Zoonotic Diseases and Safety Flashcards

A NWCO is bitten by a skunk that immediately flees. The bite breaks the skin, but is not bleeding heavily. What is the most critical and immediate action the NWCO must take for their personal safety?

Answer: Vigorously wash the wound with soap and water for several minutes and seek immediate medical consultation regarding post-exposure prophylaxis (PEP).

Rabies is a fatal viral disease transmitted through the saliva of infected animals, including skunks. The first and most critical step after a potential exposure is to thoroughly cleanse the wound to help remove the virus. This must be followed by immediate medical consultation to determine the need for post-exposure prophylaxis (PEP), which is nearly 100% effective at preventing rabies if administered promptly.

Hantavirus Pulmonary Syndrome (HPS) is a severe respiratory disease primarily associated with certain rodent species. What is the most common way humans become infected?

Answer: Inhaling aerosolized viral particles from dried rodent urine, droppings, or saliva.

The primary route of transmission for Hantavirus is through the inhalation of airborne particles. When the urine, droppings, or saliva of infected rodents (like the deer mouse) dry, the virus can become aerosolized during activities like sweeping or cleaning in enclosed, rodent-infested spaces.

A NWCO is preparing to clean a large, dry accumulation of pigeon droppings from a building's attic. Inhaling fungal spores from this material can cause which of the following respiratory illnesses?

Answer: Histoplasmosis

Histoplasmosis is an infection caused by breathing in the spores of the fungus *Histoplasma capsulatum*. This fungus thrives in soil and material enriched with bird or bat droppings. Disturbing these accumulations, especially in enclosed areas, can release a large number of spores into the air.

While working in a crawlspace with a known raccoon latrine, which piece of Personal Protective Equipment (PPE) is most essential for preventing a potentially severe neurologic disease caused by *Baylisascaris procyonis*?

Answer: An N95-rated or better respirator.

*Baylisascaris procyonis*, or raccoon roundworm, produces microscopic eggs in raccoon feces that are extremely durable. The primary risk to humans is the accidental ingestion or inhalation of these eggs. During cleanup, eggs can easily become airborne. An N95-rated respirator is crucial to prevent inhaling these infectious eggs.

A NWCO is working in a wet, marshy area and has a small, open cut on their hand. This environment is frequented by raccoons, muskrats, and rats. Contact with water contaminated by the urine of these animals could lead to which bacterial disease?

Answer: Leptospirosis

Leptospirosis is a bacterial disease spread through the urine of infected animals, which can contaminate water and soil. The bacteria can enter the body through cuts in the skin or through mucous membranes (eyes, nose, mouth). NWCOs working in wet environments are at an increased risk.

When decontaminating a solid, non-porous surface (like a concrete patio) where a raccoon latrine was located, which method is most effective for destroying the highly resistant eggs of *Baylisascaris procyonis*?

Answer: Using a propane torch or boiling water to apply extreme heat.

The eggs of *Baylisascaris procyonis* are extremely resistant to common chemical disinfectants, including bleach and ammonia. The most effective way to kill the eggs on a surface that can withstand it is through the application of extreme heat, such as from a propane torch or boiling water.