VMP 420: BEEF VERIFIED STUDY GUIDE
Direct Clinical Signs of parasite - Answers - Diarrhea, Anemia, Sunken Flank, Rough
Coat, Bottle Neck, Death
Indirect Clinical Signs - Answers - Suboptimal performance (lower milk, no calf, less
beef)
higher susceptibility to disease
poor repro performance (delayed breeding/repro)
Indirect parasite cow/calf - Answers - lose 0.46 lb/day; 69 lb/150 d grazing
indirect parasite feedlot - Answers - lose $1.23 - $6.39/100 lb
indirect parasite dairy - Answers - lose 300 lb/lactation; 2.7 lb/day
parasite pattern for northern states - Answers - -optimal temp b/w 40 and 85 F
-one transmission season in summer, drops off in late fall and winter b/c too cold
parasite pattern for southern state - Answers - two seasons
1. prior season parasite: remains in spring and drops of later spring & early summer
2. new season: fall & winter
Break in late spring and summer due to dry & hot weather
Large Stomach Worm - Answers - Haemonchus (sheep)
brown stomach worm - Answers - major problem w/ cattle
Ostertagia ostertagi
-affects gastric gland of abomasum
-exhibits arrested dvlpt.
-diarrhea, decrease gut retention time (not digesting protein), hyperactive gut ...
intestinal worms - Answers - cooperia, nematodirus, bunostonum, oesohagostonum,
trichuris (whipworm)
lungworm in cattle - Answers - Dictiocaulus viviparus
3 classes of dewormers - Answers - 1. benzimidazoles
2. Macrocylic Lactones
3. Imidazothiazole
Benzimidazoles - Answers - white dewormer
larvae & adults
, less effective w/ larvae
moderate w/ arrested dvlpt larvae
Macrocylic lactones - Answers - avermectins/milbemycin
-adult & larvae
less effective w/ Cooperia & Nematodirus
long-acting
Imidazothiazole and hydropyrimidines (I/T dewormers) - Answers - levamisole &
morantel
levamisole - Answers - not effective w/ arrested dvlpt larvae
short-acting
toxic at high dose
morantel - Answers - safe
can use w/ lactating animals
feed pre/mix
Parasite prevention/control - Answers - 1. use at high-transmission
2. use in high risk animals
3. use one pdt until prove no longer works
4. base treatment on data
5. drugs not only component
Liver Fluke - Answers - trematodes, problem in NW and far S
indirect life cycle via mud snail
liver fluke treatment/control - Answers - clorsulon (ivomec plus)
albendazole
keep away from wet areas
coccidia - Answers - normally found in the animal
damage lining of SI (protozoa)
coccidia prevention - Answers - good sanitation
proper stocking
prevent w/ feed or water additives (bovatec, rumensin, deccox and corid)
ionophores (bovatec & rumensin) fatal to equine
dictyocalus viviparus - Answers - only lungwarm in cattle
scours, rapid weight loss, verminous pneumonia
Parasite control - Answers - reduce burden to min clinical signs and losses
min pasture contamination
good health & nutrition
Direct Clinical Signs of parasite - Answers - Diarrhea, Anemia, Sunken Flank, Rough
Coat, Bottle Neck, Death
Indirect Clinical Signs - Answers - Suboptimal performance (lower milk, no calf, less
beef)
higher susceptibility to disease
poor repro performance (delayed breeding/repro)
Indirect parasite cow/calf - Answers - lose 0.46 lb/day; 69 lb/150 d grazing
indirect parasite feedlot - Answers - lose $1.23 - $6.39/100 lb
indirect parasite dairy - Answers - lose 300 lb/lactation; 2.7 lb/day
parasite pattern for northern states - Answers - -optimal temp b/w 40 and 85 F
-one transmission season in summer, drops off in late fall and winter b/c too cold
parasite pattern for southern state - Answers - two seasons
1. prior season parasite: remains in spring and drops of later spring & early summer
2. new season: fall & winter
Break in late spring and summer due to dry & hot weather
Large Stomach Worm - Answers - Haemonchus (sheep)
brown stomach worm - Answers - major problem w/ cattle
Ostertagia ostertagi
-affects gastric gland of abomasum
-exhibits arrested dvlpt.
-diarrhea, decrease gut retention time (not digesting protein), hyperactive gut ...
intestinal worms - Answers - cooperia, nematodirus, bunostonum, oesohagostonum,
trichuris (whipworm)
lungworm in cattle - Answers - Dictiocaulus viviparus
3 classes of dewormers - Answers - 1. benzimidazoles
2. Macrocylic Lactones
3. Imidazothiazole
Benzimidazoles - Answers - white dewormer
larvae & adults
, less effective w/ larvae
moderate w/ arrested dvlpt larvae
Macrocylic lactones - Answers - avermectins/milbemycin
-adult & larvae
less effective w/ Cooperia & Nematodirus
long-acting
Imidazothiazole and hydropyrimidines (I/T dewormers) - Answers - levamisole &
morantel
levamisole - Answers - not effective w/ arrested dvlpt larvae
short-acting
toxic at high dose
morantel - Answers - safe
can use w/ lactating animals
feed pre/mix
Parasite prevention/control - Answers - 1. use at high-transmission
2. use in high risk animals
3. use one pdt until prove no longer works
4. base treatment on data
5. drugs not only component
Liver Fluke - Answers - trematodes, problem in NW and far S
indirect life cycle via mud snail
liver fluke treatment/control - Answers - clorsulon (ivomec plus)
albendazole
keep away from wet areas
coccidia - Answers - normally found in the animal
damage lining of SI (protozoa)
coccidia prevention - Answers - good sanitation
proper stocking
prevent w/ feed or water additives (bovatec, rumensin, deccox and corid)
ionophores (bovatec & rumensin) fatal to equine
dictyocalus viviparus - Answers - only lungwarm in cattle
scours, rapid weight loss, verminous pneumonia
Parasite control - Answers - reduce burden to min clinical signs and losses
min pasture contamination
good health & nutrition
