What bacterium is the principal pathogen responsible for Infectious Coryza?

Answer

*Avibacterium paragallinarum*

The fundamental biological cause identified as the principal pathogen responsible for the Infectious Coryza disease complex is the bacterium *Avibacterium paragallinarum*. When a bird contracts the disease, it is because this specific agent has successfully invaded the upper respiratory tract tissues. This organism possesses adaptations allowing it to thrive effectively within the avian respiratory system, establishing the core infection. It is important to recognize that this classification is relatively recent; older scientific literature may list this organism under its former taxonomic name, *Haemophilus paragallinarum*. Recognizing *A. paragallinarum* as the primary trigger is crucial because environmental factors merely enable its proliferation, but the bacteria must be present to initiate the infection.

Related Questions

What bacterium is the principal pathogen responsible for Infectious Coryza?What was *Avibacterium paragallinarum* previously known as in older literature?Which factor is considered a predisposing cause influencing Coryza expression severity?How do high levels of ammonia resulting from poor ventilation affect the respiratory system during Coryza risk?Which agents frequently co-infect birds alongside *A. paragallinarum* causing a more severe syndrome?What is the primary route for *A. paragallinarum* transmission between chickens in a commercial flock?What limits the effectiveness of an Infectious Coryza vaccine regarding *A. paragallinarum* serogroups?How do farm personnel mechanically contribute to the indirect spread of Coryza across a farm?What tell-tale signs signal a flock is likely dealing with coryza upon initial observation?What rigorous environmental assessment should a flock manager prioritize to minimize future IC outbreaks beyond medication?

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