Search results for “mineral and metal testing”.
During the winter, the Texas A&M Veterinary Medical Diagnostic Laboratory (TVMDL) typically sees submissions in newborn calves described as “weak”, “dummy”, “maladjusted”, and “poor doer”. Most commonly, these animals are born alive but lack normal vigor and die within the first week of life. Postmortem exam and ancillary diagnostic testing has shown vitamin and trace…
A herd of 14, six-month-old crossbred cattle was turned out into a new pasture. Within five days, five head died suddenly. An old barn with various abandoned and discarded metal and equipment was noted to be in the pasture. Chemical poisoning of an unknown origin was suspected. A 500-pound steer was submitted to the Texas…
As part of the process for weaning, a group of 400 calves were given a parenteral injection of a mineral preparation. Four calves were unexpectedly found dead within 24 hours following treatment. Due to marked pulmonary congestion, there was a suspicion of acute pneumonia. Fresh and fixed tissues (liver spleen, lung, and kidney) were submitted…
Analytical Testing Analytical testing capabilities for drug testing have evolved significantly over the years. Historically, techniques such as thin layer chromatography (TLC), gas chromatography (GC) and gas chromatography – mass spectrometry (GC/MS) were used to detect drugs. More modern day tests include enzyme-linked immunosorbent assay (ELISA), high-pressure liquid chromatography (HPLC) and liquid chromatography – mass…
A one-year-old, female-spayed, mix breed dog required a mid-shaft, hind leg amputation after a femoral fracture. Following the amputation, the owner and veterinarian noted marked callus formation with draining tracts on the lateral aspect of the right leg (Figure 1). Radiographs performed almost a month after the amputation demonstrated a marked amount of bony proliferation…
Two hundred and forty straight stocker cattle were on a wheat and grass pasture with access to old barns filled with moldy hay, chemicals, fertilizers, and other substances. Six percent of the animals reportedly died within a 24-hour period. Two 7-month-old calves were necropsied on site and were noted to have melting abdominal fat, hemorrhage…
Approximately 40 head of Hereford cows were grazing on 12 sections of land with oil production activity present. In one particular section, four to five cows were found dead within 12-24 hours. Another cow was observed by the owner to be shaking and trembling, had fallen and gotten up, fell a second time and became…
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In reflecting upon yet another major livestock show season in Texas, it is important to keep in mind the possibility of copper toxicity, particularly in sheep and goats. Sheep are particularly sensitive to excess copper in their diets. Although goats are not as sensitive as sheep, they can still become intoxicated with too much copper. It…
The Texas A&M Veterinary Medical Diagnostic Laboratory’s (TVMDL) analytical chemistry section performed zinc testing on a small set of paired samples. Prior to testing, blood was collected from four clinically healthy animals and divided into two tubes with EDTA. One tube was a standard microtainer tube with a rubber o-ring buried in the groove of…