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Silva ML, Caiaffa MG, da Costa ALM, Teixeira RHF, Ervedosa TB, Machado EF, Suárez PEN, Réssio RA, Borges CC, de Jesus IP, de Carvalho J, Figueiredo KB, de Carvalho ACSR, Brandão PE, de Azevedo Fernandes NCC, Guerra JM. Canine distemper virus and canine adenovirus type 1 co-infection in a free-living hoary fox (Lycalopex vetulus) from Brazil. Braz J Microbiol 2023; 54:587-595. [PMID: 36749535 PMCID: PMC9943989 DOI: 10.1007/s42770-023-00921-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 02/01/2023] [Indexed: 02/08/2023] Open
Abstract
The present case is the first description of a co-infection with canine distemper virus (CDV) and canine adenovirus type 1 (CAdV-1) in a free-living hoary fox pup from Brazil. The animal was found and rescued with poor body condition, dehydration, incoordination, ataxia, excessive vocalization, and "blue eyes" phenomenon. Despite the efforts, euthanasia was elected due to worsening clinical signs and poor prognosis. Pathologic examination revealed a mild, acute, random, necrotizing hepatitis, acute bronchopneumonia, hydrocephalus, corneal edema with epithelium degeneration, and acidophilic intracytoplasmatic inclusion bodies in different epithelial cells types with rare syncytial. Through immunohistochemistry, CDV antigen was observed in the tongue, trachea, lungs, liver, spleen, stomach, intestine and urinary bladder. Adenovirus antigen was identified in the nucleus of scattered hepatocytes. Polymerase chain reaction and sequencing demonstrated high similarity with CAdV-1 and wild-type strain of CDV close related to Brazilian viral lineages isolated from domestic dogs. Disease surveillance in wildlife animals is essential to assess possible conservation threats and consider the implementation of mitigation or control measures.
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Affiliation(s)
- Maraya Lincoln Silva
- Parque Zoológico Municipal Quinzinho de Barros, Rua Teodoro Kaisel, 883 - Vila Hortência, Sorocaba - SP, Sorocaba, São Paulo, 18020268, Brazil
| | - Mayara Grego Caiaffa
- Parque Zoológico Municipal Quinzinho de Barros, Rua Teodoro Kaisel, 883 - Vila Hortência, Sorocaba - SP, Sorocaba, São Paulo, 18020268, Brazil
| | - André Luiz Mota da Costa
- Parque Zoológico Municipal Quinzinho de Barros, Rua Teodoro Kaisel, 883 - Vila Hortência, Sorocaba - SP, Sorocaba, São Paulo, 18020268, Brazil
| | - Rodrigo Hidalgo Friciello Teixeira
- Parque Zoológico Municipal Quinzinho de Barros, Rua Teodoro Kaisel, 883 - Vila Hortência, Sorocaba - SP, Sorocaba, São Paulo, 18020268, Brazil
| | - Ticiana Brasil Ervedosa
- Centro de Patologia, Instituto Adolfo Lutz, Avenida Dr. Arnaldo, 351, Pacaembú, São Paulo, SP, 01246000, Brazil
| | - Eduardo Ferreira Machado
- Centro de Patologia, Instituto Adolfo Lutz, Avenida Dr. Arnaldo, 351, Pacaembú, São Paulo, SP, 01246000, Brazil
- Laboratório de Patologia Comparada (LAPCOM), Departamento de Patologia, Faculdade de Veterinária E Zootecnia, Universidade de São Paulo, Avenida Professor Orlando Marques de Paiva, 70, São Paulo, SP, 05508270, Brazil
| | - Pedro Enrique Navas Suárez
- Centro de Patologia, Instituto Adolfo Lutz, Avenida Dr. Arnaldo, 351, Pacaembú, São Paulo, SP, 01246000, Brazil
| | - Rodrigo Albergaria Réssio
- Centro de Patologia, Instituto Adolfo Lutz, Avenida Dr. Arnaldo, 351, Pacaembú, São Paulo, SP, 01246000, Brazil
| | - Cinthya Cirqueira Borges
- Centro de Patologia, Instituto Adolfo Lutz, Avenida Dr. Arnaldo, 351, Pacaembú, São Paulo, SP, 01246000, Brazil
| | - Isis Paixão de Jesus
- Centro de Patologia, Instituto Adolfo Lutz, Avenida Dr. Arnaldo, 351, Pacaembú, São Paulo, SP, 01246000, Brazil
| | - Julia de Carvalho
- Centro de Patologia, Instituto Adolfo Lutz, Avenida Dr. Arnaldo, 351, Pacaembú, São Paulo, SP, 01246000, Brazil
| | | | | | - Paulo Eduardo Brandão
- Laboratório de Zoonoses Virais, Medicina Veterinária Preventiva E Saúde Animal, Faculdade de Veterinária E Zootecnia, Universidade de São Paulo, Avenida Professor Orlando Marques de Paiva, 70, São Paulo, SP, 05508270, Brazil
| | - Natália Coelho Couto de Azevedo Fernandes
- Centro de Patologia, Instituto Adolfo Lutz, Avenida Dr. Arnaldo, 351, Pacaembú, São Paulo, SP, 01246000, Brazil
- Laboratório de Patologia Comparada (LAPCOM), Departamento de Patologia, Faculdade de Veterinária E Zootecnia, Universidade de São Paulo, Avenida Professor Orlando Marques de Paiva, 70, São Paulo, SP, 05508270, Brazil
| | - Juliana Mariotti Guerra
- Centro de Patologia, Instituto Adolfo Lutz, Avenida Dr. Arnaldo, 351, Pacaembú, São Paulo, SP, 01246000, Brazil.
- Laboratório de Patologia Comparada (LAPCOM), Departamento de Patologia, Faculdade de Veterinária E Zootecnia, Universidade de São Paulo, Avenida Professor Orlando Marques de Paiva, 70, São Paulo, SP, 05508270, Brazil.
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Abayli H, Aslan O, Tumer KC, Can-Sahna K, Tonbak S. Investigation of canine chaphamaparvovirus, canine bufavirus, and canine adenovirus in dogs with diarrhea: First report of novel canine bufavirus in Turkey. Virus Genes 2023;:1-10. [PMID: 36849575 DOI: 10.1007/s11262-023-01982-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 02/16/2023] [Indexed: 03/01/2023]
Abstract
Viral enteritis is a significant cause of death among dogs younger than 6 months. In this study, the presence of canine chaphamaparvovirus (CaChPV), canine bufavirus (CBuV), and canine adenovirus (CAdV) was investigated in 62 diarrheal dogs previously tested for other viral pathogens (canine parvovirus type 2, canine coronavirus, and canine circovirus). CBuV was detected in two dogs (3.22%) and CaChPV in one dog (1.61%). One dog tested positive for three parvoviruses (CPV-2b, CBuV, and CaChPV). All dogs tested negative to CAdV-1/CAdV-2. A long genome fragment of one of the two identified CBuVs and of the CaChPV was obtained and analyzed. New Turkish CBuVs had high identity rates (96%-98% nt; 97%-98% aa) with some Italian CBuV strains (CaBuV/9AS/2005/ITA and CaBuV/35/2016/ITA). The phylogenetic analysis powerfully demonstrated that these viruses belonged to a novel genotype (genotype 2). A part of the genome ChPV-TR-2021-19 revealed high identity rates (> 98% nt and > 99% aa) with some Canadian CaChPV strains (NWT-W88 and NWT-W171) and the Italian CaChPV strain Te/37OVUD/2019/IT. This study is the first report on the detection of CBuV-2 and the concomitant presence of three canine parvoviruses in Turkey. The obtained data will contribute to the molecular epidemiology and the role in the etiology of enteric disease of new parvoviruses.
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Dema A, Tallapally MR, Ganji VK, Buddala B, Kodi H, Ramidi A, Yella NR, Putty K. A comprehensive molecular survey of viral pathogens associated with canine gastroenteritis. Arch Virol 2023; 168:36. [PMID: 36609588 PMCID: PMC9825073 DOI: 10.1007/s00705-022-05674-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 10/17/2022] [Indexed: 01/09/2023]
Abstract
Viral pathogens are the primary cause of canine gastroenteritis. However, few structured comprehensive studies on the viral etiology of canine gastroenteritis have been conducted. In this study, 475 rectal swabs collected over three years (2018-2021) from clinical canine gastroenteritis cases were screened for the presence of six major enteric viruses - canine parvovirus 2 (CPV-2), canine distemper virus (CDV), canine adenovirus 2 (CAdV-2), canine coronavirus (CCoV), canine astrovirus (CaAstV), and canine rotavirus (CRV) - by real-time PCR. The most frequently detected virus was CPV-2, which was present in 64.8% of the samples (subtype 2a, 21.1%; 2b, 77.4%; 2c, 1.5%), followed by CDV (8%), CaAstV (7.2%), CCoV (5.9%), and CAdV-2 (4.6%). Two to four of these viruses in different combinations were found in 16.8% of the samples, and CRV was not detected. The complete genome sequences of Indian isolates of CDV, CCoV, and CaAstV were determined for the first time, and phylogenetic analysis was performed. This study highlights the need for routine prophylactic vaccination with the appropriate vaccines. Notably, 70.3% of animals vaccinated with DHPPiL were found to be positive for at least one virus. Hence, regular molecular analysis of the prevalent viruses is crucial for addressing vaccination failures.
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Affiliation(s)
- Anusha Dema
- grid.506065.0Department of Veterinary Biotechnology, College of Veterinary Science, PVNRTVU, Rajendranagar, Hyderabad, 500030 India
| | - Mounika Reddy Tallapally
- grid.506065.0Department of Veterinary Biotechnology, College of Veterinary Science, PVNRTVU, Rajendranagar, Hyderabad, 500030 India
| | - Vishweshwar Kumar Ganji
- grid.506065.0Department of Veterinary Biotechnology, College of Veterinary Science, PVNRTVU, Rajendranagar, Hyderabad, 500030 India
| | - Bhagyalakshmi Buddala
- grid.506065.0Department of Veterinary Biotechnology, College of Veterinary Science, PVNRTVU, Rajendranagar, Hyderabad, 500030 India
| | - Haritha Kodi
- grid.506065.0Department of Veterinary Biotechnology, College of Veterinary Science, PVNRTVU, Rajendranagar, Hyderabad, 500030 India
| | - Ashwini Ramidi
- grid.506065.0Department of Veterinary Biotechnology, College of Veterinary Science, PVNRTVU, Rajendranagar, Hyderabad, 500030 India
| | - Narasimha Reddy Yella
- grid.506065.0Department of Veterinary Biotechnology, College of Veterinary Science, PVNRTVU, Rajendranagar, Hyderabad, 500030 India
| | - Kalyani Putty
- Department of Veterinary Biotechnology, College of Veterinary Science, PVNRTVU, Rajendranagar, Hyderabad, 500030, India.
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Mira F, Puleio R, Schirò G, Condorelli L, Di Bella S, Chiaramonte G, Purpari G, Cannella V, Balboni A, Randazzo V, Antoci F, Vicari D, Guercio A. Study on the Canine Adenovirus Type 1 (CAdV-1) Infection in Domestic Dogs in Southern Italy. Pathogens 2022; 11:1254. [PMID: 36365005 PMCID: PMC9693395 DOI: 10.3390/pathogens11111254] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 10/25/2022] [Accepted: 10/27/2022] [Indexed: 07/29/2023] Open
Abstract
Canine adenovirus type 1 (CAdV-1) is the causative agent of a systemic and potentially fatal viral disease of domestic and wild canids. In Italy, CAdV-1 infection has also been occasionally described in dogs, but information on the epidemiology and its genomic features is still limited. A study was conducted on 291 dogs suspected of infectious gastrointestinal disease. Samples collected from dogs in southern Italy between 2017 and 2020 were analyzed. Virological and histopathological assays were carried out. The presence of CAdVs and other canine viral enteropathogens was investigated, and sequence and phylogenetic analyses were performed. CAdV-1 was detected in six (2.1%) dead stray dogs alone or in mixed infections with other viruses. Gross lesions and histopathological findings referred to CAdV infection were observed, also involving the central nervous system tissues. All inoculated samples were successfully isolated. Sequence analysis evidenced divergences with the circulating strains previously described in Italy and a closer relation with older CAdV-1 strains collected from other countries, suggesting a genetic heterogeneity of CAdV-1 in Italy. The evidence of the circulation of CAdV-1 and its genomic features allows us to have more in-depth knowledge of the epidemiology and evolution of the CAdV-1 genomic variants.
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Affiliation(s)
- Francesco Mira
- Istituto Zooprofilattico Sperimentale della Sicilia “A. Mirri”, Via Gino Marinuzzi n. 3, 90129 Palermo, Italy
| | - Roberto Puleio
- Istituto Zooprofilattico Sperimentale della Sicilia “A. Mirri”, Via Gino Marinuzzi n. 3, 90129 Palermo, Italy
| | - Giorgia Schirò
- Istituto Zooprofilattico Sperimentale della Sicilia “A. Mirri”, Via Gino Marinuzzi n. 3, 90129 Palermo, Italy
| | - Lucia Condorelli
- Istituto Zooprofilattico Sperimentale della Sicilia “A. Mirri”, Via Gino Marinuzzi n. 3, 90129 Palermo, Italy
| | - Santina Di Bella
- Istituto Zooprofilattico Sperimentale della Sicilia “A. Mirri”, Via Gino Marinuzzi n. 3, 90129 Palermo, Italy
| | - Gabriele Chiaramonte
- Istituto Zooprofilattico Sperimentale della Sicilia “A. Mirri”, Via Gino Marinuzzi n. 3, 90129 Palermo, Italy
| | - Giuseppa Purpari
- Istituto Zooprofilattico Sperimentale della Sicilia “A. Mirri”, Via Gino Marinuzzi n. 3, 90129 Palermo, Italy
| | - Vincenza Cannella
- Istituto Zooprofilattico Sperimentale della Sicilia “A. Mirri”, Via Gino Marinuzzi n. 3, 90129 Palermo, Italy
| | - Andrea Balboni
- Department of Veterinary Medical Sciences, Alma Mater Studiorum—University of Bologna, Ozzano dell’Emilia, 40064 Bologna, Italy
| | - Vincenzo Randazzo
- Istituto Zooprofilattico Sperimentale della Sicilia “A. Mirri”, Via Gino Marinuzzi n. 3, 90129 Palermo, Italy
| | - Francesco Antoci
- Istituto Zooprofilattico Sperimentale della Sicilia “A. Mirri”, Via Gino Marinuzzi n. 3, 90129 Palermo, Italy
| | - Domenico Vicari
- Istituto Zooprofilattico Sperimentale della Sicilia “A. Mirri”, Via Gino Marinuzzi n. 3, 90129 Palermo, Italy
| | - Annalisa Guercio
- Istituto Zooprofilattico Sperimentale della Sicilia “A. Mirri”, Via Gino Marinuzzi n. 3, 90129 Palermo, Italy
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Kim Y, Lee S, Kim Y, Na E, Park J, Oem J. Genetic Characteristics of Canine Adenovirus Type 2 Detected in Wild Raccoon Dogs (Nyctereutes procyonoides) in Korea (2017–2020). Vet Sci 2022; 9:591. [DOI: 10.3390/vetsci9110591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 10/23/2022] [Accepted: 10/24/2022] [Indexed: 11/16/2022] Open
Abstract
Adenovirus has been detected in a wide range of hosts like dogs, foxes, horses, bats, avian animals, and raccoon dogs. Canine adenoviruses with two serotypes host mammals and are members of the mastadenovirus family. Canine adenovirus type 1 (CAdV-1) and canine adenovirus type 2 (CAdV-2) cause infectious canine hepatitis and infectious bronchial disease, respectively. In this study, we investigated the prevalence of CAdV-1 and 2 in wild Nyctereutes procyonoides in Korea in 2017–2020 from 414 tissue samples, including the liver, kidney, lung, and intestine, collected from 105 raccoon dog carcasses. Only CAdV-2 was detected in two raccoon dogs, whereas CAdV-1 was not detected. Tissue samples from raccoon dogs were screened for CAdV-1 and CAdV-2 using conventional PCR. Adenovirus was successfully isolated from PCR positive samples using the Vero cell line, and the full-length gene sequence of the isolated viruses was obtained through 5’ and 3’ rapid amplification of cDNA ends (RACE). The major genes of the isolated CAdV-2/18Ra54 and CAdV-2/18Ra-65 strains showed the closest relationship with that of the CAdV-2 Toronto A26/61 strain isolated from Canada in 1976. There is no large mutation between CAdV-2, which is prevalent worldwide, and CAdV-2, which is prevalent in wild animals in Korea. In addition, it is still spreading and causing infections. The Toronto A26/61 strain, which showed the most similarity to CAdV-2/18Ra-54, was likely transmitted to wild animals through vaccinated companion animals, suggesting that further research is needed on safety measures surrounding animal vaccination. This study provides information on the genetic characteristics and prevalence of canine adenovirus in domestic wild animals and provides a better understanding of canine adenovirus.
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Zhu Y, Xu J, Lian S, Zhang R, Hou J, Wang M, Yan X. Difference Analysis Between Canine Adenovirus Types 1 And 2. Front Cell Infect Microbiol 2022; 12:854876. [PMID: 35360116 PMCID: PMC8963759 DOI: 10.3389/fcimb.2022.854876] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 02/21/2022] [Indexed: 11/13/2022] Open
Abstract
Canine adenoviruses (CAdVs) include type 1 (CAdV-1, virulent strain) and type 2 (CAdV-2, attenuated strain). In recent years, the incidences of CAdV infections are increasing. However, they are difficult to distinguish when the symptoms are untypical. It is pivotal to find the differences between the two virus types for scientific, epidemiological, and specific treatment. CAdV-1 (virulent strain) and CAdV-2 (attenuated strain) induced canine hepatitis (ICH) and tracheobronchitis (ITB), respectively, but the clinical symptom is not obvious. CAdV-1 and CAdV-2 have the same genome structure, diameter, morphological features, and cytopathic features, but the same character hinder the diagnose time of the serotypes. CAdV-1 and CAdV-2 have a difference in the genome sequence, coding proteins, viral activity, hemagglutination patterns. After infection, pathogenicity and transmission route are different between the two serotypes. Sequence alignment, PCR, Real time-PCR assay are useful methods to distinguish the two serotypes. The attenuated live CAdV-2 vaccine is currently used to protect against CAdV-1, but it also has a risk. The further research should focus on the pathogenicity mechanism and the useful vaccine for the two serotypes of canine adenovirus.
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Affiliation(s)
- Yanzhu Zhu
- Institute of Special Animal and Plant Sciences of Chinese Academy of Agricultural Sciences, Changchun, China
- College of Traditional Chinese Medicine, Jilin Agricultural University, Changchun, China
- *Correspondence: Yanzhu Zhu,
| | - Jinfeng Xu
- Institute of Special Animal and Plant Sciences of Chinese Academy of Agricultural Sciences, Changchun, China
| | - Shizhen Lian
- Institute of Special Animal and Plant Sciences of Chinese Academy of Agricultural Sciences, Changchun, China
| | - Rui Zhang
- Institute of Special Animal and Plant Sciences of Chinese Academy of Agricultural Sciences, Changchun, China
- College of Traditional Chinese Medicine, Jilin Agricultural University, Changchun, China
| | - Jinyu Hou
- College of Traditional Chinese Medicine, Jilin Agricultural University, Changchun, China
| | - Minchun Wang
- Institute of Special Animal and Plant Sciences of Chinese Academy of Agricultural Sciences, Changchun, China
| | - Xijun Yan
- Institute of Special Animal and Plant Sciences of Chinese Academy of Agricultural Sciences, Changchun, China
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Chander V, Sharma GK, Bhatt M, Nandi S, Mahajan S, Singh M, Mahendran K, Karikalan M, Pawde AM, Gupta V, Singh KP, Rajak KK, Gupta VK, Singh RK. Isolation and genetic characterization of canine adenovirus type 2 from a domestic dog showing neurological symptoms. Braz J Microbiol 2021; 52:2521-2528. [PMID: 34128211 PMCID: PMC8203211 DOI: 10.1007/s42770-021-00540-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 06/07/2021] [Indexed: 11/04/2022] Open
Abstract
Canine adenoviruses (CAVs) are of two types: canine adenovirus type 1 (CAV-1), which causes infectious canine hepatitis, and canine adenovirus type 2 (CAV-2), which is mainly associated with the respiratory type of disease in dogs. Due to the widespread use of modified live vaccines to control canine adenoviral infections and subsequently reduced disease incidence, CAVs are often neglected by clinicians. Although a number of studies are available about CAV-1 prevalence in India, only meagre information is available about CAV-2. This study reports the CAV-2 infection in a vaccinated dog with neurological and respiratory symptoms which was found negative for other canine pathogens like canine distemper virus and canine parvovirus. The virus was successfully isolated from rectal swab in MDCK cells and characterized by immunofluorescence assay and virus neutralization test. On phylogenetic analysis of partial E3 region, the Indian CAV-2 grouped in a separate clade different from established subgroups. An insertion of "G" nucleotide was reported at nucleotide (nt.) position 1077 in the E3 gene of Indian CAV-2 isolates which led to a frameshift in the coding region of E3 gene thereby imparting additional eleven amino acids to its C-terminal end in comparison to isolates from other parts of the world. This may have an implication on the functional role of E3 protein inside the cell. This study reinforces the unique signature insertion in the E3 gene of Indian CAV-2 and is the second study in the world to report the association of CAV-2 with neurological disease in dogs.
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Affiliation(s)
- Vishal Chander
- Virology Laboratory, Centre for Animal Disease Research and Diagnosis (CADRAD), ICAR-Indian Veterinary Research Institute (IVRI), Izatnagar, Bareilly, Uttar Pradesh, 243122, India.
| | - G K Sharma
- Virology Laboratory, Centre for Animal Disease Research and Diagnosis (CADRAD), ICAR-Indian Veterinary Research Institute (IVRI), Izatnagar, Bareilly, Uttar Pradesh, 243122, India
| | - Mukesh Bhatt
- ICAR Research Complex for NEH Region, Sikkim Centre, Tadong, Gangtok, Sikkim, 737102, India
| | - Sukdeb Nandi
- Virology Laboratory, Centre for Animal Disease Research and Diagnosis (CADRAD), ICAR-Indian Veterinary Research Institute (IVRI), Izatnagar, Bareilly, Uttar Pradesh, 243122, India
| | - S Mahajan
- Division of Veterinary Biotechnology, ICAR-IVRI, Izatnagar, Bareilly, Uttar Pradesh, 243122, India
| | - Mithilesh Singh
- Immunology Section, ICAR-IVRI, Izatnagar, Bareilly, Uttar Pradesh, 243122, India
| | - K Mahendran
- Referral Veterinary Polyclinic, ICAR-IVRI, Izatnagar, Bareilly, Uttar Pradesh, 243122, India
| | - M Karikalan
- Centre for Wildlife, ICAR-IVRI, Izatnagar, Bareilly, Uttar Pradesh, 243122, India
| | - Abhijit M Pawde
- Division of Veterinary Surgery, ICAR-IVRI, Izatnagar, Bareilly, Uttar Pradesh, 243122, India
| | - Vikas Gupta
- CCS National Institute of Animal Health, Baghpat, Uttar Pradesh, 250609, India
| | - K P Singh
- Pathology Laboratory, CADRAD, ICAR-IVRI, Izatnagar, Bareilly, Uttar Pradesh, 243122, India
| | - K K Rajak
- Divison of Biological Products, ICAR-IVRI, Izatnagar, Bareilly, Uttar Pradesh, 243122, India
| | - V K Gupta
- CADRAD, ICAR-IVRI, Izatnagar, Bareilly, Uttar Pradesh, 243122, India.
| | - R K Singh
- ICAR-IVRI, Izatnagar, Bareilly, Uttar Pradesh, 243122, India
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Balboni A, Terrusi A, Urbani L, Troia R, Stefanelli SAM, Giunti M, Battilani M. Canine circovirus and Canine adenovirus type 1 and 2 in dogs with parvoviral enteritis. Vet Res Commun 2021; 46:223-232. [PMID: 34671910 PMCID: PMC8528481 DOI: 10.1007/s11259-021-09850-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 10/10/2021] [Indexed: 12/11/2022]
Abstract
Canine parvovirus type 2 (CPV-2) is one of the most relevant pathogens associated with enteritis in dogs and is frequently reported in association with the detection of other pathogens in faeces. In this study the concomitant presence of Canine circovirus (CanineCV) and Canine adenovirus (CAdV) DNA in faecal or intestine samples of 95 dogs with parvovirus enteritis sampled in Italy (1995–2017) was investigated and the viruses identified were genetically characterised. Potential correlations with the antigenic variant of CPV-2 and with signalment data and outcome were evaluated. Twenty-eight of 95 (29.5%) CPV-2 infected dogs tested positive to other viruses: 7/28 were also positive to CanineCV, 1/28 to CAdV-1, 18/28 to CAdV-2, 1/28 to CanineCV and CAdV-2, and 1/28 to CAdV-1 and CAdV-2. The frequency of CAdV DNA detection and coinfections was significantly higher in purebred dogs compared to mixed breed ones (P = 0.002 and 0.009, respectively). The presence of coinfection was not associated with any other relevant data available, including CPV-2 variant and final outcome. The detection of CanineCV in a dog sampled in 2009 allowed to backdating its circulation in dogs. The eight CanineCV completely sequenced were phylogenetically related to the CanineCV identified in dogs, wolves and a badger from Europe, USA, Argentina and China. Nine CAdV were partially sequenced and phylogenetic analysis showed a separate branch for the oldest CAdV-2 identified (1995). From the results obtained in this study population, CanineCV and CAdV coinfections in dogs with parvoviral enteritis did not result in more severe disease.
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Affiliation(s)
- Andrea Balboni
- Department of Veterinary Medical Sciences, Alma Mater Studiorum - University of Bologna, Ozzano dell'Emilia (BO), Italy
| | - Alessia Terrusi
- Department of Veterinary Medical Sciences, Alma Mater Studiorum - University of Bologna, Ozzano dell'Emilia (BO), Italy
| | - Lorenza Urbani
- Department of Veterinary Medical Sciences, Alma Mater Studiorum - University of Bologna, Ozzano dell'Emilia (BO), Italy
| | - Roberta Troia
- Department of Veterinary Medical Sciences, Alma Mater Studiorum - University of Bologna, Ozzano dell'Emilia (BO), Italy
| | - Silvia A M Stefanelli
- Department of Veterinary Medical Sciences, Alma Mater Studiorum - University of Bologna, Ozzano dell'Emilia (BO), Italy
| | - Massimo Giunti
- Department of Veterinary Medical Sciences, Alma Mater Studiorum - University of Bologna, Ozzano dell'Emilia (BO), Italy
| | - Mara Battilani
- Department of Veterinary Medical Sciences, Alma Mater Studiorum - University of Bologna, Ozzano dell'Emilia (BO), Italy.
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Wang S, Wang C, Ren X, Xue W, He H, Zhu Y, Wang H, Wang G, Cai X. Identification of Two Novel Linear Neutralizing Epitopes within the Hexon Protein of Canine Adenovirus Using Monoclonal Antibodies. Vaccines (Basel) 2021; 9:135. [PMID: 33567652 DOI: 10.3390/vaccines9020135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 02/02/2021] [Accepted: 02/04/2021] [Indexed: 11/30/2022] Open
Abstract
Canine adenovirus (CAdV) has a high prevalence in canine populations. High affinity neutralizing antibodies against conserved epitopes can provide protective immunity against CAdV and protect against future outbreaks. In this study, we identified two CAdV-2-specific neutralizing monoclonal antibodies (mAbs), 2C1 and 7D7, which recognized two linear-dependent epitopes. MAb 2C1 potently neutralized CAdV-2 with a 50% neutralization titer (NT50) of 4096, and mAb 7D7 partially neutralized CAdV-2 with a 50% NT50 of 64. Immunoprecipitation, Western blot and protein spectral analysis indicated that both neutralizing mAbs recognized the hexon protein (Hex) of CAdV-2. Through a 12-mer random peptide phage display and synthetic peptides analysis, we finely mapped the neutralizing epitopes to two 10-amino acid (aa) peptides within the CAdV Hex: 634RIKQRETPAL643 located on the surface region; and 736PESYKDRMYS745 located in the inner region of the expected 3D structure of trimeric Hex. Importantly, the two epitopes are highly conserved among all CAdV isolates by sequence alignment analysis. Thus, these results provide insights into the interaction between virus and mAbs at the aa level and may have potential applications in the development of novel therapeutic or epitope-based vaccines, antibody therapeutics and a diagnostic method suitable for the rapid detection of all CAdVs.
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Oleaga A, Balseiro A, Espí A, Royo LJ. Wolf (Canis lupus) as canine adenovirus type 1 (CAdV-1) sentinel for the endangered cantabrian brown bear (Ursus arctos arctos). Transbound Emerg Dis 2021; 69:516-523. [PMID: 33527683 DOI: 10.1111/tbed.14010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 01/20/2021] [Accepted: 01/25/2021] [Indexed: 11/30/2022]
Abstract
Canine adenovirus type 1 (CAdV-1) causes infectious canine hepatitis (ICH) and has recently been described as a cause of death among endangered populations of European brown bear (Ursus arctos arctos) in the Cantabrian mountain range in Asturias, Spain. Sympatric wild and domestic carnivores can act as reservoirs of the virus and likely spread it into the environment and subsequently transmit it to brown bears. The present work investigates the prevalence and geo-temporal distribution of CAdV-1 among free-ranging wolves (Canis lupus) in Asturias from 2009 to 2018, during which three fatal cases of ICH were reported among brown bears in the region. A total of 149 wolves were analysed in this study, of which 21 (14%) were found to have CAdV-1 DNA based on real-time polymerase chain reaction (RT-PCR) of spleen samples. Prevalence of the virus was similar between males and females. All but one of the 20 CAdV-1-positive animals of estimable age were younger than 2 years, and only one of the 46 adult animals (>2 years) tested positive. Prevalence was highest in the western area of Asturias and during 2010 and 2011. Our results confirm that CAdV-1 is circulating in Asturian free-ranging wolves, supporting their possible role as virus reservoirs and sentinels in the region of this emerging disease in brown bears.
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Affiliation(s)
- Alvaro Oleaga
- Sociedad de Servicios del Principado de Asturias S.A. (SERPA), La Laboral, Gijón, Spain
| | - Ana Balseiro
- Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad de León, León, Spain.,Departamento de Sanidad Animal, Instituto de Ganadería de Montaña (CSIC-Universidad de León), Grulleros, León, Spain
| | - Alberto Espí
- Servicio Regional de Investigación y Desarrollo Agroalimentario (SERIDA), Centro de Biotecnología Animal, Gijón, Spain
| | - Luis J Royo
- Servicio Regional de Investigación y Desarrollo Agroalimentario (SERIDA), Centro de Biotecnología Animal, Gijón, Spain
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11
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Bergmann M, Holzheu M, Zablotski Y, Speck S, Truyen U, Hartmann K. Evaluation of a Point-of-Care Test for Pre-Vaccination Testing to Detect Antibodies against Canine Adenoviruses in Dogs. Viruses 2021; 13:v13020183. [PMID: 33530411 PMCID: PMC7911502 DOI: 10.3390/v13020183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 01/19/2021] [Accepted: 01/20/2021] [Indexed: 11/16/2022] Open
Abstract
(1) Background: Antibody testing is commonly used to assess a dog's immune status. For detection of antibodies against canine adenoviruses (CAVs), one point-of-care (POC) test is available. This study assessed the POC test´s performance. (2) Methods: Sera of 198 privately owned dogs and 40 specific pathogen-free (SPF) dogs were included. The reference standard for detection of anti-CAV antibodies was virus neutralization (VN) using CAV-1 and CAV-2 antigens. Specificity, sensitivity, positive predictive value (PPV), negative predictive value (NPV), and overall accuracy (OA) of the POC test were assessed. Specificity was considered most important. (3) Results: Prevalence of CAV-1 neutralizing antibodies (≥10) was 76% (182/238) in all dogs, 92% (182/198) in the subgroup of privately owned dogs, and 0% (0/40) in SPF dogs. Prevalence of CAV-2 neutralizing antibodies (≥10) was 76% (181/238) in all dogs, 91% (181/198) in privately owned dogs, and 0% (0/40) in SPF dogs. Specificity for detection of CAV-1 antibodies was lower (overall dogs, 88%; privately owned dogs, 56%; SPF dogs, 100%) compared with specificity for detection of CAV-2 antibodies (overall dogs, 90%; privately owned dogs, 65%; SPF dogs, 100%). (4) Conclusions: Since false positive results will lead to potentially unprotected dogs not being vaccinated, specificity should be improved to reliably detect anti-CAV antibodies that prevent infectious canine hepatitis in dogs.
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Affiliation(s)
- Michèle Bergmann
- Clinic of Small Animal Medicine, Centre for Clinical Veterinary Medicine, LMU Munich, Veterinaerstrasse 13, 80539 Munich, Germany; (Y.Z.); (K.H.)
- Correspondence: ; Tel.: +49-89-2180-2651
| | - Mike Holzheu
- Clinic of Small Animal Surgery and Reproduction, Centre for Clinical Veterinary Medicine, LMU Munich, Veterinaerstrasse 13, 80539 Munich, Germany;
| | - Yury Zablotski
- Clinic of Small Animal Medicine, Centre for Clinical Veterinary Medicine, LMU Munich, Veterinaerstrasse 13, 80539 Munich, Germany; (Y.Z.); (K.H.)
| | - Stephanie Speck
- Institute of Animal Hygiene and Veterinary Public Health, University of Leipzig, An den Tierkliniken 1, 04103 Leipzig, Germany; (S.S.); (U.T.)
| | - Uwe Truyen
- Institute of Animal Hygiene and Veterinary Public Health, University of Leipzig, An den Tierkliniken 1, 04103 Leipzig, Germany; (S.S.); (U.T.)
| | - Katrin Hartmann
- Clinic of Small Animal Medicine, Centre for Clinical Veterinary Medicine, LMU Munich, Veterinaerstrasse 13, 80539 Munich, Germany; (Y.Z.); (K.H.)
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12
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Bergmann M, Freisl M, Zablotski Y, Speck S, Truyen U, Hartmann K. Antibody Response to Canine Adenovirus-2 Virus Vaccination in Healthy Adult Dogs. Viruses 2020; 12:E1198. [PMID: 33096809 DOI: 10.3390/v12101198] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 10/13/2020] [Accepted: 10/16/2020] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Re-vaccination against canine adenovirus (CAV) is performed in ≤3-year-intervals but their necessity is unknown. The study determined anti-CAV antibodies within 28 days of re-vaccination and factors associated with the absence of antibodies and vaccination response. METHODS Ninety-seven healthy adult dogs (last vaccination ≥12 months) were re-vaccinated with a modified live CAV-2 vaccine. Anti-CAV antibodies were measured before vaccination (day 0), and after re-vaccination (day 7, 28) by virus neutralization. A ≥4-fold titer increase was defined as vaccination response. Fisher's exact test and multivariate regression analysis were performed to determine factors associated with the absence of antibodies and vaccination response. RESULTS Totally, 87% of dogs (90/97; 95% CI: 85.61-96.70) had anti-CAV antibodies (≥10) before re-vaccination. Vaccination response was observed in 6% of dogs (6/97; 95% CI: 2.60-13.11). Time since last vaccination (>3-5 years, OR = 9.375, p = 0.020; >5 years, OR= 25.000, p = 0.006) was associated with a lack of antibodies. Dogs from urban areas were more likely to respond to vaccination (p = 0.037). CONCLUSION Many dogs had anti-CAV pre-vaccination antibodies, even those with an incomplete vaccination series. Most dogs did not respond to re-vaccination. Based on this study, dogs should be re-vaccinated every 3 years or antibodies should be determined.
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13
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Ji J, Li W, Hu W, Xu X, Kan Y, Yao L, Bi Y, Xie Q. Novel Genotype Definition and the First Epidemiological Investigation of Canine Adenovirus Type 2 in Dogs in Central China. Front Vet Sci 2020; 7:534. [PMID: 32974402 PMCID: PMC7466760 DOI: 10.3389/fvets.2020.00534] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 07/09/2020] [Indexed: 01/22/2023] Open
Abstract
Infections caused by canine adenovirus (CAdV) type 1 have been reported worldwide in the past two decades. However, only few studies have specifically reported the prevalence of CAdV type 2 (CAdV-2). The present study investigated the persistent circulation of CAdV-2 in dogs with diarrhea in the Henan, Hubei, and Jiangsu provinces in central China from 2017 to 2019. We conducted polymerase chain reaction for detecting CAdV-2 and other related pathogens in 224 rectal swabs of pet dogs and the co-infection of canine diseases was also analyzed. In addition, the structural protein genes-Fiber, Hexon, and Penton-of the isolated CAdV-2 strains were sequenced and analyzed. The similarity between Hexon and Penton among the 19 strains was 97.4%, as revealed by sequence alignment. Multiple sequence alignment results showed that the Fiber gene sequences of these CAdV-2 strains shared 97.4-99.8% nucleotide and 94.1-99.3% amino acid identity with reference sequences and shared only 79.0-80.5% nucleotide and 77.3-80.5% amino acid identity with the vaccine strain CLL, indicating that Fiber harbored most of the variant sites. Furthermore, pairwise sequence comparisons of Hexon of CH-JS-1901 and CH-HN-1801 with that of India2006 revealed a novel genotype. Furthermore, protein model prediction showed that the amino acid mutation of fiber protein in 19 strains was located in the head region, that may cause structural changes on the surface of the fiber protein. These findings are of significance for monitoring the epidemiology of CAdV-2 infection and developing a novel vaccine which contribute to understanding genetic evolution of CAdV-2 in China.
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Affiliation(s)
- Jun Ji
- Henan Provincial Engineering Laboratory of Insects Bio-Reactor, Henan Provincial Engineering and Technology Center of Health Products for Livestock and Poultry, Henan Provincial Engineering and Technology Center of Animal Disease Diagnosis and Integrated Control, Nanyang Normal University, Nanyang, China
| | - Wanyu Li
- Henan Provincial Engineering Laboratory of Insects Bio-Reactor, Henan Provincial Engineering and Technology Center of Health Products for Livestock and Poultry, Henan Provincial Engineering and Technology Center of Animal Disease Diagnosis and Integrated Control, Nanyang Normal University, Nanyang, China
| | - Wen Hu
- Henan Provincial Engineering Laboratory of Insects Bio-Reactor, Henan Provincial Engineering and Technology Center of Health Products for Livestock and Poultry, Henan Provincial Engineering and Technology Center of Animal Disease Diagnosis and Integrated Control, Nanyang Normal University, Nanyang, China
| | - Xin Xu
- Henan Provincial Engineering Laboratory of Insects Bio-Reactor, Henan Provincial Engineering and Technology Center of Health Products for Livestock and Poultry, Henan Provincial Engineering and Technology Center of Animal Disease Diagnosis and Integrated Control, Nanyang Normal University, Nanyang, China
| | - Yunchao Kan
- Henan Provincial Engineering Laboratory of Insects Bio-Reactor, Henan Provincial Engineering and Technology Center of Health Products for Livestock and Poultry, Henan Provincial Engineering and Technology Center of Animal Disease Diagnosis and Integrated Control, Nanyang Normal University, Nanyang, China
| | - Lunguang Yao
- Henan Provincial Engineering Laboratory of Insects Bio-Reactor, Henan Provincial Engineering and Technology Center of Health Products for Livestock and Poultry, Henan Provincial Engineering and Technology Center of Animal Disease Diagnosis and Integrated Control, Nanyang Normal University, Nanyang, China
| | - Yingzuo Bi
- College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Qingmei Xie
- College of Animal Science, South China Agricultural University, Guangzhou, China
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Ramidi A, Ganji VK, Buddala B, Yella NR, Manthani GP, Putty K. E3 Gene-Based Genetic Characterization of Canine Adenovirus-2 Isolated from Cases of Canine Gastroenteritis in India Revealed a Novel Group of the Virus. Intervirology 2020; 62:216-221. [PMID: 32259812 DOI: 10.1159/000507329] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Accepted: 03/17/2020] [Indexed: 11/19/2022] Open
Abstract
Canine adenovirus (CAV) circulates as two distinct serotypes, CAV-1 and CAV-2, which are antigenically related but differ in their clinical manifestations. CAV is one of the important viral agents in the etiology of canine gastroenteritis. Here, we report the molecular surveillance and genetic characterization of CAV from clinical cases of canine gastroenteritis. A total of 302 fecal/rectal swabs were collected from dogs presented with gastroenteritis at various clinics in and around Hyderabad, India during 2018-19. These samples were tested for CAV using polymerase chain reaction with primers designed for the CAV E3 gene and the virus was isolated from positive samples. CAV-2 nucleic acid was present in 4.9% of the test samples. The partial sequence analyses of the E3 gene of the CAV-2 isolates revealed a frameshift mutation by insertion of nucleotide "G" at 1077 position of E3 gene, which resulted in an extension of the polypeptide chain by eleven amino acids. As a result, isolates from the current study formed a novel group, and the virus that was previously subdivided into two groups worldwide is now categorized under three. The study identifies a novel group of CAV-2 circulating in India providing an updated information regarding CAV-2.
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Affiliation(s)
- Ashwini Ramidi
- Departments of Veterinary Microbiology and Veterinary Biotechnology, College of Veterinary Science, PVNRTVU, Hyderabad, India
| | - Vishweshwar Kumar Ganji
- Departments of Veterinary Microbiology and Veterinary Biotechnology, College of Veterinary Science, PVNRTVU, Hyderabad, India
| | - Bhagyalakshmi Buddala
- Departments of Veterinary Microbiology and Veterinary Biotechnology, College of Veterinary Science, PVNRTVU, Hyderabad, India
| | - Narasimha Reddy Yella
- Departments of Veterinary Microbiology and Veterinary Biotechnology, College of Veterinary Science, PVNRTVU, Hyderabad, India
| | - Gnana Prakash Manthani
- Department of Animal Genetics and Breeding, College of Veterinary Science, PVNRTVU, Hyderabad, India
| | - Kalyani Putty
- Departments of Veterinary Microbiology and Veterinary Biotechnology, College of Veterinary Science, PVNRTVU, Hyderabad, India,
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15
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Day MJ, Carey S, Clercx C, Kohn B, MarsilIo F, Thiry E, Freyburger L, Schulz B, Walker DJ. Aetiology of Canine Infectious Respiratory Disease Complex and Prevalence of its Pathogens in Europe. J Comp Pathol 2020; 176:86-108. [PMID: 32359641 PMCID: PMC7103302 DOI: 10.1016/j.jcpa.2020.02.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 02/10/2020] [Accepted: 02/09/2020] [Indexed: 12/24/2022]
Abstract
The canine infectious respiratory disease complex (CIRDC) is an endemic worldwide syndrome involving multiple viral and bacterial pathogens. Traditionally, Bordetella bronchiseptica (Bb), canine adenovirus type 2 (CAV-2), canine distemper virus (CDV), canine herpesvirus (CHV) and canine parainfluenza virus (CPiV) were considered the major causative agents. Lately, new pathogens have been implicated in the development of CIRDC, namely canine influenza virus (CIV), canine respiratory coronavirus (CRCoV), canine pneumovirus (CnPnV), Mycoplasma cynos and Streptococcus equi subspecies zooepidemicus. To better understand the role of the different pathogens in the development of CIRDC and their epidemiological relevance in Europe, prevalence data were collected from peer-reviewed publications and summarized. Evidence of exposure to Bb is frequently found in healthy and diseased dogs and client-owned dogs are as likely to be infected as kennelled dogs. Co-infections with viral pathogens are common. The findings confirm that Bb is an important cause of CIRDC in Europe. CAV-2 and CDV recovery rates from healthy and diseased dogs are low and the most likely explanation for this is control through vaccination. Seroconversion to CHV can be demonstrated following CIRDC outbreaks and CHV has been detected in the lower respiratory tract of diseased dogs. There is some evidence that CHV is not a primary cause of CIRDC, but opportunistically re-activates at the time of infection and exacerbates the disease. The currently available data suggest that CIV is, at present, neither a prevalent nor a significant pathogen in Europe. CPiV remains an important pathogen in CIRDC and facilitates co-infection with other viral and bacterial pathogens. CnPnV and CRCoV are important new elements in the aetiology of CIRDC and spread particularly well in multi-dog establishments. M. cynos is common in Europe and is more likely to occur in younger and kennelled dogs. This organism is frequently found together with other CIRDC pathogens and is significantly associated with more severe respiratory signs. S. zooepidemicus infection is not common and appears to be a particular problem in kennels. Protective immunity against respiratory diseases is rarely complete, and generally only a reduction in clinical signs and excretion of pathogen can be achieved through vaccination. However, even vaccines that only reduce and do not prevent infection carry epidemiological advantages. They reduce spread, increase herd immunity and decrease usage of antimicrobials. Recommending vaccination of dogs against pathogens of CIRDC will directly provide epidemiological advantages to the population and the individual dog.
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Affiliation(s)
- M J Day
- School of Veterinary and Life Sciences, Murdoch University, Murdoch, Western Australia and Bristol Veterinary School, University of Bristol, Langford, UK.
| | - S Carey
- College of Veterinary Medicine, Michigan State University, USA
| | - C Clercx
- Faculty of Veterinary Medicine, Liège University, Liège, Belgium
| | - B Kohn
- Faculty of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - F MarsilIo
- Faculty of Veterinary Medicine, University of Teramo, Teramo, Italy
| | - E Thiry
- Faculty of Veterinary Medicine, Liège University, Liège, Belgium
| | - L Freyburger
- Université de Lyon, VetAgro Sup, Agressions Pulmonaires et Circulatoires dans le Sepsis, Marcy l'Etoile and La Compagnie des Animaux, SantéVet, Lyon, France
| | - B Schulz
- Ludwig-Maximillian-University of Munich, Munich, Germany
| | - D J Walker
- Anderson Moores Veterinary Specialists, Winchester, Hampshire, UK
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16
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Balboni A, Tryland M, Mørk T, Killengreen ST, Fuglei E, Battilani M. Unique genetic features of canine adenovirus type 1 (CAdV-1) infecting red foxes (Vulpes vulpes) in northern Norway and arctic foxes (Vulpes lagopus) in Svalbard. Vet Res Commun 2019; 43:67-76. [DOI: 10.1007/s11259-019-09746-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 02/15/2019] [Indexed: 10/27/2022]
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17
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Needle DB, Selig MK, Jackson KA, Delwart E, Tighe E, Leib SL, Seuberlich T, Pesavento PA. Fatal bronchopneumonia caused by skunk adenovirus 1 in an African pygmy hedgehog. J Vet Diagn Invest 2018; 31:103-106. [PMID: 30475680 DOI: 10.1177/1040638718812123] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Eleven adult African pygmy hedgehogs ( Atelerix albiventris) were added to a group of 35 animals, and within 10 d, respiratory distress affected 8 of 35 resident animals in the group, but none of the introduced animals. Three animals died following onset of clinical signs. Tissues from one animal were collected and submitted for histopathology, which revealed acute necrotizing bronchopneumonia and tracheitis with intraepithelial intranuclear inclusion bodies. Electron microscopy identified 75-90 nm diameter encapsulated icosahedral virions. Degenerate nested PCR analysis identified adenovirus within the affected lung tissue. Deep sequencing showed 100% homology to skunk adenovirus 1 (SkAdV-1). Adenoviruses are usually species-adapted and -specific, but our case supports the single previous report of non-skunk infection with SkAdV-1, indicating that this virus can infect other species, and further shows that it can cause fatal disease.
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Affiliation(s)
- David B Needle
- New Hampshire Veterinary Diagnostic Laboratory, College of Life Sciences and Agriculture, University of New Hampshire, Durham, NH (Needle).,Massachusetts General Hospital, Boston MA (Selig).,Vetsuisse Faculty (Seuberlich).,Institute for Infectious Diseases (Leib).,University of Bern, Bern, Switzerland; Plymouth Animal Hospital, Plymouth, NH (Tighe).,Blood Systems Research Institute, and Department of Laboratory Medicine, University of California, San Francisco, CA (Delwart).,School of Veterinary Medicine, University of California, Davis, CA (Pesavento, Jackson)
| | - Martin K Selig
- New Hampshire Veterinary Diagnostic Laboratory, College of Life Sciences and Agriculture, University of New Hampshire, Durham, NH (Needle).,Massachusetts General Hospital, Boston MA (Selig).,Vetsuisse Faculty (Seuberlich).,Institute for Infectious Diseases (Leib).,University of Bern, Bern, Switzerland; Plymouth Animal Hospital, Plymouth, NH (Tighe).,Blood Systems Research Institute, and Department of Laboratory Medicine, University of California, San Francisco, CA (Delwart).,School of Veterinary Medicine, University of California, Davis, CA (Pesavento, Jackson)
| | - Kenneth A Jackson
- New Hampshire Veterinary Diagnostic Laboratory, College of Life Sciences and Agriculture, University of New Hampshire, Durham, NH (Needle).,Massachusetts General Hospital, Boston MA (Selig).,Vetsuisse Faculty (Seuberlich).,Institute for Infectious Diseases (Leib).,University of Bern, Bern, Switzerland; Plymouth Animal Hospital, Plymouth, NH (Tighe).,Blood Systems Research Institute, and Department of Laboratory Medicine, University of California, San Francisco, CA (Delwart).,School of Veterinary Medicine, University of California, Davis, CA (Pesavento, Jackson)
| | - Eric Delwart
- New Hampshire Veterinary Diagnostic Laboratory, College of Life Sciences and Agriculture, University of New Hampshire, Durham, NH (Needle).,Massachusetts General Hospital, Boston MA (Selig).,Vetsuisse Faculty (Seuberlich).,Institute for Infectious Diseases (Leib).,University of Bern, Bern, Switzerland; Plymouth Animal Hospital, Plymouth, NH (Tighe).,Blood Systems Research Institute, and Department of Laboratory Medicine, University of California, San Francisco, CA (Delwart).,School of Veterinary Medicine, University of California, Davis, CA (Pesavento, Jackson)
| | - Ellyn Tighe
- New Hampshire Veterinary Diagnostic Laboratory, College of Life Sciences and Agriculture, University of New Hampshire, Durham, NH (Needle).,Massachusetts General Hospital, Boston MA (Selig).,Vetsuisse Faculty (Seuberlich).,Institute for Infectious Diseases (Leib).,University of Bern, Bern, Switzerland; Plymouth Animal Hospital, Plymouth, NH (Tighe).,Blood Systems Research Institute, and Department of Laboratory Medicine, University of California, San Francisco, CA (Delwart).,School of Veterinary Medicine, University of California, Davis, CA (Pesavento, Jackson)
| | - Stephen L Leib
- New Hampshire Veterinary Diagnostic Laboratory, College of Life Sciences and Agriculture, University of New Hampshire, Durham, NH (Needle).,Massachusetts General Hospital, Boston MA (Selig).,Vetsuisse Faculty (Seuberlich).,Institute for Infectious Diseases (Leib).,University of Bern, Bern, Switzerland; Plymouth Animal Hospital, Plymouth, NH (Tighe).,Blood Systems Research Institute, and Department of Laboratory Medicine, University of California, San Francisco, CA (Delwart).,School of Veterinary Medicine, University of California, Davis, CA (Pesavento, Jackson)
| | - Torsten Seuberlich
- New Hampshire Veterinary Diagnostic Laboratory, College of Life Sciences and Agriculture, University of New Hampshire, Durham, NH (Needle).,Massachusetts General Hospital, Boston MA (Selig).,Vetsuisse Faculty (Seuberlich).,Institute for Infectious Diseases (Leib).,University of Bern, Bern, Switzerland; Plymouth Animal Hospital, Plymouth, NH (Tighe).,Blood Systems Research Institute, and Department of Laboratory Medicine, University of California, San Francisco, CA (Delwart).,School of Veterinary Medicine, University of California, Davis, CA (Pesavento, Jackson)
| | - Patricia A Pesavento
- New Hampshire Veterinary Diagnostic Laboratory, College of Life Sciences and Agriculture, University of New Hampshire, Durham, NH (Needle).,Massachusetts General Hospital, Boston MA (Selig).,Vetsuisse Faculty (Seuberlich).,Institute for Infectious Diseases (Leib).,University of Bern, Bern, Switzerland; Plymouth Animal Hospital, Plymouth, NH (Tighe).,Blood Systems Research Institute, and Department of Laboratory Medicine, University of California, San Francisco, CA (Delwart).,School of Veterinary Medicine, University of California, Davis, CA (Pesavento, Jackson)
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Sánchez D, Cesarman-Maus G, Amador-Molina A, Lizano M. Oncolytic Viruses for Canine Cancer Treatment. Cancers (Basel) 2018; 10:cancers10110404. [PMID: 30373251 PMCID: PMC6266482 DOI: 10.3390/cancers10110404] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 10/16/2018] [Accepted: 10/23/2018] [Indexed: 12/17/2022] Open
Abstract
Oncolytic virotherapy has been investigated for several decades and is emerging as a plausible biological therapy with several ongoing clinical trials and two viruses are now approved for cancer treatment in humans. The direct cytotoxicity and immune-stimulatory effects make oncolytic viruses an interesting strategy for cancer treatment. In this review, we summarize the results of in vitro and in vivo published studies of oncolytic viruses in different phases of evaluation in dogs, using PubMed and Google scholar as search platforms, without time restrictions (to date). Natural and genetically modified oncolytic viruses were evaluated with some encouraging results. The most studied viruses to date are the reovirus, myxoma virus, and vaccinia, tested mostly in solid tumors such as osteosarcomas, mammary gland tumors, soft tissue sarcomas, and mastocytomas. Although the results are promising, there are issues that need addressing such as ensuring tumor specificity, developing optimal dosing, circumventing preexisting antibodies from previous exposure or the development of antibodies during treatment, and assuring a reasonable safety profile, all of which are required in order to make this approach a successful therapy in dogs.
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Affiliation(s)
- Diana Sánchez
- Unidad de Investigación Biomédica en Cáncer, Instituto Nacional de Cancerología-Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City 14080, Mexico.
| | - Gabriela Cesarman-Maus
- Department of Hematology, Instituto Nacional de Cancerología, Mexico City 14080, Mexico.
| | - Alfredo Amador-Molina
- Unidad de Investigación Biomédica en Cáncer, Instituto Nacional de Cancerología-Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City 14080, Mexico.
| | - Marcela Lizano
- Unidad de Investigación Biomédica en Cáncer, Instituto Nacional de Cancerología-Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City 14080, Mexico.
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Dowgier G, Lahoreau J, Lanave G, Losurdo M, Varello K, Lucente MS, Ventriglia G, Bozzetta E, Martella V, Buonavoglia C, Decaro N. Sequential circulation of canine adenoviruses 1 and 2 in captive wild carnivores, France. Vet Microbiol 2018; 221:67-73. [PMID: 29981710 PMCID: PMC7172945 DOI: 10.1016/j.vetmic.2018.05.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 05/30/2018] [Accepted: 05/30/2018] [Indexed: 11/24/2022]
Abstract
Two canine adenoviruses (CAdVs) were found to circulate sequentially in captive wild carnivores in France. CAdV-1 caused the death of a Eurasian wolf (Canis lupus lupus) with gross lesions and histopathological changes compatible with infectious canine hepatitis. CAdV-2 was subsequently found to circulate subclinically in other carnivores of the same zoological park. Analysis of the full-length genome of the wolf CAdV-1 strain showed a high genetic relatedness with an Italian strain detected in the same species. Future studies are needed to assess the CAdV ecology in endangered wild carnivores.
Scarce data are currently available about the ecology of canine adenoviruses (CAdVs) in wild carnivores. In this paper, the consecutive circulation of CAdV-1 and CAdV-2 in wild carnivores maintained in a French zoological park is reported. A fatal CAdV-1 infection was observed in a Eurasian wolf (Canis lupus lupus), which displayed gross lesions, histopathological changes and immunohistochemical findings suggestive of CAdV-1 infection. The virus was isolated on cell cultures and its genome was determined through next-generation sequencing, resulting genetically related to a recent Italian CAdV-1 strain detected in an Italian wolf. Subsequently, subclinical circulation of CAdV-2 was demonstrated by molecular methods in wild carnivores maintained in the same zoological park, some of which had been previously vaccinated with a CAdV-2 vaccine. Virus detection at a long distance from vaccination and by unvaccinated animals was suggestive of infection by a CAdV-2 field strain, although no data are available about the extent and duration of shedding of CAdV-2 modified-live virus in wild or domestic carnivores. The present paper provides new insights into the CAdV ecology in wildlife, although future studies are needed to fully understand the pathogenic potential of both CAdVs especially in endangered carnivore species.
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Affiliation(s)
- Giulia Dowgier
- Department of Veterinary Medicine, University of Bari, Valenzano, Bari, Italy; The Pirbright Institute, Pirbright, Woking, UK
| | | | - Gianvito Lanave
- Department of Veterinary Medicine, University of Bari, Valenzano, Bari, Italy
| | - Michele Losurdo
- Department of Veterinary Medicine, University of Bari, Valenzano, Bari, Italy
| | - Katia Varello
- Istituto Zooprofilattico Sperimentale di Piemonte, Liguria e Valle d'Aosta, Torino, Italy
| | | | - Gianluca Ventriglia
- Department of Veterinary Medicine, University of Bari, Valenzano, Bari, Italy
| | - Elena Bozzetta
- Istituto Zooprofilattico Sperimentale di Piemonte, Liguria e Valle d'Aosta, Torino, Italy
| | - Vito Martella
- Department of Veterinary Medicine, University of Bari, Valenzano, Bari, Italy
| | - Canio Buonavoglia
- Department of Veterinary Medicine, University of Bari, Valenzano, Bari, Italy
| | - Nicola Decaro
- Department of Veterinary Medicine, University of Bari, Valenzano, Bari, Italy.
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Hechinger S, Scheffold S, Hamann HP, Zschöck M. Detection of canine adenovirus 1 in red foxes (Vulpes vulpes) and raccoons (Procyon lotor) in Germany with a TaqMan real-time PCR assay. J Vet Diagn Invest 2017; 29:741-746. [DOI: 10.1177/1040638717712331] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
We developed a real-time (rt)PCR assay based on TaqMan probe technology for the specific detection of canine adenovirus 1 (CAdV-1). The assay is able to detect three 50% tissue culture infectious dose/mL in CAdV-1–containing cell culture supernatant. Viral genomes were not amplified of canine adenovirus 2 or of several bovine, porcine, and avian adenoviruses. In silico analysis provided no indication of amplification of other heterologous genomes. The sensitivity of the real-time assay exceeded that of a conventional gel-based CAdV-1 PCR by a factor of 100. Following the integration of the novel PCR into the Hessian wildlife-monitoring program, CAdV-1 DNA was detected in none of the tested raccoons ( n = 48) but in 11 of 97 foxes.
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Affiliation(s)
- Silke Hechinger
- Hessian State Laboratory, Department of Veterinary Medicine, Giessen, Germany
| | - Svenja Scheffold
- Hessian State Laboratory, Department of Veterinary Medicine, Giessen, Germany
| | - Hans-Peter Hamann
- Hessian State Laboratory, Department of Veterinary Medicine, Giessen, Germany
| | - Michael Zschöck
- Hessian State Laboratory, Department of Veterinary Medicine, Giessen, Germany
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Balboni A, Dondi F, Agnoli C, Verin R, Gruarin M, Morini M, Battilani M. Novel sequence variants of viral hexon and fibre genes in two dogs with canine adenovirus type 1-associated disease. Vet J 2017; 223:73-5. [PMID: 28671077 DOI: 10.1016/j.tvjl.2017.05.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 05/24/2017] [Accepted: 05/25/2017] [Indexed: 11/23/2022]
Abstract
There is little information on sequence variation of canine adenovirus type 1 (CAdV-1), the aetiological agent of infectious canine hepatitis (ICH). This study reports hexon and fibre gene sequence variants of CAdV-1 in a dog with systemic ICH and a dog with the ocular form of the disease ('blue eye') in Northern Italy in 2013. One of the sequence variants matched a CAdV-1 fox sequence previously detected in Italy.
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Pizzurro F, Marcacci M, Zaccaria G, Orsini M, Cito F, Rosamilia A, Di Renzo L, Malatesta D, Di Sabatino D, Lorusso A. Genome Sequence of Canine Adenovirus Type 1 Isolated from a Wolf ( Canis lupus) in Southern Italy. Genome Announc 2017; 5:e00225-17. [PMID: 28428308 DOI: 10.1128/genomeA.00225-17] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Canine adenovirus type 1 (CAdV-1), a DNA virus of the family Adenoviridae, causes infectious canine hepatitis, a highly contagious disease primarily affecting canids. In this report, we describe the isolation and whole-genome sequence of a CAdV-1 isolate from the liver of a free-ranging wolf (Canis lupus).
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Walker D, Fee SA, Hartley G, Learmount J, O'Hagan MJ, Meredith AL, de C Bronsvoort BM, Porphyre T, Sharp CP, Philbey AW. Serological and molecular epidemiology of canine adenovirus type 1 in red foxes (Vulpes vulpes) in the United Kingdom. Sci Rep 2016; 6:36051. [PMID: 27796367 DOI: 10.1038/srep36051] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 10/11/2016] [Indexed: 11/09/2022] Open
Abstract
Canine adenovirus type 1 (CAV-1) causes infectious canine hepatitis (ICH), a frequently fatal disease which primarily affects canids. In this study, serology (ELISA) and molecular techniques (PCR/qPCR) were utilised to investigate the exposure of free-ranging red foxes (Vulpes vulpes) to CAV-1 in the United Kingdom (UK) and to examine their role as a wildlife reservoir of infection for susceptible species. The role of canine adenovirus type 2 (CAV-2), primarily a respiratory pathogen, was also explored. In foxes with no evidence of ICH on post-mortem examination, 29 of 154 (18.8%) red foxes had inapparent infections with CAV-1, as detected by a nested PCR, in a range of samples, including liver, kidney, spleen, brain, and lung. CAV-1 was detected in the urine of three red foxes with inapparent infections. It was estimated that 302 of 469 (64.4%) red foxes were seropositive for canine adenovirus (CAV) by ELISA. CAV-2 was not detected by PCR in any red foxes examined. Additional sequence data were obtained from CAV-1 positive samples, revealing regional variations in CAV-1 sequences. It is concluded that CAV-1 is endemic in free-ranging red foxes in the UK and that many foxes have inapparent infections in a range of tissues.
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Dowgier G, Mari V, Losurdo M, Larocca V, Colaianni ML, Cirone F, Lucente MS, Martella V, Buonavoglia C, Decaro N. A duplex real-time PCR assay based on TaqMan technology for simultaneous detection and differentiation of canine adenovirus types 1 and 2. J Virol Methods 2016; 234:1-6. [PMID: 27040113 DOI: 10.1016/j.jviromet.2016.03.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 03/21/2016] [Accepted: 03/24/2016] [Indexed: 11/25/2022]
Abstract
Canine adenoviruses are a major cause of disease in dogs, coyotes, red foxes and wolves, as well as in other carnivores and marine mammals. Canine adenovirus type 1 (CAdV-1) and canine adenovirus type 2 (CAdV-2) cause infectious canine hepatitis (ICH) and infectious tracheobronchitis (ITB), respectively. In this study, a duplex real-time PCR assay for simultaneous detection and characterisation of CAdV-1 and CAdV-2 was developed by using a single primer pair and virus-specific probes. The assay was validated testing standard DNAs produced on purpose and clinical samples of various matrices known to be positive for CAdV-1, CAdV-2 or both viruses. Precise calculation of DNA loads in samples containing a wide range of viral amounts was allowed by generating a standard curve for absolute quantification. The assay was proven to be highly specific, since no cross-reactions with the different CAdV type was observed, and sensitive, being able to detect less than 10 copies of CAdV-1/CAdV-2 DNA. The low intra-assay and interassay coefficient of variations demonstrated a high repeatability, thus confirming the potential use of this assay for quantitative detection of CAdV-1 and CAdV-2 for rapid diagnosis and epidemiological investigations.
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Affiliation(s)
- Giulia Dowgier
- Department of Veterinary Medicine, University of Bari, Strada per Casamassima Km 3, 70010 Valenzano, Bari, Italy
| | - Viviana Mari
- Department of Veterinary Medicine, University of Bari, Strada per Casamassima Km 3, 70010 Valenzano, Bari, Italy
| | - Michele Losurdo
- Department of Veterinary Medicine, University of Bari, Strada per Casamassima Km 3, 70010 Valenzano, Bari, Italy
| | - Vittorio Larocca
- Istituto Zooprofilattico Sperimentale di Puglia e Basilicata, via Manfredonia 20, 71100 Foggia, Italy
| | - Maria Loredana Colaianni
- Istituto Zooprofilattico Sperimentale di Puglia e Basilicata, via Manfredonia 20, 71100 Foggia, Italy
| | - Francesco Cirone
- Department of Veterinary Medicine, University of Bari, Strada per Casamassima Km 3, 70010 Valenzano, Bari, Italy
| | - Maria Stella Lucente
- Department of Veterinary Medicine, University of Bari, Strada per Casamassima Km 3, 70010 Valenzano, Bari, Italy
| | - Vito Martella
- Department of Veterinary Medicine, University of Bari, Strada per Casamassima Km 3, 70010 Valenzano, Bari, Italy
| | - Canio Buonavoglia
- Department of Veterinary Medicine, University of Bari, Strada per Casamassima Km 3, 70010 Valenzano, Bari, Italy; Istituto Zooprofilattico Sperimentale di Puglia e Basilicata, via Manfredonia 20, 71100 Foggia, Italy
| | - Nicola Decaro
- Department of Veterinary Medicine, University of Bari, Strada per Casamassima Km 3, 70010 Valenzano, Bari, Italy.
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Balboni A, Dondi F, Prosperi S, Battilani M. Development of a SYBR Green real-time PCR assay with melting curve analysis for simultaneous detection and differentiation of canine adenovirus type 1 and type 2. J Virol Methods 2015; 222:34-40. [PMID: 26028428 DOI: 10.1016/j.jviromet.2015.05.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Revised: 05/11/2015] [Accepted: 05/21/2015] [Indexed: 11/29/2022]
Abstract
Canine adenovirus type 1 (CAdV-1) and canine adenovirus type 2 (CAdV-2) cause infectious canine hepatitis (ICH) and infectious tracheobronchitis (ITB) in dogs, respectively. Cases of ICH have been documented in recent years and recent surveys have demonstrated a wide percentage of asymptomatic CAdV-1 infection in the canine population. Since both CAdV types are detectable in the same biological matrices, and viral coinfection with CAdV-1 and CAdV-2 are reported with high frequency, it is urgent to have available a rapid, highly sensitive and specific assay for the diagnosis of CAdV infection and distinction between CAdV-1 and CAdV-2. In order to detect canine adenovirus in biological samples and to rapidly distinguish the two viral types, a SYBR Green real-time PCR assay was optimized to discriminate CAdV-1 and CAdV-2 via a melting curve analysis. The developed assay showed high sensitivity and reproducibility and was highly efficient and specific in discriminating the two CAdV types. This reliable and rapid technique may represent a simple, useful and economic option for simultaneous CAdV types detection, which would be feasible and attractive for all diagnostic laboratories, both for clinical purposes and for epidemiological investigations.
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Affiliation(s)
- Andrea Balboni
- Department of Veterinary Medical Sciences, Alma Mater Studiorum-University of Bologna, Via Tolara di Sopra 50, 40064 Ozzano Emilia (BO), Italy
| | - Francesco Dondi
- Department of Veterinary Medical Sciences, Alma Mater Studiorum-University of Bologna, Via Tolara di Sopra 50, 40064 Ozzano Emilia (BO), Italy
| | - Santino Prosperi
- Department of Veterinary Medical Sciences, Alma Mater Studiorum-University of Bologna, Via Tolara di Sopra 50, 40064 Ozzano Emilia (BO), Italy
| | - Mara Battilani
- Department of Veterinary Medical Sciences, Alma Mater Studiorum-University of Bologna, Via Tolara di Sopra 50, 40064 Ozzano Emilia (BO), Italy.
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