Question

Following diseases may originate from hatchery contamination except

• A. New Castle Disease
• B. Aspergillosis
• C. Omphalitis
• D. Staphylococcosis

Hint:

Brooder Pneumonia (Aspergillosis) and Omphalitis are the two most common diseases linked to poor hatchery hygiene.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Hatchery-borne diseases originate from contamination within the incubator, hatcher, or egg-handling environment.
High temperatures and humidity in hatcheries can support the growth of opportunistic bacterial and fungal pathogens if strict sanitation is not maintained.

Step 2: Detailed Explanation:
Let us analyze each disease to determine its primary source of infection:
- Aspergillosis: Also known as "brooder pneumonia," this fungal disease is caused by Aspergillus fumigatus.
Spore contamination in incubator ventilation systems can infect chicks during hatching, making it a classic hatchery-borne disease.
- Omphalitis: Also known as "mushy chick disease," this is a bacterial infection of the unhealed yolk sac and navel.
It is caused by environmental bacteria (such as E. coli or Proteus) contaminating the hatcher trays and infecting chicks immediately after they emerge from the egg.
- Staphylococcosis: This bacterial infection is caused by Staphylococcus species contaminating the hatchery environment and entering through wounds, the navel, or mucous membranes of chicks.
- New Castle Disease: This is a highly contagious viral disease of poultry caused by avian paramyxovirus-
It is spread primarily through direct contact with secretions, aerosol transmission, or vectors in rearing facilities.
It is not classified as a typical hatchery-contamination-born disease.

Step 3: Final Answer:
Unlike the other options, New Castle Disease is a highly contagious viral disease that does not typically originate from hatchery contamination.