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4 results on '"Asif Sajjad"'

1. Ornithobacterium rhinotracheale infection in red wattled lapwings (Vanellus indicus) in Pakistan - a case report.

Author

Umar, Sajid, Iqbal, Mudassar, Khan, Abdul H., Mushtaq, Aqsa, Aqil, Kiran, Jamil, Tariq, Asif, Sajjad, Qamar, Nayab, Shahzad, Asad, and Younus, Muhammad

Abstract

Copyright of Veterinary Archives / Veterinarski Arhiv is the property of University of Zagreb, Faculty of Veterinary Medicine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2017
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2. RETRACTED: Mycoplasma synoviaevaccine modifies virus shedding and immune responses of avian influenza (H9N2) infection in commercial layers

Author

Umar, Sajid, Tanweer, Muhammad, Iqbal, Mudassar, Shahzad, Asad, Hassan, Farooq, Usman, Muhammad, Sarwar, Fozia, Qadir, Hajra, Asif, Sajjad, un-Nisa, Qamar, Younus, Muhammad, Ali, Asif, Akbar, Mehboob, Towakal, Farhan, and Shah, Muhammad Ali

Abstract

This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy).

Published
2017
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3. Variation in Viral Shedding Patterns between Domestic and Wild Terrestrial Birds Infected Experimentally with Reassortant Avian Influenza Virus (H9N2)

Author

Umar, Sajid, Asif, Sajjad, Usman, Muhammad, Atif, Muhammad, Ali, Shahzad, Munir, Muhammad Tanveer, Ali, Asif, Shahzad, Muhammad, and Shah, Muhammad Ali Abdullah

Abstract

Avian influenza (H9N2) virus infection is an emerging respiratory problem and its prevalence varies significantly among different species of birds. The current knowledge about virus shedding parameters in terrestrial birds is limited. With this in mind, the present study was conducted in different domestic and wild terrestrial birds to investigate species-related differences in infectivity and pattern of viral shedding associated with H9N2 AI virus. Groups of terrestrial birds (domestic Guinea Fowl Numida meleagridis, Japanese Quail Coturnix coturnix japonica, House Sparrows Passer domesticus, House Crows Corvus splendensand Bank Myna Acridotheres ginginianus) were inoculated intra-nasally with A/chicken/Pakistan/10RS3039-284-48/2010 (H9N2) AI virus (106EID50) and then examined for infectivity and virus shedding patterns. With the exception of House Crows, all infected birds showed clinical signs of different severity, showing the most prominent disease signs in Japanese Quail. All infected birds showed positive results for virus shedding, however, the pattern of virus shedding was different among wild terrestrial birds. Japanese Quail showed the highest levels of virus shedding while samples collected from House Crows revealed only very low levels. Interestingly, virus shedding was observed predominantly viathe gastrointestinal tract in House Sparrows and Bank Myna and viathe buccal cavity route in Guinea Fowl and Japanese Quail. Here we investigated that the novel genotype of H9N2 AI virus circulating in Pakistan causes clinical disease signs in domestic and wild terrestrial birds. The results of this study suggest that virus shedding varies between different related avian species and highlights the potential role of Guinea Fowl, Japanese Quail, House Sparrows and Bank Myna as mixing bowls for the transmission and maintenance of H9N2 AI viruses between premises.

Published
2016
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4. Retraction notice to “Mycoplasma synoviaevaccine modifies virus shedding and immune responses of avian influenza (H9N2) infection in commercial layers” [Poult. Sci. 96 (2017) 3086–3095]

Author

Umar, Sajid, Tanweer, Muhammad, Iqbal, Mudassar, Shahzad, Asad, Hassan, Farooq, Usman, Muhammad, Sarwar, Fozia, Qadir, Hajra, Asif, Sajjad, Qamar, un-Nisa, Younus, Muhammad, Ali, Asif, Akbar, Mehboob, Towakal, Farhan, and Shah, Muhammad Ali

Abstract

This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy).

Published
2020
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