Exam II Flashcards
Organic synthetic herbicides: source
ingestion of concentrates or sprays, grazing/access to freshly sprayed pastures/lawns
Organic synthetic herbicides: toxicity
cattle, dogs most susceptible. Dogs more sensitive, LD50 100 mg/kg
Organic synthetic herbicides: clinical signs
Non specific GI and NM. High doses= rapid onset
Organic synthetic herbicides: diagnosis
Chemical analysis $$$. Elevated ALP, LDH, CPK. Hx important.
Organic synthetic herbicides: treatment
No specific antidote. Wash skin, activated charcoal. Supportive and symptomatic
Paraquat and diquat: source
Ingestion of concentrates, malicious poisoning
Paraquat and diquat: toxicity
LD50 25-75 mg/kg in cats, dogs, pigs, sheep, humans.
Paraquat and diquat: clinical signs
Acute: vomiting, anorexia, depression. High doses= ataxia, dyspnea, seizures. Delayed= respiratory signs
Paraquat and diquat: diagnosis
Lesions in respiratory tract, lingual ulcers. Liver, kidney spleen enlarged. Chem analysis of plant, stomach contents, urine. Mild rad changes in lungs. History.
paraquat and diquat: treatment
No specific antidote. Detox: emetics, activated charcoal, saline catchertics. Supportive tratment- fluid therapy, dialysis. Antioxidants
paraquat and diquat: prognosis
Guarded to grave, especially if treatment begins >24 hours post-exposure
Pentachlorophenol (fungicide): source
treated wood, contaminated feed/water
Pentachlorophenol (fungicide): toxicity
LD 50 100-200 mg/kg in domestic animals. Chronic 40-70 mg/kg
Pentachlorophenol (fungicide): clinical signs
Irritation of eye, respiratory, GI mucosa, intact skin. Neurotoxic effects, high exposure- CNS stimulation/seizures. Acute- hyperthermia, tachycadia, dyspnea, cyanosis, death. Chronic- weight loss decreased milk, anemia, fetal malformation/abortion
Pentachlorophenol (fungicide): diagnosis
Lesions: rapid rigor mortis, irritation of skin/mucous membranes, pulmonary congestion, degenerate liver, kidney, brain, dark blood.
Chem analysis of blood, urine, kidney, skin.
Clinical signs: rapid overheating, respiratory distress.
Pentachlorophenol (fungicide): treatment
No specific antidote. Remove from site of exposure. Detox: emetics, gastric lavage w/ 5% NaCO3, activated charcoal, soap and water. Supportive: oxygen therapy, lower bosy temp, IV fluids, prevent 2ndry infection.
Pentachlorophenol (fungicide): prognosis
If survive initial 24 hrs, fair chance of recovery
Non-protein nitrogen: source
Urea as feed additive, contamination by urea fertilizer, ammonium salt and ammoniated feed products
Non-protein nitrogen:toxicity
Ruminants most susceptible, horses also. Urea is most toxic. Non-adapted toxic dose 0.45 g/kg. Lethal dose in adapted animals 1-1.5 g/kg.
Non-protein nitrogen: clinical signs
Increase in blood ammonia, lactate, glucose, BUN, systemic acidosis. Death due to cardiac or respiratory failure. Restlessness, aggression, muscle tremors, salivtion, teeth grinding, colic, bloat, rumen stasis, convulsion, death.
Non-protein nitrogen: diagnosis
Lesions due to vascular damage, congestion and degeneration in liver and kidneys. Ammonia odor.
Lab: anaysis of feed for urea content, ammonia in whole blood, rumen fluid, vitreous fluid.
Non-protein nitrogen: treatment
Relieve bloat. Vinegar to cattle, sheep, goats, followed by cold water. Repeat every 4-5 hr for 48 hrs. Normal saline for dehydration, NaCO3 IV for acidosis, rumenotomy
Ionophore: source
anticoccidial, growth promoter, eating feeds with higher than recommended levels, malicious poisoning in horses
Ionophore: toxicity
all animals susceptible, equine most sensitive, cattle intermediate, poultry are least.
Ionophore: clinical signs
Horses: rapid onset, anorexia, sweating, colic, depression, incoordination, hyperventilation, tachycadia, tachyarrythmias, prostration and death. Cattle: anorexia, diarrhea, depression, labored breathing, ataxia, prostration, death. Poultry: anorexia, diarrhea, ataxia, odd posture, decreased egg production. Dogs: ataxia, muscle weakeness, respiratory paralysis, dysuria, constipation, depression
Ionophore: diagnosis
Lesions: cardiac muscle in horses, skeletal muscle in sheep, swine, dogs, both in cattle and poultry. Chem analysis of feed, GI contents, liver. Elevated liver enzymes, decreased serum Ca and K, increased PCV
Ionophore: treatment
No specific antidote, remove medicated feed, activated charcoal, mineral oil, saline cathartics. IV fluid and e-lytes, K+, monitor cardiac function, reduce stress
Ionophore:prognosis
Survive can lead to myocardial scarring and necrosis, horses may not reach previous performance
Water deprivation/sodium ion: source
In feed, drinking water, excess sodium and water deprivation
Water deprivation/sodium ion: toxicity
Acute dose 2.2 g/kg in horses, cattle and swine. 6 g/kg in sheep. 4 g/kg in dogs. Can tolerate 10% w/ free access to water. Pigs, poultry, cattle most susceptible. Dogs are less susceptible.
Water deprivation/sodium ion: clinical signs
Constipation and thirst, vomiting, polyuria, metabolic acidosis. Intermittent convulsive seizures. Circuling, pivoting, head-pressing, blindness, deafness, inability to eat or drink. Poultry- depession, ascites and collapse.
Water deprivation/sodium ion: diagnosis
Lesions: gastric congestion, inflammation with pinpoint ulcers. Fluid in body cavities, edema in organs and brain. Eosinophilic meningoencephalitis in pigs. Serum and CSF [Na+], 2000 ppm [Na+] in brain
Water deprivation/sodium ion: treatment
Small amounts of fresh water gradually over 2-3 days. IV fluid and furosemide in small animals, anticonvulsants in small animals
Water deprivation/sodium ion: prognosis
Poor. 50% mortality
Inorganic arsenic: source
ant and roach bait, wood preservative, pesticides, contaminated pastures
Inorganic arsenic: toxicity
Lethal oral dose 1-25 mg/kg in most species. Chronic toxicosis not documented
Inorganic arsenic: clinical signs
Peracute: sudden death, colic. Acute: rapid onset, severe colic, staggering, salivation, vomiting, thirst, watery diarrhea (+/- hemorrhagic, hematuria), death in 1-3 days. Subacute: colic, anorexia, depression, diarrhea, dehydration, partial paralysis of hind limbs, death in several days.
Inorganic arsenic: diagnosis
Lesions: GI mucosal edema and hemorrhage with sloughing and perforation, liver and kidney damage, capilary degeneration, skin exposure- skin lesions and blistering. Chem analysis: Urine antemortem, liver and kidney postmortem. More than 7-10 ppm in liver/kidney is strong indication. Increased PCV and BUN
Inorganic arsenic: treatment
Fluids, e-lytes, transfusion, treat acidosis, prevent 2ndry infection and stress. Decon: gastric lavage (early), mineral oil and activated acharcoal, no emetics/cathartics, demulcents to coat GI mucosa. Chelation- BAL not 100% effective, may increase tox, follow dosing carefuly. Chemet less effective but safer than BAL
Inorganic arsenic: prognosis
Grave if not treated early
Organic arsesnic: source
feed additives
Organic arsesnic: toxicity
organic less toxic than inorganic, 500 ppm Arsanilic acid for 7-10 days toxic in swine, 250 ppm Roxarsone for 7-10 day toxic in swine.
Organic arsesnic: clinical signs
Arsanilic acid: acute onset, 3-5 days. Incoordination, ataxia, partial paralysis, blindness, erythema, sensitivity to sunlight. In poultry, anorexia, depression, coma, death. Roxarsone: swine- sudden onset, marked hyperexcitability, tremors, collapse, coma, death, no blindness. Poultry: incoordination and ataxia.
Organic arsesnic: diagnosis
Lesions: swine- erythema, muscle atrophy (chronic), nerve degeneration, demyelination, gliosis. Chem analysis of suspected feed, liver, kidney.
Organic arsesnic: treatment
No specific antidote, withdrawal of organic arsenicals, supportive therapy- fluids, vitamins, antibiotics (2ndry infection)
Copper: source
Acute: ingestion of high concentrations of copper. Chronic in sheep: excess copper in feed/soil or molybdenum deficiency
Copper: toxicity
Accumulation in liver when molybdenum is less than 1-2 ppm or sulfate unavilable, liver damage, stress
Copper: clinical signs
Acute: rapid onset of severe GI signs due to corrosive action. Chronic: sudden onset of weakness, anorexia, pale mucous membranes, icterus, hemoglobinuria, fever, dyspnea and shock
Copper: diagnosis
acute: clinical signs Chronic: lesions- icterus, hemolysis, methemoglobinemia, liver enlarged, yellow and friable, kidneys enlarged, hemorrhagic, bluish, friable. Chem analysis: elevated Cu in serum/whole blood, liver, kidney. Elevated liver enzymes.
Copper: treatment
acute treatment: supportive and symptomatic therapy. Chronic: ammonium tetrathiomolybate, D-penicillamine, sheep rations contain Cu/Mo 6:1