Cows Flashcards
When are placentomes palpable
75-90 days gestation
When is the fetus palpable
60 days (may be out of reach after 4-7m)
When and where is the uterine artery fremitus evident`
Ipsilateral- 4m; bilateral at 7m
T/F Uterine artery fremitus indicates viable pregnancy
F
When does metritis typically occur
Within 2 weeks of calving
Name the 4 risk factors of metritis
Retained fetal memb, dystocia, stillbirth, twinning
What does brucella abortus cause in the pregnant cow
late gestation abortions, placentitis
T/F Taylorella equigenitalis causes venereal disease in cows
F- only horses
Most common BVD congenital effect
Cerebellar hypoplasia (less: microphthalmia, hydraencephaly)
At what point of McMaster result should calves be de-wormed
300-400 egg count (this is when weight loss happens)
Most common time for displaced abomasum
four weeks post-partum
TPN formula- 15 d calf
1L each of: 10% am acids, 50% gluc, 10% lipid
Prohibited Abx - food animal
chloramphenicol, FQs, vancomycin, most sulfas (except sulfadimethoxine)
What does 7 way vax cover
7 way bacterin vax: Clostridium: chauvoei, septicum, novyi A and B, sordellii and perfringens C & D
What are the big 5 calf D agents
crypto, salmonella, eneterpathic/enterotoxic e. coli, rotavirus, corona virus
US BVD genotypes
1a 1b 2a
Moroccan leather appearance of abomasum- agent
(cobblestone) Ostertagia- larva in glands form nodules, seasonally emerge and cause signs
Tx frothy bloat
Oral poloxalene or cooking oil
Rectangular or triangular eggs in fecal egg count of health cows; agent, lifecycle
Moniezia tapeworm eggs; oribatid mites in soil eaten by host; (usually non pathogenic but can cause intestinal stasis)
Tx rumen acidosis
Magnesium Oxide (becomes MgOH in rumen)
Oat toxicosis effects
renal and GI signs- Tannins damage mucosa; hemorrhagic D and renal tubular necrosis
How does coccidia produce nervous coccidiosis in cattle
Elaboration of heat-labile neurotoxin
Infectious bovine rhinotracheitis- agent, CS
Bovine herpes virus 1- UPPER respiratory signs and white plaques on conjuntiva and nasal epithelium
Tx bovine papillomavirus
Autogenous vaccine from herd
Cause of LSA
BLV (bovine leukemia virus)- lentivirus
Herd test for BLV
ELISA- gp51 Ag
Honking cough, pulmonary edema, emphysema- agent
BRSV- paramyxovirus
BVD congenital disorders
Cerebellar hypoplasia, microphthalmia, hydranencephaly
Timing of PI of BVD
less than 125 days gestation
Three zoonotic parapox viruses
pseudocowpox, contagious ecthyma, bovine papular stomatitis (BPS)
Ddx proliferative teat lesions
pseudocowpox, VS, bluetongue
Small raised lesions in gums/dental pad in calf
BPS (no GI signs, no other oral lesions)
Cause of mucosal dz
BVD conversion from NCP to CP in PI
Lumpy jaw agent, tx
Actinomyces bovis (G+), Na-Iodide (cull)
Woody tongue agent, tx
Actinobacillus ligniersii (G-), Na-Iodide
Painful cough, elicited on laryngeal palpation in calf under 1.5 y
Calf diptheria- fusobacterium necrophorum
Zoonotic salmonella causing watery green diarrhea, tx
Salmonella Typhimurium, ceftiofur