Parasitology Part 1

Medically
Important

Taenia saginata

Echinococcus granulosus

Hymenolipes nana

(beef tapeworm)

E. multiocularis

(dwarf tapeworm)

Taenia solium

E. vogari

Hymenolipes diminuta

(pork tapeworm)

E. oligarthus

(rat tapeworm)

1- Diphyllobothriasis

T. saginata :

Cystic echinococcosis

2- Pernicious anemia

intestinal taeniasis

(hydatid tapeworm infection)

T. solium :

which is either primary or

Intestinal taeniasis &

secondary

Diphyllobothrium latum

Spp.

Disease

Human hymenolepiasis

cysticercosis
1st : fresh water cepepods

Taenia saginata :

Intermediate

including cyclops

cow & buffalo

host

2nd :

Taenia solium :

fresh water predator

Man & herbivorous animals

NO

Dogs & carnivorous animals

Human & rodents

Adult worm is found attached to wall of

ileal portion of small intestine

pig , occasionally human

fish (salmon)
Definitive

Human

host

also dogs , cats

Habitat

small intestine of man,

Human

mainly ileum or

small intestine (upper jejunum) of

jejunum

man

intestinal mucosa of dogs & wild canines, but not in human. Only larval stage

of man & rodents

(hydatid stage) is found in human & herbivorous animals

Infective

3rd stage larva

T. saginata is cysticercus bovis

Stage

(plerocercoid)

T. solium is c.cellulosae & eggs

Embryonated eggs in feces

Embryonated eggs in feces

Diagnostic

Eggs in feces, also

eggs in feces or frequently

Stage

sometimes proglottids

progglottids & scolex in feces

Hydatid cyst in liver, lung, etc..

Embryonated eggs in feces

Fecal oral route

Fecal oral route

A- Hydatid fluid microscopy

A- Detection of eggs in feces

B- Serological tests – ELISA &

by direct smear, salt

IHA

floatation, & formalin ether

C- Imaging methods - X-ray,

sedimentation methods.

CT, US & MRI

B- 1/3 of infected children

are seen in feces
Route of

Fecal oral route

Fecal oral route

Transmission

Diagnostic

1- Microscopy

Method

2- Coproantigen

(Lab Dignosis)

detection test

Stool microscopy ***

have