Tapeworm Phyla

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Questions and Answers

Quae est forma corporis in platyhelminthes ordine Cyclophyllidea?

Spatulata

Ribbon-like (correct)

Cylindrica

Globular

Quae est characteristicum scolex in platyhelminthes ordine Cyclophyllidea?

Ribbon-like with genital pores

Globular with four muscular suckers (correct)

Spatulata with bothria

Cylindrica with uterine pores

Quae est necessitas hostium in platyhelminthes ordine Cyclophyllidea?

Intermediate host is required (correct)

Middle host is required

No host is required

Final host is required

Quae est species platyhelminthis ordine Pseudophyllidea?

Diphyllobothrium latum Signup and view all the answers

Quae est characteristicum segmentorum in platyhelminthes ordine Cyclophyllidea?

Genital pores and uterine pores Signup and view all the answers

Quae est species platyhelminthis ordine Cyclophyllidea?

Taenia saginata Signup and view all the answers

Quae species pulicis humano affligit?

Pulex irritans Signup and view all the answers

Quid est forma membranae Hymenolepis nana?

Elongated Signup and view all the answers

Quae species vermiculi in canibus invenitur?

Dipylidium caninum Signup and view all the answers

Quid estcharacteristica ova Hymenolepis diminuta?

Motile, white, and rice-grain like Signup and view all the answers

Quae species pulicis affligit canes?

Ctenophalides canis Signup and view all the answers

Quae est pars corporis Hymenolepis nana quae degenerat priusquam excretio?

Proglottids Signup and view all the answers

Quae species vermiculi invenitur in homine?

Hymenolepis nana Signup and view all the answers

Quid est forma membranae Tribolium spp.?

Spherical Signup and view all the answers

Quale est caracteristicum morphologicum communem Hymenolepis nana et Hymenolepis diminuta?

Cuplike suckers quartuor Signup and view all the answers

Quae est differentia inter numerum segmentorum Hymenolepis nana et Hymenolepis diminuta?

1000-2000 segmenta in Hymenolepis diminuta Signup and view all the answers

Quale est nomem communem Hymenolepis nana?

Dwarf tapeworm Signup and view all the answers

Quae est differentia inter longitinem Hymenolepis nana et Hymenolepis diminuta?

25 to 45 mm in Hymenolepis nana Signup and view all the answers

Quae est characteristica anatomica Hymenolepis nana?

Scolex subglobularis Signup and view all the answers

Quae est characteristica Hymenolepis diminuta in ciclo vitae?

Singly apolysis Signup and view all the answers

Quae est similaritas inter Hymenolepis nana et Hymenolepis diminuta?

Both have 4 cuplike suckers Signup and view all the answers

Quae est differentia inter oculum affectum Hymenolepis nana et Hymenolepis diminuta?

Ophthalmic cysticercosis in Hymenolepis nana Signup and view all the answers

Study Notes

Cyclophyllidean vs. Pseudophyllidean

Corpora ribbon-like, flat,-middle (intermediate host is required)
Scolex: spatulated with bothria (Pseudophyllidean), globular with four muscular suckers (Cyclophyllidean)

Pseudophyllidean

Familia: A. Pseudophyllidea
Genera: Diphyllobothrium, Spirometra (S. erinacei, S. mansoni, S. ranarum)
Segments: with genital pores and uterine pores

Cyclophyllidean

Familia: B. Cyclophyllidea
Genera: Taenia, Hymenolepis (H. nana, H. diminuta), Dipylidium, Raillietina
Segments: without uterine pores, undergoes apolysis, two membranes: outer and inner

Diagnosis

Demonstratio ovorum in stercore
Light infection: concentratio stercore on alternate days, examinatio stercore repeated after 2 weeks
Nota: Hymenolepis nana: proglottids are not recovered, undergo degeneration prior to passage with stools; Hymenolepis diminuta: at time whole worm is expelled

Characteristics of Worms

Dipylidium caninum: recovery of gravid segments
Raillietina garrisoni: recovery of gravid segments
Ova: subspherical with a brown radially striated embryophore, cannot be differentiated from Taenia eggs

Hymenolepis Nana vs. Hymenolepis Diminuta

Nomen commune: Dwarf tapeworm (Hymenolepis nana), Rat tapeworm (Hymenolepis diminuta)
Longitudo: 25-45 mm (Hymenolepis nana), 60 mm (Hymenolepis diminuta)
Apolysis: in chains (Hymenolepis nana), singly (Hymenolepis diminuta)
Number of eggs/gravid proglottid: 30,000-50,000 (Hymenolepis nana), 80,000 (Hymenolepis diminuta)
Egg: 31-56 micra in diameter with oncosphere