Diphyllobotrium latum

Question 1

It is the Largest Tapeworm of man

Answer 1

Diphyllobotrium latum

Question 2

4 Common Names of Diphyllobotrium latum

Answer 2

o Broadfish T.W
o Russian Broad T.W
o Broad T.W
o Fish T.W

Question 3

New Name of Diphyllobotrium latum

Answer 3

Dibothriocephalus latus

Question 4

Habitat

Answer 4

Small Intestine

Question 5

Diagnostic stage

Answer 5

Egg/Scolex

Question 6

Infective Stage

Answer 6

Plerocercoid Larva

Question 7

1st Intermediate Host

Answer 7

Copepods (Cyclops, Diaptomus)

Question 8

2nd Intermediate Host

Answer 8

Freshwater fishes

Question 9

Larval Stages

Answer 9

o Coracidium
o Procercoid
o Plerocercoid

Question 10

Mode of Transmission

Answer 10

Ingestion

Question 11

Adult

Answer 11

o Length: 3-10m
o Mistaken with Spirometa
 Dogs and Cats
 2nd Intermediate Host: Fish, Reptile,
Amphibians

Question 12

Scolex

Answer 12

 Spatulate/Spoon/Almond Shaped
 With 2 bothrium (slit-like sucking organ)

Question 13

Uterus

Answer 13

Rosette-like appearance

Question 14

Strobila

Answer 14

 Up to 4000 proglottids
 Have Uterine Pore

Question 15

Ova

Answer 15

o 1 million ova/day
o Unembryonated
o Operculum on one end and terminal-like on the opposite
o With underdeveloped coracidium
o Mistaken with Paragonimus westermani

Question 16

Pathology (Tapeworm/Brothriocephalus anemia)

Answer 16

 Adult may take up large amount of Vitamin B12
(Cobalamins) – animal
 Macrocytic (enlarged RBC), Megaloblastic
(immature) anemia
 Presence of Megaloblastoc Cells In the
Circulation

Question 17

Pathology (Pernicious Anemia)

Answer 17

 Vitamin B12 deficiency
 Also Megaloblastic
 Exhibits Achlorhydria – Lack of Gastric Acid
 No Intrinsic Factor – for the absorption of the
Vitamin B12 in the intestine
 Due to the absence of Gastric Cells –
Gastric Acid

Question 18

Laboratory Diagnosis (Stool Exam)

Answer 18

 DFS, Kato-Katz
 Look for Egg or Scolex

Question 19

Laboratory Diagnosis (Examination for Gastric Juice)

Answer 19

 Free hydrochloric acid
 To differentiate Diphyllobotriasis from
Pernicious Anemia

Question 20

Treatment

Answer 20

Praziquante