Comparative pathomorphological, bacteriological and serological examination of broiler breeders and pheasants experimentally infected with<i>Ornithobacterium rhinotracheale</i>
Bibliographic record
Abstract
The aim of the investigations was to determine the influence of Ornithobacterium rhinotracheale (ORT) on the development of pathomorphological lesions in the respiratory organs and on the health status of experimentally infected broiler breeders and pheasants from the rearing stage. There was no evidence of clinical signs in infected broiler breeder hens nor in the group of infected pheasants except for one bird in the latter group which exhibited slower movement and gasping. The frequency and intensity of pathomorphological lesions were higher in pheasants. The gross pathology findings were characterized mainly by redness of the mucosa of the upper respiratory tract and accumulation of mucous content in the nasal cavities, infraorbital sinuses, larynx and trachea. Histopathology confirmed the presence of inflammation of the upper respiratory tract. Lesions in the lungs included hyperaemia, granulomatous and fibrinous pneumonia. ORT was reisolated only from the group of infected pheasants. Reisolation was successful from the respiratory organs (trachea, larynx, infraorbital sinuses, and lungs) of eight out of 10 infected birds. The serological response in both species was characterized by rapid production of specific antibodies that reached a maximum level in the blood in the first week after experimental infection. The antibody titres decreased gradually and were maintained at a stable level until the 12th week after inoculation. Fourteen weeks post-inoculation specific antibodies could not be detected by enzyme-linked immunosorbent assay.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".