Newcastle disease
noun
New·cas·tle disease
ˈnü-ˌka-səl- 
ˈnyü-;
n(y)ü-ˈka-
: a contagious often fatal viral disease of birds and especially the domestic chicken that is caused by a paramyxovirus (Orthoavulavirus javanese) and that is marked by respiratory and nervous symptoms
Examples of Newcastle disease in a Sentence
Recent Examples on the Web
The detection of Newcastle disease, a viral condition often fatal to chickens, in some parts of Brazil impedes the South American nation’s ability to become a significant U.S. egg supplier, market insiders say.
—
Vanessa Gera and Kerstin Sopke, Los Angeles Times, 29 Mar. 2025
An additional concern about raw eggs being imported from Mexico include the potential transmission of Virulent Newcastle disease or VND, U.S. Customs and Border Protection said.
—Jenny Porter Tilley, Louisville Courier Journal, 28 Mar. 2025
However, Brazil is affected by Newcastle disease, a virus that often kills poultry, the U.S. Department of Agriculture said, and the country cannot supply the U.S. with eggs for sale in grocery stores or pasteurized liquid eggs for human consumption.
—Tom Polansek, USA TODAY, 24 Mar. 2025
Researchers at the Icahn School of Medicine at Mount Sinai in New York City selected a bird pathogen, Newcastle disease virus (NDV).
—Stephani Sutherland, Scientific American, 15 Oct. 2024
This hurdle does not seem insurmountable, the experts Vox spoke with said, since poultry already receive several vaccines such as those for Newcastle disease, salmonella, and bronchitis.
—Jess Craig, Vox, 14 May 2024
Birds can carry highly contagious diseases affecting poultry, like the virulent Newcastle disease and Highly Pathogenic Avian Influenza.
—Marisa Garcia, Forbes, 18 Feb. 2024
Contaminated eggshells can spread avian diseases like Newcastle disease and Highly Pathogenic Avian Influenza.
—Zoe Sottile, CNN, 28 Mar. 2023
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Vanessa Gera and Kerstin Sopke, Los Angeles Times, 29 Mar. 2025
An additional concern about raw eggs being imported from Mexico include the potential transmission of Virulent Newcastle disease or VND, U.S. Customs and Border Protection said.
—Jenny Porter Tilley, Louisville Courier Journal, 28 Mar. 2025
However, Brazil is affected by Newcastle disease, a virus that often kills poultry, the U.S. Department of Agriculture said, and the country cannot supply the U.S. with eggs for sale in grocery stores or pasteurized liquid eggs for human consumption.
—Tom Polansek, USA TODAY, 24 Mar. 2025
Researchers at the Icahn School of Medicine at Mount Sinai in New York City selected a bird pathogen, Newcastle disease virus (NDV).
—Stephani Sutherland, Scientific American, 15 Oct. 2024
This hurdle does not seem insurmountable, the experts Vox spoke with said, since poultry already receive several vaccines such as those for Newcastle disease, salmonella, and bronchitis.
—Jess Craig, Vox, 14 May 2024
Birds can carry highly contagious diseases affecting poultry, like the virulent Newcastle disease and Highly Pathogenic Avian Influenza.
—Marisa Garcia, Forbes, 18 Feb. 2024
Contaminated eggshells can spread avian diseases like Newcastle disease and Highly Pathogenic Avian Influenza.
—Zoe Sottile, CNN, 28 Mar. 2023
Cite this Entry
“Newcastle disease.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Newcastle%20disease. Accessed 11 Nov. 2025.
Copy CitationMedical Definition
Newcastle disease
noun
New·cas·tle disease
ˈn(y)ü-ˌkas-əl-, n(y)ü-ˈ
: a contagious mild to fatal viral disease of birds and especially the domestic chicken that is caused by a paramyxovirus (Orthoavulavirus javaense), that is marked by highly variable respiratory, digestive, and nervous clinical signs (such as sneezing, diarrhea, and incoordination) and that is especially destructive to young birds
called also pseudoplague
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