ABEM Toxicology, Environmental & Infectious Diseases — Questions and Answers
Question 1: What is the antidote for opioid overdose?
- Atropine
- Naloxone (Correct answer)
- Epinephrine
- Digoxin
Correct answer: Naloxone
Naloxone is a specific opioid antagonist that rapidly reverses the effects of opioid overdose. It works by binding to opioid receptors in the brain, displacing opioids and blocking their effects, particularly respiratory depression. This can quickly restore normal breathing and consciousness in someone experiencing an opioid overdose.
Question 2: What is a symptom of carbon monoxide poisoning?
- Fever
- Headache and confusion (Correct answer)
- Rash
- Cough
Correct answer: Headache and confusion
Carbon monoxide (CO) is a colorless, odorless gas that binds to hemoglobin more readily than oxygen, leading to cellular hypoxia. Common symptoms of CO poisoning, often mistaken for flu, include headache, dizziness, nausea, and confusion. Severe poisoning can lead to loss of consciousness, seizures, and death due to oxygen deprivation to vital organs.
Question 3: How is heat stroke treated?
- Antibiotics
- Cool and hydrate (Correct answer)
- Hot packs
- Steroids
Correct answer: Cool and hydrate
Heat stroke is a severe, life-threatening condition caused by the body overheating, often due to prolonged exposure to high temperatures or physical exertion in the heat. The primary treatment involves rapid cooling of the body, such as with ice packs or cool water immersion, and rehydration to lower core body temperature and restore fluid balance.
Question 4: What is the first action in suspected sepsis?
- Painkillers
- Steroids
- Antibiotics (Correct answer)
- Oxygen only
Correct answer: Antibiotics
Sepsis is a life-threatening condition caused by the body's overwhelming response to an infection, leading to organ dysfunction. Administering broad-spectrum antibiotics as quickly as possible is critical in suspected sepsis to target the underlying infection and prevent its progression. Early antibiotic therapy significantly improves patient outcomes and survival rates.
Question 5: Which lab helps confirm infection?
- Platelets
- WBC count (Correct answer)
- Glucose
- Creatinine
Correct answer: WBC count
A White Blood Cell (WBC) count, also known as a leukocyte count, is a common laboratory test used to help identify and monitor infections. An elevated WBC count (leukocytosis) often indicates that the body's immune system is actively fighting an infection, as it produces more white blood cells to combat pathogens.
Question 6: What condition follows prolonged cold exposure?
- Hyperglycemia
- Hypothermia (Correct answer)
- Dehydration
- Shock
Correct answer: Hypothermia
Hypothermia is a dangerous drop in body temperature, typically below 95°F (35°C), caused by prolonged exposure to cold environments. When the body loses heat faster than it can produce it, vital systems begin to shut down, leading to symptoms like shivering, confusion, and eventually loss of consciousness and cardiac arrest if not treated.
Question 7: What is used for insecticide poisoning?
- Naloxone
- Insulin
- Atropine (Correct answer)
- Lidocaine
Correct answer: Atropine
Organophosphate insecticide poisoning causes overstimulation of the parasympathetic nervous system due to inhibition of acetylcholinesterase. Atropine is the primary antidote, acting as a competitive antagonist at muscarinic acetylcholine receptors. It helps reverse life-threatening symptoms like bradycardia, bronchospasm, and excessive secretions.
Question 8: What PPE is essential in infection control?
- Shoes
- Gloves and mask (Correct answer)
- Cap only
- Thermometer
Correct answer: Gloves and mask
Gloves and masks are essential components of Personal Protective Equipment (PPE) for infection control. Gloves protect healthcare workers from direct contact with blood, body fluids, and contaminated surfaces, while masks prevent the inhalation of airborne pathogens and the spread of respiratory droplets. Together, they form a crucial barrier against transmission.
Question 9: How are airborne diseases prevented?
- Open windows
- N95 and isolation (Correct answer)
- Drink fluids
- Wash hands only
Correct answer: N95 and isolation
Airborne diseases, such as tuberculosis or measles, are spread through tiny particles that remain suspended in the air. Prevention requires specialized measures like placing infected patients in airborne isolation rooms with negative pressure and healthcare workers wearing N95 respirators. These respirators filter out at least 95% of airborne particles, providing superior protection.
ABEM Toxicology, Environmental & Infectious Diseases
What is the antidote for opioid overdose?