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Molecular detection and characterization of Orf virus from goats in Egypt
Faculty
Veterinary Medicine
Year:
2022
Type of Publication:
ZU Hosted
Pages:
Authors:
Journal:
Open Veterinary Journal Faculty of Veterinary Medicine University of Tripoli , Libya
Volume:
Keywords :
Molecular detection , characterization , , virus from goats
Abstract:
Background: Orf is a highly contagious viral skin disease in sheep and goats caused by Orf virus (ORFV) in the genus Parapoxvirus. Although sheep and goats are considered an essential food resource, particularly in Africa, ORFV infection represents an increasing challenge to animal productivity causing high economic losses. Aim: This study aimed to detect and characterize the ORFV in suspected clinically diseased goats in two neighboring Egyptian governorates, Al-Sharkia and Ismailia, flocks during April 2020 and July 2021by using PCR and phylogenetic analysis of partial B2L sequence. he present study indicate the necessity for establishing normal heart values in conscious and anaesthetized individuals. Methods: Kids from two Egyptian governorates showed the clinical picture of ORFV infection. Samples were collected (n = 15) from two different flocks during April 2020 and July 2021. PCR was carried out to detect the ORFV by targeting a highly conserved sequence within ORFV (B2L) gene. To determine the phylogenetic relationship with other ORFV strains, sequencing and phylogenetic analysis were performed. Results: ORFV infection was confirmed in 12 samples of oral scabs (80%) by PCR targeting a highly conserved sequence within B2L gene. Sequencing of DNA products was performed and obtained sequences revealed 100% identity at the nucleotide level. Two ORFVs, one from each outbreak showed 98.2% nucleotide identity with a previous Egyptian ORFV (KP984529) whereas our isolates showed higher nucleotide identities, 99.1% and 98.7% with ORFV strains from neighboring countries, Sudan and Ethiopia, respectively. The phylogenetic tree grouped isolates into two main clusters, cluster I included isolates of this study and foreign ones mainly from China, India, and Sudan. Interestingly, the vaccine strains of ORF used in different countries were grouped in cluster II with previous Egyptian isolate (KP984529), Ethiopian and Israeli ORFV isolates.
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