Immature T cell neoplasms in three young Holstein cattle with neoplastic involvement of the thymus are described. Case 1, with a precursor T lymphoblastic leukemia (calf form of leukosis), was an 86-day-old female calf. The leukemia was characterized by replacement of the bone marrow and spleen by leukemia cells, but preservation of epithelial frameworks throughout the thymus. The other two neo...

A 4-week-old female Holstein Friesian calf presented with hindlimb paresis. Neurologic examination of spinal reflexes revealed depressed or absent reflexes of the hindlimbs. Menace responses on both sides disappeared on examination of cranial nerves. The calf was finally diagnosed with Neospora caninum infection by pathological findings including nonsuppurative inflammation associated with cyst...

A Holstein calf was born with a large protruding right eye and a central corneal opacity. Enucleation was the first choice of treatment. The calf had a good prognosis and was raised for milking purposes. Macroscopically, the enucleated eye was characterized by the protruded cornea, adherence of the iris to the central posterior cornea and aphakia. Microscopically, central corneal thickening and...

The objective of this study was to assess effects prior social contact on the expression personality traits in group-housed calves. Holstein heifer and bull calves were housed either individual pens (n = 16), or pairs 8 pairs) at birth before they mingled between treatments moved group approximately 2 wk life (8 calves/pen). During 4 life, tested a series standardized behavioral tests: an open ...

a 40-day-old male holstein breed calf with a complaint of inability of moving the tongue in and out aswell as difficulties with breastfeeding was referred to the veterinary clinic. a notch in the middle of thetongue tip was evident during oral examination. in addition, a thin tissue band between the ventral surface of the tongue and floor of the oral cavity was seen in the calf. a diagnosis of ...

background: the immunity and health of newborn calf are related to immunoglobulins uptake from colostrum where treatment of colostrum may improve the uptake. objectives: the purpose of this study was to investigate the effect of controlled heat-treating of colostrum and antibiotic addition on immunoglobulins absorption, performance and health parameters of calf. methods: the colostrum pool was ...

To evaluate the impact of zilpaterol hydrochloride (ZH) on carcass cutability and tenderness of calf-fed Holstein steers, calf-fed Holstein carcasses (n = 102) were selected from a pool of 2,300 steers that were fed 0 or 8.3 mg/kg (DM basis) of ZH. Zilpaterol hydrochloride was supplemented the last 20 d of the finishing period and withdrawn for 3 d before slaughter. Carcasses were selected base...

BACKGROUND Diarrhea because of Salmonella infection is a cause of neonatal calf diarrhea. The stimulation of passive immunity in the calf by vaccinating the dam for Salmonella has shown some success in previous studies; however, there are no data on the use of currently licensed vaccines in the United States. OBJECTIVE To determine whether vaccinating cows at dry-off with a commercially avail...

Conventional dairy farming practices usually involve early separation of calves from their dams. Cow-calf contact (CCC) systems may offer an alternative rearing solution that allows for the expression natural behaviours, such as suckling and bonding. However, literature exploring effects CCC on lying behaviours lactating cows is limited. Thus, aims this study were to assess: (1) with without ac...