Newcastle_disease_in_a_mallard.JPG

Summary

Description Newcastle disease in a mallard.JPG	English: Torticollis (twisted neck) in a mallard with Newcastle disease .
Source	U.S. Geological Survey National Wildlife Health Center Field Manual of Wildlife Diseases: General Field Procedures and Diseases of Birds , Chapter 21 "Newcastle Disease".
Author	Photo credit:Milton Friend

This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey , an agency of the United States Department of the Interior . For more information, see the official USGS copyright policy .

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Summary

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Newcastle disease virus