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Sánchez-Cano A, Camacho MC, Ramiro Y, Cardona-Cabrera T, Höfle U. Seasonal changes in bird communities on poultry farms and house sparrow-wild bird contacts revealed by camera trapping. Front Vet Sci 2024; 11:1369779. [PMID: 38444782 PMCID: PMC10912304 DOI: 10.3389/fvets.2024.1369779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Accepted: 02/07/2024] [Indexed: 03/07/2024] Open
Abstract
Introduction Wild birds are considered reservoirs of poultry pathogens although transmission routes have not been conclusively established. Here we use camera trapping to study wild bird communities on commercial layer and red-legged partridge farms over a one-year timeframe. We also analyze direct and indirect interactions of other bird species with the house sparrow (Passer domesticus), a potential bridge host. Methods We conducted camera trapping events between January 2018 and October 2019, in two caged layer farms, one free-range layer farm, and two red-legged partridge farms in South-Central Spain. Results and Discussion We observed wild bird visits on all types of farms, with the significantly highest occurrence on red-legged partridge farms where food and water are more easily accessible, followed by commercial caged layer farms, and free-range chicken farms. The house sparrow (Passer domesticus) followed by spotless starlings (Sturnus unicolor) was the most encountered species on all farms, with the highest frequency in caged layer farms. On partridge farms, the house sparrow accounted for 58% of the wild bird detections, while on the free-range chicken farm, it made up 11% of the detections. Notably, the breeding season, when food and water are scarce in Mediterranean climates, saw the highest number of wild bird visits to the farms. Our findings confirm that the house sparrow, is in direct and indirect contact with layers and red-legged partridges and other wild birds independent of the type of farm. Contacts between house sparrows and other bird species were most frequent during the breeding season followed by the spring migration period. The species most frequently involved in interactions with the house sparrow belonged to the order Passeriformes. The study provides a comparative description of the composition and seasonal variations of bird communities in different types of layer/ poultry farms in Southern Spain i.e. a Mediterranean climate. It confirms the effectiveness of biosecurity measures that restrict access to feed and water. Additionally, it underscores the importance of synanthropic species, particularly the house sparrow, as potential bridge vector of avian pathogens.
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Affiliation(s)
- Alberto Sánchez-Cano
- SaBio Research Group, Institute for Game and Wildlife Research IREC (CSIC-UCLM-JCCM), Ciudad Real, Spain
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Raj S, Alizadeh M, Matsuyama-Kato A, Boodhoo N, Denis MS, Nagy É, Mubareka S, Karimi K, Behboudi S, Sharif S. Efficacy of an inactivated influenza vaccine adjuvanted with Toll-like receptor ligands against transmission of H9N2 avian influenza virus in chickens. Vet Immunol Immunopathol 2024; 268:110715. [PMID: 38219434 DOI: 10.1016/j.vetimm.2024.110715] [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: 10/22/2023] [Revised: 12/27/2023] [Accepted: 01/02/2024] [Indexed: 01/16/2024]
Abstract
Avian influenza viruses (AIV), including the H9N2 subtype, pose a major threat to the poultry industry as well as to human health. Although vaccination provides a protective control measure, its effect on transmission remains uncertain in chickens. The objective of the present study was to investigate the efficacy of beta-propiolactone (BPL) whole inactivated H9N2 virus (WIV) vaccine either alone or in combination with CpG ODN 2007 (CpG), poly(I:C) or AddaVax™ (ADD) to prevent H9N2 AIV transmission in chickens. The seeder chickens (trial 1) and recipient chickens (trial 2) were vaccinated twice with different vaccine formulations. Ten days after secondary vaccination, seeder chickens were infected with H9N2 AIV (trial 1) and co-housed with healthy recipient chickens. In trial 2, the recipient chickens were vaccinated and then exposed to H9N2 AIV-infected seeder chickens. Our results demonstrated that BPL+ CpG and BPL+ poly(I:C) treated chickens exhibited reduced oral and cloacal shedding in both trials post-exposure (PE). The number of H9N2 AIV+ recipient chickens in the BPL+ CpG group (trial 1) was lower than in other vaccinated groups, and the reduction was higher in BPL+ CpG recipient chickens in trial 2. BPL+ CpG vaccinated chickens demonstrated enhanced systemic antibody responses with high IgM and IgY titers with higher rates of seroprotection by day 21 post-primary vaccination (ppv). Additionally, the induction of IFN-γ expression and production was higher in the BPL+ CpG treated chickens. Interleukin (IL)- 2 expression was upregulated in both BPL+ CpG and BPL+ poly(I:C) groups at 12 and 24 hr post-stimulation.
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Affiliation(s)
- Sugandha Raj
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Mohammadali Alizadeh
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Ayumi Matsuyama-Kato
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Nitish Boodhoo
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Myles St Denis
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Éva Nagy
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Samira Mubareka
- Sunnybrook Research Institute, Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON M4N 3M5, Canada
| | - Khalil Karimi
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Shahriar Behboudi
- The Pirbright Institute, Pirbright, Woking, Surrey GU24 0NE, United Kingdom
| | - Shayan Sharif
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada.
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Verma AK, Kumar M, Murugkar HV, Nagarajan S, Tosh C, Namdeo P, Singh R, Mishra S, Senthilkumar D, Singh VP, Sanyal A. Highly pathogenic avian influenza (H5N1) infection in crows through ingestion of infected crow carcasses. Microb Pathog 2023; 183:106330. [PMID: 37661072 DOI: 10.1016/j.micpath.2023.106330] [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: 07/06/2023] [Revised: 08/31/2023] [Accepted: 08/31/2023] [Indexed: 09/05/2023]
Abstract
The present study was aimed to investigate the role of cannibalism in transmission of H5N1 avian influenza virus to house crows (Corvus splendens). Four crows were intranasally inoculated with 108.0 EID50 (A/crow/India/01CA249/2021) H5N1 highly pathogenic avian influenza (HPAI) virus and were observed for 14 days for any overt signs of illness. Two of the infected crows showed signs of wing paralysis, incoordination, and torticollis. For cannibalism experiment, two crows showing clinical signs were euthanized on 14th day post-infection (dpi) and were kept in the isolator and four naïve healthy crows were introduced along with the euthanized crows. The viscera from the infected carcasses were eaten by all the four crows. Oropharyngeal and cloacal swabs were collected up to 14 days to assess virus excretion. All four crows showed clinical signs viz., dullness, reluctance to move with ruffled feathers on 6th day post cannibalism along with neurological signs including incoordination and paralysis of the wings. All the crows gradually recovered after showing clinical signs and were euthanized on 21st day of observation period. Virus excretion was observed from 3rd to 11th day post cannibalism through both oropharyngeal and cloacal routes with maximum shedding through oropharyngeal route. The virus was isolated from lungs and trachea of one the infected crows at 21st day after euthanasia. All the four crows seroconverted against H5N1 virus infection at 14th day post cannibalism. Our study confirms the transmission of H5N1 virus in crows through cannibalism and highlights how H5N1 virus might circulate in a crow colony once they become infected.
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Affiliation(s)
- Asha Kumari Verma
- ICAR- National Institute of High Security Animal Diseases, Bhopal, Madhya Pradesh, India
| | - Manoj Kumar
- ICAR- National Institute of High Security Animal Diseases, Bhopal, Madhya Pradesh, India.
| | - Harshad V Murugkar
- ICAR- National Institute of High Security Animal Diseases, Bhopal, Madhya Pradesh, India
| | | | - Chakradhar Tosh
- ICAR- National Institute of High Security Animal Diseases, Bhopal, Madhya Pradesh, India
| | - Pushpendra Namdeo
- ICAR- National Institute of High Security Animal Diseases, Bhopal, Madhya Pradesh, India
| | - Rupal Singh
- ICAR- National Institute of High Security Animal Diseases, Bhopal, Madhya Pradesh, India
| | - Suman Mishra
- ICAR- National Institute of High Security Animal Diseases, Bhopal, Madhya Pradesh, India
| | - D Senthilkumar
- ICAR- National Institute of High Security Animal Diseases, Bhopal, Madhya Pradesh, India
| | - Vijendra Pal Singh
- ICAR- National Institute of High Security Animal Diseases, Bhopal, Madhya Pradesh, India
| | - Aniket Sanyal
- ICAR- National Institute of High Security Animal Diseases, Bhopal, Madhya Pradesh, India
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Hasan SMM, Sturm-Ramirez K, Kamal AHM, Islam MA, Rahman M, Kile JC, Kennedy ED, Gurley ES, Islam MS. Quail Rearing Practices and Potential for Avian Influenza Virus Transmission, Bangladesh. ECOHEALTH 2023; 20:167-177. [PMID: 37455270 DOI: 10.1007/s10393-023-01643-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 06/15/2023] [Accepted: 06/16/2023] [Indexed: 07/18/2023]
Abstract
In 2015, human influenza surveillance identified a human infection with A/H9N2 in Dhaka, Bangladesh with evidence of exposure to a sick quail. We conducted in-depth interviews with household quail caregivers, pet bird retail shop owners, and mobile vendors, key informant interviews with pet bird wholesale shop owners, one group discussion with pet bird retail shop workers and unstructured observations in households, pet bird wholesale and retail markets, and mobile bird vendor's travelling areas to explore quail rearing and selling practices among households, mobile vendors, and retail pet bird and wholesale bird markets in Dhaka. Every day, quail were supplied from 23 districts to two wholesale markets, and then sold to households and restaurants directly, or through bird shops and mobile vendors. All respondents (67) reported keeping quail with other birds in cages, feeding quail, cleaning feeding pots, removing quail faeces, slaughtering sick quail, and discarding dead quail. Children played with quail and assisted in slaughtering of quail. Most respondents (94%) reported rinsing hands with water only after slaughtering and disposing of wastes and dead quail. No personal protective equipment was used during any activities. Frequent unprotected contact with quail and their by-products potentially increased the risk of cross-species avian influenza virus transmission. Avian influenza surveillance in retail pet bird and wholesale bird markets, mobile vendors, and households may identify cases promptly and reduce the risk of virus transmission.
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Affiliation(s)
- S M Murshid Hasan
- Programme for Emerging Infections, Infectious Diseases Division, ICDDR,B, Dhaka, Bangladesh.
- Department of Society and Health, Mahidol University, Bangkok, Thailand.
| | | | - Abu-Hena Mostofa Kamal
- Programme for Emerging Infections, Infectious Diseases Division, ICDDR,B, Dhaka, Bangladesh
- Department of Humanities, Khulna University of Engineering and Technology (KUET), Khulna, Bangladesh
| | - Mohammad Ariful Islam
- Programme for Emerging Infections, Infectious Diseases Division, ICDDR,B, Dhaka, Bangladesh
| | - Mahmudur Rahman
- Institute of Epidemiology Disease Control and Research, Dhaka, Bangladesh
| | - James C Kile
- Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Erin D Kennedy
- Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Emily S Gurley
- Programme for Emerging Infections, Infectious Diseases Division, ICDDR,B, Dhaka, Bangladesh
- Johns Hopkins Bloomberg School of Public Health, Baltimore, USA
| | - Md Saiful Islam
- Programme for Emerging Infections, Infectious Diseases Division, ICDDR,B, Dhaka, Bangladesh
- School of Population Health, University of New South Wales, Sydney, Australia
- Research School of Population Health, ANU College of Health and Medicine, The Australian National University, Canberra, Australia
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Raj S, Matsuyama-Kato A, Alizadeh M, Boodhoo N, Nagy E, Mubareka S, Karimi K, Behboudi S, Sharif S. Treatment with Toll-like Receptor (TLR) Ligands 3 and 21 Prevents Fecal Contact Transmission of Low Pathogenic H9N2 Avian Influenza Virus (AIV) in Chickens. Viruses 2023; 15:v15040977. [PMID: 37112957 PMCID: PMC10146471 DOI: 10.3390/v15040977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 04/10/2023] [Accepted: 04/14/2023] [Indexed: 04/29/2023] Open
Abstract
Transmission of H9N2 avian influenza virus (AIV) can occur in poultry by direct or indirect contact with infected individuals, aerosols, large droplets and fomites. The current study investigated the potential of H9N2 AIV transmission in chickens via a fecal route. Transmission was monitored by exposing naïve chickens to fecal material from H9N2 AIV-infected chickens (model A) and experimentally spiked feces (model B). The control chickens received H9N2 AIV. Results revealed that H9N2 AIV could persist in feces for up to 60-84 h post-exposure (PE). The H9N2 AIV titers in feces were higher at a basic to neutral pH. A higher virus shedding was observed in the exposed chickens of model B compared to model A. We further addressed the efficacy of Toll-like receptor (TLR) ligands to limit transmission in the fecal model. Administration of CpG ODN 2007 or poly(I:C) alone or in combination led to an overall decrease in the virus shedding, with enhanced expression of type I and II interferons (IFNs) and interferon-stimulating genes (ISGs) in different segments of the small intestine. Overall, the study highlighted that the H9N2 AIV can survive in feces and transmit to healthy naïve chickens. Moreover, TLR ligands could be applied to transmission studies to enhance antiviral immunity and reduce H9N2 AIV shedding.
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Affiliation(s)
- Sugandha Raj
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Ayumi Matsuyama-Kato
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Mohammadali Alizadeh
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Nitish Boodhoo
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Eva Nagy
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Samira Mubareka
- Sunnybrook Research Institute, Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON M4N 3M5, Canada
| | - Khalil Karimi
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada
| | | | - Shayan Sharif
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada
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Begum JA, Hossain I, Nooruzzaman M, King J, Chowdhury EH, Harder TC, Parvin R. Experimental Pathogenicity of H9N2 Avian Influenza Viruses Harboring a Tri-Basic Hemagglutinin Cleavage Site in Sonali and Broiler Chickens. Viruses 2023; 15:v15020461. [PMID: 36851676 PMCID: PMC9967266 DOI: 10.3390/v15020461] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 02/01/2023] [Accepted: 02/02/2023] [Indexed: 02/09/2023] Open
Abstract
Low-pathogenic avian influenza (LPAI) H9N2 virus is endemic in Bangladesh, causing huge economic losses in the poultry industry. Although a considerable number of Bangladeshi LPAI H9N2 viruses have been molecularly characterized, there is inadequate information on the pathogenicity of H9N2 viruses in commercial poultry. In this study, circulating LPAI H9N2 viruses from recent field outbreaks were characterized, and their pathogenicity in commercial Sonali (crossbred) and broiler chickens was assessed. Phylogenetic analysis of currently circulating field viruses based on the hemagglutinin (HA) and neuraminidase (NA) gene sequences revealed continuous circulation of G1 lineages containing the tri-basic hemagglutinin cleavage site (HACS) motif (PAKSKR*GLF) at the HA protein. Both the LPAI susceptible Sonali and broiler chickens were infected with selected H9N2 isolates A/chicken/Bangladesh/2458-LT2/2020 or A/chicken/Bangladesh/2465-LT56/2021 using intranasal (100 µL) and intraocular (100 µL) routes with a dose of 106 EID50/mL. Infected groups (LT_2-So1 and LT_56-So2; LT_2-Br1 and LT_56-Br2) revealed no mortality or clinical signs. However, at gross and histopathological investigation, the trachea, lungs, and intestine of the LT_2-So1 and LT_56-So2 groups displayed mild to moderate hemorrhages, congestion, and inflammation at different dpi. The LT 2-Br1 and LT 56-Br2 broiler groups showed nearly identical changes in the trachea, lungs, and intestine at various dpi, indicating no influence on pathogenicity in the two commercial bird species under study. Overall, the prominent lesions were observed up to 7 dpi and started to disappear at 10 dpi. The H9N2 viruses predominantly replicated in the respiratory tract, and higher titers of virus were shed through the oropharyngeal route than the cloacal route. Finally, this study demonstrated the continuous evolution of tri-basic HACS containing H9N2 viruses in Bangladesh with a low-pathogenic phenotype causing mild to moderate tracheitis, pneumonia, and enteritis in Sonali and commercial broiler chickens.
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Affiliation(s)
- Jahan Ara Begum
- Department of Pathology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh
| | - Ismail Hossain
- Department of Pathology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh
| | - Mohammed Nooruzzaman
- Department of Pathology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh
| | - Jacqueline King
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institute, Federal Research Institute for Animal Health, Suedufer 10, 17493 Greifswald-Insel Riems, Germany
| | - Emdadul Haque Chowdhury
- Department of Pathology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh
| | - Timm C. Harder
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institute, Federal Research Institute for Animal Health, Suedufer 10, 17493 Greifswald-Insel Riems, Germany
| | - Rokshana Parvin
- Department of Pathology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh
- Correspondence:
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Raj S, Alizadeh M, Shoojadoost B, Hodgins D, Nagy É, Mubareka S, Karimi K, Behboudi S, Sharif S. Determining the Protective Efficacy of Toll-Like Receptor Ligands to Minimize H9N2 Avian Influenza Virus Transmission in Chickens. Viruses 2023; 15:238. [PMID: 36680279 PMCID: PMC9861619 DOI: 10.3390/v15010238] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Revised: 01/10/2023] [Accepted: 01/12/2023] [Indexed: 01/18/2023] Open
Abstract
Low-pathogenicity avian influenza viruses (AIV) of the H9N2 subtype can infect and cause disease in chickens. Little is known about the efficacy of immune-based strategies for reducing the transmission of these viruses. The present study investigated the efficacy of Toll-like receptor (TLR) ligands (CpG ODN 2007 and poly(I:C)) to reduce H9N2 AIV transmission from TLR-treated seeder (trial 1) or inoculated chickens (trial 2) to naive chickens. The results from trial 1 revealed that a low dose of CpG ODN 2007 led to the highest reduction in oral shedding, and a high dose of poly(I:C) was effective at reducing oral and cloacal shedding. Regarding transmission, the recipient chickens exposed to CpG ODN 2007 low-dose-treated seeder chickens showed a maximum reduction in shedding with the lowest number of AIV+ chickens. The results from trial 2 revealed a maximum reduction in oral and cloacal shedding in the poly(I:C) high-dose-treated chickens (recipients), followed by the low-dose CpG ODN 2007 group. In these two groups, the expression of type I interferons (IFNs), protein kinase R (PKR), interferon-induced transmembrane protein 3 (IFITM3), viperin, and (interleukin) IL-1β, IL-8, and 1L-18 was upregulated in the spleen, cecal tonsils and lungs. Hence, TLR ligands can reduce AIV transmission in chickens.
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Affiliation(s)
- Sugandha Raj
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Mohammadali Alizadeh
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada
| | | | - Douglas Hodgins
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Éva Nagy
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Samira Mubareka
- Sunnybrook Research Institute, Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON M4N 3M5, Canada
| | - Khalil Karimi
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada
| | | | - Shayan Sharif
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada
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8
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Eladl AH, Farag VM, El-Shafei RA, Aziza AE, Awadin WF, Arafat N. Immunological, biochemical and pathological effects of vitamin C and Arabic gum co-administration on H9N2 avian influenza virus vaccinated and challenged laying Japanese quails. BMC Vet Res 2022; 18:408. [PMID: 36401270 PMCID: PMC9673443 DOI: 10.1186/s12917-022-03495-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Accepted: 10/31/2022] [Indexed: 11/19/2022] Open
Abstract
Aim This study evaluated the effect of co-administration of vitamin C and Arabic gum (AG) supplements on the response of vaccinated (VAC) and challenged laying Japanese quails with avian influenza virus (AIV) H9N2. Materials and methods One hundred and fifty 49-day-old laying Japanese quails were divided into 5 groups (G1-G5): the G1 group was a negative control, G2 group was unvaccinated + H9N2 challenged (Ch), G3 group was unvaccinated + supplements + Ch, G4 group was VAC + Ch, and the G5 group was VAC + supplements + Ch. The supplements (vitamin C, 1 g/liter of drinking water and AG, 1% ration) were given for 5 weeks post-vaccination (PV). The birds were injected subcutaneously with an inactivated H9N2 vaccine at 49 days of age. The quails were then challenged intranasally with AIV H9N2 at the 3rd week PV. Blood, tracheal swab and tissue samples were collected at the 1st, 2nd, and 3rd weeks PV, and at different time points post-challenge (PC). Results Growth performance, egg production (%), egg and eggshell weights, HI antibody titers, clinical signs, lesions, mortality, virus shedding rates, leukogram, biochemical and immunological parameters and histopathological lesions PC showed significant differences (P < 0.05) between the vaccinated-unsupplemented (G4) group and the vaccinated-supplemented (G5) group. G5 showed the highest (P < 0.05) growth performance, egg production, HI antibody titers, and heterophil phagocytic activity and the lowest heterophil/lymphocyte (H/L) ratio, mortality, virus shedding rates, creatinine level and histopathological lesion scores in the lungs. Conclusion The co-administration of vitamin C and AG for 5 weeks can improve growth performance, egg production and the immune response in vaccinated laying quails challenged with AIV H9N2. Supplementary Information The online version contains supplementary material available at 10.1186/s12917-022-03495-y.
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Kirkeby C, Ward MP. A review of estimated transmission parameters for the spread of avian influenza viruses. Transbound Emerg Dis 2022; 69:3238-3246. [PMID: 35959696 PMCID: PMC10088015 DOI: 10.1111/tbed.14675] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 07/23/2022] [Accepted: 07/29/2022] [Indexed: 02/04/2023]
Abstract
Avian influenza poses an increasing problem in Europe and around the world. Simulation models are a useful tool to predict the spatiotemporal risk of avian influenza spread and evaluate appropriate control actions. To develop realistic simulation models, valid transmission parameters are critical. Here, we reviewed published estimates of the basic reproduction number (R0 ), the latent period and the infectious period by virus type, pathogenicity, species, study type and poultry flock unit. We found a large variation in the parameter estimates, with highest R0 estimates for H5N1 and H7N3 compared with other types; for low pathogenic avian influenza compared with high pathogenic avian influenza types; for ducks compared with other species; for estimates from field studies compared with experimental studies; and for within-flock estimates compared with between-flock estimates. Simulation models should reflect this observed variation so as to produce more reliable outputs and support decision-making. How to incorporate this information into simulation models remains a challenge.
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Affiliation(s)
- Carsten Kirkeby
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark
| | - Michael P Ward
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Sydney, NSW, Australia
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Das Gupta S, Barua B, Fournié G, Hoque MA, Henning J. Village and farm-level risk factors for avian influenza infection on backyard chicken farms in Bangladesh. Sci Rep 2022; 12:13009. [PMID: 35906262 PMCID: PMC9338044 DOI: 10.1038/s41598-022-16489-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 07/11/2022] [Indexed: 11/21/2022] Open
Abstract
A cross-sectional study was conducted with 144 small-scale poultry farmers across 42 Bangladeshi villages to explore risk factors associated with avian influenza H5 and H9 seropositivity on backyard chicken farms. Using mixed-effects logistic regression with village as random effect, we identified crow abundance in garbage dumping places and presence of migratory wild birds within villages to be associated with higher odds of H5 and H9 seropositivity. At farm-level, garbage around poultry houses was also associated with higher odds of H5 and H9 seropositivity. In addition, specific trading practices (such as, purchase of chickens from live bird markets (LBM) and neighboring farms to raise them on their own farms, frequency of visits to LBM, purchase of poultry at LBM for consumption) and contact of backyard chickens with other animals (such as, feeding of different poultry species together, using pond water as drinking source for poultry, access of feral and wild animals to poultry houses) were associated with higher odds of H5 or H9 seropositivity. Resource-constrained small-scale poultry farmers should be able to address risk factors identified in this study without requiring large investments into poultry management, thereby reducing the likelihood of avian influenza virus transmission and ultimately occurrence of avian influenza outbreaks.
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Affiliation(s)
- Suman Das Gupta
- School of Veterinary Science, University of Queensland, Gatton, QLD, 4343, Australia.
| | - Brishti Barua
- Chattogram Veterinary and Animal Sciences University, Chattogram, Bangladesh
| | - Guillaume Fournié
- Department of Pathobiology and Population Sciences, Royal Veterinary College, University of London, London, UK
| | - Md Ahasanul Hoque
- Chattogram Veterinary and Animal Sciences University, Chattogram, Bangladesh
| | - Joerg Henning
- School of Veterinary Science, University of Queensland, Gatton, QLD, 4343, Australia
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11
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Raj S, Astill J, Alqazlan N, Boodhoo N, Hodgins DC, Nagy É, Mubareka S, Karimi K, Sharif S. Transmission of H9N2 Low Pathogenicity Avian Influenza Virus (LPAIV) in a Challenge-Transmission Model. Vaccines (Basel) 2022; 10:vaccines10071040. [PMID: 35891204 PMCID: PMC9316524 DOI: 10.3390/vaccines10071040] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 06/23/2022] [Accepted: 06/25/2022] [Indexed: 01/27/2023] Open
Abstract
Migratory birds are major reservoirs for avian influenza viruses (AIV), which can be transmitted to poultry and mammals. The H9N2 subtype of AIV has become prevalent in poultry over the last two decades. Despite that, there is a scarcity of detailed information on how this virus can be transmitted. The current study aimed to establish a direct contact model using seeder chickens infected with H9N2 AIV as a source of the virus for transmission to recipient chickens. Seeder chickens were inoculated with two different inoculation routes either directly or via the aerosol route. The results indicate that inoculation via the aerosol route was more effective at establishing infection compared to the direct inoculation route. Shedding was observed to be higher in aerosol-inoculated seeder chickens, with a greater percentage of chickens being infected at each time point. In terms of transmission, the recipient chickens exposed to the aerosol-inoculated seeder chickens had higher oral and cloacal virus shedding compared to the recipient chickens of the directly inoculated group. Furthermore, the aerosol route of infection resulted in enhanced antibody responses in both seeder and recipient chickens compared to the directly inoculated group. Overall, the results confirmed that the aerosol route is a preferred inoculation route for infecting seeder chickens in a direct contact transmission model.
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Affiliation(s)
- Sugandha Raj
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada; (S.R.); (N.A.); (N.B.); (D.C.H.); (É.N.); (K.K.)
| | - Jake Astill
- Artemis Technologies Inc., Guelph, ON N1L 1E3, Canada;
| | - Nadiyah Alqazlan
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada; (S.R.); (N.A.); (N.B.); (D.C.H.); (É.N.); (K.K.)
| | - Nitish Boodhoo
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada; (S.R.); (N.A.); (N.B.); (D.C.H.); (É.N.); (K.K.)
| | - Douglas C. Hodgins
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada; (S.R.); (N.A.); (N.B.); (D.C.H.); (É.N.); (K.K.)
| | - Éva Nagy
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada; (S.R.); (N.A.); (N.B.); (D.C.H.); (É.N.); (K.K.)
| | - Samira Mubareka
- Divisions of Infectious Diseases and Microbiology, Sunnybrook Research Institute, Toronto, ON M4N 3M5, Canada;
| | - Khalil Karimi
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada; (S.R.); (N.A.); (N.B.); (D.C.H.); (É.N.); (K.K.)
| | - Shayan Sharif
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada; (S.R.); (N.A.); (N.B.); (D.C.H.); (É.N.); (K.K.)
- Correspondence:
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12
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Amin F, Mukhtar N, Aslam A, Sheikh AA, Sultan B, Hussain M, Shehzad R, Ali M, Shahid MF, Aziz MW, Azeem S, Aslam HB, Yaqub T. Rate of Multiple Viral and Bacterial CoInfection(s) in Influenza A/H9N2–Infected Broiler Flocks. Avian Dis 2022; 66:1-8. [DOI: 10.1637/aviandiseases-d-21-00114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 02/15/2022] [Indexed: 11/05/2022]
Affiliation(s)
- Faisal Amin
- Institute of Microbiology, Faculty of Veterinary Science, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan
| | - Nadia Mukhtar
- Institute of Microbiology, Faculty of Veterinary Science, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan
| | - Asim Aslam
- Department of Pathology, Faculty of Veterinary Science, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan
| | - Ali Ahmed Sheikh
- Institute of Microbiology, Faculty of Veterinary Science, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan
| | - Bakht Sultan
- GP Laboratory, Grand Parent Poultry (Pvt) Ltd., Lahore, Pakistan
| | | | - Rehman Shehzad
- School of Biochemistry and Biotechnology, University of the Punjab, Lahore, Pakistan
| | - Muzaffar Ali
- Institute of Microbiology, Faculty of Veterinary Science, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan
| | - Muhammad Furqan Shahid
- Institute of Microbiology, Faculty of Veterinary Science, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan
| | - Muhammad Waqar Aziz
- Institute of Microbiology, Faculty of Veterinary Science, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan
| | - Shahan Azeem
- Institute of Microbiology, Faculty of Veterinary Science, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan
| | - Hassaan Bin Aslam
- Institute of Microbiology, Faculty of Veterinary Science, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan
| | - Tahir Yaqub
- Institute of Microbiology, Faculty of Veterinary Science, University of Veterinary and Animal Sciences, Lahore 54000, Pakistan
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13
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Coinfection of Chickens with H9N2 and H7N9 Avian Influenza Viruses Leads to Emergence of Reassortant H9N9 Virus with Increased Fitness for Poultry and a Zoonotic Potential. J Virol 2022; 96:e0185621. [PMID: 35019727 PMCID: PMC8906417 DOI: 10.1128/jvi.01856-21] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
An H7N9 low-pathogenicity avian influenza virus (LPAIV) emerged in 2013 through genetic reassortment between H9N2 and other LPAIVs circulating in birds in China. This virus causes inapparent clinical disease in chickens, but zoonotic transmission results in severe and fatal disease in humans. To examine a natural reassortment scenario between H7N9 and G1 lineage H9N2 viruses predominant in the Indian subcontinent, we performed an experimental coinfection of chickens with A/Anhui/1/2013/H7N9 (Anhui/13) virus and A/Chicken/Pakistan/UDL-01/2008/H9N2 (UDL/08) virus. Plaque purification and genotyping of the reassortant viruses shed via the oropharynx of contact chickens showed H9N2 and H9N9 as predominant subtypes. The reassortant viruses shed by contact chickens also showed selective enrichment of polymerase genes from H9N2 virus. The viable "6+2" reassortant H9N9 (having nucleoprotein [NP] and neuraminidase [NA] from H7N9 and the remaining genes from H9N2) was successfully shed from the oropharynx of contact chickens, plus it showed an increased replication rate in human A549 cells and a significantly higher receptor binding to α2,6 and α2,3 sialoglycans compared to H9N2. The reassortant H9N9 virus also had a lower fusion pH, replicated in directly infected ferrets at similar levels compared to H7N9 and transmitted via direct contact. Ferrets exposed to H9N9 via aerosol contact were also found to be seropositive, compared to H7N9 aerosol contact ferrets. To the best of our knowledge, this is the first study demonstrating that cocirculation of H7N9 and G1 lineage H9N2 viruses could represent a threat for the generation of novel reassortant H9N9 viruses with greater virulence in poultry and a zoonotic potential. IMPORTANCE We evaluated the consequences of reassortment between the H7N9 and the contemporary H9N2 viruses of the G1 lineage that are enzootic in poultry across the Indian subcontinent and the Middle East. Coinfection of chickens with these viruses resulted in the emergence of novel reassortant H9N9 viruses with genes derived from both H9N2 and H7N9 viruses. The "6+2" reassortant H9N9 (having NP and NA from H7N9) virus was shed from contact chickens in a significantly higher proportion compared to most of the reassortant viruses, showed significantly increased replication fitness in human A549 cells, receptor binding toward human (α2,6) and avian (α2,3) sialic acid receptor analogues, and the potential to transmit via contact among ferrets. This study demonstrated the ability of viruses that already exist in nature to exchange genetic material, highlighting the potential emergence of viruses from these subtypes with zoonotic potential.
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Sikht FZ, Ducatez M, Touzani CD, Rubrum A, Webby R, El Houadfi M, Tligui NS, Camus C, Fellahi S. Avian Influenza a H9N2 Viruses in Morocco, 2018–2019. Viruses 2022; 14:v14030529. [PMID: 35336936 PMCID: PMC8954086 DOI: 10.3390/v14030529] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 02/28/2022] [Accepted: 03/02/2022] [Indexed: 02/04/2023] Open
Abstract
Low pathogenic H9N2 avian influenza (LPAI H9N2) is considered one of the most important diseases found in poultry (broiler, laying hens, breeding chickens, and turkeys). This infection causes considerable economic losses. The objective of this work was to monitor and assess the presence of avian influenza virus (AIV) H9N2 in eight different regions of Morocco using real-time RT-PCR, and to assess the phylogenetic and molecular evolution of the H9N2 viruses between 2016 and 2019. Field samples were collected from 108 farms suspected of being infected with LPAI H9N2 virus. Samples were analyzed using H9N2-specific real-time RT-PCR. Highly positive samples were subjected to virus isolation and seven isolates were fully sequenced. Low pathogenic H9N2 avian influenza virus was introduced in Morocco in 2016. We show that in 2018–2019, the virus was still present irrespective of vaccination status. Phylogenetic and molecular analyses showed mutations related to virulence, although our viruses were related to 2016 Moroccan viruses and grouped in the G1 lineage. Specific amino acid substitutions were identified in Moroccan H9N2 viruses that are believed to lead to increased resistance to antiviral drugs.
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Affiliation(s)
- Fatima-Zohra Sikht
- Avian Pathology Unit, Department of Veterinary Pathology and Public Health, Agronomy and Veterinary Institute Hassan II, Rabat B.P. 6202, Morocco; (F.-Z.S.); (C.D.T.); (M.E.H.); (S.F.)
- IHAP, Toulouse University, INRAE, ENVT, 31300 Toulouse, France;
| | | | - Charifa Drissi Touzani
- Avian Pathology Unit, Department of Veterinary Pathology and Public Health, Agronomy and Veterinary Institute Hassan II, Rabat B.P. 6202, Morocco; (F.-Z.S.); (C.D.T.); (M.E.H.); (S.F.)
| | - Adam Rubrum
- Department of Infectious Diseases, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA; (A.R.); (R.W.)
| | - Richard Webby
- Department of Infectious Diseases, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA; (A.R.); (R.W.)
| | - Mohammed El Houadfi
- Avian Pathology Unit, Department of Veterinary Pathology and Public Health, Agronomy and Veterinary Institute Hassan II, Rabat B.P. 6202, Morocco; (F.-Z.S.); (C.D.T.); (M.E.H.); (S.F.)
| | - Nour-Said Tligui
- Anatomo-Pathology Unit, Department of Veterinary Pathology and Public Health, Agronomy and Veterinary Institute Hassan II, Rabat B.P. 6202, Morocco;
| | - Christelle Camus
- IHAP, Toulouse University, INRAE, ENVT, 31300 Toulouse, France;
- Correspondence: ; Tel.: +33-5-61-19-38-80
| | - Siham Fellahi
- Avian Pathology Unit, Department of Veterinary Pathology and Public Health, Agronomy and Veterinary Institute Hassan II, Rabat B.P. 6202, Morocco; (F.-Z.S.); (C.D.T.); (M.E.H.); (S.F.)
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15
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Verma AK, Kumar M, Murugkar HV, Nagarajan S, Tosh C, Namdeo P, Singh R, Mishra S, Kombiah S, Dhanapal S, Singh VP. Experimental Infection and In-Contact Transmission of H9N2 Avian Influenza Virus in Crows. Pathogens 2022; 11:pathogens11030304. [PMID: 35335628 PMCID: PMC8955285 DOI: 10.3390/pathogens11030304] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 02/07/2022] [Accepted: 02/11/2022] [Indexed: 02/01/2023] Open
Abstract
This study aimed to investigate the potential of H9N2 avian influenza virus to cause disease and intra-species transmission in house crows (Corvus splendens). A group of six crows were intranasally inoculated with 106.0 EID50 of H9N2 virus (A/chicken/India/07OR17/2021), and 24 h post-inoculation six naïve crows were co-housed with infected crows. Crows were observed for 14 days for any overt signs of illness. Oropharyngeal and cloacal swabs were collected up to 14 days to assess virus excretion. No apparent clinical signs were observed in either infected or in-contact crows. Virus excretion was observed only in infected birds up to 9 days post-infection (dpi) through both oropharyngeal and cloacal routes. All six infected crows seroconverted to H9N2 virus at 14 dpi, whereas all in-contact crows remained negative to H9N2 virus antibodies. No virus could be isolated from tissues viz., lung, liver, kidney, pancreas, small intestine and large intestine. Although crows became infected with the H9N2 virus, transmission of the virus was inefficient to the in-contact group. However, virus excretion through oral and cloacal swabs from infected crows suggests a potential threat for inter-species transmission, including humans. Crows, being a common synanthrope species, might have some role in influenza virus transmission to poultry and humans, which needs to be explored further.
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16
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Chrzastek K, Leng J, Zakaria MK, Bialy D, La Ragione R, Shelton H. Low pathogenic avian influenza virus infection retards colon microbiota diversification in two different chicken lines. Anim Microbiome 2021; 3:64. [PMID: 34583770 PMCID: PMC8479891 DOI: 10.1186/s42523-021-00128-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 09/10/2021] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND A commensal microbiota regulates and is in turn regulated by viruses during host infection which can influence virus infectivity. In this study, analysis of colon microbiota population changes following a low pathogenicity avian influenza virus (AIV) of the H9N2 subtype infection of two different chicken breeds was conducted. METHODS Colon samples were taken from control and infected groups at various timepoints post infection. 16S rRNA sequencing on an Illumina MiSeq platform was performed on the samples and the data mapped to operational taxonomic units of bacterial using a QIIME based pipeline. Microbial community structure was then analysed in each sample by number of observed species and phylogenetic diversity of the population. RESULTS We found reduced microbiota alpha diversity in the acute period of AIV infection (day 2-3) in both Rhode Island Red and VALO chicken lines. From day 4 post infection a gradual increase in diversity of the colon microbiota was observed, but the diversity did not reach the same level as in uninfected chickens by day 10 post infection, suggesting that AIV infection retards the natural accumulation of colon microbiota diversity, which may further influence chicken health following recovery from infection. Beta diversity analysis indicated a bacterial species diversity difference between the chicken lines during and following acute influenza infection but at phylum and bacterial order level the colon microbiota dysbiosis was similar in the two different chicken breeds. CONCLUSION Our data suggest that H9N2 influenza A virus impacts the chicken colon microbiota in a predictable way that could be targeted via intervention to protect or mitigate disease.
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Affiliation(s)
| | - Joy Leng
- Department of Pathology and Infectious Disease, School of Veterinary Medicine, University of Surrey, Guildford, UK
| | - Mohammad Khalid Zakaria
- The Pirbright Institute, Pirbright, Woking, Surrey, UK
- University of Glasgow Centre for Virus Research, Glasgow, UK
| | - Dagmara Bialy
- The Pirbright Institute, Pirbright, Woking, Surrey, UK
| | - Roberto La Ragione
- Department of Pathology and Infectious Disease, School of Veterinary Medicine, University of Surrey, Guildford, UK
| | - Holly Shelton
- The Pirbright Institute, Pirbright, Woking, Surrey, UK.
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Senevirathne A, Hewawaduge C, Park S, Jawalagatti V, Kim C, Seo BJ, Lee E, Lee JH. Single oral immunization of an attenuated Salmonella Gallinarium formulation consisting of equal quantities of strains secreting H9N2 hemagglutinin-HA1, HA2, and M2eCD154 induces significant protection against H9N2 and partial protection against Salmonella Gallinarium challenge in chickens. Vet Immunol Immunopathol 2021; 240:110318. [PMID: 34479105 DOI: 10.1016/j.vetimm.2021.110318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 07/22/2021] [Accepted: 08/26/2021] [Indexed: 11/27/2022]
Abstract
The present investigation describes a formulation of a live attenuated Salmonella Gallinarium (SG) vaccine candidate against H9N2 influenza and SG infections in chickens. The formulation consists of an equal ratio of three strains, JOL2158, JOL2113, and JOL2074, which deliver hemagglutinin; HA1, HA2, and matrix protein 2 (M2e):: CD154 fusion (M2eCD154) antigens designed for broad protection against the field-matched H9N2 serotypes. The vaccine was completely safe at the average inoculation doses of 108 and 109 CFU/bird/0.2 mL in phosphate-buffered saline (PBS) used in the study. Bird immunization as a single oral inoculation could significantly engage humoral IgG, mucosal IgA, and cell-mediated immune responses against each immunized antigen, compared to the PBS control group (P < 0.05). The immunological correlates were comparable with the level of protection derived against the H9N2 and SG challenge, which resulted in significant protection against the H9N2 but only partial protection against the SG challenge as we compared against the PBS control group. The level of protection against H9N2 was investigated by determining the viral copy number and histopathological assessment of lung tissues. The results indicated a significant reduction in viral activity and recovery of lung inflammation towards the 14th-day post-challenge in a dose-dependent manner. Upon SG challenge, birds in the PBS control group experienced 100 % mortality, while 40 % and 70 % protection was observed in the SG-immunized groups for each respective dose of inoculation. The present SG-mediated immunization strategy proposes a rapid and reliable vaccine development process that can be effectively used against influenza strains such as H9N2 and holds the potential to minimize fowl typhoid caused by SG strains, mitigating two economically important diseases in the poultry industry.
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Affiliation(s)
- Amal Senevirathne
- College of Veterinary Medicine, Jeonbuk National University, Iksan Campus, 54596, Republic of Korea
| | - Chamith Hewawaduge
- College of Veterinary Medicine, Jeonbuk National University, Iksan Campus, 54596, Republic of Korea
| | - Sungwoo Park
- College of Veterinary Medicine, Jeonbuk National University, Iksan Campus, 54596, Republic of Korea
| | - Vijayakumar Jawalagatti
- College of Veterinary Medicine, Jeonbuk National University, Iksan Campus, 54596, Republic of Korea
| | - Chonghan Kim
- WOOGENE B&G CO., LTD., 07299, Seoul, Republic of Korea
| | | | - Eunhui Lee
- WOOGENE B&G CO., LTD., 07299, Seoul, Republic of Korea
| | - John Hwa Lee
- College of Veterinary Medicine, Jeonbuk National University, Iksan Campus, 54596, Republic of Korea.
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Bacillus subtilis Spore-Trained Dendritic Cells Enhance the Generation of Memory T Cells via ICAM1. Cells 2021; 10:cells10092267. [PMID: 34571913 PMCID: PMC8469252 DOI: 10.3390/cells10092267] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 08/14/2021] [Accepted: 08/16/2021] [Indexed: 11/22/2022] Open
Abstract
Immunological memory is a cardinal feature of the immune system. The intestinal mucosa is the primary exposure and entry site of infectious organisms. For an effective and long-lasting safeguard, a robust immune memory system is required, especially by the mucosal immunity. It is well known that tissue-resident memory T cells (Trms) provide a first response against infections reencountered at mucosal tissues surfaces, where they accelerate pathogen clearance. However, their function in intestinal immunization remains to be investigated. Here, we report enhanced local mucosal and systemic immune responses through oral administration of H9N2 influenza whole inactivated virus (H9N2 WIV) plus Bacillus subtilis spores. Subsequently, H9N2 WIV plus spores led to the generation of CD103+ CD69+ Trms, which were independent of circulating T cells during the immune period. Meanwhile, we also found that Bacillus subtilis spores could stimulate Acrp30 expression in 3T3-L1 adipocytes. Moreover, spore-stimulated adipocyte supernatant also upregulated the expression of intercellular adhesion molecule-1 (ICAM1) in dendritic cells (DCs). Furthermore, the proportion of HA-tetramer+ cells was severely curtailed upon suppressed ICAM1 expression, which also depended on HA-loaded DCs. Taken together, our data demonstrated that spore-promoted H9N2 WIV induced an immune response by enhancing Trms populations, which were associated with the activation of ICAM1 in DCs.
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Arafat N, Abd El Rahman S, Naguib D, El-Shafei RA, Abdo W, Eladl AH. Co-infection of Salmonella enteritidis with H9N2 avian influenza virus in chickens. Avian Pathol 2021; 49:496-506. [PMID: 32835500 DOI: 10.1080/03079457.2020.1778162] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Salmonella and avian influenza virus are important pathogens affecting the poultry industry and human health worldwide. In this experimental study, we evaluated the consequences of co-infection of Salmonella enteritidis (SE) with H9N2 avian influenza virus (H9N2-AIV) in chickens. Four groups were included: control group, H9N2-AIV group, H9N2-AIV + SE group, and SE group. Infected chickens were intranasally inoculated with H9N2-AIV at 21 days of age and then orally administered SE on the same day. The birds were monitored for clinical signs, mortality rates, and alterations in body weight. Sera, intestinal fluids, oropharyngeal, and cloacal swabs, and tissue samples were collected at 2, 6, 10, and 14 days post-infection (dpi). Significant increases in clinical signs and mortality rates were observed in the H9N2-AIV + SE group. Moreover, chickens with co-infection showed a significant change in body weight. SE faecal shedding and organ colonization were significantly higher in the H9N2-AIV + SE group than in the SE group. H9N2-AIV infection compromised the systemic and mucosal immunity against SE, as evidenced by a significant decrease in lymphoid organ indices as well as systemic antibody and intestinal immunoglobulin A (IgA) responses to SE and a significant increase in splenic and bursal lesion scores. Moreover, SE infection significantly increased shedding titres and duration of H9N2-AIV. In conclusion, this is the first report of co-infection of SE with H9N2-AIV in chickens, which leads to increased pathogenicity, SE faecal shedding and organ colonization, and H9N2-AIV shedding titre and duration, resulting in substantial economic losses and environmental contamination, ultimately leading to increased zoonoses.
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Affiliation(s)
- Nagah Arafat
- Department of Poultry Diseases, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Sahar Abd El Rahman
- Department of Virology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Doaa Naguib
- Department of Hygiene and Zoonoses, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Reham A El-Shafei
- Department of Pharmacology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Walied Abdo
- Department of Pathology, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafrelsheikh, Egypt
| | - Abdelfattah H Eladl
- Department of Poultry Diseases, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
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A Review of Avian Influenza A Virus Associations in Synanthropic Birds. Viruses 2020; 12:v12111209. [PMID: 33114239 PMCID: PMC7690888 DOI: 10.3390/v12111209] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 10/20/2020] [Accepted: 10/21/2020] [Indexed: 12/20/2022] Open
Abstract
Avian influenza A viruses (IAV) have received significant attention due to the threat they pose to human, livestock, and wildlife health. In this review, we focus on what is known about IAV dynamics in less common avian species that may play a role in trafficking IAVs to poultry operations. Specifically, we focus on synanthropic bird species. Synanthropic species, otherwise known as peridomestic, are species that are ecologically associated with humans and anthropogenically modified landscapes, such as agricultural and urban areas. Aquatic birds such as waterfowl and shorebirds are the species most commonly associated with avian IAVs, and are generally considered the reservoir or maintenance hosts in the natural ecology of these viruses. Waterfowl and shorebirds are occasionally associated with poultry facilities, but are uncommon or absent in many areas, especially large commercial operations. In these cases, spillover hosts that share resources with both maintenance hosts and target hosts such as poultry may play an important role in introducing wild bird viruses onto farms. Consequently, our focus here is on what is known about IAV dynamics in synanthropic hosts that are commonly found on both farms and in nearby habitats, such as fields, lakes, wetlands, or riparian areas occupied by waterfowl or shorebirds.
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21
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Clements AL, Sealy JE, Peacock TP, Sadeyen JR, Hussain S, Lycett SJ, Shelton H, Digard P, Iqbal M. Contribution of Segment 3 to the Acquisition of Virulence in Contemporary H9N2 Avian Influenza Viruses. J Virol 2020; 94:e01173-20. [PMID: 32727875 PMCID: PMC7527061 DOI: 10.1128/jvi.01173-20] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 07/27/2020] [Indexed: 12/16/2022] Open
Abstract
H9N2 avian influenza viruses (AIVs) circulate in poultry throughout much of Asia, the Middle East, and Africa. These viruses cause huge economic damage to poultry production systems and pose a zoonotic threat both in their own right and in the generation of novel zoonotic viruses, for example, H7N9. In recent years, it has been observed that H9N2 viruses have further adapted to gallinaceous poultry, becoming more highly transmissible and causing higher morbidity and mortality. Here, we investigate the molecular basis for this increased virulence, comparing a virus from the 1990s and a contemporary field strain. The modern virus replicated to higher titers in various systems, and this difference mapped to a single amino acid polymorphism at position 26 of the endonuclease domain shared by the PA and PA-X proteins. This change was responsible for increased replication and higher morbidity and mortality rates along with extended tissue tropism seen in chickens. Although the PA K26E change correlated with increased host cell shutoff activity of the PA-X protein in vitro, it could not be overridden by frameshift site mutations that block PA-X expression and therefore increased PA-X activity could not explain the differences in replication phenotype. Instead, this indicates that these differences are due to subtle effects on PA function. This work gives insight into the ongoing evolution and poultry adaptation of H9N2 and other avian influenza viruses and helps us understand the striking morbidity and mortality rates in the field, as well as the rapidly expanding geographical range seen in these viruses.IMPORTANCE Avian influenza viruses, such as H9N2, cause huge economic damage to poultry production worldwide and are additionally considered potential pandemic threats. Understanding how these viruses evolve in their natural hosts is key to effective control strategies. In the Middle East and South Asia, an older H9N2 virus strain has been replaced by a new reassortant strain with greater fitness. Here, we take representative viruses and investigate the genetic basis for this "fitness." A single mutation in the virus was responsible for greater fitness, enabling high growth of the contemporary H9N2 virus in cells, as well as in chickens. The genetic mutation that modulates this change is within the viral PA protein, a part of the virus polymerase gene that contributes to viral replication as well as to virus accessory functions-however, we find that the fitness effect is specifically due to changes in the protein polymerase activity.
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Affiliation(s)
- Anabel L Clements
- The Pirbright Institute, Pirbright, Woking, United Kingdom
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, United Kingdom
| | - Joshua E Sealy
- The Pirbright Institute, Pirbright, Woking, United Kingdom
| | - Thomas P Peacock
- The Pirbright Institute, Pirbright, Woking, United Kingdom
- Department of Infectious Diseases, Imperial College London, United Kingdom
| | | | - Saira Hussain
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, United Kingdom
| | - Samantha J Lycett
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, United Kingdom
| | - Holly Shelton
- The Pirbright Institute, Pirbright, Woking, United Kingdom
| | - Paul Digard
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, United Kingdom
| | - Munir Iqbal
- The Pirbright Institute, Pirbright, Woking, United Kingdom
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22
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Kumosani T, Yaghmoor S, Abdulaal WH, Barbour E. Evaluation in broilers of aerosolized nanoparticles vaccine encapsulating imuno-stimulant and antigens of avian influenza virus/Mycoplasma gallisepticum. BMC Vet Res 2020; 16:319. [PMID: 32867774 PMCID: PMC7457747 DOI: 10.1186/s12917-020-02539-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Accepted: 08/24/2020] [Indexed: 11/30/2022] Open
Abstract
Background The global prevalence of economic primary infection of poultry by H9N2 virus, including the Lineage A, panzootic group ME1, and associated with secondary infection by Mycoplasma gallisepticum (MG), is alarming to the sustainability of the poultry sector. This research evaluated in broilers the immunity and protection induced by aerosolization of liposomal nanoparticles vaccine, encapsulating antigens of H9N2 virus and MG, with or without the incorporation of Echinacea extract (EE) immuno-stimulant. Six different treatments (TRTs) of broilers were included in the experimental design, with three replicate pens/TRT and stocking of 20 day-old birds/replicate. Results The tracheobronchial washings of birds subjected to aerosolization of liposomal nanoparticles, encapsulating antigens of H9N2 and MG and EE had the highest significant mean levels of each of IgA and IgG specific to H9N2 and MG, associated with lowest tracheal MG colonization, tracheal H9N2 recovery, tracheal histopathologic lesions, mortality, and best performance in body weight and feed conversion compared to all other challenged birds allocated to different treatments (P < 0.05). However, the control broilers, free from challenge with MG and H9N2, had the lowest mortality and tracheal lesions, and the highest production performance. Conclusion The aerosolization of liposomal nanoparticles, encapsulating antigens of H9N2 and MG and EE resulted in enough local immunity for protection of broilers against infection, and in attaining the highest production performance in challenged birds. The potential implication of vaccinating with safe killed nanoparticle vaccines is of utmost importance to the global poultry sector.
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Affiliation(s)
- Taha Kumosani
- Department of Biochemistry, Faculty of Science, Experimental Biochemistry Unit, King Fahd Medical Research Center and Production of Bioproducts for Industrial Applications Research Group, King Abdulaziz University (KAU), Jeddah, Kingdom of Saudi Arabia.
| | - Soonham Yaghmoor
- Experimental Biochemistry Unit, King Fahd Medical Research Center and Production of Bioproducts for Industrial Applications Research Group, KAU, Jeddah, Kingdom of Saudi Arabia
| | - Wesam H Abdulaal
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia
| | - Elie Barbour
- Adjunct to Department of Biochemistry, Faculty of Science, KAU, Jeddah, Kingdom of Saudi Arabia.,Director of R and D Department, Opticon Hygiene Consulting, Oechsli 7, 8807, Freienbach, Switzerland
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Arbi M, Souiai O, Rego N, Larbi I, Naya H, Ghram A, Houimel M. Historical origins and zoonotic potential of avian influenza virus H9N2 in Tunisia revealed by Bayesian analysis and molecular characterization. Arch Virol 2020; 165:1527-1540. [PMID: 32335769 DOI: 10.1007/s00705-020-04624-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 03/24/2020] [Indexed: 01/08/2023]
Abstract
During 2009-2012, several outbreaks of avian influenza virus H9N2 were reported in Tunisian poultry. The circulating strains carried in their hemagglutinins the human-like marker 226L, which is known to be important for avian-to-human viral transmission. To investigate the origins and zoonotic potential of the Tunisian H9N2 viruses, five new isolates were identified during 2012-2016 and their whole genomes were sequenced. Bayesian-based phylogeny showed that the HA, NA, M and NP segments belong to the G1-like lineage. The PB1, PB2, PA and NS segments appeared to have undergone multiple intersubtype reassortments and to be only distantly related to all of the Eurasian lineages (G1-like, Y280-like and Korean-like). The spatiotemporal dynamic of virus spread revealed that the H9N2 virus was transferred to Tunisia from the UAE through Asian and European pathways. As indicated by Bayesian analysis of host traits, ducks and terrestrial birds played an important role in virus transmission to Tunisia. The subtype phylodynamics showed that the history of the PB1 and PB2 segments was marked by intersubtype reassortments with H4N6, H10N4 and H2N2 subtypes. Most of these transitions between locations, hosts and subtypes were statistically supported (BF > 3) and not influenced by sampling bias. Evidence of genetic evolution was observed in the predicted amino acid sequences of the viral proteins of recent Tunisian H9N2 viruses, which were characterized by the acquisition of new mutations involved in virus adaptation to avian and mammalian hosts and amantadine resistance. This study is the first comprehensive analysis of the evolutionary history of Tunisian H9N2 viruses and highlights the zoonotic risk associated with their circulation in poultry, indicating the need for continuous surveillance of their molecular evolution.
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Affiliation(s)
- Marwa Arbi
- Laboratory of Epidemiology and Veterinary Microbiology, LR19IPT03, Institut Pasteur de Tunis, University Tunis El Manar, 13, Place Pasteur, BP74, 1002, Tunis, Belvedere, Tunisia
| | - Oussema Souiai
- Laboratory of Bioinformatics, Biomathematics and Biostatistics, LR16IPT09, Institut Pasteur de Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Natalia Rego
- Bioinformatics Unit, Institut Pasteur de Montevideo, Mataojo 2020, 11400, Montevideo, Uruguay
| | - Imen Larbi
- Laboratory of Epidemiology and Veterinary Microbiology, LR19IPT03, Institut Pasteur de Tunis, University Tunis El Manar, 13, Place Pasteur, BP74, 1002, Tunis, Belvedere, Tunisia
| | - Hugo Naya
- Bioinformatics Unit, Institut Pasteur de Montevideo, Mataojo 2020, 11400, Montevideo, Uruguay
- Departmento de Producción Animal y Pasturas, Facultad de Agronomía, Universidad de la República, Av. Gral. Eugenio Garzón 780, 12900, Montevideo, Uruguay
| | - Abdeljelil Ghram
- Laboratory of Epidemiology and Veterinary Microbiology, LR19IPT03, Institut Pasteur de Tunis, University Tunis El Manar, 13, Place Pasteur, BP74, 1002, Tunis, Belvedere, Tunisia
| | - Mehdi Houimel
- Laboratory of Epidemiology and Veterinary Microbiology, LR19IPT03, Institut Pasteur de Tunis, University Tunis El Manar, 13, Place Pasteur, BP74, 1002, Tunis, Belvedere, Tunisia.
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Eladl AH, Mosad SM, El-Shafei RA, Saleh RM, Ali HS, Badawy BM, Elshal MF. Immunostimulant effect of a mixed herbal extract on infectious bursal disease virus (IBDV) vaccinated chickens in the context of a co-infection model of avian influenza virus H9N2 and IBDV. Comp Immunol Microbiol Infect Dis 2020; 72:101505. [PMID: 32563798 DOI: 10.1016/j.cimid.2020.101505] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 06/01/2020] [Accepted: 06/02/2020] [Indexed: 02/07/2023]
Abstract
This study was conducted to assess the comparative effects of a mixed herbal extract (MHE) containing Ocimum sanctum, Withania somnifera, Emblica officinalis, Tinospora cordifolia, Mangifera indica, and Asphaltum (shilajit) on infectious bursal disease virus (IBDV)-vaccinated (VAC) chickens infected with IBDV and avian influenza virus (AIV) H9N2. The experiment included three groups (G1-G3): G1, the negative control group; G2, the VAC + challenged (Ch) group; and G3, the VAC + Ch + MHE group. MHE was orally administered continuously for 5 weeks post-vaccination (PV) with IBDV at 12 days of age, and the chicks were simultaneously challenged with virulent IBDV (intraocularly) and AIV H9N2 (intranasally) at 21 days PV. Blood and tissue samples as well as tracheal and cloacal swabs were gathered at different times PV and post-challenge. Immunological and haematological parameters, histopathological lesions, relative organ weights and final live weights revealed significant differences (P ≤ 0.05) between G2 and G3 groups. Furthermore, in the G3 group, the protection rates, ELISA and HI titers and CD4+/CD8+ ratio were significantly increased, whereas viral shedding titers and the heterophil/lymphocyte ratio were decreased. In conclusion, the oral administration of the mixed herbal extract for 5 weeks can stimulate the immune response to IBDV vaccination and relieves the pathogenicity of an AIV H9N2 and IBDV co-infection in chickens.
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Affiliation(s)
- Abdelfattah H Eladl
- Department of Poultry Diseases, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt.
| | - Samah M Mosad
- Department of Virology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Reham A El-Shafei
- Department of Pharmacology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Rasha M Saleh
- Department of Physiology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Hanaa S Ali
- Department of Pathology, Animal Health Research Institute, Mansoura Branch, Egypt
| | - Basma M Badawy
- Department of Hygiene and Zoonoses, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Mohamed F Elshal
- Department of Molecular Biology, Genetic Engineering and Biotechnology Institute, University of Sadat City, Egypt
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25
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Lukosaityte D, Sadeyen JR, Shrestha A, Sealy JE, Bhat S, Chang P, Digard P, Iqbal M. Engineered Recombinant Single Chain Variable Fragment of Monoclonal Antibody Provides Protection to Chickens Infected with H9N2 Avian Influenza. Vaccines (Basel) 2020; 8:vaccines8010118. [PMID: 32138253 PMCID: PMC7157677 DOI: 10.3390/vaccines8010118] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 02/28/2020] [Accepted: 03/01/2020] [Indexed: 12/31/2022] Open
Abstract
Passive immunisation with neutralising antibodies can be a potent therapeutic strategy if used pre- or post-exposure to a variety of pathogens. Herein, we investigated whether recombinant monoclonal antibodies (mAbs) could be used to protect chickens against avian influenza. Avian influenza viruses impose a significant economic burden on the poultry industry and pose a zoonotic infection risk for public health worldwide. Traditional control measures including vaccination do not provide rapid protection from disease, highlighting the need for alternative disease mitigation measures. In this study, previously generated neutralizing anti-H9N2 virus monoclonal antibodies were converted to single-chain variable fragment antibodies (scFvs). These recombinant scFv antibodies were produced in insect cell cultures and the preparations retained neutralization capacity against an H9N2 virus in vitro. To evaluate recombinant scFv antibody efficacy in vivo, chickens were passively immunized with scFvs one day before, and for seven days after virus challenge. Groups receiving scFv treatment showed partial virus load reductions measured by plaque assays and decreased disease manifestation. These results indicate that antibody therapy could reduce clinical disease and shedding of avian influenza virus in infected chicken flocks.
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Affiliation(s)
- Deimante Lukosaityte
- The Pirbright Institute, Pirbright, Woking GU24 0NF, UK; (D.L.); (J.-R.S.); (A.S.); (J.E.S.); (S.B.); (P.C.)
| | - Jean-Remy Sadeyen
- The Pirbright Institute, Pirbright, Woking GU24 0NF, UK; (D.L.); (J.-R.S.); (A.S.); (J.E.S.); (S.B.); (P.C.)
| | - Angita Shrestha
- The Pirbright Institute, Pirbright, Woking GU24 0NF, UK; (D.L.); (J.-R.S.); (A.S.); (J.E.S.); (S.B.); (P.C.)
| | - Joshua E. Sealy
- The Pirbright Institute, Pirbright, Woking GU24 0NF, UK; (D.L.); (J.-R.S.); (A.S.); (J.E.S.); (S.B.); (P.C.)
| | - Sushant Bhat
- The Pirbright Institute, Pirbright, Woking GU24 0NF, UK; (D.L.); (J.-R.S.); (A.S.); (J.E.S.); (S.B.); (P.C.)
| | - Pengxiang Chang
- The Pirbright Institute, Pirbright, Woking GU24 0NF, UK; (D.L.); (J.-R.S.); (A.S.); (J.E.S.); (S.B.); (P.C.)
| | - Paul Digard
- The Roslin Institute, University of Edinburgh, Easter Bush, Midlothian EH25 9RG, UK;
| | - Munir Iqbal
- The Pirbright Institute, Pirbright, Woking GU24 0NF, UK; (D.L.); (J.-R.S.); (A.S.); (J.E.S.); (S.B.); (P.C.)
- Correspondence:
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26
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Awadin WF, Eladl AH, El-Shafei RA, El-Adl MA, Aziza AE, Ali HS, Saif MA. Effect of omega-3 rich diet on the response of Japanese quails (Coturnix coturnix japonica) infected with Newcastle disease virus or avian influenza virus H9N2. Comp Biochem Physiol C Toxicol Pharmacol 2020; 228:108668. [PMID: 31712184 DOI: 10.1016/j.cbpc.2019.108668] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Revised: 10/25/2019] [Accepted: 11/05/2019] [Indexed: 10/25/2022]
Abstract
This study was performed to evaluate the effects of omega-3 supplementation on growth performance, clinical signs, post-mortem lesions, haemagglutination inhibition (HI) antibody titres, gene expression and histopathology in quails (Coturnix coturnix japonica) infected with Newcastle disease virus (NDV) and avian influenza virus (AIV) H9N2. One hundred, 40-day-old male quails were divided into 5 groups: G1, fed a control basal diet; G2A, infected with NDV; G2B, infected with H9N2; G3A, infected with NDV and given omega-3, and G3B, infected with H9N2 and given omega-3. The dietary omega-3 supplementation was continued for 4 weeks: two weeks before infection and two weeks after intranasal infection with virulent NDV and AIV H9N2. Our results revealed significant differences (P < 0.05) in growth performance, HI antibody titres, clinical signs, post-mortem lesions, mortality, viral shedding rates, immunological parameters, and histopathological lesions between the treated (G3A and G3B) and untreated (G2A and G2B) groups. In conclusion, dietary omega-3 supplementation for 4 weeks can improve growth performance and alleviate the deleterious immunological and pathological effects of NDV and AIV H9N2 infection in quails.
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Affiliation(s)
- Walaa F Awadin
- Department of Pathology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Abdelfattah H Eladl
- Department of Poultry Diseases, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Reham A El-Shafei
- Department of Pharmacology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt.
| | - Mohamed A El-Adl
- Department of Biochemistry, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Abeer E Aziza
- Department of Nutrition, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Hanaa S Ali
- Department of Pathology, Animal Health Research Institute, Mansoura branch, Egypt
| | - Mohamed A Saif
- Researcher of Virology, Reference Laboratory of Quality Control of Poultry Production (Gamasa)- Animal Health Research Institute, Egypt
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27
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Eladl AH, Arafat N, El-Shafei RA, Farag VM, Saleh RM, Awadin WF. Comparative immune response and pathogenicity of the H9N2 avian influenza virus after administration of Immulant ®, based on Echinacea and Nigella sativa, in stressed chickens. Comp Immunol Microbiol Infect Dis 2019; 65:165-175. [PMID: 31300109 DOI: 10.1016/j.cimid.2019.05.017] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 05/14/2019] [Accepted: 05/15/2019] [Indexed: 12/21/2022]
Abstract
Avian influenza vaccines are commonly used in the poultry industry, and some medicinal plants can increase the efficacy of such vaccines. The objective of this study was to evaluate the effect of Immulant® (IMU) (a commercial product based on Echinacea and Nigella sativa) on stress induced by dexamethasone (DEX) in chickens vaccinated (VAC) against the H9N2 avian influenza virus (AIV-H9N2). Seven experimental groups were included: the negative control, VAC, DEX, VAC + DEX, VAC + DEX + IMU, VAC + IMU and IMU groups. The vaccinated chickens (at 10 days of age) were injected daily with DEX for three days pre-vaccination and for three days pre-challenge and orally administered 1% IMU for 6 weeks post-vaccination (PV). The chickens were then challenged intranasally with AIV-H9N2 at 28 days PV. Serum, blood, tracheal and cloacal swabs and tissue samples were collected in the 1st and 4th weeks PV and at different time points post-challenge. The results showed significant changes (P ≤ 0.05) in oxidative stress and antioxidant biomarkers (malondialdehyde, nitric oxide and reduced glutathione), haematological and immunological parameters, final live weights, relative organ weights and histopathological lesions between the VAC+DEX group and the VAC group. Moreover, IMU significantly increased protection rates post-challenge, HI antibody titers and heterophil phagocytic activity and decreased DEX-induced stress and virus shedding titers. In conclusion, oral administration of 1% IMU for six weeks can enhance the immune response after AI-H9N2 vaccination and reduce the pathogenicity of infection in stressed chickens.
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Affiliation(s)
- Abdelfattah H Eladl
- Department of Poultry Diseases, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt.
| | - Nagah Arafat
- Department of Poultry Diseases, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Reham A El-Shafei
- Department of Pharmacology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Verginia M Farag
- Department of Clinical Pathology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Rasha M Saleh
- Department of Physiology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Walaa F Awadin
- Department of Pathology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
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28
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Eladl AH, Alzayat AA, Ali HS, Fahmy HA, Ellakany HF. Comparative molecular characterization, pathogenicity and seroprevalence of avian influenza virus H9N2 in commercial and backyard poultry flocks. Comp Immunol Microbiol Infect Dis 2019; 64:81-89. [PMID: 31174705 DOI: 10.1016/j.cimid.2019.02.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 02/24/2019] [Accepted: 02/26/2019] [Indexed: 10/27/2022]
Abstract
This study was conducted to perform the comparative molecular characterization of avian influenza virus (AIV) H9N2, pathogenicity and seroprevalence in commercial and backyard poultry flocks. Fifty commercial poultry flocks were investigated between 2012 and 2015. Eighteen flocks (36%) out of 50 were positive HA. Seven (38.9%) out of 18 were positive by chromatographic strip test for AI common antigen. By Real-time RT-PCR, only two flocks were positive H9. The molecular characterization of two different AI-H9N2 viruses, one isolated from a broiler flock (A/chicken/Egypt/Mansoura-18/2013) and the other from a layer flock (A/chicken/Egypt/Mansoura-36/2015) was conducted on HA gene. Moreover, a higher seroprevalence, using the broiler strain as a known antigen, was shown in backyard chicken flocks 15/26 (57.7%) than duck flocks 9/74 (12.2%). Interestingly, the pathogenicity index (PI) of the H9N2 broiler strain in inoculated experimental chickens ranged from 1.2 (oculonasal route) to 1.9 (Intravenous route). The PI indicated a highly pathogenic effect, with high mortality (up to 100%) in the inoculated chickens correlated with the high mortality (80%) in the flock where the virus was isolated. The firstly recorded clinical signs, including cyanosis in the combs and wattles and subcutaneous haemorrhages in the leg shanks and lesions, as well as histopathology and immunohistochemistry, revealed a systemic infection of the high pathogenicity with the H9N2 virus. Conversely, the H9N2 layer strain showed a low pathogenicity. In conclusion, as a first report, the molecular analysis and pathogenicity of the tested strains confirmed the presence of a high pathogenicity AIV-H9N2 with systemic infections.
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Affiliation(s)
- Abdelfattah H Eladl
- Department of Poultry Diseases, Faculty of Veterinary Medicine, Mansoura University, Egypt.
| | - Asmaa A Alzayat
- Department of Poultry Diseases, Animal Health Research Institute, Mansoura branch, Egypt
| | - Hanaa S Ali
- Department of Pathology, Animal Health Research Institute, Mansoura branch, Egypt
| | - Hanan A Fahmy
- Department of Biotechnology, Animal Health Research Institute, Dokki, Egypt
| | - Hany F Ellakany
- Department of Poultry Diseases, Faculty of Veterinary Medicine, Damanhour University, Egypt
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Boumart Z, Bamouh Z, Jazouli M, Zecchin B, Fusaro A, Salviato A, Monne I, Tadlaoui KO, Harrak ME. Pathogenicity and Full Genome Sequencing of the Avian Influenza H9N2 Moroccan Isolate 2016. Avian Dis 2019; 63:24-30. [PMID: 31251516 DOI: 10.1637/11941-080418-reg.1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 10/26/2018] [Indexed: 11/05/2022]
Abstract
In Morocco in early 2016, a low pathogenic avian influenza virus serotype H9N2 caused large economic losses to the poultry industry, with specific clinical symptoms and high mortality rates on infected farms. Subsequent to the H9N2 outbreak, the causal agent was successfully isolated from chicken flocks with high morbidity and mortality rates, propagated on embryonated eggs, and fully sequenced. The phylogenetic analysis suggested that the Moroccan isolate could have derived from the Middle East isolate A/chicken/Dubai/D2506.A/2015. This study was designed to assess the pathogenicity of the Moroccan isolate H9N2 in experimentally infected broiler and specific-pathogen-free (SPF) chickens. At 22 days of age, one broiler and two SPF chicken groups were inoculated by dropping 0.2 ml of the H9N2 isolate (107.5 EID50/ml) in both nostrils and eyes. Clinically inoculated chickens with H9N2 displayed mild lesions, low mortality rates, and an absence of clinical signs. The H9N2 virus was more pathogenic in broiler chickens and produced more severe tissue lesions compared to SPF chickens. The viral shedding was detected up to 6 days postinoculation (pi) in oropharyngeal and cloacal swabs in infected birds with a maximum shedding in the oropharynges of the broiler group. All experimental chickens seroconverted and registered high hemagglutination inhibition titers as early as day 7 pi. The present study indicates that the H9N2 virus isolated from a natural outbreak was of low pathogenicity under experimental conditions. However, under field conditions infection with other pathogens might have aggravated the disease.
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Affiliation(s)
- Zineb Boumart
- Research and Development Department, Multi-Chemical Industry, Lot 157, Z I, Sud-Ouest (ERAC) B. P. 278, Mohammedia 28810, Morocco,
| | - Zahra Bamouh
- Research and Development Department, Multi-Chemical Industry, Lot 157, Z I, Sud-Ouest (ERAC) B. P. 278, Mohammedia 28810, Morocco
| | - Mohammed Jazouli
- Research and Development Department, Multi-Chemical Industry, Lot 157, Z I, Sud-Ouest (ERAC) B. P. 278, Mohammedia 28810, Morocco
| | - Bianca Zecchin
- Istituto Zooprofilattico Sperimentale delle Venezie, Padua, Italy
| | - Alice Fusaro
- Istituto Zooprofilattico Sperimentale delle Venezie, Padua, Italy
| | | | - Isabella Monne
- Istituto Zooprofilattico Sperimentale delle Venezie, Padua, Italy
| | - Khalid Omari Tadlaoui
- Research and Development Department, Multi-Chemical Industry, Lot 157, Z I, Sud-Ouest (ERAC) B. P. 278, Mohammedia 28810, Morocco
| | - Mehdi El Harrak
- Research and Development Department, Multi-Chemical Industry, Lot 157, Z I, Sud-Ouest (ERAC) B. P. 278, Mohammedia 28810, Morocco
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Awadin WF, Eladl AH, El-Shafei RA, El-Adl MA, Ali HS. Immunological and pathological effects of vitamin E with Fetomune Plus ® on chickens experimentally infected with avian influenza virus H9N2. Vet Microbiol 2019; 231:24-32. [PMID: 30955817 DOI: 10.1016/j.vetmic.2019.02.028] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 02/19/2019] [Accepted: 02/19/2019] [Indexed: 11/19/2022]
Abstract
Avian influenza virus (AIV) H9N2 infection causes economic losses on poultry farms, and immunostimulants are essential for improving chicken immunity. This study evaluated the immunological and pathological effects of vitamin E with Fetomune Plus® (a commercial product based on a yeast extract and vitamins) on chickens experimentally infected with AIV H9N2. Three groups of white Hy-Line chicks were included. The G1 group was kept as an uninfected untreated control, the G2 group was intranasally infected with the AIV H9N2 strain (0.5 ml of 106 50% egg infectious dose (EID50)), and the G3 group was infected and treated with vitamin E (200 mg/kg of diet) and Fetomune Plus® (1 ml/liter of drinking water) for four weeks. The gene expression of interferon-gamma (IFN-γ), interleukin (IL)-6, and IL-2 was determined at 3, 5 and 7 days post-infection (PI). Virus shedding titers and rates and haemagglutination inhibition (HI) antibody titers were detected. Clinical signs, mortalities and post-mortem lesions were recorded. The birds were weighed, and relative organ weights were calculated. Tissue specimens were taken for histopathological examination and immunohistochemistry (IHC). The expression of IFN-γ in the duodenum revealed a significant increase in G2 compared to G3 at 3 days PI, while the duodenal and splenic expression of IL-6 was significantly increased in G2 compared to G3 at 5 days PI. IL-2 was overexpressed in the duodenum in G3 compared to G2 at 3 and 5 days PI. A significant decrease (P ≤ 0.05) in the virus shedding titer and an increase in the HI titers were detected in G3 compared to G2. The clinical signs and the mortality rate were clearly appeared in G2 than in G3. By IHC, lower H9N2 staining intensity was observed in the examined organs from G3 than in those from G2. In conclusion, as a first report, vitamin E with Fetomune Plus® supplementation for four weeks could improve the immunological and pathological effects of H9N2 infection on chickens.
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Affiliation(s)
- Walaa F Awadin
- Department of Pathology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Abdelfattah H Eladl
- Department of Poultry Diseases, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt.
| | - Reham A El-Shafei
- Department of Pharmacology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Mohamed A El-Adl
- Department of Biochemistry and Chemistry of Nutrition, Faculty of Veterinary Medicine, Mansoura University, Egypt
| | - Hanaa S Ali
- Department of Pathology, Animal Health Research Institute, Mansoura branch, Egypt
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Yitbarek A, Weese JS, Alkie TN, Parkinson J, Sharif S. Influenza A virus subtype H9N2 infection disrupts the composition of intestinal microbiota of chickens. FEMS Microbiol Ecol 2019; 94:4705883. [PMID: 29228270 DOI: 10.1093/femsec/fix165] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Accepted: 11/30/2017] [Indexed: 12/26/2022] Open
Abstract
The impact of low pathogenic influenza viruses such as subtype H9N2, which infect the respiratory and the gastrointestinal tracts of chickens, on microbial composition are not known. Twenty-day-old specific pathogen-free chickens were assigned to two treatment groups, control (uninfected) and H9N2-infected (challenged via the oral-nasal route). Fecal genomic DNA was extracted, and the V3-V4 regions of the 16S rRNA gene were sequenced using the Illumina Miseq® platform. Sequences were curated using Mothur as described in the MiSeq SOP. Infection of chickens with H9N2 resulted in an increase in phylum Proteobacteria, and differential enrichment with the genera Vampirovibrio, Pseudoflavonifractor, Ruminococcus, Clostridium cluster XIVb and Isobaculum while control chickens were differentially enriched with genera Novosphingobium, Sphingomonas, Bradyrhizobium and Bifidobacterium. Analysis of pre- and post-H9N2 infection of the same chickens showed that, before infection, the fecal microbiota was characterized by Lachnospiracea and Ruminococcaceae family and the genera Clostridium sensu stricto, Roseburia and Lachnospiraceae incertae sedis. However, post-H9N2 infection, class Deltaproteobacteria, orders Clostridiales and Bacteroidiales and the genus Alistipes were differentially enriched. Findings from the current study show that influenza virus infection in chickens results in the shift of the gut microbiota, and the disruption of the host-microbial homeostasis in the gut might be one of the mechanisms by which influenza virus infection is established in chickens.
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Affiliation(s)
- Alexander Yitbarek
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - J Scott Weese
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Tamiru Negash Alkie
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - John Parkinson
- Department of Computer Science, University of Toronto, Toronto, Ontario M5S 3G4, Canada.,Division of Molecular Structure and Function, Research Institute, Hospital for Sick Children, Toronto, Ontario M5G 1X8, Canada.,Departments of Biochemistry and Molecular Genetics, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Shayan Sharif
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1, Canada
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Im SP, Kim J, Lee JS, Kim SW, Jung JW, Lazarte JMS, Kim JY, Kim YR, Lee JH, Chong RSM, Jung TS. Potential Use of Genetically Engineered Variable Lymphocyte Receptor B Specific to Avian Influenza Virus H9N2. THE JOURNAL OF IMMUNOLOGY 2018; 201:3119-3128. [PMID: 30333123 DOI: 10.4049/jimmunol.1800981] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Accepted: 09/06/2018] [Indexed: 12/13/2022]
Abstract
The variable lymphocyte receptor (VLR) B of jawless vertebrates functions as a secreted Ab of jawed vertebrates and has emerged as an alternative Ab with a single polypeptide chain. After observing an upregulated VLRB response in hagfish immunized with avian influenza virus (AIV) subtype H9N2, we screened AIV H9N2-specific VLRB using a mammalian expression system. To improve the binding avidity of the Ag-specific VLRB to the Ag, we enabled multimerization of the VLRB by conjugating it with C-terminal domain of human C4b-binding protein. To dramatically enhance the expression and secretion of the Ag-specific VLRB, we introduced a glycine-serine linker and the murine Ig κ leader sequence. The practical use of the Ag-specific VLRB was also demonstrated through various immunoassays, detected by anti-VLRB Ab (11G5). Finally, we found that the Ag-specific VLRB decreased the infectivity of AIV H9N2. Together, our findings suggest that the generated Ag-specific VLRB could be used for various immunoapplications.
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Affiliation(s)
- Se Pyeong Im
- Laboratory of Aquatic Animal Diseases, Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University, Jinju, Gyeongnam 660-701, South Korea
| | - Jaesung Kim
- Laboratory of Aquatic Animal Diseases, Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University, Jinju, Gyeongnam 660-701, South Korea
| | - Jung Seok Lee
- Laboratory of Aquatic Animal Diseases, Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University, Jinju, Gyeongnam 660-701, South Korea
| | - Si Won Kim
- Laboratory of Aquatic Animal Diseases, Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University, Jinju, Gyeongnam 660-701, South Korea
| | - Jae Wook Jung
- Laboratory of Aquatic Animal Diseases, Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University, Jinju, Gyeongnam 660-701, South Korea
| | - Jassy Mary S Lazarte
- Laboratory of Aquatic Animal Diseases, Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University, Jinju, Gyeongnam 660-701, South Korea
| | - Jong Yong Kim
- Laboratory of Aquatic Animal Diseases, Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University, Jinju, Gyeongnam 660-701, South Korea
| | - Young Rim Kim
- Laboratory of Aquatic Animal Diseases, Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University, Jinju, Gyeongnam 660-701, South Korea
| | - Jeong Ho Lee
- Inland Aquaculture Research Center, National Institute of Fisheries Science, Jinhae-gu, Changwon, Gyeongnam 645-806, South Korea; and
| | - Roger S M Chong
- Veterinary Aquatic Animal Health, Veterinary Surgeons Board of Queensland, Brisbane, Queensland 4000, Australia
| | - Tae Sung Jung
- Laboratory of Aquatic Animal Diseases, Institute of Animal Medicine, College of Veterinary Medicine, Gyeongsang National University, Jinju, Gyeongnam 660-701, South Korea;
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33
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Pusch EA, Suarez DL. The Multifaceted Zoonotic Risk of H9N2 Avian Influenza. Vet Sci 2018; 5:E82. [PMID: 30248906 PMCID: PMC6313933 DOI: 10.3390/vetsci5040082] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 08/31/2018] [Accepted: 09/10/2018] [Indexed: 12/30/2022] Open
Abstract
Poultry-adapted H9N2 avian influenza viruses (AIVs) are commonly found in many countries in Asia, the Middle East, Africa, and Europe, and although classified as low pathogenic viruses, they are an economically important disease. Besides the importance of the disease in the poultry industry, some H9N2 AIVs are also known to be zoonotic. The disease in humans appears to cause primarily a mild upper respiratory disease, and doesn't cause or only rarely causes the severe pneumonia often seen with other zoonotic AIVs like H5N1 or H7N9. Serologic studies in humans, particularly in occupationally exposed workers, show a large number of people with antibodies to H9N2, suggesting infection is commonly occurring. Of the four defined H9N2 poultry lineages, only two lineages, the G1 and the Y280 lineages, are associated with human infections. Almost all of the viruses from humans have a leucine at position 226 (H3 numbering) of the hemagglutinin associated with a higher affinity of binding with α2,6 sialic acid, the host cell receptor most commonly found on glycoproteins in the human upper respiratory tract. For unknown reasons there has also been a shift in recent years of poultry viruses in the G1 and Y280 lineages to also having leucine instead of glutamine, the amino acid found in most avian viruses, at position 226. The G1 and Y280 poultry lineages because of their known ability to infect humans, the high prevalence of the virus in poultry in endemic countries, the lack of antibody in most humans, and the shift of poultry viruses to more human-like receptor binding makes these viruses a human pandemic threat. Increased efforts for control of the virus, including through effective vaccine use in poultry, is warranted for both poultry and public health goals.
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Affiliation(s)
- Elizabeth A Pusch
- Southeast Poultry Research Laboratory, US National Poultry Research Center, Agricultural Research Service, US Department of Agriculture, 934 College Station Road, Athens, GA 30605, USA.
| | - David L Suarez
- Southeast Poultry Research Laboratory, US National Poultry Research Center, Agricultural Research Service, US Department of Agriculture, 934 College Station Road, Athens, GA 30605, USA.
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Seiler P, Kercher L, Feeroz MM, Shanmuganatham K, Jones-Engel L, Turner J, Walker D, Alam SMR, Hasan MK, Akhtar S, McKenzie P, Franks J, Krauss S, Webby RJ, Webster RG. H9N2 influenza viruses from Bangladesh: Transmission in chicken and New World quail. Influenza Other Respir Viruses 2018; 12:814-817. [PMID: 29989679 PMCID: PMC6185884 DOI: 10.1111/irv.12589] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 05/18/2018] [Accepted: 07/09/2018] [Indexed: 11/30/2022] Open
Abstract
The H9N2 influenza viruses that have become established in Bangladeshi live poultry markets possess five gene segments of the highly pathogenic H7N3 avian influenza virus. We assessed the replication, transmission, and disease potential of three H9N2 viruses in chickens and New World quail. Each virus replicated to high titers and transmitted by the airborne route to contacts in both species. Infected chickens showed no disease signs, and the viruses differed in their disease potential in New World quail. New World quail were more susceptible than chickens to H9N2 viruses and shed virus after airborne transmission for 10 days. Consequently, New World quail are a potential threat in the maintenance and spread of influenza virus in live poultry markets.
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Affiliation(s)
- Patrick Seiler
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Lisa Kercher
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee
| | | | - Karthik Shanmuganatham
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee.,Diagnostic Virology Laboratory, National Veterinary Services Laboratories, United States Department of Agriculture, Animal and Plant Health Inspection Service, Ames, Iowa
| | - Lisa Jones-Engel
- National Primate Research Center, University of Washington, Seattle, Washington
| | - Jasmine Turner
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - David Walker
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - S M Rabiul Alam
- Department of Zoology, Jahangirnagar University, Dhaka, Bangladesh
| | - M Kamrul Hasan
- Department of Zoology, Jahangirnagar University, Dhaka, Bangladesh
| | - Sharmin Akhtar
- Department of Zoology, Jahangirnagar University, Dhaka, Bangladesh
| | - Pamela McKenzie
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - John Franks
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Scott Krauss
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Richard J Webby
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Robert G Webster
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee
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35
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Enhanced infection of avian influenza virus H9N2 with infectious laryngeotracheitis vaccination in chickens. Vet Microbiol 2018; 219:8-16. [PMID: 29778208 DOI: 10.1016/j.vetmic.2018.04.009] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Revised: 04/04/2018] [Accepted: 04/05/2018] [Indexed: 11/21/2022]
Abstract
Avian influenza and infectious laryngeotracheitis viruses are common causes of respiratory diseases in chickens with economical importance worldwide. In this study, we investigated the effect of experimental co-infection of avian influenza virus-H9N2 (AIV-H9N2) with infectious laryngeotracheitis virus (ILTV) live-attenuated vaccine (LAR-VAC®) on chickens. Four experimental groups were included in this study: negative control group, AIV-H9N2 group, AIV-H9N2+LAR-VAC® group, and LAR-VAC® group. AIV-H9N2 was inoculated intranasally to challenged groups at 35 days of age. On the same day, LAR-VAC® was ocularly administered to vaccinated groups. Chickens were observed for clinical signs, changes in body weight and mortality rates. Tissue samples, sera, tracheal and cloacal swabs, and blood were also collected at 3, 6, 9 and 12 days post-infection (PI). A significant increase in clinical signs and mortality rates were observed in the AIV-H9N2 + LAR-VAC® group. Moreover, chickens coinfected with AIV-H9N2 and LAR-VAC® showed a significant decrease in body weight and lymphoid organs indices. The tracheal gross and histopathological lesions and the shedding titer and period of AIV-H9N2 were significantly higher in AIV-H9N2 + LAR-VAC® group when compared to other groups. Furthermore, AIV-H9N2 infection leads to humoral and cellular immunosuppression as shown by a significant decrease in the CD4+/CD8+ ratio and antibody responses to ILTV and a significant increase in H/L ratio. In conclusion, this is the first report of co-infection of AIV-H9N2 and ILTV vaccine in chickens, which leads to increased pathogenicity, pathological lesions, and AIV-H9N2 shedding titer and period, which can lead to severe economic losses due to poor weight gain and mortality.
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36
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Farhanah MI, Yasmin AR, Khanh NP, Yeap SK, Hair-Bejo M, Omar AR. Bursal immunopathology responses of specific-pathogen-free chickens and red jungle fowl infected with very virulent infectious bursal disease virus. Arch Virol 2018; 163:2085-2097. [PMID: 29626271 DOI: 10.1007/s00705-018-3841-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Accepted: 03/28/2018] [Indexed: 01/07/2023]
Abstract
Very virulent infectious bursal disease virus (vvIBDV) targets B lymphocytes in the bursa of Fabricius (BF), causing immunosuppression and increased mortality rates in young birds. There have been few studies on the host immune response following vvIBDV infection at different inoculum doses in chickens with different genetic backgrounds. In this study, we characterized the immune responses of specific-pathogen-free (SPF) chickens and Malaysian red jungle fowl following infection with vvIBDV strain UPM0081 at 103.8 and 106.8 times the 50% embryo infectious dose (EID50). The viral burden, histopathological changes, immune cell populations, and expression of immune-related genes were measured and compared between infected and uninfected bursa at specific intervals. The populations of KUL1+, CD3+CD4+ and CD3+CD8+ cells were significantly increased in both types of chickens at 3 dpi, and there was significant early depletion of IgM+ B cells at 1 dpi in the red jungle fowl. vvIBDV infection also induced differential expression of genes that are involved in Th1 and pro-inflammatory responses, with groups receiving the higher dose (106.8 EID50) showing earlier expression of IFNG, IL12B, IL15, IL6, CXCLi2, IL28B, and TLR3 at 1 dpi. Although both chicken types showed equal susceptibility to infection, the red jungle fowl were clinically healthier than the SPF chickens despite showing more depletion of IgM+ B cells and failure to induce IFNB activation. In conclusion, high-dose vvIBDV infection caused an intense early host immune response in the infected bursa, with depletion of IgM+ B cells, bursal lesions, and cytokine expression as a response to mitigate the severity of the infection.
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Affiliation(s)
- Mohd Isa Farhanah
- Laboratory of Vaccines and Immunotherapeutics, Institute of Bioscience, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
| | - Abdul Rahaman Yasmin
- Department of Veterinary Laboratory Diagnostic, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
| | - Nguyen Phuc Khanh
- Laboratory of Vaccines and Immunotherapeutics, Institute of Bioscience, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
| | - Swee Keong Yeap
- Laboratory of Vaccines and Immunotherapeutics, Institute of Bioscience, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
| | - Mohd Hair-Bejo
- Laboratory of Vaccines and Immunotherapeutics, Institute of Bioscience, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia.,Department of Veterinary Pathology and Microbiology, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
| | - Abdul Rahman Omar
- Laboratory of Vaccines and Immunotherapeutics, Institute of Bioscience, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia. .,Department of Veterinary Pathology and Microbiology, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia.
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37
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Risk Factors for Avian Influenza H9 Infection of Chickens in Live Bird Retail Stalls of Lahore District, Pakistan 2009-2010. Sci Rep 2018; 8:5634. [PMID: 29618780 PMCID: PMC5884806 DOI: 10.1038/s41598-018-23895-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 03/20/2018] [Indexed: 11/13/2022] Open
Abstract
This study was conducted to identify risk factors associated with AIV infections in live bird retail stalls (LBRS) in Lahore District, Pakistan. A cross-sectional survey of LBRS was conducted from December 2009-February 2010 using two-stage cluster sampling based on probability proportional to size. A total of 280 oropharyngeal swab sample pools were collected from 1400 birds in 8 clusters and tested by qRT-PCR for the matrix (M) gene of type A influenza virus and HA gene subtypes H9, H5 and H7. Thirty-four (34) samples were positive for the M gene, of which 28 were also positive for H9. No sample was found positive for H5 or H7. Data for 36 potential risk factors, collected by questionnaire, were analyzed by survey-weighted logistic regression and prevalence odds ratios (OR) for associated risk factors were calculated. A final multivariable model identified three risk factors for H9 infection in LRBS, namely obtaining birds from mixed sources (OR 2.28, CI95%: 1.4–3.7), keeping birds outside cages (OR 3.10, CI95%: 1.4–7.0) and keeping chicken breeds other than broilers (OR 6.27, CI95%: 1.7–23.2). Sourcing birds from dealers/wholesalers, keeping birds inside cages and avoiding mixing different breeds in cages could reduce the risk of H9 infections in LRBS.
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38
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Yitbarek A, Alkie T, Taha-Abdelaziz K, Astill J, Rodriguez-Lecompte JC, Parkinson J, Nagy É, Sharif S. Gut microbiota modulates type I interferon and antibody-mediated immune responses in chickens infected with influenza virus subtype H9N2. Benef Microbes 2018; 9:417-427. [PMID: 29380643 DOI: 10.3920/bm2017.0088] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Commensal gut microbes play a critical role in shaping host defences against pathogens, including influenza viruses. The current study was conducted to assess the role and mechanisms of action of commensal gut microbiota on the innate and antibody-mediated responses of layer chickens against influenza virus subtype H9N2. A total of 104 one-day-old specific pathogen free chickens were assigned to either of the four treatments, which included two levels of antibiotics treatment (ABX- and ABX+) and two levels of H9N2 virus infection (H9N2- and H9N2+). At day 17 of age, chickens in the H9N2+ group were infected via the oral-nasal route with 400 μl of 107 TCID50/ml (200 μl/each route). Oropharyngeal and cloacal swabs at days 1, 3, 5, 7 and 9 post-infection (p.i.) for virus shedding, tissue samples at 12 h, 24 h and 36 h p.i. for mRNA measurement, and serum samples at days 7 and 14 p.i. for hemagglutination inhibition (HI) assay and IgG antibodies were collected. Virus shedding analysis showed that antibiotic treated (depleted)-H9N2 virus infected chickens showed a significantly higher oropharyngeal virus shedding at all time points, and cloacal shedding at days 3 and 5 p.i. compared to control treated (undepleted)-H9N2 infected chickens. Analysis of mRNA expression showed that infection of depleted chickens with H9N2 virus resulted in significantly down-regulated type I interferon responses both in the respiratory and gastrointestinal tracts compared to undepleted-H9N2 infected chickens. However, antibody-mediated immune response analysis showed a significantly higher HI antibody titre and IgG levels in the serum of chickens depleted with antibiotics and infected with H9N2 virus compared to undepleted-H9N2 infected chickens. In conclusion, findings from the current study suggest that the gut microbiota of chickens plays an important role in the initiation of innate responses against influenza virus infection, while the antibody-mediated immune response remains unaffected.
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Affiliation(s)
- A Yitbarek
- 1 Department of Pathobiology, Ontario Veterinary College, University of Guelph, Ontario, N1G 2W1, Canada
| | - T Alkie
- 1 Department of Pathobiology, Ontario Veterinary College, University of Guelph, Ontario, N1G 2W1, Canada
| | - K Taha-Abdelaziz
- 1 Department of Pathobiology, Ontario Veterinary College, University of Guelph, Ontario, N1G 2W1, Canada.,3 Pathology Department, Faculty of Veterinary Medicine, Beni-Suef University, Al Shamlah, 62511 Beni-Suef, Egypt
| | - J Astill
- 1 Department of Pathobiology, Ontario Veterinary College, University of Guelph, Ontario, N1G 2W1, Canada
| | - J C Rodriguez-Lecompte
- 2 Department of Pathology and Microbiology, Atlantic Veterinary College, University of Prince Edward Island, PEI, C1A 3P4 Canada
| | - J Parkinson
- 4 Department of Computer Science, University of Toronto, Toronto M5S 3G4, Canada.,5 Division of Molecular Structure and Function, Research Institute, Hospital for Sick Children, Toronto, Ontario M5G 1X8, Canada.,6 Departments of Biochemistry and Molecular Genetics, University of Toronto, M5S 1A8, Canada
| | - É Nagy
- 1 Department of Pathobiology, Ontario Veterinary College, University of Guelph, Ontario, N1G 2W1, Canada
| | - S Sharif
- 1 Department of Pathobiology, Ontario Veterinary College, University of Guelph, Ontario, N1G 2W1, Canada
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39
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Rohaim MA, Santhakumar D, Naggar RFE, Iqbal M, Hussein HA, Munir M. Chickens Expressing IFIT5 Ameliorate Clinical Outcome and Pathology of Highly Pathogenic Avian Influenza and Velogenic Newcastle Disease Viruses. Front Immunol 2018; 9:2025. [PMID: 30271403 PMCID: PMC6149294 DOI: 10.3389/fimmu.2018.02025] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Accepted: 08/16/2018] [Indexed: 12/18/2022] Open
Abstract
Innate antiviral immunity establishes first line of defense against invading pathogens through sensing their molecular structures such as viral RNA. This antiviral potential of innate immunity is mainly attributed to a myriad of IFN-stimulated genes (ISGs). Amongst well-characterized ISGs, we have previously shown that antiviral potential of chicken IFN-induced proteins with tetratricopeptides repeats 5 (chIFIT5) is determined by its interaction potential with 5'ppp containing viral RNA. Here, we generated transgenic chickens using avian sarcoma-leukosis virus (RCAS)-based gene transfer system that constitutively and stably express chIFIT5. The transgenic chickens infected with clinical dose (EID50 104 for HPAIV and 105 EID50 for vNDV) of high pathogenicity avian influenza virus (HPAIV; H5N1) or velogenic strain of Newcastle disease virus (vNDV; Genotype VII) showed marked resistance against infections. While transgenic chickens failed to sustain a lethal dose of these viruses (EID50 105 for HPAIV and 106 EID50 for vNDV), a delayed and lower level of clinical disease and mortality, reduced virus shedding and tissue damage was observed compared to non-transgenic control chickens. These observations suggest that stable expression of chIFIT5 alone is potentially insufficient in providing sterile protection against these highly virulent viruses; however, it is sufficient to ameliorate the clinical outcome of these RNA viruses. These findings propose the potential of innate immune genes in conferring genetic resistance in chickens against highly pathogenic and zoonotic viral pathogens causing sever disease in both animals and humans.
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Affiliation(s)
- Mohammed A Rohaim
- Department of Virology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt.,The Pirbright Institute, Woking, United Kingdom.,Division of Biomedical and Life Sciences, Faculty of Health and Medicine, Lancaster University, Lancaster, United Kingdom
| | - Diwakar Santhakumar
- Division of Biomedical and Life Sciences, Faculty of Health and Medicine, Lancaster University, Lancaster, United Kingdom
| | - Rania F El Naggar
- Department of Virology, Faculty of Veterinary Medicine, University of Sadat City, Sadat, Egypt
| | - Munir Iqbal
- The Pirbright Institute, Woking, United Kingdom
| | - Hussein A Hussein
- Department of Virology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Muhammad Munir
- Division of Biomedical and Life Sciences, Faculty of Health and Medicine, Lancaster University, Lancaster, United Kingdom
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40
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Huang L, Hou Q, Ye L, Yang Q, Yu Q. Crosstalk between H9N2 avian influenza virus and crypt-derived intestinal organoids. Vet Res 2017; 48:71. [PMID: 29096712 PMCID: PMC5667514 DOI: 10.1186/s13567-017-0478-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 10/02/2017] [Indexed: 12/30/2022] Open
Abstract
The spread of Avian influenza virus via animal feces makes the virus difficult to prevent, which causes great threat to human health. Therefore, it is imperative to understand the survival and invasion mechanism of H9N2 virus in the intestinal mucosa. In this study, we used mouse threedimensional intestinal organoids that contained intestinal crypts and villi differentiated from intestinal stem cells to explore interactions between H9N2 avian influenza virus and the intestinal mucosa. The HA, NA, NP and PB1 genes of H9N2 viruses could be detected in intestinal organoids at 1 h, and reached peak levels at 48 h post-infection. Moreover, the HA and NP proteins of H9N2 virus could also be detected in organoids via immunofluorescence. Virus invasion caused damage to intestinal organoids with reduced mRNA transcript expression of Wnt3, Dll1 and Dll4. The abnormal growth of intestinal organoids may be attributed to the loss of Paneth cells, as indicated by the low mRNA transcript levels of lyz1 and defcr1. This present study demonstrates that H9N2 virus could invade intestinal organoids and then cause damage, as well as affect intestinal stem cell proliferation and differentiation, promoting the loss of Paneth cells.
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Affiliation(s)
- Lulu Huang
- College of Veterinary Medicine, Nanjing Agricultural University, Weigang 1, Nanjing, 210095, Jiangsu, China
| | - Qihang Hou
- College of Veterinary Medicine, Nanjing Agricultural University, Weigang 1, Nanjing, 210095, Jiangsu, China
| | - Lulu Ye
- College of Veterinary Medicine, Nanjing Agricultural University, Weigang 1, Nanjing, 210095, Jiangsu, China
| | - Qian Yang
- College of Veterinary Medicine, Nanjing Agricultural University, Weigang 1, Nanjing, 210095, Jiangsu, China
| | - Qinghua Yu
- College of Veterinary Medicine, Nanjing Agricultural University, Weigang 1, Nanjing, 210095, Jiangsu, China.
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Mehrabadi MHF, Bahonar A, Mirzaei K, Molouki A, Ghalyanchilangeroudi A, Ghafouri SA, Tehrani F, Lim SHE. Prevalence of avian influenza (H9N2) in commercial quail, partridge, and turkey farms in Iran, 2014-2015. Trop Anim Health Prod 2017; 50:677-682. [PMID: 29027604 DOI: 10.1007/s11250-017-1438-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2016] [Accepted: 09/25/2017] [Indexed: 11/27/2022]
Abstract
Avian influenza virus (AIV) H9N2 subtype is endemic in Iran and causes substantial economic loss to the growing poultry industry within the country. In this study, a cross-sectional analysis was carried out to determine the sero-prevalence of H9N2 in several commercial farms between the years 2014 and 2015. The comparison of the mean of serum titers and the ratio of sero-positive birds between all units were analyzed using one-way ANOVA test. In 2014, a total of 77 farms (58 turkey farms, 14 quail farms, and 5 partridge farms) and 894 birds (682 turkeys, 154 quails, and 58 partridges) were sampled while in 2015, a total of 69 farms (54 turkey farms, 8 quail farms, and 7 partridge farms) and 856 birds (675 turkeys, 105 quails, and 76 partridges) were sampled. Of that, 52 of 77 sampled farms (67.5%) and 437 of 894 samples (48.9%) were positive for H9N2 in 2014 while. Forty-one of 69 farms (59.4%) and 307 of 856 sera (35.9%) were positive in 2015. Furthermore, the mean titer of partridge farms was significantly lower than that of turkey farms (p < 0.01) and the mean percentage of sero-positive turkey farms was significantly higher than partridge farms (p < 0.01) in 2014. In 2015, no significant difference was observed between the mean sera titer amongst farms and percentage of sero-positive birds (p > 0.05). Our results indicated that H9N2 is circulating in these farms. Since many more such farms are being established for operations, in addition to the threat of emergence and continuous reemergence of the disease in these farms, enhanced veterinary biosecurity measures on farms are required for mitigation.
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Affiliation(s)
- Mohammad Hosein Fallah Mehrabadi
- Department of Poultry Diseases, Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran.
| | - Alireza Bahonar
- Department of Food Hygiene & Quality Control, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Kamran Mirzaei
- Department of Health and Management of Poultry Diseases, Qazvin Veterinary Organization, Qazvin, Iran
| | - Aidin Molouki
- Department of Poultry Diseases, Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran
| | - Arash Ghalyanchilangeroudi
- Department of Microbiology and Immunology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Seyed Ali Ghafouri
- Department of Health and Management of Poultry Diseases, Iranian Veterinary Organization, Tehran, Iran
| | - Farshad Tehrani
- Department of Health and Management of Poultry Diseases, Iranian Veterinary Organization, Tehran, Iran
| | - Swee Hua Erin Lim
- Perdana University - Royal College of Surgeons in Ireland School of Medicine (PU-RCSI), MAEPS Building, MARDI Complex, Serdang, Selangor Darul Ehsan, Malaysia
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42
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Taunde P, Lucas AF, Chilundo A, Costa R, Bila CG. Serological survey of avian influenza virus infection of unvaccinated backyard chickens in Mandlhakazi, Southern Mozambique. Asian Pac J Trop Biomed 2017. [DOI: 10.1016/j.apjtb.2017.07.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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43
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Umar S, Guerin JL, Ducatez MF. Low Pathogenic Avian Influenza and Coinfecting Pathogens: A Review of Experimental Infections in Avian Models. Avian Dis 2017; 61:3-15. [PMID: 28301244 DOI: 10.1637/11514-101316-review] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Low pathogenic avian influenza virus (LPAIV) usually causes mild disease or asymptomatic infection in poultry. LPAIV has, however, become a great threat to poultry industry due to mixed infections with other pathogens. Coinfections do frequently occur in the field but are not easily detected, and their impact on pathobiology is not clearly defined due to their complicated nature, but it is well known that there is an impact. One way to increase our knowledge of coinfections in poultry is to challenge birds in experimental and controlled conditions. While many articles report in vivo experiments with LPAIV in avian models, only a few have studied coinfections. Moreover, researchers tend to choose different bird types, ages, inoculation routes, and doses for their experiments, making it difficult to compare between studies. This review describes the state of the art for experimental infections with LPAIV alone or associated with coinfecting pathogens in avian models. It also discusses how best to mimic field infections in laboratory settings. In the field of avian diseases, experimental design is obviously directly linked with the research question addressed, but there is a gap between field and experimental data, and further studies are warranted to better understand how to bring laboratory settings closer to field situations.
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Affiliation(s)
- Sajid Umar
- IHAP, Université de Toulouse, INRA, ENVT, 23 Chemin des Capelles, 37076 Toulouse, France
| | - Jean Luc Guerin
- IHAP, Université de Toulouse, INRA, ENVT, 23 Chemin des Capelles, 37076 Toulouse, France
| | - Mariette F Ducatez
- IHAP, Université de Toulouse, INRA, ENVT, 23 Chemin des Capelles, 37076 Toulouse, France
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44
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Fadel HM, Afifi R. Investigation of avian influenza infection in wild birds in Ismailia and Damietta cities, Egypt. Vet World 2017; 10:695-701. [PMID: 28717324 PMCID: PMC5499089 DOI: 10.14202/vetworld.2017.695-701] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 05/05/2017] [Indexed: 11/27/2022] Open
Abstract
Aim: This study was carried out to monitor avian influenza (AI) infection in wild birds in Egypt. Materials and Methods: A total of 135 wild birds were examined for the presence of H5, H7, and H9 hemagglutination inhibition antibodies. Organs and swab samples of 75 birds were screened by multiplex real-time reverse transcriptase-polymerase chain reaction (RRT-PCR) to detect AI subtypes H5, H7, and H9 matrix genes. Results: The highest seropositive result was recorded in cattle egrets (90.9%) followed by crows (88.6%), semi-captive pigeons (44.8%), and moorhens (39.1%). In cattle egrets, semi-captive pigeons and moorhens, H5 antibodies predominated. In crows, H9 antibodies predominated. Multiple infections with two or three virus subtypes were highest in crows (6/39, 15.4%) followed by cattle egrets (3/30, 10%) and moorhens’ (1/9, 11.1%) positive samples. Multiplex RRT-PCR results revealed two positive samples in cattle egrets and moorhens. Conclusion: The results indicated high seropositive rates against AI virus subtypes H5 and H9 in the examined wild birds. Multiple infections with more than one AI virus (AIV) subtypes were detected in some birds. This requires a collaboration of efforts to monitor AIV infection in wild birds and implement suitable early intervention measures.
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Affiliation(s)
- Hanaa Mohamed Fadel
- Department of Animal Hygiene and Zoonoses, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, Egypt
| | - Rabab Afifi
- Department of Wildlife and Zoo Medicine, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, Egypt
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45
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Bonfante F, Cattoli G, Leardini S, Salomoni A, Mazzetto E, Davidson I, Haddas R, Terregino C. Synergy or interference of a H9N2 avian influenza virus with a velogenic Newcastle disease virus in chickens is dose dependent. Avian Pathol 2017; 46:488-496. [DOI: 10.1080/03079457.2017.1319904] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Francesco Bonfante
- Division of Comparative Biomedical Sciences, Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Italy
| | - Giovanni Cattoli
- Division of Comparative Biomedical Sciences, Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Italy
- Animal Production and Health Laboratory, Joint FAO/IAEA Division for Nuclear Applications in Food and Agriculture, International Atomic Energy Agency, Seibersdorf, Austria
| | - Sofia Leardini
- Division of Comparative Biomedical Sciences, Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Italy
| | - Angela Salomoni
- Division of Comparative Biomedical Sciences, Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Italy
| | - Eva Mazzetto
- Division of Comparative Biomedical Sciences, Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Italy
| | - Irit Davidson
- Division of Avian Diseases, Kimron Veterinary Institute, Bet Dagan, Israel
| | - Ruth Haddas
- Division of Avian Diseases, Kimron Veterinary Institute, Bet Dagan, Israel
| | - Calogero Terregino
- Division of Comparative Biomedical Sciences, Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Italy
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46
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Mutations during the Adaptation of H9N2 Avian Influenza Virus to the Respiratory Epithelium of Pigs Enhance Sialic Acid Binding Activity and Virulence in Mice. J Virol 2017; 91:JVI.02125-16. [PMID: 28148793 DOI: 10.1128/jvi.02125-16] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 01/25/2017] [Indexed: 12/23/2022] Open
Abstract
The natural reservoir for influenza viruses is waterfowl, and from there they succeeded in crossing the barrier to different mammalian species. We analyzed the adaptation of avian influenza viruses to a mammalian host by passaging an H9N2 strain three times in differentiated swine airway epithelial cells. Using precision-cut slices from the porcine lung to passage the parental virus, isolates from each of the three passages (P1 to P3) were characterized by assessing growth curves and ciliostatic effects. The only difference noted was an increased growth kinetics of the P3 virus. Sequence analysis revealed four mutations: one each in the PB2 and NS1 proteins and two in the HA protein. The HA mutations, A190V and T212I, were characterized by generating recombinant viruses containing either one or both amino acid exchanges. Whereas the parental virus recognized α2,3-linked sialic acids preferentially, the HA190 mutant bound to a broad spectrum of glycans with α2,6/8/9-linked sialic acids. The HA212 mutant alone differed only slightly from the parental virus; however, the combination of both mutations (HA190+HA212) increased the binding affinity to those glycans recognized by the HA190 mutant. Remarkably, only the HA double mutant showed a significantly increased pathogenicity in mice. In contrast, none of those mutations affected the ciliary activity of the epithelial cells which is characteristic for virulent swine influenza viruses. Taken together, our results indicate that shifts in the HA receptor affinity are just an early adaptation step of avian H9N2 strains; further mutational changes may be required to become virulent for pigs.IMPORTANCE Swine play an important role in the interspecies transmission of influenza viruses. Avian influenza A viruses (IAV) of the H9N2 subtype have successfully infected hosts from different species but have not established a stable lineage. We have analyzed the adaptation of IAV-H9N2 virus to target cells of a new host by passaging the virus three times in differentiated porcine respiratory epithelial cells. Among the four mutations detected, the two HA mutations were analyzed by generating recombinant viruses. Depending on the infection system used, the mutations differed in their phenotypic expression, e.g., sialic acid binding activity, replication kinetics, plaque size, and pathogenicity in inbred mice. However, none of the mutations affected the ciliary activity which serves as a virulence marker. Thus, early adaptive mutation enhances the replication kinetics, but more mutations are required for IAV of the H9N2 subtype to become virulent.
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47
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Shriner SA, Root JJ, Lutman MW, Kloft JM, VanDalen KK, Sullivan HJ, White TS, Milleson MP, Hairston JL, Chandler SC, Wolf PC, Turnage CT, McCluskey BJ, Vincent AL, Torchetti MK, Gidlewski T, DeLiberto TJ. Surveillance for highly pathogenic H5 avian influenza virus in synanthropic wildlife associated with poultry farms during an acute outbreak. Sci Rep 2016; 6:36237. [PMID: 27812044 PMCID: PMC5095889 DOI: 10.1038/srep36237] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Accepted: 10/12/2016] [Indexed: 02/02/2023] Open
Abstract
In November 2014, a Eurasian strain H5N8 highly pathogenic avian influenza virus was detected in poultry in Canada. Introduced viruses were soon detected in the United States and within six months had spread to 21 states with more than 48 million poultry affected. In an effort to study potential mechanisms of spread of the Eurasian H5 virus, the United States Department of Agriculture coordinated several epidemiologic investigations at poultry farms. As part of those efforts, we sampled synanthropic birds and mammals at five infected and five uninfected poultry farms in northwest Iowa for exposure to avian influenza viruses. Across all farms, we collected 2,627 samples from 648 individual birds and mammals. House mice were the most common mammal species captured while house sparrows, European starlings, rock pigeons, swallows, and American robins were the most commonly captured birds. A single European starling was positive for Eurasian H5 viral RNA and seropositive for antibodies reactive to the Eurasian H5 virus. Two American robins were also seropositive. No mammal species showed evidence of infection. These results indicate synanthropic species merit further scrutiny to better understand potential biosecurity risks. We propose a set of management practices aimed at reducing wildlife incursions.
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Affiliation(s)
- Susan A. Shriner
- National Wildlife Research Center, USDA-APHIS, Fort Collins, CO, USA
| | - J. Jeffrey Root
- National Wildlife Research Center, USDA-APHIS, Fort Collins, CO, USA
| | - Mark W. Lutman
- National Wildlife Research Center, USDA-APHIS, Fort Collins, CO, USA
| | | | - Kaci K. VanDalen
- National Wildlife Research Center, USDA-APHIS, Fort Collins, CO, USA
| | | | | | | | | | | | - Paul C. Wolf
- Wildlife Services, USDA-APHIS, Minneapolis, MN USA
| | | | - Brian J. McCluskey
- Science, Technology and Analysis Services, Veterinary Services, USDA-APHIS, Fort Collins, CO, USA
| | - Amy L. Vincent
- Virus and Prion Diseases of Livestock Research Unit, National Animal Disease Center, USDA-ARS, Ames, Iowa, USA
| | - Mia K. Torchetti
- National Veterinary Services Laboratories, Science, Technology and Analysis Services, Veterinary Services, USDA-APHIS, Ames, IA, USA
| | - Thomas Gidlewski
- National Wildlife Research Center, USDA-APHIS, Fort Collins, CO, USA
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48
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James J, Howard W, Iqbal M, Nair VK, Barclay WS, Shelton H. Influenza A virus PB1-F2 protein prolongs viral shedding in chickens lengthening the transmission window. J Gen Virol 2016; 97:2516-2527. [PMID: 27558742 PMCID: PMC5078828 DOI: 10.1099/jgv.0.000584] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Avian influenza is a significant economic burden on the poultry industry in geographical regions where it is enzootic. It also poses a public health concern when avian influenza subtypes infect humans, often with high mortality. Understanding viral genetic factors which positively contribute to influenza A virus (IAV) fitness – infectivity, spread and pathogenesis – is of great importance both for human and livestock health. PB1-F2 is a small accessory protein encoded by IAV and in mammalian hosts has been implicated in a wide range of functions that contribute to increased pathogenesis. In the avian host, the protein has been understudied despite high-level full-length conservation in avian IAV isolates, which is in contrast to the truncations of the PB1-F2 length frequently found in mammalian host isolates. Here we report that the presence of a full-length PB1-F2 protein, from a low pathogenicity H9N2 avian influenza virus, prolongs infectious virus shedding from directly inoculated chickens, thereby enhancing transmission of the virus by lengthening the transmission window to contact birds. As well as extending transmission, the presence of a full-length PB1-F2 suppresses pathogenicity evidenced by an increased minimum lethal dose in embryonated chicken eggs and increasing survival in directly infected birds when compared to a virus lacking an ORF for PB1-F2. We propose that there is a positive pressure to maintain a full-length functional PB1-F2 protein upon infection of avian hosts as it contributes to the effective transmission of IAV in the field.
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Affiliation(s)
- Joe James
- Avian Viral Diseases Programme, The Pirbright Institute, Pirbright, Surrey, UK.,Faculty of Medicine, Imperial College London, Norfolk Place, London, UK
| | - Wendy Howard
- Faculty of Medicine, Imperial College London, Norfolk Place, London, UK
| | - Munir Iqbal
- Avian Viral Diseases Programme, The Pirbright Institute, Pirbright, Surrey, UK
| | - Venugopal K Nair
- Avian Viral Diseases Programme, The Pirbright Institute, Pirbright, Surrey, UK
| | - Wendy S Barclay
- Faculty of Medicine, Imperial College London, Norfolk Place, London, UK
| | - Holly Shelton
- Avian Viral Diseases Programme, The Pirbright Institute, Pirbright, Surrey, UK
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49
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El Houadfi M, Fellahi S, Nassik S, Guérin JL, Ducatez MF. First outbreaks and phylogenetic analyses of avian influenza H9N2 viruses isolated from poultry flocks in Morocco. Virol J 2016; 13:140. [PMID: 27527708 PMCID: PMC4986173 DOI: 10.1186/s12985-016-0596-1] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Accepted: 08/08/2016] [Indexed: 11/21/2022] Open
Abstract
Background H9N2 avian influenza viruses continue to spread in poultry and wild birds worldwide. Morocco just faced its first H9N2 influenza virus outbreaks early 2016 affecting different types of poultry production. After its introduction, the virus spread very rapidly throughout the country. Methods Samples were collected from 11 chicken flocks with high morbidity and mortality rates. Four viruses were successfully isolated from broiler chickens and one from broiler breeders and fully sequenced. Results Phylogenetic and molecular markers analyses showed the Moroccan viruses belonged to the G1 lineage and likely originated from the Middle East. As known for H9N2 viruses, the Moroccanisolates possess several genetic markers that enhance virulence in poultry and transmission to humans. Conclusion The present study demonstrated that under field conditions H9N2 could have a devastating effect on egg production and mortalities and highlighted a lack of surveillance data on the pathogen in the region.
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Affiliation(s)
- Mohammed El Houadfi
- Unité de Pathologie Aviaire, Institut Agronomique et Vétérinaire Hassan II, Rabat, Morocco, 10000. .,Avian Pathology Unit, Department of Pathology and Veterinary Public Health, Agronomy and Veterinary Institute Hassan II, BP 6202, Rabat- Instituts, Rabat, Morocco.
| | - Siham Fellahi
- Unité de Pathologie Aviaire, Institut Agronomique et Vétérinaire Hassan II, Rabat, Morocco, 10000
| | - Saadia Nassik
- Unité de Pathologie Aviaire, Institut Agronomique et Vétérinaire Hassan II, Rabat, Morocco, 10000
| | - Jean-Luc Guérin
- IHAP, Université de Toulouse, INRA, ENVT, F-31076, Toulouse, France
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50
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Umar S, Munir MT, Kaboudi K, Rehman A, Asif S, Usman M, Ali A, Shahzad M, Subhan S, Shah MAA. Effect of route of inoculation on replication of avian influenza virus (H9N2) and interferon gene expression in guinea fowl (Numida meleagridis). Br Poult Sci 2016; 57:451-61. [PMID: 27057651 DOI: 10.1080/00071668.2016.1174979] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The study was designed to investigate the replication of a re-assortant H9N2 avian influenza virus (AIV) and induction of the interferon (IFNγ) response after aerosol or intranasal inoculation with the virus in guinea fowl. To determine virus shedding pattern, oropharyngeal and cloacal swabs and tissue specimens of trachea, lungs, spleen and caecal tonsils were collected post-inoculation (pi). Infected guinea fowl showed mild clinical signs, while negative control guinea fowl remained healthy and active throughout the experiment irrespective of the inoculation route. However, the clinical signs were more prominent in guinea fowl infected through the aerosol route. Virus was detected in all oropharyngeal and cloacal swabs up to 7 d pi in guinea fowl from both inoculation groups. However, virus was detected more frequently and in higher titres in oropharyngeal swabs and specimens of trachea and lungs from the group exposed to aerosols than in the group given intranasal drops. In accordance with viral replication findings, expression of IFNγ was up-regulated on 1, 2 and 4 d pi to a significantly higher level in lung tissue specimens from the group exposed to virus aerosol than from controls treated with PBS intranasally. On the other hand, IFNγ was up-regulated above that of controls in lung tissue specimens from the group treated with intranasal drops of virus only on 4 d pi. These findings indicate that virus administered in aerosols was more efficient in infecting the lower respiratory tract and in inducing activity of the IFNγ gene than virus administered as intranasal drops. The results of this study suggest that virus aerosols cause more intense respiratory infection and increase the shedding of the H9N2 AIV in guinea fowl, highlighting the potential role of guinea fowl as a mixing bowl for transmission and maintenance of H9N2 AIV between poultry premises.
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Affiliation(s)
- S Umar
- a Department of Pathobiology, Faculty of Veterinary Sciences , University of Arid Agriculture , Rawalpindi , Pakistan
| | - M T Munir
- a Department of Pathobiology, Faculty of Veterinary Sciences , University of Arid Agriculture , Rawalpindi , Pakistan
| | - K Kaboudi
- b Department of Poultry Farming and Pathology, National Veterinary School , Sidi Thabet Ariana , Tunisia
| | - A Rehman
- c Department of Epidemiology and Public Health , University of Veterinary and Animal Sciences Lahore , Pakistan
| | - S Asif
- d Department of Microbiology , University of Veterinary & Animal Sciences Lahore , Pakistan
| | - M Usman
- e Department of Poultry Production , Poultry Research Institute (PRI) Rawalpindi , Pakistan
| | - A Ali
- f Department of Livestock & Dairy Development , Punjab , Pakistan
| | - M Shahzad
- g Department of Pathology , University of Veterinary & Animal Sciences Lahore , Pakistan
| | - S Subhan
- d Department of Microbiology , University of Veterinary & Animal Sciences Lahore , Pakistan
| | - M A A Shah
- a Department of Pathobiology, Faculty of Veterinary Sciences , University of Arid Agriculture , Rawalpindi , Pakistan
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