ALAT Animal Health and Welfare 4

Question 1

Which of the following is a common clinical sign of pinworm (Syphacia or Aspiculuris) infestation in mice?

Accepted Answer

Perianal pruritus and rectal prolapse in severe cases

Answer

Pinworm infestations in mice can cause perianal irritation and, in heavy infestations, rectal prolapse, though many infections are subclinical.

Question 2

In assessing rabbit welfare using the Grimace Scale, which facial feature is evaluated?

Accepted Answer

Orbital tightening, cheek flattening, nose shape, whisker position, and ear shape

Answer

The Rabbit Grimace Scale evaluates five facial action units including orbital tightening, cheek flattening, nose shape, whisker position, and ear shape to assess pain.

Question 3

A technician observes a rat with a red-tinged discharge around the eyes and nose. This substance is most likely:

Accepted Answer

Porphyrin pigment, which can be a sign of stress or illness

Answer

Red-brown porphyrin pigment produced by the Harderian gland can indicate stress, illness, or poor husbandry conditions in rats.

Question 4

Which of the following conditions is MOST likely to compromise the immune status of laboratory mice and affect research outcomes?

Accepted Answer

Subclinical viral infection such as mouse hepatitis virus (MHV)

Answer

Mouse Hepatitis Virus (MHV) is an immunomodulating pathogen that can alter immune responses and significantly confound research results.

Question 5

Under the Animal Welfare Act, which species are NOT covered by federal welfare protections?

Accepted Answer

Rats, mice, and birds bred for research

Answer

The AWA specifically excludes rats of the genus Rattus, mice of the genus Mus, and birds bred for use in research from its coverage.

ALAT - Assistant Laboratory Animal Technician Practice Test

ALAT - Assistant Laboratory Animal Technician Practice Test

ALAT Animal Health and Welfare 4