What is the primary bacterium responsible for true Infectious Coryza in poultry?
Answer
Avibacterium paragallinarum
Infectious Coryza, often termed 'roup,' is specifically attributed to the bacterium *Avibacterium paragallinarum*. While other microorganisms like *Mycoplasma gallisepticum* or *Pasteurella multocida* can complicate the picture by either starting the infection or exacerbating the symptoms once the bird's defenses are compromised by the primary agent, true IC requires the presence of *A. paragallinarum*. Other viruses, such as Infectious Bronchitis Virus (IBV), can produce clinically similar signs, but they do not constitute a definitive Infectious Coryza diagnosis.
Related Questions
What is the primary bacterium responsible for true Infectious Coryza in poultry?What distinct audible sounds are key indicators of respiratory involvement in Coryza?What term describes inanimate objects like contaminated waterers that carry the Coryza agent?How does poor ventilation increase the severity of *A. paragallinarum* infection?What challenging state allows recovered birds to shed *A. paragallinarum* for months?What is the recommended quarantine period for new birds to protect an established flock from IC?Which agents can initiate infection or worsen Coryza after *A. paragallinarum* compromises defenses?When does the shedding of Coryza bacteria typically cease relative to visible recovery?What specific cleaning instruction prevents mechanical transfer of pathogens between pens?What aspect of *A. paragallinarum* infection is *not* resolved by treating secondary bacterial infections with prescribed antibiotics?