Order strongylida: hookworms

Question 1

Male worms from this order have copulatory bursa derived from cuticle

Answer 1

The Order: Strongylida

Question 2

Large, highly sclerotized buccal capsule with cutting teeth or
plates

Answer 2

The Order: Strongylida

Question 3

Duct of dorsal esophageal gland usually in a dorsal gutter on
inner surface of the buccal capsule
● one dorsal ray on male copulatory bursa
● gubernaculum present
● female tail with terminal spine
● vulva posterior to mid-body
● predominately in carnivores and omnivores; few in herbivores

Answer 3

Ancylostomatinae

Question 4

Members have a tooth-like dorsal cone supporting the duct of the dorsal
esophageal gland
2 dorsal rays on male copulatory bursa
gubernaculum absent
female tail without terminal spine
with one exception, vulva in anterior one-half of body
predominately in omnivores and herbivores; few in carnivores and
primates

Answer 4

Bunostominae

Question 5

New-World Hookworm

Answer 5

Necator americanus

Question 6

Old-World Hookworm

Answer 6

Ancylostoma duodenale

Question 7

cat/ dogs hookworm

Answer 7

Ancylostoma braziliense

Question 8

Should you recover the adult Hookworm, easier differentiation is done by

Answer 8

observing the buccal capsule.

Question 9

N. americanus – semi-lunar _________
A. duodenale – _____ pairs of ventral teeth
A. caninum – ___ pairs of ventral teeth
A. ceylanicum – 2 pairs of __________ with outer bigger than the inner pair
A. braziliense – a pair of __________

Answer 9

N. americanus – semi-lunar cutting plates
A. duodenale – 2 pairs of ventral teeth
A. caninum – 3 pairs of ventral teeth
A. ceylanicum – 2 pairs of ventral teeth with outer bigger than the inner pair
A. braziliense – a pair of big teeth

Question 10

ventral pair of semilunar cutting plates
* transmitted ONLY
through skin
penetration
* head is curved
opposite to the body
curvature

Answer 10

Necator americanus

Question 11

Transmitted percutaneously,
orally, or probably
transplacentally

Answer 11

Ancylostoma duodenale

Question 12

WAKANA disease

Answer 12

Ancylostoma duodenale

Question 13

primarily infects dogs
* humans are dead end hosts

Answer 13

Ancylostoma
caninum

Question 14

Pathology of hookworms

Answer 14

1. The skin as the site of entry
2. Pneumonitis
3. Intestinal phase

Question 15

Diagnosis:

Answer 15

1. Demonstration of 2-8 cell stages egg in the
   feces
2. Larva is not seen in feces (unless the
   specimen is left for 24 hours)
3. Harada mori culture

Question 16

The three STH

Answer 16

Hookworm, Trichuris trichiura, Ascaris lumbricoides

Question 17

Longevity of juveniles and
adults

Answer 17

juveniles: 3 wks to 1 year under
favorable conditions
Adults : 5 to 15 years

Question 18

T/F. White people are more susceptible than black people

Answer 18

true