Beef Cow Diseases

Curing the diarrhea is not the point Antibiotics does not help Correct dehydration, electrolyte imbalance, and blood pH Dehydration 6-8% and nursing– use commercial rehydration 2-6/day Dehydration >6 and not nursing– IV fluids

0 normal 1 semi formed or pasty 2 loose with consistency, remains on bedding 3 watery feces, run through bedding material B blood is present

Calving- use clean surface Provide good nutrition in late pregnancy Full cows with bad udders and tests ID problem and vaccinate cows in late pregnancy

Beef- ensure adequate colostrum intake and isolate sick ones Dairy- colostrum is very important, house in clean area, provide good milk replacer, isolate sick ones

Occurs 2-4weeks following significant stress (weaning, processing) 1/3 calves affected and about 10% die Recovered calves preform poorly

Age and immunity of calf Anatomy of bovine respiratory system

Ventilation and humidity Overcrowding Stressors (hauling, injury, fatigue, anxiety, processing Dehydration and hunger Nutrition deficiencies

Pathogenicity and number of organisms Viruses: ibr bvd brsv Bacteria: mh, pm, hs

Pestivirus (RNA virus) 2 bio types: cytopathic or non cytopathic Abortion, respiratory, or GI signs Persistently infected calf (PI) Cow infected day 30-125 gestation Immunotolerant, sheds virus for life Mucosal disease BRD Immunosuppression 2degree bacterial pneumonia

Mild respiratory disease

Mild to sub clinical infections Sets the stage for BRD

Affects young beef and dairy cattle

Dictyocaulus Viviparus Bronchitis and chronic pneumonia 2 degree bacterial infection

Stressed calves build less immunity A virus infection reduces lungs ability to clear bacteria Bacteria normally found in nose, get into lungs, and body’s response is pneumonia

Sudden death High fever, depression, appetite Arched back, diarrhea, stiffness Rapid breathing, abnormal lung sounds, cough, runny nose Isolation

History (stressful event) Clinical signs (lung sounds), response to treatment Culture and sensitivity Necropsy

Antibiotics NSAIDS support (TLC) Antihistamines, vitamins, procal

Delayed treatment Improper dose, frequency, duration Mixing antibiotics, using unapproved drugs Development of antibiotic resistance

Ventilated area Adequate colostrum Vaccinations

Arrivals in feedlot Isolation of new calves Fill water and feed trough first Vaccinate At weaning- prevent stress

But fails to absorb dietary water Gut secretes water back into the guy