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Abstract
The cytokines IFN-γ, IL-2 and IL-1β play crucial roles in the immune response against viral infections in chickens. Conventional PCR was conducted using primers that can specifically detect chicken anaemia virus (CAV). The expression levels of these cytokines in village poultry that were infected with CAV was investigated using Reverse Transcriptase Quantitative Polymerase Chain Reaction (RT-qPCR). Tissue samples (thymus, liver, bursa of Fabricius and spleen) were collected from village poultry in Nigeria and pooled, and the tissues from each bird were pooled and subsequently subjected to RT-qPCR to determine the expression levels of IFN- γ, IL-2 and IL-1β genes. The result showed an up-regulation of these cytokine genes. Interferon gamma helps in establishing antiviral state in chickens, while IL-2 and IL-1β enhance T cell responses and inflammatory responses, respectively. In viral infections, these cytokines work together to orchestrate an effective immune response. Therefore, understanding the interplay of these cytokines is important for developing strategies that will enhance immune response in chickens particularly against viral infections.
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Copyright (c) 2025 Y. M. Shettima, H. I. Gambo, M. U. Sajo, M. B. Abubuakar, A. D. El-Yuguda (Author)

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References
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- Adair, B. M., McConnel, C. D. G., McNeilly, F., McNulty, M. S. and Coudert, F. (1993). Effect of chicken anemia virus on macrophage and lymphocyte functions in chickens. Avian Diseases, 35:765-773. https://www.cabidigitallibrary.org/doi/full/10.5555/19932293887
- Aiello, S. E. and Mays, A. (1998). The Merck Veterinary Manual 8th edition. Published by Merck and Co. Inc. Whitehouse Station, NJ, USA.
- Cardona, C. J., Oswald, W. B., and Schat, K. A. (2000). Distribution of chicken anaemia virus in the reproductive tissues of specific-pathogen-free chickens. Journal of General Virology, 81(8): 2067-2075. https://doi.org/10.1099/0022-1317-81-8-2067
- Fenner, F. J., Gibb, E. P. J., Murphy, F. A., Rott, R., Studdert, M. J. and White, D. O. (1993). Veterinary Virology. 2nd edition Academic Press, San Diego, C.A, P. 609.
- Giotis, E. S., Rothwell, L., Scott, A., Hu, T., Talbot, R., Todd, D., Burt, D. W., Glass, E. J. and Kaiser, P. (2015). Transcriptomic profiling of virus-host cell interactions following chicken anaemia virus (CAV) infection in an in vivo model. PLoS One, 10(8):e0134866. https://doi.org/10.1371/journal.pone.0134866
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- Hamisu, T. M., Aliyu, H. B., Tan, S. W., Hair-Bejo, M., Omar, A. R., and Ideris, A. (2022). Expression Profiles of Immune-Related Genes and Apoptosis Study of Avian Intraepithelial-Natural Killer Cells in Chickens Inoculated with Vaccine Strain of Newcastle Disease Virus (NDV) and Challenged with Virulent NDV. Avian Diseases, 66(3): 308-318. https://doi.org/10.1637/aviandiseases-D-22-00029
- ICTV (International Committee on Taxonomy of Virus) Access Address: https://ictv.global/taxonomy, Date of access: 15 December, 2024.
- Jarosinski, K. W., O'Connell, P. H., and Schat, K. A. (2003). Impact of deletions within the Bam HI-L fragment of attenuated Marek's disease virus on vIL-8 expression and the newly identified transcript of open reading frame LORF4. Virus Genes, 26: 255-269.
- Jeurissen, S. H., Wagenaar, F., Pol, J. M., Van der Eb, A. J. and Noteborn, M. H. (1992). Chicken anemia virus causes apoptosis of thymocytes after in vivo infection and of cell lines after in vitro infection. Journal of Virology, 66(12): 7383-7388. https://doi.org/10.1128/jvi.66.12.7383-7388.1992
- Jordan, F. T. W. and Pattison, M. (1998). Deep pectoral myopathy of turkeys and chicken. Poultry diseases, sounders, London, UK: 398-399.
- Li, Y., Fang, L., Cui, S., Fu, J., Li, X., Zhang, H., Cui, Z., Chang, S., Shi, W. and Zhao, P. (2017). Genomic characterization of recent chicken anemia virus isolates in China. Frontiers in Microbiology, 8:401-410. https://doi.org/10.3389/fmicb.2017.00401
- Markowski‐Grimsrud, C. J. andSchat, K. A. (2003). Infection with chicken anaemia virus impairs the generation of pathogen‐specific cytotoxic T lymphocytes. Immunology, 109(2): 283-294. https://doi.org/10.1046/j.1365-2567.2003.01643.x
- McNulty, M. S. (1991). Chicken anaemia agent: a review. Avian Pathology, 20(2): 187-203. https://doi.org/10.1080/03079459108418756
- Miller, M. M., Jarosinski, K. W., and Schat, K. A. (2005). Positive and negative regulation of chicken anemia virus transcription. Journal of Virology, 79(5): 2859-2868. https://doi.org/10.1128/jvi.79.5.2859-2868.2005
- Rosario, K., Breitbart, M., Harrach, B., Segalés, J., Delwart, E., Biagini, P. and Varsani, A. (2017). Revisiting the taxonomy of the family Circoviridae: establishment of the genus Cyclovirus and removal of the genus Gyrovirus. Archives of Virology, 162: 1447-1463. https://doi.org/10.1007/s00705-017-3247-y
- Rozypal, T. L., Skeeles, J. K., Dash, J. K., Anderson, E. J., & Beasley, J. N. (1997). Identification and partial characterization of Arkansas isolates of chicken anemia virus. Avian Diseases, 610-616. https://doi.org/10.2307/1592152
- Schat, K.A. (2003). Chicken infectious anemiaIn: Saif, Y.M, et al, (eds). Diseases of poultry (11th Edition). IOWA State Press, Ames, IOWA, 182-202.
- Vaziry, A. (2011). Chicken infectious anemia virus vaccination induces immune disorders and viral persistency in infectious bursal disease virus-infected young chicks. https://hdl.handle.net/1866/5101
References
Adair, B. M. (2000). Immunopathogenesis of chicken anemia virus infection. Developmental & Comparative Immunology, 24(2-3), 247-255. https://doi.org/10.1016/S0145-305X(99)00076-2
Adair, B. M., McConnel, C. D. G., McNeilly, F., McNulty, M. S. and Coudert, F. (1993). Effect of chicken anemia virus on macrophage and lymphocyte functions in chickens. Avian Diseases, 35:765-773. https://www.cabidigitallibrary.org/doi/full/10.5555/19932293887
Aiello, S. E. and Mays, A. (1998). The Merck Veterinary Manual 8th edition. Published by Merck and Co. Inc. Whitehouse Station, NJ, USA.
Cardona, C. J., Oswald, W. B., and Schat, K. A. (2000). Distribution of chicken anaemia virus in the reproductive tissues of specific-pathogen-free chickens. Journal of General Virology, 81(8): 2067-2075. https://doi.org/10.1099/0022-1317-81-8-2067
Fenner, F. J., Gibb, E. P. J., Murphy, F. A., Rott, R., Studdert, M. J. and White, D. O. (1993). Veterinary Virology. 2nd edition Academic Press, San Diego, C.A, P. 609.
Giotis, E. S., Rothwell, L., Scott, A., Hu, T., Talbot, R., Todd, D., Burt, D. W., Glass, E. J. and Kaiser, P. (2015). Transcriptomic profiling of virus-host cell interactions following chicken anaemia virus (CAV) infection in an in vivo model. PLoS One, 10(8):e0134866. https://doi.org/10.1371/journal.pone.0134866
Giotis, E. S., Scott, A., Rothwell, L., Hu, T. and Talbot, R., Todd, D., Burt, D. W., Glass, E. J. and Kaiser, P. (2018). Chicken anemia virus evades host immune responses in transformed lymphocytes. Journal of General Virology, 99(3): 321-7. https://doi.org/10.1099/jgv.0.001011
Hamisu, T. M., Aliyu, H. B., Tan, S. W., Hair-Bejo, M., Omar, A. R., and Ideris, A. (2022). Expression Profiles of Immune-Related Genes and Apoptosis Study of Avian Intraepithelial-Natural Killer Cells in Chickens Inoculated with Vaccine Strain of Newcastle Disease Virus (NDV) and Challenged with Virulent NDV. Avian Diseases, 66(3): 308-318. https://doi.org/10.1637/aviandiseases-D-22-00029
ICTV (International Committee on Taxonomy of Virus) Access Address: https://ictv.global/taxonomy, Date of access: 15 December, 2024.
Jarosinski, K. W., O'Connell, P. H., and Schat, K. A. (2003). Impact of deletions within the Bam HI-L fragment of attenuated Marek's disease virus on vIL-8 expression and the newly identified transcript of open reading frame LORF4. Virus Genes, 26: 255-269.
Jeurissen, S. H., Wagenaar, F., Pol, J. M., Van der Eb, A. J. and Noteborn, M. H. (1992). Chicken anemia virus causes apoptosis of thymocytes after in vivo infection and of cell lines after in vitro infection. Journal of Virology, 66(12): 7383-7388. https://doi.org/10.1128/jvi.66.12.7383-7388.1992
Jordan, F. T. W. and Pattison, M. (1998). Deep pectoral myopathy of turkeys and chicken. Poultry diseases, sounders, London, UK: 398-399.
Li, Y., Fang, L., Cui, S., Fu, J., Li, X., Zhang, H., Cui, Z., Chang, S., Shi, W. and Zhao, P. (2017). Genomic characterization of recent chicken anemia virus isolates in China. Frontiers in Microbiology, 8:401-410. https://doi.org/10.3389/fmicb.2017.00401
Markowski‐Grimsrud, C. J. andSchat, K. A. (2003). Infection with chicken anaemia virus impairs the generation of pathogen‐specific cytotoxic T lymphocytes. Immunology, 109(2): 283-294. https://doi.org/10.1046/j.1365-2567.2003.01643.x
McNulty, M. S. (1991). Chicken anaemia agent: a review. Avian Pathology, 20(2): 187-203. https://doi.org/10.1080/03079459108418756
Miller, M. M., Jarosinski, K. W., and Schat, K. A. (2005). Positive and negative regulation of chicken anemia virus transcription. Journal of Virology, 79(5): 2859-2868. https://doi.org/10.1128/jvi.79.5.2859-2868.2005
Rosario, K., Breitbart, M., Harrach, B., Segalés, J., Delwart, E., Biagini, P. and Varsani, A. (2017). Revisiting the taxonomy of the family Circoviridae: establishment of the genus Cyclovirus and removal of the genus Gyrovirus. Archives of Virology, 162: 1447-1463. https://doi.org/10.1007/s00705-017-3247-y
Rozypal, T. L., Skeeles, J. K., Dash, J. K., Anderson, E. J., & Beasley, J. N. (1997). Identification and partial characterization of Arkansas isolates of chicken anemia virus. Avian Diseases, 610-616. https://doi.org/10.2307/1592152
Schat, K.A. (2003). Chicken infectious anemiaIn: Saif, Y.M, et al, (eds). Diseases of poultry (11th Edition). IOWA State Press, Ames, IOWA, 182-202.
Vaziry, A. (2011). Chicken infectious anemia virus vaccination induces immune disorders and viral persistency in infectious bursal disease virus-infected young chicks. https://hdl.handle.net/1866/5101