Larry A. Horstman

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Mature Charolais x Angus rotational cross cows were adjusted to moderate body condition by d 190 of gestation then randomly blocked to a maintenance (ME) or low-energy (LE) diet. At parturition, the 128 cows were randomly allotted within prepartum (PRP) diet to a high-energy (HE) or LE diet. At d 30 postpartum (PP), cows were randomly blocked to two(More)
Spring-calving Angus cows (n = 24) in moderate body condition were assigned to either a high (H), maintenance-high (MH) to support superior milk, maintenance-low (ML) to support average milk, or low (L) energy diet at 12 d (SD = 4) postpartum. Energy balance for individual cows was determined by body condition change, weight change, and weigh-suckle-weigh(More)
In Experiment 1, 12 ovariectomized heifers were assigned to receive weekly hormone treatments in a replicated 6 x 6 Latin square design. Hormonal treatments were given as two simultaneous injections i.m. and consisted of: 1) 2 ml propylene glycol and 2 ml propylene glycol; 2) .5 mg estradiol benzoate and 2 ml propylene glycol; 3) .5 mg estradiol benzoate(More)
A 1-week-old calf was treated for fractured right metatarsus; however, at 3.5 months of age, the fracture site again became unstable. Radiography disclosed segmental transverse metatarsal fractures with an isolated, full-circumference diaphyseal sequestrum. Arteriography and nuclear scintigraphy confirmed the isolation and necrosis of the diaphyseal(More)
BACKGROUND Immune thrombocytopenic purpura (ITP) is frequently associated with chronic hepatitis C (HpC-ITP). METHODS Recombinant interleukin-11 (rIL-11), which has both thrombopoietic and anti-inflammatory properties, was evaluated in 12 patients with HpC-ITP in this pilot study. Group 1 (7 patients) was treated at high dose (50 microg/kg daily) while(More)
The association between feed intake and lipogenic activity in adipose tissue was investigated in growing cattle. Twenty-five 300-kg steers were allotted by BW to one of five levels of intake of a single high-energy corn-corn silage-based diet. Steers were adapted to diets over 4 wk and intakes were adjusted weekly to achieve steady but varying rates of(More)
Three experiments were conducted with ovariectomized (OVX) cows and heifers to investigate potential neuroendocrine mechanisms controlling estrous behavior. In Exp. 1, 10 OVX cows were treated with either 125 micrograms estradiol benzoate and 10 cc saline (125 micrograms EB + SAL), 125 micrograms EB and 500 micrograms gonadotropin releasing hormone (125(More)
Effects of inhibiting prolactin secretion and of calf removal at 3 d postpartum on the lipogenic capacity of s.c. adipose tissue were investigated in postpartum beef cows. The rate of fatty acid synthesis (SYN) from [1-14C]acetate and the activity of fatty acid synthetase (FAS) were assessed on adipose tissue obtained by biopsy at 1, 2, 4, 8 and 10 wk(More)
Two experiments were conducted with estradiol-treated ovariectomized cows and heifers to determine if cortisol and dexamethasone inhibit estrous behavior. In Experiment 1, eight ovariectomized Holstein cows were subjected to weekly hormonal treatments in a replicated 4 X 4 Latin square. Treatments consisted of 500 micrograms estradiol benzoate and either 0,(More)