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Mansoura Veterinary Medical Journal

Corresponding Author

Amin, A

Document Type

Original Article

Subject Areas

Virology

Keywords

Infectious bursal disease virus(IBDV), virus isolation, agar gel precipitation test (AGPT), indirect fluorescence antibody test (IFAT)

Abstract

In the present study, a total of 35 samples including bursa of Fabricius, thymus, spleen,kidney and liver (7samples for each organ) were collected from vaccinated chickens flocks at Dakahlia Governorate, Egypt during the period from March 2015 to May 2015. Each sample was pooled randomly from three to five birds (25 to 44 days old). Trials for isolation of the suspected virus from the collected samples were carried out via chorioallantoic membranes (CAMs) of 9 days embryonated chicken eggs (ECEs), collected from hens free from infectious bursal disease virus (IBDV). Three egg passages were carried out for each sample. Hyperimmune serum was prepared against standard IBDV. IBDV in both field and egg passaged samples (after 3rd passage) was identified by agar gel precipitation test (AGPT) and indirect fluorescence antibody test (IFAT). The results revealed that 30 samples (85%) including 7 (70%) samples from bursa of Fabricius and 6 (60%) samples from thymus, spleen and liver and 5(50%) samples from kidney, showed positive results in virus isolation. The positive results percentage by AGPT and IFAT for field samples were 88.5% (31 out of 35samples), while after 3rd passage in ECEs were 70% (22 out of 35 samples) and 88.5%(31 out of 35samples) respectively. The results indicate that the bursa of Fabricius is the best organ for IBDV isolation and AGPT and IFAT could be used for IBDV diagnosis.

Receive Date

2017-09-12

Accept Date

2017-11-16

Publication Date

12-12-2017

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