Exam 2 - Ruminant Respiratory Toxins Flashcards
what are the clinical signs associated with perilla ketone toxicity?
acute death, dyspnea, wheezing, frothing at the mouth, expiratory grunt
what diagnostics are used for perilla ketone toxicity?
history, evidence of exposure - could be in the hay
what is the treatment for perilla ketone toxicity?
none
how is perilla ketone toxicity prevented?
provide other forage so they don’t eat
what months are there higher toxicities of perilla ketone?
august to october
what effects are seen with pyrrolizidine alkaloids? common offenders?
hepatotoxic effects before pneumotoxins
common offenders - crotalaria, trichoderma, & senecio
what toxic gases are most common toxic exposures for cows?
ammonia, hydrogen sulfate, CO2, & methane
T/F: toxic gases can occur at low-level chronic exposure or acute severe outbreaks
true
what is another name for hypersensitivity pneumonias?
extrinsic allergic alveolitis
what is the etiology of extrinsic allergic alveolitis?
allergic respiratory disease due to inhalation of organic dusts
what animals are typically affected by extrinsic allergic alveolitis?
adult dairy cows - more so than beef
confined animals
what are the clinical signs of extrinsic allergic alveolitis?
fever, anorexia, dullness, hypogalactia, tachypnea, dyspnea, coughing, crackles
what diagnostics are used for extrinsic allergic alveolitis?
serum antibodies - only show exposure
what is the treatment for extrinsic allergic alveolitis?
remove offending agent & corticosteroids
how is extrinsic allergic alveolitis prevented?
make silage instead of moldy hay or feed outside
what is the etiology of fibrosing alveolitis? what does it cause?
unknown - possibly chronic extrinsic allergic alveolitis
chronic pneumonia
what is the etiology of bronchiolitis obliterans? what does it cause?
unknown - chronic respiratory disease in yearly/young adult cows
chronic pneumonia
what clinical signs are seen with bronchiolitis obliterans?
deep infrequent cough, tachypnea, hyperpnea, exaggerated expiratory effort
T/F: parasitic pneumonia is rare in cattle
true
what animals are affected by lungworms?
dictyocaulus viviparus - young animals
what are the clinical signs associated with lung worms?
respiratory signs
how are lung worms diagnosed?
larvae in feces
baermann test
how are lung worms diagnosed?
larvae in feces
baermann test
how are lung worms prevented?
anthelmintics
what is the most common respiratory parasite in sheep & goats? how is it prevented?
muellerius capillaris
avoid overly wet pastures
what happens if there is a large infestation of ascaris suum? how is it treated?
may cause pneumonia
corticosteroids, antibiotics, oxyfenbendazole
what parasite migrates through the lungs with little impact on pulmonary function?
toxocara vitulorum
what agent causes ovine progressive pneumonia?
maedi visna - non-oncogenic exogenous retrovirus, lentivirus
what animals are affected by ovine progressive pneumonia?
adult sheep
what are the clinical signs associated with ovine progressive pneumonia?
chronic pneumonia, mastitis, emaciation, tachypnea, flared nostrils, open mouth breathing, head/neck extended, can show CNS signs
what diagnostics are used for ovine progressive pneumonia?
presumptive based on history and CS, serology (false positive common), virus detection (not commonly utilized)