thumbnail

Microbial infections are associated with embryo mortality in Arctic-nesting geese.

Applied and Environmental Microbiology

By:
, , , , and
https://doi.org/10.1128/AEM.00706-15

Links

Abstract

To address the role of bacterial infection in hatching failure of wild geese, we monitored embryo development in a breeding population of Greater white-fronted geese (Anser albifrons) on the Arctic Coastal Plain of Alaska. During 2013, we observed mortality of normally developing embryos and collected 36 addled eggs for analysis. We also collected 17 infertile eggs for comparison. Using standard culture methods and gene sequencing to identify bacteria within collected eggs, we identified a potentially novel species of Neisseria in 33 eggs, Macrococcus caseolyticus in 6 eggs, and Streptococcus uberis and Rothia nasimurium in 4 eggs each. We detected seven other bacterial species at lower frequencies. Sequences of the 16S rRNA genes from the Neisseria isolates most closely matched sequences from N. animaloris and N. canis (96 to 97% identity), but phylogenetic analysis suggested substantial genetic differentiation between egg isolates and known Neisseria species. Although definitive sources of the bacteria remain unknown, we detected Neisseria DNA from swabs of eggshells, nest contents, and cloacae of nesting females. To assess the pathogenicity of bacteria identified in contents of addled eggs, we inoculated isolates of NeisseriaMacrococcusStreptococcus, and Rothia at various concentrations into developing chicken eggs. Seven-day mortality rates varied from 70 to 100%, depending on the bacterial species and inoculation dose. Our results suggest that bacterial infections are a source of embryo mortality in wild geese in the Arctic.    

Study Area

Additional publication details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Microbial infections are associated with embryo mortality in Arctic-nesting geese.
Series title:
Applied and Environmental Microbiology
DOI:
10.1128/AEM.00706-15
Volume:
81
Issue:
16
Year Published:
2015
Language:
English
Publisher:
American Society for Microbiology
Publisher location:
Washington, D.C.
Contributing office(s):
Alaska Science Center Biology WTEB
Description:
10 p.
First page:
5583
Last page:
5592
Country:
United States
State:
Alaska
Online Only (Y/N):
N
Additional Online Files (Y/N):
N