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Fan Q, Xie Z, Zhang Y, Xie Z, Xie L, Huang J, Zeng T, Wang S, Luo S, Li M. A multiplex fluorescence-based loop-mediated isothermal amplification assay for identifying chicken parvovirus, chicken infectious anaemia virus, and fowl aviadenovirus serotype 4. Avian Pathol 2023; 52:128-136. [PMID: 36622371 DOI: 10.1080/03079457.2022.2159326] [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] [Indexed: 01/10/2023]
Abstract
Chicken parvovirus (ChPV), chicken infectious anaemia virus (CIAV) and fowl adenovirus serotype 4 (FAdV-4) are avian viruses that have emerged in recent years and have endangered the global poultry industry, causing great economic loss. In this study, a multiplex fluorescence-based loop-mediated isothermal amplification (mLAMP) assay for detecting ChPV, CIAV and FAdV-4 was developed to simultaneously diagnose single and mixed infections in chickens. Three primer sets and composite probes were designed according to the conserved regions of the NS gene of ChPV, VP1 gene of CIAV and hexon gene of FAdV-4. Each composite probe was labelled with a different fluorophore, which was detached to release the fluorescence signal after amplification. The target viruses were distinguished based on the colour of the mLAMP products. The mLAMP assay was shown to be sensitive, with detection limits of 307 copies of recombinant plasmids containing the ChPV target genes, 749 copies of CIAV and 648 copies of FAdV-4. The assay exhibited good specificity and no cross-reactivity with other symptomatically related avian viruses. When used on field materials, the results of the mLAMP assay were in 100% agreement with those of the previously published PCR assay. The mLAMP assay is rapid, economical, sensitive and specific, and the results of amplification are directly observable by eye. Therefore, the mLAMP assay is a useful tool for the clinical detection of ChPV, CIAV and FAdV-4 and can be applied in rural areas.
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Affiliation(s)
- Qing Fan
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, People's Republic of China
- Key Laboratory of China-ASEAN (Guangxi) Cross-border Animal Disease Prevention and Control, Ministry of Agriculture and Rural Affairs, Nanning, People's Republic of China
| | - Zhixun Xie
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, People's Republic of China
- Key Laboratory of China-ASEAN (Guangxi) Cross-border Animal Disease Prevention and Control, Ministry of Agriculture and Rural Affairs, Nanning, People's Republic of China
| | - Yanfang Zhang
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, People's Republic of China
| | - Zhiqin Xie
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, People's Republic of China
| | - Liji Xie
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, People's Republic of China
- Key Laboratory of China-ASEAN (Guangxi) Cross-border Animal Disease Prevention and Control, Ministry of Agriculture and Rural Affairs, Nanning, People's Republic of China
| | - Jiaoling Huang
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, People's Republic of China
- Key Laboratory of China-ASEAN (Guangxi) Cross-border Animal Disease Prevention and Control, Ministry of Agriculture and Rural Affairs, Nanning, People's Republic of China
| | - Tingting Zeng
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, People's Republic of China
- Key Laboratory of China-ASEAN (Guangxi) Cross-border Animal Disease Prevention and Control, Ministry of Agriculture and Rural Affairs, Nanning, People's Republic of China
| | - Sheng Wang
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, People's Republic of China
- Key Laboratory of China-ASEAN (Guangxi) Cross-border Animal Disease Prevention and Control, Ministry of Agriculture and Rural Affairs, Nanning, People's Republic of China
| | - Sisi Luo
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, People's Republic of China
- Key Laboratory of China-ASEAN (Guangxi) Cross-border Animal Disease Prevention and Control, Ministry of Agriculture and Rural Affairs, Nanning, People's Republic of China
| | - Meng Li
- Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning, People's Republic of China
- Key Laboratory of China-ASEAN (Guangxi) Cross-border Animal Disease Prevention and Control, Ministry of Agriculture and Rural Affairs, Nanning, People's Republic of China
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Assen AM, Yegoraw AA, Walkden-Brown SW, Gerber PF. Molecular-based monitoring of live vaccines in dust samples from experimental and commercial chicken flocks and its potential use as a screening test. Res Vet Sci 2021; 143:50-57. [PMID: 34973539 DOI: 10.1016/j.rvsc.2021.12.015] [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: 03/26/2021] [Revised: 11/27/2021] [Accepted: 12/16/2021] [Indexed: 11/17/2022]
Abstract
Despite the high cost of vaccination programmes, conventional methods to evaluate vaccine uptake are often impractical and costly. More recently, molecular-based testing of poultry dust has been used to monitor the "take" of Marek's disease virus and infectious laryngotracheitis virus (ILTV) live vaccines. This study aimed to provide proof-of-concept for detecting other poultry pathogens by using molecular detection of vaccine microorganisms in poultry dust of vaccinated flocks. Dust and choanal cleft and cloacal swabs were collected from chickens vaccinated against avian encephalomyelitis virus (AEV), fowlpox virus (FPV), Mycoplasma gallisepticum (MG) and Mycoplasma synoviae (MS) using live vaccines in an experimental flock. Dust samples were collected weekly from 5 commercial breeder or layer flocks from day-old up to 25 weeks of age. These flocks were vaccinated against Newcastle disease virus (NDV), infectious bronchitis virus (IBV), infectious bursal disease virus (IBDV), ILTV, fowl adenovirus (FAdV), MG and MS. Samples were tested for nucleic acids of these microorganisms by PCR or reverse transcriptase PCR. Genomes of all targeted vaccines were detected in dust samples from the experimental and commercial flocks except for FPV, which was detected only in the experimental flock. FAdV was detected in unvaccinated commercial flocks. These findings suggest that PCR detection of target organisms in dust samples has potential as a relatively simple and inexpensive population-level test to monitor vaccine take and/or pathogen status in chicken flocks. Further studies comparing the detection of each of these microorganisms in poultry dust with individual birds samples are required to validate this approach.
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Affiliation(s)
- Awol M Assen
- Animal Science, School of Environmental and Rural Science, University of New England, Armidale, NSW 2351, Australia; School of Veterinary Medicine, Wollo University, Dessie, Ethiopia
| | - Addisu A Yegoraw
- Animal Science, School of Environmental and Rural Science, University of New England, Armidale, NSW 2351, Australia; School of Veterinary Medicine, Wolaita Sodo University, Wolaita Sodo, Ethiopia
| | - Stephen W Walkden-Brown
- Animal Science, School of Environmental and Rural Science, University of New England, Armidale, NSW 2351, Australia
| | - Priscilla F Gerber
- Animal Science, School of Environmental and Rural Science, University of New England, Armidale, NSW 2351, Australia.
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Kabir MAA, Saha S, Hossain MG, Khan KA, Islam MA, Rahman L. Serological survey on the prevalence of chicken infectious anemia virus in broiler breeder and layer farms in some selected areas of Bangladesh. J Adv Vet Anim Res 2021; 8:323-329. [PMID: 34395604 PMCID: PMC8280981 DOI: 10.5455/javar.2021.h518] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 01/10/2021] [Accepted: 05/19/2021] [Indexed: 11/23/2022] Open
Abstract
Objective: Chicken infectious anemia virus (CIAV) is an economically important emerging infection of poultry as it causes immunosuppression and reduces egg production. Although it is worldwide distributed and first reported (single case) in Bangladesh in 2002, no epidemiological and serological investigations have been conducted. The current study aimed to conduct a serological investigation on the prevalence of CIAV infection in broiler breeder and layer farms in some selected areas of Bangladesh. Materials and Methods: A total number of 460 sera samples were randomly collected from unvaccinated broiler breeder and layer flocks, of which 276 were from 11 broiler breeder farms and 184 from 12 layer farms. The sera samples were subjected to a commercially available enzyme-linked immunosorbent assay kit to observe antibodies induced by CIAV. Results: Results demonstrated that the overall prevalence of CIAV was 83.6% among a total of 460 samples. In broiler breeder birds, the prevalence was 89.9%, whereas it was 78.3% in layer birds. A higher number of female birds was found to be seropositive than male birds. However, chickens of all age groups were found to be susceptible to the virus. Conclusions: These results indicate the presence of CIAV in Bangladesh, which may be the sequel of naturally occurring either vertical or horizontal infection in all bird flocks tested without clinical symptoms of the disease. A further epidemiological investigation will be required, followed by molecular isolation and characterization of the virus for suitable vaccine candidate selection and/or preparation.
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Affiliation(s)
- Md Al Arif Kabir
- Department of Microbiology and Hygiene, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Sukumar Saha
- Department of Microbiology and Hygiene, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Md Golzar Hossain
- Department of Microbiology and Hygiene, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Kamrul Ahmed Khan
- Department of Microbiology and Hygiene, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Md Alimul Islam
- Department of Microbiology and Hygiene, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Lutfor Rahman
- Poultry Care Lab, Paragon Group, Gazipur, Bangladesh
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