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Neoplasia of the Reproductive System in Poultry

By

Rodrigo A. Espinosa

, DVM, MAM, DACPV, Aviagen, Inc

Last full review/revision Aug 2019 | Content last modified Sep 2019

The most frequent tumor of the reproductive system is adenocarcinoma of the oviduct. Neoplastic cells are shed from tumors in the oviduct into the abdominal cavity. They implant on the ovary, pancreas, and other viscera and produce multiple, hard, yellow nodules. They may block lymph return and result in ascites. The incidence increases with age, and this tumor may be a frequent cause of death after 2 years. Affected hens are condemned at processing.

Leiomyoma of the broad ligament is an estrogen-induced hypertrophy of the smooth muscle of the broad ligament. It is benign and is an incidental finding at necropsy or processing.

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Influenza A viruses are divided into 16 hemagglutinin (H1-16) and 9 neuraminidase (N1-9) subtypes. Which of the following subtypes is most likely to cause a highly pathogenic form of avian influenza in poultry? 
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