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Comparative pathology of chickens experimentally inoculated with avian influenza viruses of low and high pathogenicity.
TLDR
The pattern of organ involvement and viral antigen distribution in chickens intratracheally inoculated with HP AIV isolates indicates a common capability to spread beyond the respiratory tract and confirms the pantrophic replicative, pathobiologic, and lethal nature of the viruses.
Molecular Characterization of Mycoplasma gallisepticum Isolates from Turkeys
TLDR
Although five isolates from several turkey flocks at different locations in the United States that were clinically affected with respiratory disease had patterns similar to the 6/85 vaccine strain, it was not possible to prove that they originated from the vaccine strain—it is possible that they could be naturally occurring field isolates.
Malabsorption syndrome in broiler chickens.
TLDR
Signs and lesions similar to those seen in chickens with the field syndrome were reproduced when these isolates were inoculated into day-old chicks with low levels of maternal antibody against viral arthritis.
Calcium and phosphorus requirements of the very young turkey as determined by response surface analysis.
The first experiment was a central composite rotatable design with calculated calcium levels of 6.2, 7.0, 9.0, 11.0, and 11.8 g/kg diet and total phosphorus levels of 5.2, 6.0, 8.0, 10.0, and 10.8
Histomorphometric bone properties of sexually immature and mature White Leghorn hens with evaluation of fluorochrome injection on egg production traits.
TLDR
Results indicated that the development of osteopenia in hens with the onset and progression of lay may be related to increased resorptive surface of bone and loss of structural and nonstructural bone.
Focal failures of endochondral ossification in the broiler.
TLDR
Two types of cartilaginous lesions were observed in a flock of 400 broilers separated into four groups and fed diets containing different energy and NH4Cl contents, similar to osteochondrosis as described in mammals.
Influence of time off feed on broiler viscera weight, diameter, and shear.
TLDR
Liver color measurements indicated that longer feed withdrawal periods resulted in significant linear decreases in L* (lightness), +a* (redness), and +b* (yellowness), which would lower the potential for cutting the intestine during automated evisceration.
Experimental rickets in broilers: gross, microscopic, and radiographic lesions. III. Vitamin D deficiency.
TLDR
Results demonstrated that dietary calcium deficiency produced rachitic lesions, that the lesions were very different from those of phosphorus deficiency or calcium excess, and that the patients' lesions were variable over time.
Experimental rickets in broilers: gross, microscopic, and radiographic lesions. I. Phosphorus deficiency and calcium excess.
TLDR
Day-old broiler chicks were fed diets high in calcium or low in phosphorus for 30 days and lesions were similar; however, folding fractures were common and cartilage columns of the metaphysis were thinned and replaced with increased woven bone.
Experimental rickets in broilers: gross, microscopic, and radiographic lesions. II. Calcium deficiency.
TLDR
Results demonstrated that dietary calcium deficiency produced rachitic lesions, that the lesions were very different from those of phosphorus deficiency or calcium excess, and that the patients' lesions were variable over time.
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