Ag 1 Flashcards
Illness scripts have 3 components. Name them
Presenting clinical signs (ps) Pathophysiologic insult (pi) Predisposing factors (pf)
What
How
Why
What are the key features of diagnosing recumbent in cows
Mental status
Muscle function (skeletal, smooth, cardiac)
Limb position and form
Systemic disease signs
Downer cow syndrome refers to all of the following except
A. A cow that is recumbent <24 hours
B. Pressure induced damage to muscles and nerves of hind limbs
C.elevated CK
D. Poor prognosis for recovery
A
Greater than 24 hours
Duration of __________ and quality of ___________ care establish a prognosis for a down cow getting up
Recumbency
Nursing
Metabolic disorders of supply and demand that can result in recumbancy are all of the following except A. Hypercalcemia B. Hypomagnesemia C.acute hypophosphatemia D. Hypokalemia D. Excessive negative energy balance
A. Hypo
What range is usually considered subclinical hypocalcemia?
A. 8.1-8.6
B. 8-8.5
C. 7.4-7.9
B
Impaired smooth muscle function Increased risk of retained placenta Metreitis Displaced abomasum Intramammary infection
Which of the following does not decribe stage 2 clinical hypomagnesmia?
A. CNS Depression B. Decreased smooth muscle function C. Decreased cardiac function D. Short lasting ataxia while standing E. Decreased thermoregulation
D- this is stage 1
The rest are stage 2 in sternal recumbancy
T/F Decreased fertility is a possible impact of hypocalcemia
True
T/ F. The uterine discharge from a cow should be watery (serous)
False. Should be thick (mucoid)
Watery is suggestive of metritis along with red color and foul smell
T/F. Nerve and muscle cells have a decreased cell membrane potential due to open Na channels. This makes them closer to threshold potential thus resulting in a more excitable tetany state
True. But this is more seen in cats dogs horses and humans
At the neuromuscular junction a decreased acetylcholine release due to hypocalcemia results in a ________ strength of muscle contraction.
Decreased
Cow sheep goats
A blunted PTH response due to hypocalcemia occurs more often in (older/younger) cows when there is impaired PTH receptor binding
Older
Which of the following doesn’t predispose a cow from becoming hypocalcemic
A. Growing bones B. Impaired PTH receptor binding C. Fewer 1,25 vitamin d receptors D. Few osteoclasts E. Being a jersey cow F. High potassium forage (>1.5-2%)
A
Which of the following may occur following the treatment of hypocalcemia?
A. Acute hypophophatemia
B. Chronic hypophosphatemia
C. Acute hyperphosphatemia
D. Chronic hyerphosphatemia
A
Bilateral flex ion of hind fetlocks (creeper cow) occurs in what mineral abnormality
Acute hypophosphatemia
They are alert
PTH secretion during hypocalcemia increases renal and salivary excretion of P
When can you leave after a cow is treated with parenteral calcium IV
Not until cow is up (20 minutes)
But don’t give 2nd bottle
T/F. Stage 1 hypocalcemia is usually treated with oral calcemia not IV
True. Don’t give iv if standing
T/F. A second bottle of Ca isn’t given because it is no help to the cow but is not dangerous for the cow
False. Increases relapse
Oral calcemia after standing will reduce relapse risk
To prevent hypocalcemia we feed a (low/ high) DCAD ration pre-partum. Feed (more/less) Ca in pre partum ration.
Low
Less
Acute hypophosphatemia requires a treatment of (phosphite/ phosphate)
Phosphate
Given via an enema or oral mono sodium phosphate. IV not effective b/c phosphite is used
Which of the following is not a presenting sign of hypomagnesemia
A. Death B. Hyperesthesia C. Tetany D. Tachypnea/ Dyspnea E. Tachycardia with quiet heart sounds F. Hypermotile rumen with diarrhea G. Convulsions
E- tachycardia with LOUD heart sounds
Hypomagnesemia clinical signs occur because of the reduced________ ________ activity at neuromuscular junction and neural synapses
Acetylcholine esterase
Name some predisposing factors for hypomagnesemia
Adults (rumenoreticulum is only site if absorption) Rapidly growing cool season grasses Low quality forage Stressors in environment Pregnancy or lactating
Mg in bone is not available to cow
Ration tetany ratio (K/Ca+Mg) over 2.2 increases risk of
Hypomagnesmia
T/F clinical signs in sheep and goats include hyperesthesia and tetany rather than flaccid paralysis that occur in dairy cattle
True
T/F it takes up to 2 hours for clinical improvement of hypomagnesmia
True. Can leave before these cases get up
What is the target Mg ration?
A. 1%
B. 0.5%
C. 0.2%
D. 0.05%
C
Alfalfa
Trace minerals
Mg sulfate in water are all good ways to get this #
Which of the following would be alert on presentation?
A. Severe coli form mastitis
B. Calving paralysis
C. Muscoskeletal injury
D. Uterine rupture and sepsis
B C
T/F- calving paralysis tends to be asymmetrical
True tibial fibers of dorsal roots of sciatic
A golden calf can be a sign of what
A stressful parturition that may lead to calvingparalysis
Spinal lymph i sarcoma due to BLV progresses over several days to weeks. Describe that progression
Ataxia> paresis> paralysis of hind limb symmetrically, distended bladder and loss of tail tone
Heart Uterus Lymph nodes Abomasum Spinal cord
AMDUCA allows ELDU when there is a valid
VCPR- veterinary client patient relationship
Fluoroquinolones such as baytril cannot be used unless it is used to treat
Respiratory dz
T/F. All effective penicillin use is extra label
True
Treatment of systemically severe disease such as mastitis, metritis and massive sepsis includes all of the following except
A. Hypertonic saline plus 5-10 gallons of water via a stomach tube
B. Flunixin meglumine IM
C. Systemic Antibiotics including ceftiofur (G-)
B. IV. IM- longer withdrawal
Ligamentous and muscle injuries are treated with
Excellent nursing care
Rest
Anti inflammatory
T/F dexamethasone can be used in cows with calving paralysis
True
A progressive paralysis over 2-3 days that ascends from hind limbs and eventually results in recumbency and respiratory distress describes what disease
Tick paralysis
American dog- d. Variabilis
Rocky Mountain wood- d. Andersoni
Other than removing ticks how is Tick P. Treated
Avermectin anthelminthic
Pyrethrin insecticide spray
T/F Most animals won’t experience a negative energy balance around parturition
False. All experience at least some
Changing a pre-partial cow from forage to concentrates is a preventative treatment for ENEB. What happens if too much concentrate is given?
Rumen acidosis and metabolic acidosis eventually
When does NEB start to occur in a cow
Pre petunia as feed intake decreases closer to partition
Insulin (production/ resistance) is a normal physiological response peripartum
Resistance
Glucose goes to milk
Resistance allows decreased skeletal muscle and adipose tissue uptake
Increased liplysis for more nefa to muscle
What are some tests done to diagnose ENEB?
Look for kerosine
BHB (blood beta hydroxybuterate)
Ketostix- urine acetoacetate
Too much fat getting mobilised (NEFA released) depresses appetite and can cause what other disease (besides ENEB)
Hepatic lipidosis
A cow with a BHB > 1.2 with no clinical signs is considered
Subclinical ketosis
Nervous ketosis is described as having abnormal behaviors such as constant licking, head pressing and wandering; it is associated with (hyper/ hypoglycaemia)
Hypo
Tx- iv 50% dextrose
Overconditioned cows are at a greater risk for ____ and thus severe hepatic lipidosis
ENEB
Treated with glucose to reduce lipolysis
Dexamethasone given ONCE with dextrose
Fatty liver is suspected when ketosis doesn’t respond to treatment and when there is a prolonged
ENEB. Excessive NEFA cannot be processed and is stored as triglycerides
Propylene glycol is given as an additive to a cows feed if there is adequate rumen motility in a cow with ketosis
T\F
False. Must be given as a bolus. Rest is true
Is fermented in rumen = propionate
Also toxic to rumen MO so no more than 1 L a day
T/F. Insulin should be given in ENEB
False. No proof
Name some presenting signs of pregnancy toxemia
Progressive anorexia= ketouria
Progressive weakness
Progressive cortical signs such as blindness head pressure coma death
T/ F. You check for urine ketones or BHB not glucose when determining extent of pregnancy toxemia
True
> 2.5/3
Magic oral energy supplementation is given to animals with (early/late) signs of PT
Early
T/F most lameness is due to disease of the foot
True. 80-90%
What are some infectious disease that cause lameness involving the feet
Foot rot (pododermititis) Hairy heel warts (digital dermatitis)
Name some non-infectious diseases of the foot causing lameness
Sole hemorrhage
Sole/toe ulcer
White line disease
Footrot is predominately in (front/hind) feet and is usually (unilateral/bilateral). The swelling is (symmetrical/ asymmetrical) and interdigital
Hind
Unilateral
Symmetrical
What are some bacteria commonly associated with footrot
Fusobacterium necrophorum
Dichelobacter nodosus
Bacteroides malaninogenicus
Footrot is treated with antibiotics that cover (gram -/ gram+)
Gram -
Oxytetracycline
Ceftiofur
Sulfadimethoxine
Penicillin
To prevent footrot what mineral should be supplemented
Zinc
Chelated is more bioavailable
T/F Hairy heel warts usually involve no swelling above the coronet
True
What is the primary pathogen of HHW
Treponema spp.
But polymicrobial into macerated skin
HHW occurs more often in (young/ old) cows and more often in cows with (open/closed) interdigital cleft space
Young
Open