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Ather F, Zia MA, Habib M, Shah MSUD. Development of an ELISA for the detection of fowl adenovirus serotype -4 utilizing fiber protein. Biologicals 2024; 85:101752. [PMID: 38401400 DOI: 10.1016/j.biologicals.2024.101752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 02/10/2024] [Accepted: 02/15/2024] [Indexed: 02/26/2024] Open
Abstract
Hydropericardium syndrome (HPS), caused by the Fowl adenovirus 4 (FAdV-4) has led to significant financial losses for the poultry industry globally, including Pakistan over the past few years. Conventional serological methods are time consuming, laborious and less sensitive therefore, a rapid and sensitive ELISA kit is required for the reliable detection of FAdV-4 infection. In the current research, fiber proteins (1 &2) of FAdV-4 were successfully expressed in Escherichia coli and purified using metal affinity chromatography. Using these proteins as antigens, an indirect ELISA for detecting FAdV-4 infection was developed. The developed ELISA showed superior performances upon comparison with Serum neutralization test (SNT). This ELISA also showed reliable detection of FAdV specific antibodies in experimentally infected and vaccinated chickens. This assay produced good correlation on the samples collected from the field with SNT and found essential for large scale serology of the FAdV. No cross reactivity was observed in the ELISA following the testing of the serum samples of different other avian pathogens which showed that this ELISA is specific in detecting the FAdV infection. In conclusion, the developed Fiber protein ELISA is highly sensitive and specific in the detecting the FAdV infection and can be utilized for large scale sero-epidemiology of the disease.
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Affiliation(s)
- Faiza Ather
- College of Biological Sciences, Nuclear Institute for Agriculture and Biology college, (NIAB-C), Pakistan Institute of Engineering and Applied Sciences, Nilore, 44000, Islamabad, Pakistan; Vaccine Development Group, Animal Sciences Division, Nuclear Institute for Agriculture and Biology, Jhang road, P.O Box 128, Faisalabad, 38000., Pakistan
| | - Muhammad Ashir Zia
- Department of Biological Sciences, Virtual University of Pakistan, Lahore, Punjab, 54000, Pakistan.
| | - Mudasser Habib
- College of Biological Sciences, Nuclear Institute for Agriculture and Biology college, (NIAB-C), Pakistan Institute of Engineering and Applied Sciences, Nilore, 44000, Islamabad, Pakistan; Vaccine Development Group, Animal Sciences Division, Nuclear Institute for Agriculture and Biology, Jhang road, P.O Box 128, Faisalabad, 38000., Pakistan
| | - Muhammad Salah-Ud-Din Shah
- College of Biological Sciences, Nuclear Institute for Agriculture and Biology college, (NIAB-C), Pakistan Institute of Engineering and Applied Sciences, Nilore, 44000, Islamabad, Pakistan; Vaccine Development Group, Animal Sciences Division, Nuclear Institute for Agriculture and Biology, Jhang road, P.O Box 128, Faisalabad, 38000., Pakistan.
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Hou L, Su Q, Zhang Y, Liu D, Mao Y, Zhao P. Development of a PCR-based dot blot assay for the detection of fowl adenovirus. Poult Sci 2021; 101:101540. [PMID: 34823181 PMCID: PMC8626688 DOI: 10.1016/j.psj.2021.101540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 09/27/2021] [Accepted: 10/08/2021] [Indexed: 12/03/2022] Open
Abstract
Group-I Fowl adenovirus (FAdV) is still widespread in China's chicken farms, leading to huge economic losses. The traditional PCR method, which can detect all serotypes at the same time, is not sensitive enough to obtain accurate results, especially in some samples containing only a low titer of virus, such as contaminated live vaccine. In order to solve this problem, this study developed a dot blot assay based on the above PCR method. A total of 6 probes targeting the conserved region of FAdV were designed and systematically optimized through sensitivity, accuracy, and stability analyses. Results showed that it is not only suitable for 12 serotypes, but also effectively improve the sensitivity, which increased more than 100 times in comparison with PCR assay. Moreover, this sensitivity was increased 100 times when detecting contaminated live vaccine samples, showing the great prospect of this method in daily monitoring.
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Affiliation(s)
- Lidan Hou
- China Institute of Veterinary Drug Control, Beijing 100081, China; College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Qi Su
- College of Veterinary Medicine, Shandong Agricultural University, Tai'an, Shandong 271001, China
| | - Yawen Zhang
- College of Veterinary Medicine, Shandong Agricultural University, Tai'an, Shandong 271001, China
| | - Dan Liu
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Yaqing Mao
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Peng Zhao
- College of Veterinary Medicine, Shandong Agricultural University, Tai'an, Shandong 271001, China.
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