(F) Cestodes: T. solium and saginata of Cyclophyllidea (module-based) Flashcards
module-based beh
- It has a cosmopolitan distribution
- larval worm infection, called cysticercosis is possible with this species
- some group of people that do not eat pork because of their tradition are unlikely to become infected
TAENIA SOLIUM
TAENIA SOLIUM AKA
Pork tapeworm
TAENIA SOLIUM
larval worm infection is called?
cysticercosis
TAENIA SOLIUM
Where does the adult inhabit?
- upper part of the jejunum with its scolex attached to the mucosa
- body folded back and forth in the lumen of the intestine
TAENIA SOLIUM
life span
may be more than 25 years.
TAENIA SOLIUM
Definitive host and intermediate host
Man is the usual definitive host. Pigs are the intermediate host.
TAENIA SOLIUM
source of the infective stage
oink oink
TAENIA SOLIUM
Size of adult worm
2-7 meters long
TAENIA SOLIUM
Match Morphology:
1. broader than long
2. nearly square
3. longer than broad
4. alternate irregularly at the lateral margins of the segments
5. elliptical groups of follicles, median in position behind the ovary
A. genital pores
B. vitellaria
C. Immature segments
D. mature proglottids
E. gravid segment
CDEAB
TAENIA SOLIUM: MORPHOLOGY
usual number of distinct proglottids
less than 1000
TAENIA SOLIUM: LIFE CYCLE
MOT of Man
ingestion of inadequately cooked pork with cysticercus cellulosae larvae
p’wede rin embryonated egg
need complete
TAENIA SOLIUM: LIFE CYCLE
Stomach juices digest the pork causing the release of the larvae, will evaginate their scolices when they reach the?
upper level of the small intestine
TAENIA SOLIUM: LIFE CYCLE
The worm attaches, by means of the scolex, to the wall of the small intestine and becomes adult after how many weeks?
5-12 weeks
TAENIA SOLIUM: LIFE CYCLE
Eggs escape from the ruptured uterus of the gravid proglottids and are, together with feces deposited in?
SOIL
TAENIA SOLIUM: LIFE CYCLE
MOT of pigs
ingestion of the embryonated egg
TAENIA SOLIUM: LIFE CYCLE
TOF. The egg hatches as it passes in the duodenum and jejunum of the pig.
T
TAENIA SOLIUM: LIFE CYCLE
What penetrates the wall of the intestine to enter the mesenteric venules
Released oncosphere
TAENIA SOLIUM: LIFE CYCLE
Released oncosphere penetrates the wall of the intestine to enter the mesenteric venules and carried throughout the body where it develops into the?
cysticercus cellulosae larvae
TAENIA SOLIUM: CLINICAL MANIFESTATIONS
TOF. Taeniasis solium produces no serious damage or grave manifestation.
T
TAENIA SOLIUM: CLINICAL MANIFESTATIONS
It may produce slight local inflammation of the intestinal mucosa due to mechanical irritation by the? (2)
strobila and the attached scolex
TAENIA SOLIUM: CLINICAL MANIFESTATIONS
TAENIA SOLIUM: CLINICAL MANIFESTATIONS
found in practically all organs and tissues of man and symptoms vary according to the number of the larva present as well as their location
Cysticercus cellulosae
TAENIA SOLIUM: CLINICAL MANIFESTATIONS
Common locations of Cysticercus cellulosae
subcutaneous and intermuscular tissues
TAENIA SOLIUM: CLINICAL MANIFESTATIONS
resemble small lipomas
Subcutaneous cysts
removed surgically usually for diagnostic purposes
Subcutaneous cysts
TAENIA SOLIUM: CLINICAL MANIFESTATIONS
The larva provokes a typical sequence of local cellular reactions that include infiltration of?
five
neutrophils, eosinophils, lymphocytes, plasma cell, and giant cells
TAENIA SOLIUM: CLINICAL MANIFESTATIONS
Cysticercosis may also involve the eyes, brain, liver, lungs, and abdominal cavity. Except in the?
Except in the eye, ventricles of the brain and subarachnoid spaces of the cranium and rachi, the cysticercus is surrounded with a fibrous capsule.
TAENIA SOLIUM: CLINICAL MANIFESTATIONS
Cellular response is followed with?
fibrosis and necrosis
ibrosis and necrosis of the capsule with eventual caseation or calcification of the larvae
TAENIA SOLIUM: CLINICAL MANIFESTATIONS
It usually involves the voluntary muscles and there may be?
myositis with fever and eosinophilia
TAENIA SOLIUM: CLINICAL MANIFESTATIONS
non-encapsulated and may actively change shape with periodic extroversion and introversion of the scolex
Living cysticerci