Avian influenza, commonly known as bird flu, can manifest in various ways depending on the strain of the virus and the species affected.
Birds infected with avian influenza often experience a sudden increase in body temperature, which is one of the initial signs of infection.
This can include coughing, sneezing, nasal discharge, and difficulty breathing. Birds may exhibit labored breathing or gasping for air.
In poultry, a drop in egg production or abnormal eggs (e.g., soft-shelled, misshapen) can indicate avian influenza infection.
Infected birds may appear weak, lethargic, and reluctant to move or eat. They may spend more time resting or lying down.
Birds infected with avian influenza may exhibit a reduced appetite or show disinterest in food and water.
Some strains of avian influenza can cause swelling in the head region of birds, including the wattles and comb in poultry.
Infected birds may develop watery or bloody diarrhea. This can lead to dehydration if not addressed promptly.
Certain strains of avian influenza virus can affect the nervous system, leading to neurological symptoms such as tremors, paralysis, or lack of coordination.
Infected birds may experience weight loss, which can be significant in a short period, particularly in poultry.
In severe cases or with highly pathogenic strains of avian influenza, affected birds may die suddenly without showing many clinical signs. This is particularly common in outbreaks of highly pathogenic avian influenza (HPAI) in poultry farms.