NAVLE Veterinary Public Health Questions and Answers

Question 1

A USDA veterinarian performing post-mortem inspection on a steer carcass finds multiple, well-demarcated, caseous abscesses in the lungs and associated mediastinal lymph nodes.
What is the correct disposition for this carcass?

Accepted Answer

Condemn the entire carcass.

Answer

Pass for human consumption after trimming affected parts.

Answer

Pass for cooking only.

Answer

Condemn the thoracic organs and pass the rest of the carcass.

Question 2

A pregnant veterinary technician is assisting with a feline dystocia. The queen, a former stray, expels a large amount of brownish placental fluid. The supervising veterinarian should advise the technician that she is at an increased risk of exposure to which zoonotic agent via aerosolization of these birth fluids?

Accepted Answer

Coxiella burnetii

Answer

Toxoplasma gondii

Answer

Bartonella henselae

Answer

Microsporum canis

Question 3

A new pen-side antigen test for Bovine Respiratory Syncytial Virus (BRSV) is evaluated in a group of 300 calves. The results are as follows: 85 calves that are truly positive for BRSV test positive. 190 calves that are truly negative for BRSV test negative. 15 truly positive calves test negative. 10 truly negative calves test positive. What is the specificity of this new test?

Accepted Answer

95.0%

Answer

85.0%

Answer

90.9%

Answer

91.7%

Question 4

A veterinarian is called to a swine operation to investigate an outbreak of high fever, anorexia, and vesicular lesions on the snouts and coronary bands of multiple pigs. What is the most critical and immediate first action for the veterinarian to take?

Accepted Answer

Contact the State Veterinarian or USDA-APHIS Area Veterinarian in Charge.

Answer

Initiate treatment with broad-spectrum antibiotics to prevent secondary infections.

Answer

Euthanize affected pigs to prevent further spread and collect post-mortem samples.

Answer

Advise the producer to quarantine the farm and ship samples to a local diagnostic lab.

Question 5

According to USDA-APHIS regulations, which of the following diseases requires IMMEDIATE notification by an accredited veterinarian to state or federal animal health officials if suspected?

Accepted Answer

Foot-and-Mouth Disease (FMD)

Answer

Bovine Viral Diarrhea (BVD)

Answer

Anaplasmosis

Answer

Johne's Disease

Question 6

A beef cattle producer wishes to use a medicated feed containing chlortetracycline to control an active anaplasmosis infection. What must a veterinarian provide to legally authorize the producer to obtain and use this feed?

Accepted Answer

A valid Veterinary Feed Directive (VFD) order.

Answer

A standard prescription on a state-approved script pad.

Answer

Verbal authorization communicated directly to the feed mill.

Answer

A signed letter on clinic letterhead describing the intended use.

A USDA veterinarian performing post-mortem inspection on a steer carcass finds multiple, well-demarcated, caseous abscesses in the lungs and associated mediastinal lymph nodes.What is the correct disposition for this carcass?

A USDA veterinarian performing post-mortem inspection on a steer carcass finds multiple, well-demarcated, caseous abscesses in the lungs and associated mediastinal lymph nodes.
What is the correct disposition for this carcass?