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Internal Layer (in Poultry)

By

Rodrigo A. Espinosa

, DVM, MAM, DACPV, Aviagen, Inc

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

In these hens, partially or fully formed eggs are found in the abdominal cavity. Such eggs reach the cavity by reverse peristalsis of the oviduct. If they have no shell, they are often misshapen because of partial or complete absorption of the contents. Frequently, only empty shell membranes are present. No control or treatment is known. This condition is related to erratic ovulation and defective egg syndrome Defective or Abnormal Eggs in Poultry Flock challenged by infectious bronchitis virus. Flock challenged by infectious bronchitis virus. Most “ridged,” “sunburst,” “slab-sided,” soft-shelled, or double-shelled eggs are the result... read more Defective or Abnormal Eggs in Poultry . Internal ovulations can happen throughout the life of the hen. Some hens are chronic internal layers.

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Avian Influenza
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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