Lab 10 - Mange

Question 1

Where do Sarcoptes mites belong?

Answer 1

Order Acariformes – Sub-order Astigmata – Burrowing mites

Question 2

Where do Psoroptes mites belong?

Answer 2

Order Acariformes – Sub-order Astigmata – Non-burrowing mites

Question 3

Which mites have short legs?

Answer 3

Burrowing mites: Sarcoptes, Knemidokoptes, Notoedres spp.

Question 4

Which mites have long legs?

Answer 4

Non-burrowing mites: Choriptes, Otodectes, Psoroptes spp.

Question 5

Which species has notoedric mange?

Answer 5

Dog

Question 6

Which mite is viviparous?

Answer 6

Knemidokoptes spp.

Question 7

How many nymph stages are there during the development of mange mites?

Answer 7

2 nymph stages

Question 8

Which have no respiratory openings?

Answer 8

Mange mites (Sub-order Astigmata)

Question 9

Species of this genus of mites are able to survive off the host for a few days only:

Answer 9

-Sarcoptes spp.: since they are burrowing mites
-Burrowing mites: Sarcoptes, Knemidokoptes, Notoedres spp.
(Non- burrowing mites can last a maximum of 2-3 weeks off the host)

Question 10

Which of the following have 3 segmented pedicels on the end of its legs?

Answer 10

Psoroptic mites

Question 11

These mites can sometimes cause anemia during heavy infection:

Answer 11

Psoroptic mites

Question 12

These mites are able to consume tissue fluids:

Answer 12

Psoroptic mites

Question 13

What chemicals are applied to dissolve the keratinous part of skin scrapings?

Answer 13

Alkaline chemicals such as NaOH, KOH

Question 14

This species occurs mainly in the lower parts of the legs?

Answer 14

Chorioptes bovis

Question 15

This species can be infected by only one species of mange mites?

Answer 15

Pig: Sarcoptes scabiei var. suis

Question 16

The species of mites that burrow into skin?

Answer 16

Sarcoptes, Knemidokoptes, Notoedres spp.

Question 17

Which methods are used for the diagnosis of Notoedric mange?

Answer 17

Skin scraping since they are burrowing mites.

Question 18

Which method is used for the diagnosis of Sarcoptic mange?

Answer 18

Skin scraping since they are burrowing mites.

Question 19

Which is the causative agent of depluming itch?

Answer 19

Knemidokoptes gallinae. Affecting poultry.

Question 20

Which is the causative agent of scaly leg?

Answer 20

Knemidokoptes mutans. Affecting poultry and cage birds.

Question 21

Which have sarcoptic mange?

Answer 21

Pig (all except cats and birds)

Question 22

Which have otodectic mange?

Answer 22

Cat

Dog has otoedric mange