Viral Infection & Ovarian Regression: What You Need To Know?

Published: August 7, 2023

By: Dr. Ankur Gupta / Natural Remedy

Introduction

Commercial egg-laying chickens reach sexual maturity (begin laying eggs) at about 16-18 weeks of age. At 30-32 weeks of age, they attain their peak egg production. During the first year of laying, hens maintain a high laying rate (> 90%) (an average hen lays > 320 eggs), and subsequently, egg production gradually drops, indicating a decrease in ovarian function. The ovulatory cycle in hens lasts about 24-26 hours, depending on age (e.g., shorter in young laying hens and longer in senior chickens). Better ovarian health is essential for maintaining optimal egg production, and regression of the ovary and follicle is a typical cause of egg production compromise.

Reasons for ovary regression

Regression of the ovary is frequently caused by low body weight, deliberate reduction of feed, overcrowding, or lack of feeder space, and infectious diseases. It can also occur as a result of extreme stress, which is frequently followed by feather moulting, emaciation, and dehydration. The following viral infections have been linked to ovarian regression:

Newcastle disease
Marek’s Disease
Infectious Bronchitis
Avian influenza

The negative consequences of viral illnesses cause a temporary or permanent reduction in egg production, as well as the generation of low-quality eggs. Several factors, including the bird’s age, the virus strain infecting it, and the section of the reproductive system implicated, all contribute to the type of reproductive sickness encountered.

Let’s look at how different viral infections affect reproductive organs and how they affect egg production percentage.

Viral Infection & Ovarian Regression: What You Need To Know? - Image 1

Conclusions

In recent decades, intensive poultry production has demonstrated both positive and negative consequences. Viral infections that specifically target reproductive organs or create severe health problems have been demonstrated to have varied degrees of negative effects on egg production. The type of reproductive sickness detected is influenced by a number of parameters, including the host species, virus strain, and the animal’s age and immune condition. Using advanced techniques such as molecular analysis, microscopy, and virus culture and detection, we can gain a better knowledge of the pathogenesis of these viral infections’ reproductive illnesses. Analytical and biological methodologies will help to understand the systemic alterations that may have a negative influence on egg production and quality.

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