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Eggshell apex abnormalities associated with Mycoplasma synoviae infection in layers
Eun-Ok Jeon1, Jong-Nyeo Kim, Hae-Rim Lee
1Avian Disease Laboratory, College of Veterinary Medicine, Chungbuk National University, Cheongju 361-763, Korea.
Journal of Veterinary Science
|June 26, 2014
Summary
Mycoplasma synoviae (MS) infection in poultry causes significant eggshell apex abnormalities (EAA), affecting shell strength and ultrastructure. Affected eggs show lasting damage, even if appearing normal externally.
Area of Science:
- Poultry Science
- Animal Pathology
- Veterinary Medicine
Background:
- Eggshell apex abnormalities (EAA) can impact poultry production.
- Mycoplasma synoviae (MS) is a known poultry pathogen.
Observation:
- Eggs with EAA were assessed for shell strength, thickness, and ultrastructure.
- Mycoplasma synoviae (MS) infection was confirmed via serological assays and isolation from the reproductive tract.
- Scanning Electron Microscopy was used to examine shell ultrastructure.
Findings:
- MS infection led to statistically significant changes (p < 0.01) in eggshell quality.
- Ultrastructural alterations were observed in the mammillary knob layer of affected eggs.
- Even eggs that appear structurally intact exhibit sub-optimal quality upon ultrastructural evaluation.
Implications:
- This study is the first to report EAA in Korea.
- MS infection negatively impacts eggshell integrity beyond visible parameters.
- Findings highlight the need for disease control to maintain egg quality.
