Diphyllobothrium dendriticum

Question 1

Epizootiology of Diphyllobothrium dendriticum

Answer 1

Consumption of raw fish

Question 2

Order of Diphyllobothrium dendriticum

Answer 2

pseudophyllida

Question 3

Geography of Diphyllobothrium dendriticum

Answer 3

Arctic and subarctic region

Question 4

IH of Diphyllobothrium dendriticum

Answer 4

• 1st IH: Water crustaceans - copepods
• 2nd IH: Fish

Question 5

FH of Diphyllobothrium dendriticum

Answer 5

Man, fish eating mammals and birds

Question 6

Location of Diphyllobothrium dendriticum

Answer 6

• 2nd IH: muscle
• FH: SI

Question 7

Morphology of Diphyllobothrium dendriticum

Answer 7

1m length, 1 cm width

Question 8

Pathogenesis of Diphyllobothrium dendriticum

Answer 8

Strong affinity for Vit B12 – important for forming erythrocytes in FH, leads to anemia

Question 9

CS of Diphyllobothrium dendriticum

Answer 9

Obstruction of SI – diarrhea or stop of feces.
Enteritis, anemia, anorexia, fatigue, dizziness, nausea, vomitus, hungry patient

Question 10

Dx of Diphyllobothrium dendriticum

Answer 10

Proglottids or egg in feces

Question 11

Tx of Diphyllobothrium dendriticum

Answer 11

Praziquantel + Niclozamide

Question 12

Control of Diphyllobothrium dendriticum

Answer 12

Heat treatment of fish meat

Question 13

LC of Diphyllobothrium dendriticum

Answer 13

1. In Pseudophyllida, the egg reaches the water together with the host’s feces, embryonates and eventually hatches and develops into a ciliated embryo – coracidium.
2. These motile coracidia have to be taken up by 1st IH (copepods) within a short time. Once inside the gut of the 1IH, the oncosphere sheds the ciliated layer and invades and differentiates into a procercoid.
3. In the 2nd IH (fish), procercoid develops into a plerocercoid, which forms into the muscle.
4. FH (human) eats the uncooked, infected fish. Adult tapeworm is developed in the SI

Question 14

Larvae stage of Diphyllobothrium dendriticum

Answer 14

• 1st IH: procercoid
• 2nd IH: plerocercoid