Infectious Coryza
Poultry Pathology (Path-611)
Lecture 32
Dr. Muhammad Kashif Saleemi
DVM, M.Sc (Hons.), PhD
Associate Professor (Tenured)
Member National Disease Control Committee (NDCC)
US-NAS One Health Fellowship
Head Diagnostic Laboratory Department of Pathology
Department of Pathology, Faculty of Veterinary Science,
University of Agriculture, Faisalabad, Pakistan
, Introduction
As early as 1920, Beach believed that IC was a distinct
clinical entity. The etiologic agent was unidentified for a
number of years, because the disease was often masked in
mixed infections and particular with fowl pox
The clinical syndrome has been recognized since the 1930s.
In 1932, De Blieck isolated the causative agent and named
it Bacillus hemoglobinophilus coryzae gallinarum
The disease occurs worldwide and causes economic losses
due to increased number of culls in broilers
Marked drop in egg production in layers and breeders (10%
to more than 40%)
Multi-age farms are more susceptible.
, Definition and Occurrence
Infectious coryza is an acute to sub acute disease characterized
by:
• Conjunctivitis
• Oculonasal discharge
• Swollen infraorbital sinuses
• Facial edema
• Sneezing
• Airsacculitis
All ages of chickens are susceptible although most outbreaks
occur in chickens that are half grown or older (>14 Week).
The disease is seen more frequently on chicken farms where
facilities are used so intensively that they are never free of
chickens.
The disease has a worldwide distribution
Poultry Pathology (Path-611)
Lecture 32
Dr. Muhammad Kashif Saleemi
DVM, M.Sc (Hons.), PhD
Associate Professor (Tenured)
Member National Disease Control Committee (NDCC)
US-NAS One Health Fellowship
Head Diagnostic Laboratory Department of Pathology
Department of Pathology, Faculty of Veterinary Science,
University of Agriculture, Faisalabad, Pakistan
, Introduction
As early as 1920, Beach believed that IC was a distinct
clinical entity. The etiologic agent was unidentified for a
number of years, because the disease was often masked in
mixed infections and particular with fowl pox
The clinical syndrome has been recognized since the 1930s.
In 1932, De Blieck isolated the causative agent and named
it Bacillus hemoglobinophilus coryzae gallinarum
The disease occurs worldwide and causes economic losses
due to increased number of culls in broilers
Marked drop in egg production in layers and breeders (10%
to more than 40%)
Multi-age farms are more susceptible.
, Definition and Occurrence
Infectious coryza is an acute to sub acute disease characterized
by:
• Conjunctivitis
• Oculonasal discharge
• Swollen infraorbital sinuses
• Facial edema
• Sneezing
• Airsacculitis
All ages of chickens are susceptible although most outbreaks
occur in chickens that are half grown or older (>14 Week).
The disease is seen more frequently on chicken farms where
facilities are used so intensively that they are never free of
chickens.
The disease has a worldwide distribution
