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How to prevent Chicken Anemia Virus (CAV) on your farm
Chicken Anemia Virus (CAV) is a tough disease that targets young chicks and severely weakens their immune systems.
By focusing on the right prevention strategies like proper vaccination schedules, strict barn hygiene, and solid biosecurity, you can lower the risk and keep your birds healthy.
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Cause of Chicken Anemia Virus (CAV)
CAV is caused by a highly contagious circovirus. It hits young chicks the hardest, especially those under two weeks old, by attacking their bone marrow and crashing their immune system. This leaves your birds weak and wide open to secondary infections, which makes early prevention absolutely critical for your flock.
The virus spreads through your barn in two main ways:
- Vertical transmission: Infected breeder hens pass the virus directly into their eggs, meaning the chicks are infected before they even hatch.
- Horizontal transmission: Healthy chicks pick up the virus from infected birds, dirty feed and water lines, or contaminated barn equipment.
How does the Chicken Anemia Virus (CAV) spread?
CAV spreads through a barn quickly, especially if your biosecurity protocols are slipping. Here is how it moves through a flock:
- Direct contact: Healthy birds get infected when exposed to sick birds.
- Contaminated surfaces: Dirty equipment, infected bedding, and even farm hands can track the virus from one flock to the next.
- Poor hygiene: Unclean water lines and poorly sanitized barns give the virus a place to thrive.
- Stress factors: Overcrowded barns, poor rations, and harsh conditions weaken your birds and make them easy targets.
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What are the symptoms of the Chicken Anemia Virus?
CAV isn’t always easy to spot early on, but knowing the signs can save your flock. Watch out for:
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- Pale combs and wattles
- Loss of appetite
- Weakness
- Slow growth
- Anemia (visible as pale skin and mucous membranes)
- Bleeding under the skin or in muscles
How to protect poultry from Chicken Anemia Virus (CAV)
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Vaccination
Make sure breeder hens are vaccinated before they start laying. This protects the chicks through the egg. Talk to your vet about the right timing and vaccine.:format(webp))
Hygiene
Limit farm visitors. Disinfect boots, hands and equipment before entering the poultry house. Each person that enters the farm needs to thoroughly shower and wash to reduce pathogen pressure on the animals and prevent the introduction of disease.:format(webp))
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