TOXICOLOGY PQS EXAM QUESTIONS
AND ANSWERS GRADED A+ 2025/2026
T/F: Yellow staining of the skin and mucous membrane is the symptom of nitrophenol toxicosis.
- ANS true
In fluoride poisoning, what symptom is observed in chronic cases but not in acute?
A: osteomalacia
B: convulsion
C: vomiting
D: diarrhea - ANS osteomalacia
Pairing: It causes severe hypoglycaemia in dogs. - ANS xylitol
Pairing: Fomepizole is the antidote of this poisoning. - ANS ethylene-glycol
Pairing: It causes severe hypoglycaemia in cats. - ANS neither ethylene-glycol nor xylitol
Pairing: It causes severe metabolic acidosis. - ANS ethylene-glycol
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,Pairing: Clinical signs of garlic poisoning. - ANS vomiting, abdominal pain, anaemia, dark
urine, hypotension, tachycardia
Pairing: Clinical signs of dark chocolate poisoning. - ANS restlessness, excitation,
hyperthermia, arrhythmia, convulsions, coma
Pairing: Clinical signs of pomace poisoning. - ANS diarrhea, emesis, oliguria, acute kidney
injury
Pairing: Clinical signs of xylitol poisoning. - ANS depression, lethargy, collapse, convulsions,
icterus, coagulation disorders, hypoglycaemia
Pairing: Clinical signs of raw yeast dough. - ANS bloating, sedation, ataxia, gastric torsion
Pairing: Clinical signs of salted pretzel poisoning. - ANS tremor, hyperthermia, ataxia,
behavior change
T/F: The affinity of carbon monoxide for hemoglobin is 250 times lower than that of oxygen. -
ANS false
T/F: Pralidoxime will be effective in treating pyrethroid poisoning when given within 24 hours of
poisoning. - ANS false
T/F: Drug poisoning: In case of overdose of diazepam the antidote is atipamezole. - ANS false
T/F: Venom is a type of zootoxin that is injected into another animal via a specialized apparatus.
- ANS true
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,T/F: The leading sign of overdose of NSAIDs can be melaena and haematemesis. - ANS true
T/F: Nitrophenol derivatives can cause methaemoglobinaemia in ruminants. - ANS true
T/F: In case of warfarin, to induce symptomatic anticoagulant effect as a bait, consecutive,
multiple uptake occasions are needed. - ANS true
T/F: Organophosphates are well absorbed not only orally but also through the skin. -
ANS true
T/F: Most toxic compounds can be absorbed from the skin. - ANS false
T/F: Bromadiolone is a 2nd generation anticoagulant rodenticide. - ANS true
Which poison is characterized by the fact that it becomes toxic due to the decomposing effect of
bacterial enzymes in the gastrointestinal tract?
A: all three
B: urea
C: ammonium phosphate
D: ammonium chloride - ANS urea
Pairing: Toxic compound of lily of the valley. - ANS convallatoxin
Pairing: Toxic compound of yew. - ANS taxin
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, Pairing: Toxic compound of angel's trumpet. - ANS atropine
Pairing: Toxic compound of monkshood. - ANS aconitine
Pairing: Toxic compound of autumn crocus. - ANS colchicine
Pairing: Toxic compound of spurge species. - ANS phorbol esters
T/F: In case of severe ethylene-glycol toxicosis, ethanol and fomepizole can be used in
combination for treatment. - ANS false
T/F: A Thompsett test is suitable for detecting paraquat and diquat. - ANS true
Pairing: The caused mycotoxicosis has different clinical forms. e.g. gangrenous-cutaneous,
nervous, and hyperthermic - ANS ergopeptides, ergolide alkaloids
Pairing: The caused mycotoxicosis is seldomly lethal, atropine may eliminate its clinical signs. -
ANS slaframine
Pairing: Horses and pigs are significantly more susceptible to this mycotoxin poisoning than
ruminant species. - ANS fumonisin
Pairing: The deeopxy metabolite of this mycotoxin is formed in the liver and is less toxic than
the parent compound. - ANS deoxynivalenol / DON
Pairing: This mycotoxin can be characterized with excessive plasma albumin binding, and in pigs
the elimination half-life is app. 150 hours. - ANS ochratoxin
4 @COPYRIGHT 2026 ALLRIGHTS RESERVED.
AND ANSWERS GRADED A+ 2025/2026
T/F: Yellow staining of the skin and mucous membrane is the symptom of nitrophenol toxicosis.
- ANS true
In fluoride poisoning, what symptom is observed in chronic cases but not in acute?
A: osteomalacia
B: convulsion
C: vomiting
D: diarrhea - ANS osteomalacia
Pairing: It causes severe hypoglycaemia in dogs. - ANS xylitol
Pairing: Fomepizole is the antidote of this poisoning. - ANS ethylene-glycol
Pairing: It causes severe hypoglycaemia in cats. - ANS neither ethylene-glycol nor xylitol
Pairing: It causes severe metabolic acidosis. - ANS ethylene-glycol
1 @COPYRIGHT 2026 ALLRIGHTS RESERVED.
,Pairing: Clinical signs of garlic poisoning. - ANS vomiting, abdominal pain, anaemia, dark
urine, hypotension, tachycardia
Pairing: Clinical signs of dark chocolate poisoning. - ANS restlessness, excitation,
hyperthermia, arrhythmia, convulsions, coma
Pairing: Clinical signs of pomace poisoning. - ANS diarrhea, emesis, oliguria, acute kidney
injury
Pairing: Clinical signs of xylitol poisoning. - ANS depression, lethargy, collapse, convulsions,
icterus, coagulation disorders, hypoglycaemia
Pairing: Clinical signs of raw yeast dough. - ANS bloating, sedation, ataxia, gastric torsion
Pairing: Clinical signs of salted pretzel poisoning. - ANS tremor, hyperthermia, ataxia,
behavior change
T/F: The affinity of carbon monoxide for hemoglobin is 250 times lower than that of oxygen. -
ANS false
T/F: Pralidoxime will be effective in treating pyrethroid poisoning when given within 24 hours of
poisoning. - ANS false
T/F: Drug poisoning: In case of overdose of diazepam the antidote is atipamezole. - ANS false
T/F: Venom is a type of zootoxin that is injected into another animal via a specialized apparatus.
- ANS true
2 @COPYRIGHT 2026 ALLRIGHTS RESERVED.
,T/F: The leading sign of overdose of NSAIDs can be melaena and haematemesis. - ANS true
T/F: Nitrophenol derivatives can cause methaemoglobinaemia in ruminants. - ANS true
T/F: In case of warfarin, to induce symptomatic anticoagulant effect as a bait, consecutive,
multiple uptake occasions are needed. - ANS true
T/F: Organophosphates are well absorbed not only orally but also through the skin. -
ANS true
T/F: Most toxic compounds can be absorbed from the skin. - ANS false
T/F: Bromadiolone is a 2nd generation anticoagulant rodenticide. - ANS true
Which poison is characterized by the fact that it becomes toxic due to the decomposing effect of
bacterial enzymes in the gastrointestinal tract?
A: all three
B: urea
C: ammonium phosphate
D: ammonium chloride - ANS urea
Pairing: Toxic compound of lily of the valley. - ANS convallatoxin
Pairing: Toxic compound of yew. - ANS taxin
3 @COPYRIGHT 2026 ALLRIGHTS RESERVED.
, Pairing: Toxic compound of angel's trumpet. - ANS atropine
Pairing: Toxic compound of monkshood. - ANS aconitine
Pairing: Toxic compound of autumn crocus. - ANS colchicine
Pairing: Toxic compound of spurge species. - ANS phorbol esters
T/F: In case of severe ethylene-glycol toxicosis, ethanol and fomepizole can be used in
combination for treatment. - ANS false
T/F: A Thompsett test is suitable for detecting paraquat and diquat. - ANS true
Pairing: The caused mycotoxicosis has different clinical forms. e.g. gangrenous-cutaneous,
nervous, and hyperthermic - ANS ergopeptides, ergolide alkaloids
Pairing: The caused mycotoxicosis is seldomly lethal, atropine may eliminate its clinical signs. -
ANS slaframine
Pairing: Horses and pigs are significantly more susceptible to this mycotoxin poisoning than
ruminant species. - ANS fumonisin
Pairing: The deeopxy metabolite of this mycotoxin is formed in the liver and is less toxic than
the parent compound. - ANS deoxynivalenol / DON
Pairing: This mycotoxin can be characterized with excessive plasma albumin binding, and in pigs
the elimination half-life is app. 150 hours. - ANS ochratoxin
4 @COPYRIGHT 2026 ALLRIGHTS RESERVED.
