Toxicology and Poisonous Plants Flashcards
Chocolate contains theobromine and caffeine which are both classified as
methylxanthines
Resulting signs of methylxanthines
hyperactivity, tachycardia, tachypnea, trembling and potentially death
The more __ the chocolate the more toxic it is
bitter
LD 50 of Chocolate
100-200 mg/kg
Clinical signs of Alliums (Onions, Garlic, Shallots, Leeks, Chives)
hemolytic anemia, hemoglobinuria, V+, weakness, pallor
Clinical signs for rising/yeast bread dough are associated with
ethanol toxicosis and foreign body obstruction; severe abdominal pain, bloat, V+, incoordination, depression
Grapes and raisins may cause
acute kidney injury in dogs
LD 50 for Tobacco products
20-100mg
Death from ingesting tobacco products is due to
respiratory paralysis
Clinical signs of xylitol
Dogs: hypoglycemia (w/in 30min. of ingestion) secondary to the release of insulin; liver failure and coagulopathy
Why is xylitol toxic to dogs?
it is quickly absorbed into the bloodstream resulting in a potent release of insulin from the pancreas
Tx for ingestion of an acid
DILUTION
Alkali cause __ lesions than acidic compounds
Deeper
Detergents may be
nonionic, anionic, cationic
Anionic detergent
low toxicity, usually limited to cutaneous, ocular, oral, GI irritation
Cationic detergents
Rapidly absorbed and may produce sever local and systemic toxicities. Cats may get oral ulcerations and stomatitis
First aid tx to ingestion of corrosive agents
DO NOT INDUCE VOMITING! oral dilution w/ milk or water
One _ can cause zinc poisoning in a dog
penny
Clinical signs for ingestion of zinc
PU/PD, hemoglobinuria, diarrhea, weight loss, anemia, V+, GI ulcers
First step of tx for zinc ingestion
Remove zinc from GI tract via sx or endoscopy. Activated charcoal is not effective
Pathology of lead
combines with RBC and makes them fragile resulting in anemia and capillary damage
When is veterinary tx of ingesting mothballs required?
Always
Pathology of mothballs
Heinz-body anemia, hemolysis, methemoglobinemia, affects liver, RBC, CNS
What is methemoglobin?
A type of hemoglobin that carries oxygen through the blood but doesn’t release it to the cells
Marijuana is toxic to
Dogs, cats, and horses
Clinical signs of marijuana ingestion
prolonged depression, V+, incoordination, sleepiness, hyper salivation, dilated pupils, low bp, low temp., seizure, coma
Tx for ingestion of marijuana
Induce vomiting if ingested in last 30 minutes, activated charcoal, supportive care
Members of Rhododendron app. (azalea) contain substances known as grayantoxins which lead to
cardiovascular dysfunction
Severe azalea poisoning could ultimately lead to
coma and death from cardiovascular collapse
Ricin is one of the most _ plant toxins known, _ are most potent
potent; seeds
Lillies are highly toxic to
cats (severe kidney damage)
Ingestion of one or two Sago Palm seeds can result in
V+,D+, depression, seizures, and liver failure
Pathology of Calcium-Oxalate-Containing plants
Calcium oxalate crystals expelled in the mouth upon chewing, resulting in oropharyngeal edema
Clinical signs of ingestion of Calcium-Oxalate-Containing plants
oral irritation, burning of lips, mouth, tongue, drooling, V+, difficulty swallowing
Ingestion of ____ from fallen branches causes lysis of the RBC with the subsequent development of hemolytic anemia
wilted or partially dried maple leaves
the native red maple is a potent killer of
horses and ponies
Horses often die within _ hours of ingestion of wilted maple leaves
18-24
_ _ is the most common result of bracken fern poisoning
Enzootic hematuria
Bracken ferns primarily affect
Cattle, and less frequently sheep
Poisoning of bracken fern most often occurs during ____
late summer when other feed is scarce, or when animals are fed hay containing bracken fern; requires prolonged exposure
Clinical signs of Enzootic hematuria
affected cattle are weak, rapidly lose weight, and develop pyrexia (106-110F)
Most animals respond to __ for tx of bracken staggers
thiamine therapy
SLUDGE stands for:
Salivation, Lacrimation, Urination, Defecation, GI cramping, Emesis
Fly bait clinical signs
SLUDGE
Many systemic Insecticides contain
Disulfoton, an organophosphate
Antidote for systemic insecticides
Atropine and 2-PAM
Snail or slug baits usually contain
Metaldehyde
Clinical signs of ingestion of snail or slug bait
tachycardia, nervousness, panting, drooling, incoordination, hyperthermia, tremors, seizure
Gopher or mole bait may contain zinc phosphide, which is converted to _ _ in the stomach
phosphine gas
Released phosphine gas results in
severe respiratory distress
Death occurs from gopher/mole bait because of
respiratory failure
3 main types of rat/mouse bait
- anticoagulants
2.bromethalin
3.Cholechalciferol
Anticoagulants include:
Short acting and long acting
What do anticoagulant rodenticides do to the body
halts the recycling of Vitamin K resulting in blood clotting abnormalities and can result in spontaneous hemorrhage
Rait bait-Bromethalin clinical signs
Muscle tremors, seizures, hyper excitability, ataxia, CNS depression, loss of vocalization, paresis, paralysis, and death
Minimum duration of Vitamin K therapy for Wafarin
14 days
Minimum duration of Vitamin K therapy for Bromadiolone
21 days
Minimum duration of Vitamin K therapy for Brodifacoum and others
30 days
Rat bait types of anticoagulants
Warfarin, Bromadiolone, Brodifacoum
Cholecalciferol causes
kidney failure, CVS abnormalities, tissue mineralization
Antifreeze prodcuts
Methanol, Propylene Glycol, Ethylene Glycol
Methanol is most commonly found in
windshield washer fluids
Small exposure vs Large exposure of methanol
Sm: only mild GI upset
L: supportive care for metabolic acidosis
Main ingredient in the safer antifreeze forms and 3x less toxic than ethylene glycol
Propylene Glycol
Most dangerous form of antifreeze
Ethylene Glycol
Toxic metabolites of EG cause
severe metabolic acidosis and renal tubular epithelial damage
Other than bloodwork, ethylene glycol can be examined in the
urine
Preferred method of tx for ethylene Glycol but is not effective in cats
Fomepizole
Other tx for Ethylene Glycol can be used in dogs and cats
Ethanol
Human NSAIDS toxic to animals
Acetaminophen, Aspirin, Ibuprofen
One extra strength (500mg) tablet ingest by a cat can result in
toxicosis
Acetaminophen is rapidly and almost completely
absorbed from the GI tract
No dose of acetaminophen is safe in cats since they are deficient in
glucuronyl transferase
There are acceptable daily dosages of __ in dogs and cats
Aspirin
Clinical signs of overdoses
depression, V+, GI ulceration, increased bleeding times, hematemesis, anorexia, tachypnea, and more
__ may be used therapeutically but can cause gastric ulcers and is generally not recommended
Ibuprofen
Clinical signs of Ibuprofen
GI ulcerations, perforations, hemorrhage of GI tract