taenia saginata

Question 1

distribution

Answer 1

worldwide
several million infections
more common in poorer countries

Question 2

morphology

Answer 2

2-20m long with 1000-2000 segments

4 suckers on scolex

Question 3

intermediate host

Answer 3

cattle - juvenile cestode in tissues

Question 4

definitive host

Answer 4

humans - adult in gut

Question 5

symptoms

Answer 5

can be asymptomatic
fullness and mild pain

usually noticed when proglottids in stool or crawl onto bedding

Question 6

eggs

Answer 6

do not infect humans - only cysticercus is infective to humans and only adult worm present

eggs indistinguishable from each other

Question 7

distinguishing between Tania

Answer 7

pcr
antigen testing
antibody tests

differences in adults
more branches in saginata and more eggs per proglottid but less passed per dat

Question 8

treatment and control

Answer 8

praziquantel, albendazole, niclosamide

improved sanitation
chemo of humans and pigs
vaccination of pigs
meat inspection

Question 9

epidemiology

Answer 9

Egg survival –warm, moist soil
Sanitation –infective sewage
Adult stages only in humans –long survival
Cysticerci survive 2-3 years in intermediate host
Consumption of inadequately cooked beef/pork
Insufficient inspection at animal slaughter

Question 10

what is needed for control and elimination

Answer 10

•access to preventive chemotherapy;
identification and treatment of taeniasiscases;
health education;
improved sanitation;
improved pig husbandry;
anthelmintic treatment of pigs;
vaccination of pigs;
improved meat inspection and processing of meat products.