 hooklets. Dipylidium caninum – ova
Diphyllobothrium latum Ova
Dipylidium caninum scolex
The eggs of this tapeworm are discharged from the proglottids and pass out in feces in an unembryonated condition. The egg is ovoid and moderately large. Diphyllobothrium latum – ova
The scolex of this carmine-stained, adult cestode has four large suckers and a conical rostellum bearing many rows of small spiens. Diphyllobothrium latum ripe segment
Dipylidium caninum – scolex
Dipylidium caninum Immature segment
Diphyllobothrium mansoni Ripe segment Dipylidium caninum – Mature and Ripe
DIPYLIDIUM CANINUM Dipylidium caninum proglottid Dipylidium canincum Ova
This gravid, carmine-stained proglottid illustrates the compartmentalized nature of the uterus and the two, laterally placed, genital pores so characteristic of the species.
Dipylidium caninum composite
filament. Hymenolepsis diminuta ova
Hymenolepsis diminuta – gravid segment composite
HYMENOLEPSIS NANA Raillietina garrisoni segment (?) Hymenolepsis nana ova
The clear, thin shelled eggs of H. nana are spherical to ovoid in shape, and contain a six-hooked embryo (oncosphere) when passed in feces. Its prominent characteristics is the filament that arise from polar thickening of the inner envelope surrounding the oncosphere. Hymenolepsis nana Ripe segment
Hymenolepsis nana – mature segment
Hymenolepsis nana – Entire worm (adult)
HYMENOLEPSIS DIMINUTA Hymenolepsis diminuta ova
The H. diminuta egg is spherical and clearly differentiated from that of H. nana. It is larger, has a thicker shell, is bile-stained, and the inner envelope surrounding the oncosphere lacks polar
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