Table 2. The Outbreaks of HPAIV H5N1 in the Egyptian Commercial Poultry Farms and the Virus Identification.

Flock No.	Species	Rearing System/Breed	Age/ Days	Clinical Characteristics	Average Mortality Rates	No. of Sampled Birds	No. of H5N1 +ve Birds	Results of HPAI H5N1 Infected Flocks
								Viral Isolation	Routine HA	RT-PCR	IHC
1	Ducks	Backyard/ Mallard	25	Greenish diarrhea and nervous signs	28.50%	1	1	+ve	+ve	+ve	-ve
2	Ducks	Backyard/ Muscovy	30	(Torticollis)	40.00%	3	3	+ve	+ve	+ve	N/A
3	Chicken broilers	Commercial/ Cobb 500*	32		22.85%	9	9	+ve	+ve	+ve	+ve
4	Chicken broilers	Commercial/ Cobb 500*	27	Respiratory signs.	30.32%	9	6	+ve	+ve	+ve	+ve
5	Chicken broilers	Commercial/ Cobb 500*	35	Cyanosis of the head, comb and wattles Subcutaneous edema of head and neck with ecchymoses on the shanks and feet	24.19%	9	3	+ve	+ve	+ve	N/A
6	Chicken layers	Commercial/ Hyline*	105		24.50%	9	9	+ve	+ve	+ve	+ve
7	Chicken layers	Commercial/ Hyline**	101		0.14%	6	3	+ve	+ve	+ve	+ve
Total	Ducks	-	-	-	-	4	4	-	-	-	-
	Chickens	-	-	-	-	42	30	-	-	-	-

* Chicken broiler and layer flocks were vaccinated once with H5 inactivated vaccine.

** This chicken layer flock was vaccinated two times with H5 inactivated vaccine.

Backyard ducks were not vaccinated.

N/A: Not applied

+ve: Positive