Eimeria meleagrimitis, E. adenoeides, and E. dispersa: severity of infection and changes in the intestinal mucosa of the turkey
| Autor: | P.A. Madden, Patricia C. Augustine, M.D. Ruff |
|---|---|
| Rok vydání: | 1981 |
| Předmět: |
Pathology
medicine.medical_specialty Turkeys Malabsorption Brush border Immunology Biology Eimeria Microbiology Jejunum chemistry.chemical_compound Intestinal mucosa Intestine Small medicine Animals Intestinal Mucosa Poultry Diseases Methionine Coccidiosis Longitudinal muscle General Medicine medicine.disease biology.organism_classification Infectious Diseases medicine.anatomical_structure chemistry Intestinal Absorption Duodenum Parasitology |
| Zdroj: | Experimental parasitology. 51(1) |
| ISSN: | 0014-4894 |
| Popis: | Glucose and methionine were malabsorbed in some intestinal regions of turkeys infected with Eimeria meleagrimitis, E. adenoeides , or E. dispersa . The decrease in absorption was not always related to the numbers of parasites in the cells or the extent of damage to the mucosa. With E. adenoeides , malabsorption was found in the jejunum even though parasites were not present. Conversely, with E. dispersa , no malabsorption was observed in the duodenum even though light microscopy showed numerous parasites. In many intestinal regions, damage to the mucosal surface visible with scanning electron microscopy (SEM) was slight or absent, although malabsorption was marked. No changes were noted with SEM in the structure and orientation of the brush border in these regions. Villar height was significantly reduced in the regions of heaviest infection when intestinal damage was visible. Conversely, the crypts of Lieberkuhn were often two or three times as deep in infected poults as in uninfected poults. In general, no differences were found in the thickness of the circular and longitudinal muscle layers between the infected and uninfected poults. The dry weight of the intestinal tissue was less from infected poults than from uninoculated controls and was related to both region of the intestine and severity of the infection. |
| Databáze: | OpenAIRE |
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