Identification of Taenia and Hymenolepis Species

16 Questions

Match the following tapeworms with their characteristic number of suckers:

Taenia saginata = 4 Diphylobothrium latum = 2 Echinococcus granulosus = 4 Hymenolepis diminuta = 4

Match the following tapeworms with their characteristic rostellum feature:

Taenia saginata = Absence Taenia solium = Presence with double crown Hymenolepis nana = Short Dipylidium caninum = Club-shaped with 1-7 circles of spines

Match the following tapeworms with their characteristic uterus shape:

Hymenolepis diminuta = Saclike Hymenolepis nana = Saclike Diphylobothrium latum = Central rosette Dipylidium caninum = Full of eggs in enclosed embryonic membrane

Match the following tapeworms with their characteristic hook feature:

Taenia saginata = Absence Taenia solium = Presence with double crown Hymenolepis nana = Presence with one row Echinococcus granulosus = Presence of 36 hooks

Match the following tapeworms with their characteristic shape:

Taenia saginata = Longer than wide, rectangular Taenia solium = Somewhat square Hymenolepis diminuta = Twice as wide as long Dipylidium caninum = Pumpkin seed

Match the following tapeworms with their characteristic lateral branch feature:

Taenia saginata = 15-30 Taenia solium = 7-15 Hymenolepis diminuta = Not applicable Diphylobothrium latum = Not applicable

Match the following tapeworms with their characteristic size:

Taenia saginata = 17.5um by 5.5um Taenia solium = Not applicable Hymenolepis diminuta = Not applicable Echinococcus granulosus = 4.55mm

Match the following tapeworms with their characteristic body component feature:

Echinococcus granulosus = Scolex, small neck, and three proglottids Taenia saginata = Not applicable Taenia solium = Not applicable Diphylobothrium latum = Not applicable

Match the following tapeworms with their characteristic presence of crown on hooks:

Taenia saginata = Absent Taenia solium = Present with double crown Hymenolepis diminuta = Absent Hymenolepis nana = Present with single row

Match the following tapeworms with their characteristic arrangement of spines on rostellum:

Dipylidium caninum = 1-7 circles of spines Taenia saginata = Absent Hymenolepis nana = Short Diphylobothrium latum = Almond shape

Match the following tapeworms with their characteristic number of developmental stages:

Echinococcus granulosus = 3 Taenia saginata = Not specified Hymenolepis nana = Not specified Dipylidium caninum = Not specified

Match the following tapeworms with their characteristic embryonic membrane feature:

Dipylidium caninum = Full of eggs in enclosed embryonic membrane Echinococcus granulosus = Not specified Hymenolepis nana = Not specified Taenia saginata = Not specified

Match the following tapeworms with their characteristic length in micrometers:

Taenia saginata = 17.5um Hymenolepis diminuta = Not specified Echinococcus granulosus = 4.55mm Dipylidium caninum = Not specified

Match the following tapeworms with their characteristic width in relation to length:

Hymenolepis diminuta = Twice as wide as long Hymenolepis nana = Twice as wide as long Taenia saginata = Longer than wide Diphylobothrium latum = Wider than long

Match the following tapeworms with their characteristic number of proglottids:

Echinococcus granulosus = 3 Taenia saginata = Not specified Hymenolepis nana = Not specified Dipylidium caninum = Not specified

Match the following tapeworms with their characteristic presence of neck:

Echinococcus granulosus = Present Taenia saginata = Not specified Hymenolepis nana = Not specified Dipylidium caninum = Not specified

Study Notes

Taenia Saginata

Has four suckers
Rostellum is absent
Hooks are absent
Appearance/shape is longer than wide, rectangular with an average length of 17.5um by 5.5um
Lateral branches are 15-30

Taenia Solium

Has four suckers
Rostellum is present
Hooks are present with a double crown
Appearance/shape is somewhat square
Lateral branches are 7-15

Hymenolepis Diminuta

Has four suckers
Rostellum is present
Hooks are absent
Appearance/shape is twice as wide as long
Has a saclike uterus filled with eggs

Hymenolepis Nana

Has four suckers
Rostellum is present and short
Hooks are present and only have one row
Appearance/shape is twice as wide as long
Has a saclike uterus filled with eggs

Dipylidium Caninum

Has four suckers
Rostellum is present with a club-shaped structure having 1-7 circles of spines
Hooks are absent
Appearance/shape is pumpkin seed-shaped
Is full of eggs in enclosed embryonic membrane

Diphyllobothrium Latum

Has two suckers
Rostellum is present, almond-shaped
Hooks are absent
Appearance/shape is wider than long
Has a central rosette

Echinococcus Granulosus

Has four suckers
Rostellum is absent
Has 36 hooks
Appearance/shape is 4.55mm with a body component of scolex, small neck, and three proglottids, one at each developmental stage (immature, mature, and gravid)

This quiz covers the characteristics and features of Taenia saginata, Taenia solium, and Hymenolepis diminuta. Identify the species based on their morphology, suckers, rostellum, hooks, and lateral branches. Test your knowledge of these parasitic worms!

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