Photograph and photomicrographs from a Pacific loon (Gavia pacifica) found dead in Alaska
![Photograph and photomicrographs from a Pacific loon showing nematodes and lesions.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/media/images/31031%20CoM%20final%20figure.png?itok=cYvgiFre)
Detailed Description
Photograph and photomicrographs from a Pacific loon (Gavia pacifica) found dead in Alaska, USA (A) The proventriculus (arrows) is enlarged and the serosal aspect contains many raised serpentine tracts. An asterisk (*) indicates the ventriculus. (B) The outer tunica muscularis of the proventriculus is expanded by several nematodes within cavities lined by epithelioid macrophages and eosinophilic material (granulomas). Nematodes have a smooth cuticle (arrow), coelomyarian-polymyarian musculature (*), a pseudocoelom, and a pseudomembrane (arrowheads). H&E stain. (C) Detail of (B). Note the coelomyarian-polymyarian musculature (*) and prominent ventral nerve chord (arrow). The nematode is surrounded by hemorrhage and bacteria (arrowhead). H&E stain. (D) Eggs are oval, thick-shelled, mamillated, and operculated (arrowhead). H&E stain.
Sources/Usage
Public Domain.