J Vet Sci.  2014 Dec;15(4):579-582. 10.4142/jvs.2014.15.4.579.

Eggshell apex abnormalities associated with Mycoplasma synoviae infection in layers

Affiliations
  • 1Avian Disease Laboratory, College of Veterinary Medicine, Chungbuk National University, Cheongju 361-763, Korea. moip@cbu.ac.kr
  • 2Aviagen, Huntsville, AL 35805, USA.

Abstract

Eggs exhibiting eggshell apex abnormalities (EAA) were evaluated for changes in shell characteristics such as strength, thickness, and ultrastructure. Mycoplasma synoviae (MS) infection was confirmed by serological assay along with isolation of MS from the trachea and oviduct. Changes in eggshell quality were shown to be statistically significant (p < 0.01). We also identified ultrastructural changes in the mammillary knob layer by Scanning Electron Microscopy. While eggs may seem to be structurally sound, ultrastructural evaluation showed that affected eggs do not regain their former quality. In our knowledge, this is the first report describing the occurrence of EAA in Korea.

Keyword

eggshell abnormalities; eggshell ultrastructure; Mycoplamsa synoviae; scanning electron microscopy
Full Text Links
  • JVS
Share
  • Twitter
  • Facebook
Copyright © 2020 by Korean Association of Medical Journal Editors. All rights reserved.     E-mail: koreamed@kamje.or.kr