Low Pathogenic Avian Influenza (H9N2) In Poultry

Low Pathogenic Avian Influenza

Low Pathogenic Avian Influenza (H9N2) just only one of the subtypes of Avian Influenza virus in poultry. It is referred to as the disease named avian influenza caused by infection with avian (bird) influenza (flu) Type A viruses in poultry. It’s also known as Bird Flu. Low Pathogenic Avian Influenza (H9N2) is more available compared to HPAI.

Types of infection

There are two types of avian Influenza infection found in birds 1) High pathogenic Avian influenza( HPAI) 2) Low pathogenic Avian Influenza (LPAI). So LPAI just only one of many subtypes in poultry.

Extensive mortality occurred at HPAI due to disease only seen in the peracute stage.

Clinical Signs

Clinical signs show Low Pathogenic Avian Influenza(LPAI) suddenly but mortality low in laying than broiler birds. the bird can remain infected for 1- 2 weeks but recovered after the disappearance of clinical signs.

Clinical signs vary from stage of infection, time & weather condition. this severity occurred when day length increase but cold weather at night by the overflow of air pressured increased.

Table showing difference in symptoms between low and high pathogenic avian influenza

FACTORS	LOW PATHOGENIC AVIAN INFLUENZA (H9N2)	HIGH PATHOGENIC AVIAN INFLUENZA (H5N1)
Feed intake reduction	Yes	No
Coughing	Yes	No
Sneezing	Yes	No
Respiratory difficulty	Yes	No
Greenish feces	Yes	Excessive milky with slight green
High fever	Before death	After death
Watery crop	No	Yes
Egg production reduction	Yes	No
Eggshell defects	Yes	No
Water intake reduction	Yes	No
Mortality	upt0 20%	60-100%
Time of recovery	within 10-14 days from infecting day	Not possible
Sudden death	birds dying after few days	Yes, normal birds dying suddenly

Md Ramzan Ali, DVM
Poultry consultant,
Contact: ramzandvm08@gmail.com

Related Post

Fowl Typhoid: Clinical Signs In Chicks

Necrotic Enteritis in laying Hen

Follow Us

• 
• 
• 
•