More Cell Culture Passaged Camelpox Virus Sequences Found Resembling Those of Vaccinia Virus

Khalafalla , Abdelmalik I.; Al Hosani , Mohamed A.; Ishag , Hassan Zackaria Ali; Al Muhairi , Salama S.

doi:10.4314/ovj.v10i2.4

Article Details

More Cell Culture Passaged Camelpox Virus Sequences Found Resembling Those of Vaccinia Virus

Authors:

Khalafalla , Abdelmalik I. | Al Hosani , Mohamed A. | Ishag , Hassan Zackaria Ali | Al Muhairi , Salama S.

Publisher:

Faculty of Veterinary Medicine, University of Tripoli

Main Topics:

Medicine

Journal:

Open Veterinary Journal 2020 Vol.10 Issue 2, pp.144-156

Document Type:

Article

Publication Date:

4/2020

Document Language:

English

Document ID (Org No.):

244466

Frequency:

Tri-Annual

eISSN:

22186050

pISSN:

22264485

DOI:

10.4314/ovj.v10i2.4

Descriptors:

Keywords:

Abstract:

 Background: Camelpox is the most infectious and economically important disease of camelids that causes significant morbidity and mortality rates. Several live attenuated vaccines against Camelpox virus (CMLV) are produced worldwide by passaging field isolates in cell culture. Sequence of a high passage Saudi isolate of CMLV was previously found closely resembled Vaccinia virus (VACV).
Aim: To determine whether other high cell culture passage CMLV isolates are genetically resemble VACV and further to explore the possible mechanism of the resemblance.
Methods: We performed polymerase chain reaction and DNA sequence analysis of A-type inclusion body protein (ATIP), L1R, and open reading frame (ORF) 185 genes on different cell culture passage levels of a field isolate, two high passage vaccines, wild-type, and reference strains of CMLV.
Results: We demonstrate that additional two high passage attenuated vaccine candidate from Sudan and UAE likewise contain sequences resembling VACV more than CMLV. Furthermore, sequence analysis of the ATIP gene of selected virus passages in cell culture revealed that the shift to VACV-like occurred between passage 11 and 20 and up to the 10th passage the genome still resembles wild-type virus. This observation was further confirmed by recombination analysis which indicated recombination events at ATIP and ORF185 genes occurred at higher passages.
Conclusion: We confirmed that the cell culture passage CMLV turns to resemble VACV after cell culture passage and concluded that the resemblance may not be a result of contamination or misidentification as previously thought but could be due to recombination events that occurred during the passage process.

Article Details

More Cell Culture Passaged Camelpox Virus Sequences Found Resembling Those of Vaccinia Virus

Authors:

Khalafalla , Abdelmalik I. | Al Hosani , Mohamed A. | Ishag , Hassan Zackaria Ali | Al Muhairi , Salama S.

Publisher:

Faculty of Veterinary Medicine, University of Tripoli

Main Topics:

Medicine

Journal:

Open Veterinary Journal 2020 Vol.10 Issue 2, pp.144-156

Document Type:

Article

Publication Date:

4/2020

Document Language:

English

Document ID (Org No.):

244466

Frequency:

Tri-Annual

eISSN:

22186050

pISSN:

22264485

DOI:

10.4314/ovj.v10i2.4

Descriptors:

VETERINARY MEDICINE

CAMELS

ANIMAL VIRUSES

VACCINIA

Camelpox Virus

Cell Culture Passage

Phylogenetic Analysis

Issues

Article Details

Authors: Khalafalla , Abdelmalik I. | Al Hosani , Mohamed A. | Ishag , Hassan Zackaria Ali | Al Muhairi , Salama S.

Publisher: Faculty of Veterinary Medicine, University of Tripoli

Main Topics: Medicine

Journal: Open Veterinary Journal 2020 Vol.10 Issue 2, pp.144-156

Document Type: Article

Publication Date: 4/2020

Document Language: English

Document ID (Org No.): 244466

Frequency: Tri-Annual

eISSN: 22186050

pISSN: 22264485

DOI: 10.4314/ovj.v10i2.4

Descriptors:

Issues

Authors:

Khalafalla , Abdelmalik I. | Al Hosani , Mohamed A. | Ishag , Hassan Zackaria Ali | Al Muhairi , Salama S.

Publisher:

Faculty of Veterinary Medicine, University of Tripoli

Main Topics:

Medicine

Journal:

Open Veterinary Journal 2020 Vol.10 Issue 2, pp.144-156

Document Type:

Article

Publication Date:

4/2020

Document Language:

English

Document ID (Org No.):

244466

Frequency:

Tri-Annual

eISSN:

22186050

pISSN:

22264485

DOI:

10.4314/ovj.v10i2.4