NWCO - Nuisance Wildlife Control Operator Zoonotic Diseases and Safety 2 — Questions and Answers
Question 1: Which raccoon-transmitted disease poses the greatest neurological risk to humans, particularly children?
- Leptospirosis
- Baylisascaris procyonis (raccoon roundworm) (Correct answer)
- Giardiasis
- Toxoplasmosis
Correct answer: Baylisascaris procyonis (raccoon roundworm)
Baylisascaris roundworm causes neural larva migrans when eggs from raccoon feces are ingested, with potentially fatal neurological consequences.
Baylisascaris procyonis eggs become infective after 2-4 weeks in the environment and remain viable for years. When ingested by humans, larvae migrate to the brain (neural larva migrans) and eyes (ocular larva migrans) causing permanent damage, blindness, or death. There is no reliable treatment once larvae reach the brain. NWCO operators must treat raccoon latrines as biohazardous.
Question 2: What is the recommended protocol for an NWCO operator who receives a bat bite?
- Clean the wound and monitor for a month
- Immediately wash the wound, capture the bat for testing, and seek medical attention for PEP evaluation within hours (Correct answer)
- Apply antibiotic ointment and continue
- Wait for the next doctor's appointment
Correct answer: Immediately wash the wound, capture the bat for testing, and seek medical attention for PEP evaluation within hours
Any bat bite requires immediate wound washing, bat preservation for testing, and urgent medical evaluation because rabies is nearly 100% fatal once symptomatic.
Immediate steps: wash wound with soap and water for 5 minutes (reduces risk up to 90%), capture the bat if safe, seek emergency medical evaluation within hours. PEP consists of rabies immunoglobulin plus four vaccine doses over 14 days. PEP is virtually 100% effective before symptoms but waiting for symptoms is fatal.
Question 3: What PPE configuration is required for cleaning large bat guano accumulations?
- Regular gloves and dust mask
- Full-face P100 respirator, Tyvek suit, rubber boots, and chemical-resistant gloves (Correct answer)
- Only safety glasses
- N95 respirator only
Correct answer: Full-face P100 respirator, Tyvek suit, rubber boots, and chemical-resistant gloves
Large-scale guano removal requires maximum protection due to Histoplasma capsulatum spores causing severe respiratory illness.
Required PPE: full-face P100 respirator (not just N95), disposable Tyvek coveralls, chemical-resistant gloves, rubber boots or boot covers, plus decontamination procedures. Guano should be misted with water before disturbing. Large-scale removal may need negative air pressure and HEPA air scrubbing.
Question 4: What is the primary route of hantavirus transmission from rodents to humans?
- Direct bite
- Inhalation of aerosolized virus from dried rodent urine, feces, or nesting material (Correct answer)
- Contact with infected blood
- Ingestion of contaminated food
Correct answer: Inhalation of aerosolized virus from dried rodent urine, feces, or nesting material
Hantavirus is primarily transmitted through inhaling aerosolized particles when dried rodent excreta is disturbed.
Hantavirus Pulmonary Syndrome is primarily transmitted via aerosolized virus from dried deer mouse excreta. Activities like sweeping or moving stored items create highest risk. HPS has a 38% fatality rate with no specific treatment. Prevention: wet materials with 10% bleach before disturbing, wear P100 respirators, ventilate spaces before entry, never dry-sweep.
Question 5: Which common nuisance species is MOST resistant to rabies?
- Raccoon
- Skunk
- Virginia opossum (Correct answer)
- Fox
Correct answer: Virginia opossum
Virginia opossums are notably resistant to rabies, likely due to their lower body temperature.
Opossums' lower body temperature (94-97 degrees F vs 101 degrees F in placental mammals) creates suboptimal conditions for rabies virus. Rabies in opossums is extremely rare. Raccoons, skunks, foxes, and bats are all major rabies reservoirs. Normal precautions should still be used with opossums.
Question 6: What is the correct procedure for disposing of a rabies-positive carcass?
- Bury in the client's backyard
- Double-bag in leak-proof bags, label as biohazardous, and dispose per state health department guidelines (Correct answer)
- Leave for scavengers
- Incinerate on-site without containment
Correct answer: Double-bag in leak-proof bags, label as biohazardous, and dispose per state health department guidelines
Rabies-positive carcasses require double-containment, proper labeling, and approved disposal methods.
Double-bag in heavy-duty leak-proof bags, label as biohazardous, and follow state health department guidelines (typically incineration at approved facility, deep burial with lime away from water, or licensed biomedical waste facility). Decontaminate all equipment with 10% bleach solution. Document disposal method.
NWCO - Nuisance Wildlife Control Operator Zoonotic Diseases and Safety 2
Which raccoon-transmitted disease poses the greatest neurological risk to humans, particularly children?