Order ascaridida

Question 1

Anterior end
3 lips with dentigerous ridge

Answer 1

: Ascaris lumbricoides

Question 2

Reinfection rate (Ascaris lumbricoides)

Answer 2

High reinfection
50% of eggs within 10 years remain infective
Vegetables, dust, chickens, banknotes

Question 3

Eggs (Ascaris lumbricoides)

Answer 3

Oval
Mamillated layer
Unembryonated
Soil embryonation

Question 4

Medicine for Ascaris lumbricoides

Answer 4

Mebendazole targeting tubulin

Question 5

the single greatest cause of economic loss in the swine industry

Answer 5

Ascaris suum

Question 6

Medicine for Ascaris suum

Answer 6

piperazine

Question 7

Worm knotting intestinal blockage

Answer 7

Ascaris suum

Question 8

Aggravated by hookworm toxin

Answer 8

Worm knotting intestinal blockage

Question 9

May migrate to mouth, ears, lungs

Answer 9

Clogged appendix, anus, bile ducts due to overcrowding

Question 10

Ascaris suum embryonated or unembryonated

Answer 10

Unembryonated eggs

Question 11

Pathology of Ascaris lumbricoides

Answer 11

1.) small hemorrhages
2.) inflammatory response lead to ascaris pneumonitis
3.) abdominal pain due to toxins
4.) malnutrition
5.) intestinal blockage due to tangled worms

Question 12

Infective stage of ascaris suum

Answer 12

L2 larvae

Question 13

Why is there this migratory
phase?

Answer 13

1. Evolutionary: intermediate
   host
2. Evolutionary: ancestor is
   skin penetrator

Question 14

Ascaris lumbricoides adults typically live

Answer 14

a year

Question 15

time from
ingestion of the L2 in egg until L4
reach the small intestine

Answer 15

about 25 days.