Titanium implants and lateral forces. An experimental study with sheep.

The purpose of this study was to investigate the resistance of titanium implants to horizontal forces in a sheep model. Twenty implants were inserted into the foreheads of 5 sheep, 4 implants on each animal. After a healing period of 3 months, abutments were mounted on the implants.

Pharmacokinetics of single-dose administration of tinidazole in unweaned calves.

In a crossover trial, 7 healthy, 7- to 29-day-old, unweaned Finnish Ayrshire calves were given a single dose of 20 mg of tinidazole/kg of body weight, IV, and a single dose of 25 mg of tinidazole/kg orally. Blood samples were collected serially, and serum concentration of tinidazole was measured by use of high-performance liquid chromatography. Serum concentration vs time data were analyzed by use of the statistical moment theory.

Efficacy of two therapy regimens for treatment of experimentally induced Escherichia coli mastitis in cows.

The objective of the study was to monitor the effect of two therapy regimens on experimental Escherichia coli mastitis. Single udder quarters of 12 cows that were at least 30 d postpartum were inoculated with 1500 cfu of E. coli.

Viability of bovine demi- and quarter-embryos after transfer.

The viability of bovine demi- and quarter-embryos was investigated. Early compacting morulae were nonsurgically flushed from superovulated donor cows and were bisected by two microneedles. One of the halves was then split further into two quarters.

Finnish dairy cows: energy balance and seasonal variation in fertility.

The relationship between metabolic balance and seasonal variations in fertility was studied in middle Finland in 104 cows that had calved from February to June. The cows were kept indoors until the end of May when they turned out to pasture. Urea and acetone concentrations in milk were used to evaluate metabolic balance, and progesterone assays were used to determine the onset of ovarian activity.

Pregnancies from bovine oocytes matured and fertilized in vitro.

Production of transgenic animals and embryo cloning are only a few examples of new biotechnological methods applied to animal embryos. All these techniques require large amounts of oocytes and early embryos. In many laboratory animals, embryos matured and fertilized in vivo are easily obtained, but with larger domestic species it requires laborious surgical procedures and the number of embryos obtained remains relatively small ( 1982).

Whole milk progesterone analysis used for pregnancy diagnosis in beef cattle.

In Finland the routinely used method to determine milk progesterone level is based on whole milk analysis (Progesterone RIA-kit for Veterinary Diagnostic use, Farmos Group ltd.). The method is standardised for milk samples which are taken from the udder just after the cow has been milked.