Field Investigation on the Prevalence of Avian Influenza Virus
Infection in Some Localities in
Saudi Arabia
Abdullah N. Alkhalaf
Department of Veterinary Medicine, College of Agriculture and
Veterinary Medicine, Qassim University, P. O. Box 1482, Buraydah,
Saudi Arabia. Corresponding author: analkhalaf@yahoo.com
Abstract
The objective of this study was to find out
prevalence and types of avian influenza virus (AIV) among broilers, native
chickens, ducks and pigeons in Saudi Arabia. Field investigation was carried out in four
localities including Al-Qassim, Hail, Al-Jouf and Northern Border regions. Serum
sample, tracheal and cloacal swabs were collected from broilers (n=1561), layers
(n=988), ducks (n=329), and pigeons (n=450) from these localities and tested for
three different avian influenza viruses (H9, H5 and H3) using Enzyme linked
immunosorbent (ELISA) test, hamagglutination inhibition (HI test) and polymerase
chain reaction (PCR). All tested samples were negative for H5 and H3 viruses. In
contrast, all positive results were found to be for H9 AI virus using PCR, ELISA
and HI test. Chicken sera tested by ELISA for AIV revealed the highest positive
samples in Northern Border regions (45.71%), followed by Al-Jouf (29.65%), Al-Qassim
(23.98%) and Hial (20.94%) with non-significant difference (χ2=5.983;
P=0.112). HI test carried out on duck sera revealed 35.90% prevalence of
antibodies against AIV. PCR amplification resulted in 34.28 and 21.36% positive
samples in ducks and chickens, respectively. The highest (45.71%) PCR positive
chicken samples were from Northern Border regions, followed by Al-Jouf (24.13%),
Al-Qassim (19.30%) and Hail (16.69%) with significant difference (χ2=7.620;
P=0.055). All tested pigeons samples were negative for the three virus serotypes
included in the study.
Key words:
Avian influenza virus,
Chickens,
Ducks,
Pigeons, Saudi Arabia