Agricultural Poisons (OP & Organochlorines) MCQ Quiz | Clinical Toxicology

1. The primary mechanism of toxicity in organophosphate (OP) poisoning is the inhibition of which enzyme?

2. Which of the following is a classic muscarinic sign of organophosphate poisoning (DUMBELS mnemonic)?

3. Muscle fasciculations and subsequent paralysis in OP poisoning are due to the overstimulation of which receptors?

4. What is the mechanism of action of Atropine in the management of organophosphate poisoning?

5. Pralidoxime (PAM) is administered in OP poisoning to achieve which of the following?

6. The phenomenon of “aging” in OP poisoning refers to:

7. Which of the following is a characteristic feature of Organochlorine (e.g., DDT, Endosulfan) poisoning?

8. The primary diagnostic test to confirm organophosphate poisoning is:

9. The most common cause of death in acute, severe organophosphate poisoning is:

10. Intermediate syndrome in OP poisoning typically occurs 24-96 hours after exposure and is characterized by:

11. Organophosphate-Induced Delayed Polyneuropathy (OPIDP) is caused by the inhibition of which enzyme?

12. What is the primary management strategy for a patient with organochlorine-induced seizures?

13. A farm worker presents with a garlic-like or kerosene-like odor on his breath and clothes. This is highly suggestive of exposure to which class of pesticides?

14. Which statement is TRUE regarding the use of oximes (e.g., Pralidoxime) in pesticide poisoning?

15. The endpoint of atropinization in a patient with OP poisoning is guided by which clinical sign?

16. Organochlorines are known for their environmental persistence and bioaccumulation primarily because they are:

17. Which of these is NOT a typical feature of the central nervous system (CNS) effects of acute OP poisoning?

18. The primary mechanism of toxicity for organochlorines like DDT involves interference with:

19. Atropine is effective against muscarinic signs but has no effect on which of the following manifestations of OP poisoning?

20. In contrast to organophosphates, poisoning with which of the following results in a readily reversible inhibition of acetylcholinesterase, making oxime therapy generally unnecessary?

21. The first and most crucial step in managing a patient with dermal exposure to an agricultural poison is:

22. Which of the following is considered a specific antidote for organochlorine poisoning?

23. A patient with severe OP poisoning develops tachycardia. This is most likely due to:

24. The enzyme acetylcholinesterase, which is inhibited by organophosphates, belongs to which class of enzymes?

25. A patient is brought to the emergency department with suspected insecticide poisoning. Which clinical finding would most strongly differentiate organochlorine from organophosphate poisoning?