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Published on: February 20, 2015
Histomorphometry and macroscopic intestinal lesions in broilers infected with Eimeria acervulina.
R C L Assis1, F D Luns, M E Beletti
1Federal University of Uberlandia - Institute of Biomedical Sciences - Laboratory of Parasitology, Av. Pará, 1720 - Umuarama Campus, Minas Gerais, Brazil.
Veterinary Parasitology
|January 19, 2010
Summary
Eimeria acervulina infection in broilers reduces intestinal villi length and absorptive area, impacting growth. Litter management and Diclazuril treatment mitigate these coccidiosis effects.
Area of Science:
- Poultry Science
- Veterinary Parasitology
- Avian Pathology
Background:
- Coccidiosis, caused by Eimeria species, is a significant parasitic disease in broiler chickens.
- Eimeria acervulina infection specifically targets the duodenum, leading to intestinal damage and impaired nutrient absorption.
- Understanding the impact of E. acervulina on intestinal morphology is crucial for effective disease management.
Purpose of the Study:
- To quantify the effects of Eimeria acervulina infection on broiler intestinal villi length and absorptive area.
- To evaluate the efficacy of different control strategies against E. acervulina-induced coccidiosis.
- To correlate macroscopic and microscopic intestinal lesions with broiler performance.
Main Methods:
- Experimental infection of broiler chickens with Eimeria acervulina oocysts via oral inoculation and contaminated litter.
- Histological examination of duodenal segments using H&E staining and image analysis software to measure villi morphology.
- Assessment of intestinal absorptive area and classification of macroscopic lesions using standard scoring systems.
- Application of treatments including litter management (fermentation) and Diclazuril administration.
Main Results:
- Eimeria acervulina infection significantly reduced intestinal villi height and overall absorptive area in broilers.
- A positive correlation was observed between macroscopic and microscopic intestinal lesion scores.
- Litter fermentation and Diclazuril treatment effectively reduced the severity of intestinal lesions caused by E. acervulina.
Conclusions:
- Eimeria acervulina infection detrimentally affects broiler intestinal integrity and absorptive capacity, leading to reduced growth.
- Preventive measures such as proper litter management and anticoccidial drugs like Diclazuril are vital for controlling E. acervulina.
- These interventions can reduce oocyst virulence or viability, thereby mitigating disease impact in broiler flocks.
