Bovine abortion

first 120 days

Trichomonas

first 90 days

Campylobacter

first 150 days

Bovine viral diarrhea virus, or congenital defects

120 - 270+ days

infectious bovine rhinotracheitis

150-270+ days

leptospira

180-270+ days

Salmonella, listeria, pine needle

120-270+ days

mycotic

90 - 270+ days (mid gestation) and cause necrosis of the of the cotyledons, with fetal lesions including myocarditis, hepatitis, myositis and encephalitis.

neospora

first half of gestation

trichomonas, campylobacter, BVD, congenital defects

Second half of gestation

IBR, lepto, salmonella, listeria, mycosis, brucella, pine needle, neospora

Lepto hardjo (few clinical signs, repro problems - zoonotic

incidental strains pomona, icetrohaemorrhagiae

fevere, iceterus, abortion storms, severe sudden drop in milk, intravascular hemolysis - hemoglobinuria - second half of gestationb

acute lepto

Bull persistent infector, cows clear, early embryonic death fertility problems, pyometra, placentitis and pneumonia of the fetus

tritrichomonas foetus , reportable pcr preputial swab

Campylobacter early embryonic death, fertility problems

campy vaccine, pcr preputial swab

Fetal inflammation, placentitis, abortions, retained placenta, metritis and lack of signs in younger animals), last half of pregnancy, pneumonia in the fetus

Brucella abortus

Eradicated from US in domestic cattle, reportable, Rb51 Bangs Vaccine

BVD

Respiratory - most common isolated virus in feedlot resp outbreaks

Repro - early embryonic death/fertility problems

Immunosuppresion

PI calf → mucosal dz

Mucosal disease - noncytopathic form turns into cytopathic form in a persistently infected cow

erosions on tongue, palate, between claws

differentiate from MCF, vesicular stomatitis, FMD, bluetongue, rinderpest

vesicular lesions, corneal edema, high mortality, variable morbidiity, fever

Malignant catarrhal fever - ovine herpes virus 2, sheep up to 3 miles away

supportive care - usually fatal

Cortical blindness (blind with a PLR(, opisthotonus (stargazing)

Polioencephalomalacia - thiamine deficiency

Circling disease, unilateral factial nerve paralysis,

Listeria monocytogenes, - comes from bad sillage

PPG, oxytet,

Thromboembolic meningoencephalitis - pneumonia, arthritis, myocarditiis(papillary muscle necrosis) , fundic vasculitis

Histophilus somni

Mastitis Environmental forms

Coliforms (E. coli, klebsiella(wood chips))(most severe clinical mastitis)(systemic abx, fluids, NSAIDs)- often culture negative from milk

strep uberis, strep dysgalactiae - intramammary abx, culture

eval hygiene/post dip coverage, teat ends, bedding

Mastitis contagious forms

Strep agalactiae (intramammary abx), Staph aureus (cull?), mycoplasma bovis (cull?)

eval milking hygiene pre dip

Extravascular hemolysis, normal urine, icteric with anemia febrile

Anaplasam marginale - erythrocytes

Bovine lymphoma virus

high prevalence, lymphosacroma (low incidence) Heart, uterus, lymph nodes, abomasum or spine

can have non-BLV lymphosarc - cutaneous juvenile thymic

Hypocalcemia, autoausculatory position (listening to own heart), poor temp regulation, 1 day milk,

milk fever

full PE may have toxic mastitis

IV calcium gluconate- slowly (cardiac arrhythmias), and oral calcium

lush pastures (high in potassium low magnesium)- tremors, staggering

grass tetany- hypomagnesemia

periparturient hemoglobinuria - hypophosphatemia

90-90-90 rule lameness

90% lameness in the foot, 90% hind foot, 90% lateral claw

Claw horn disruption lesion - white line, sole ulcer

Foot rot

Fusobacterium necrophorum

Systemic abx - ceftiofur (lactating) beef (tulatrhomycin)

Digital dermatitis

terponema spp

hairy heel warts/strawberry footrot

topical tetracyclines