FREE NAVLE Veterinary Public Health Zoonoses Questions and Answers

Question 1

A veterinary public health official is investigating an outbreak of a febrile illness in humans linked to contact with backyard poultry.
Clinical signs in humans include fever, headache, and muscle aches, followed by respiratory symptoms.
Testing of environmental samples from the poultry coop reveals Chlamydia psittaci.
What is the most appropriate recommendation for managing the poultry flock to prevent further human transmission?

Accepted Answer

Treatment of the affected birds with tetracycline antibiotics and implementation of biosecurity measures.

Answer

Culling the entire flock and thorough disinfection of the premises.

Answer

Isolation of symptomatic birds and increased ventilation in the coop.

Answer

Vaccination of the remaining healthy birds with an inactivated *Chlamydia* vaccine.

Question 2

Which of the following zoonotic diseases is primarily transmitted to humans through the consumption of undercooked meat, particularly pork, and can lead to a severe neurological form in humans?

Accepted Answer

Trichinellosis

Answer

Leptospirosis

Answer

Toxoplasmosis

Answer

Brucellosis

Question 3

A veterinarian is called to investigate a sudden increase in abortions and stillbirths in a cattle herd. Several cows also exhibit signs of mastitis and lameness. Serological testing confirms *Brucella abortus* infection. What is the most critical public health concern associated with this diagnosis?

Accepted Answer

Transmission to humans via consumption of unpasteurized dairy products or direct contact with infected tissues.

Answer

Risk of human infection through inhalation of contaminated aerosols.

Answer

Potential for significant economic losses due to reduced milk production.

Answer

The need for immediate quarantine and slaughter of all affected animals.

Question 4

In a rural community, a veterinarian is advising pet owners on preventing zoonotic diseases. Which of the following recommendations is most crucial for preventing the transmission of *Ancylostoma caninum* (canine hookworm) to humans?

Accepted Answer

Prompt removal of pet feces and preventing children from playing in contaminated areas.

Answer

Regular vaccination of dogs against common canine diseases.

Answer

Feeding dogs a commercially prepared, balanced diet.

Answer

Administering monthly heartworm preventives that also target fleas.

Question 5

A veterinarian is working with a large commercial swine farm experiencing an outbreak of a vesicular disease. Samples are sent to a reference lab, and the results confirm Swine Vesicular Disease (SVD). From a public health and regulatory perspective, what is the primary significance of this diagnosis?

Accepted Answer

SVD is indistinguishable clinically from Foot-and-Mouth Disease (FMD) and has significant international trade implications.

Answer

SVD is highly virulent to humans and requires immediate human vaccination protocols.

Answer

SVD is a reportable disease but has no zoonotic potential or economic impact.

Answer

SVD requires depopulation of the entire herd due to its rapid spread and high mortality.

Question 6

Which of the following statements about the control of rabies in domestic animals and wildlife is most accurate from a veterinary public health perspective?

Accepted Answer

Oral rabies vaccination (ORV) programs for wildlife are a key strategy for reducing spillover to domestic animals and humans.

Answer

Routine vaccination of all domestic animals is sufficient to eliminate rabies from an endemic area.

Answer

Rabies surveillance in wildlife is unnecessary if domestic animal vaccination rates are high.

Answer

Post-exposure prophylaxis for humans is only effective if administered within 24 hours of exposure.