Reovirus Infection is a chicken health condition. Reoviral arthritis causes joint damage and lameness but is usually not immediately fatal. Affected flocks experience reduced growth, mobility problems, and production losses. This guide covers what to watch for, causes, treatment, and prevention strategies.
What It Looks Like
Watch for these signs:
Legs and joints (hocks, knees): Joints appear enlarged; bird has difficulty walking or is lame
Legs (tendon areas): Tendons in legs are visibly swollen; foot may be dragged
Behavior/legs: Bird sits more; avoids walking or standing
Overall development: Affected chicks grow slowly; development is stunted
Digestive system (visible in droppings): Loose, watery, or foamy droppings present
Feathers and general behavior: Feathers appear unkempt; bird is depressed and inactive
Likely Causes
- Infection with reovirus (multiple strains affect poultry)
- Transmitted through respiratory droplets and feces
- Can be vertically transmitted through eggs
- Stress, overcrowding, and poor sanitation increase severity
- Chicks in first few weeks most susceptible
- Secondary bacterial infections worsen disease
About This Condition
Body System Affected: Musculoskeletal system (joints and tendons) and digestive system
Severity: moderate
Contagious: Yes, spreads between birds
Affected Age Groups: chicks, pullets
What to Do
No specific antiviral treatment. Supportive care is critical: provide soft bedding, warm environment, easily accessible feed/water, and pain relief if available. Provide broad-spectrum antibiotics to prevent secondary bacterial infection. Maintain strict biosecurity to prevent spread. Most affected birds recover partially but may have permanent joint damage.
When to See a Vet
See a vet if chicks show lameness and joint swelling. identification may require blood testing or PCR. Your vet can recommend supportive care and biosecurity measures.
Prevention
Source chicks from reovirus-negative hatcheries if possible. Maintain strict biosecurity: quarantine new birds, disinfect equipment. Provide clean, dry bedding and proper ventilation. Reduce stressors through proper management. Feed high-quality, nutrient-dense feed to support immune function.
Frequently Asked Questions
Q1: Is reoviral arthritis the same as viral arthritis?
Reoviral arthritis is one type of viral arthritis. Other viruses can cause similar arthritis, but reovirus is a common cause in young birds.
Q2: Can affected birds recover mobility?
Some recovery may occur over weeks to months. However, permanent joint damage is common. Affected birds may have reduced mobility and productivity for life.
Q3: Is reovirus transmissible to humans?
Poultry reoviruses do not infect humans. Practice good hand hygiene when handling infected birds or contaminated bedding.