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Fonseca Júnior AA, de Freitas Passos ÉE, de Oliveira JS, Starling Rocha R, Laguardia-Nascimento M, de Souza Trindade G. Validation of molecular diagnostics for the detection of pseudocowpox virus. Braz J Microbiol 2022; 53:1077-1080. [PMID: 35220553 PMCID: PMC9151948 DOI: 10.1007/s42770-021-00664-3] [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: 11/16/2020] [Accepted: 12/24/2021] [Indexed: 02/01/2023] Open
Abstract
The pseudocowpox virus (PCPV) is recognized for causing exanthematic lesions in cattle and humans. The diagnosis is important because it is a zoonosis and its clinical signs can be confused with foot-and-mouth disease, a high-impact bovine disease in livestock. The objective of this work is to validate a SYBR Green qPCR and a conventional PCR for virus detection in bovine samples. Detection limit tests, repeatability, reproducibility, sensitivity, and specificity were compared. When two analysts were compared, results demonstrated that training and pipetting influence the repeatability. The qPCR was more sensitive than conventional PCR but showed nonspecific reactions distinguishable by the melting curve. Both showed high repeatability and reproducibility.
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Affiliation(s)
- Antônio Augusto Fonseca Júnior
- LANAGRO/MG - Ministério da AgriculturaPecuária e Abastecimento (MAPA), Pedro Leopoldo, MG, Brazil. .,UNIFEMM, Sete Lagoas, MG, Brazil.
| | | | - Jaqueline Silva de Oliveira
- Laboratório de Vírus, Instituto de Ciências Biológicas, Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG Brazil
| | | | | | - Giliane de Souza Trindade
- Laboratório de Vírus, Instituto de Ciências Biológicas, Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG Brazil
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2
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de Oliveira Lopes GA, Ferreira LR, de Souza Trindade G, Fonseca AA, Dos Reis JKP. qPCR assay for the detection of pseudocowpox virus. Arch Virol 2020; 166:243-247. [PMID: 33159590 DOI: 10.1007/s00705-020-04872-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 09/21/2020] [Indexed: 10/23/2022]
Abstract
Pseudocowpox is a zoonosis caused by pseudocowpox virus (PCPV), which mainly affects cows but can be an occupational disease of humans. The aim of the study was to validate a quantitative polymerase chain reaction (qPCR) assay for the detection of PCPV. The assay was able to detect up to 1000 copies of PCPV per µL in field samples, with a sensitivity of 80% and a specificity of 100%. We did not observe any cross-reactivity between PCPV-positive samples and samples that were positive for other genetically similar viruses. The repeatability and reproducibility were adequate according to parameters preestablished in official test validation manuals.
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Affiliation(s)
- Gabriel Augusto de Oliveira Lopes
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,Laboratório Federal de Defesa Agropecuária, Pedro Leopoldo, Brazil
| | | | - Giliane de Souza Trindade
- Departamento de Microbiologia, Instituto de Ciencias Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | | | - Jenner Karlisson Pimenta Dos Reis
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.
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3
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Souza FA, Dos Santos Júnior EM, Laguardia-Nascimento M, Freitas TRP, Damaso CR, Rivetti Júnior AV, Camargos MF, Fonseca Júnior AA. Validation of a real-time PCR assay for detection of swinepox virus. Arch Virol 2019; 164:3059-3063. [PMID: 31549301 DOI: 10.1007/s00705-019-04403-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Accepted: 08/14/2019] [Indexed: 10/25/2022]
Abstract
Swine are the only known hosts of swinepox virus (SWPV), the sole member of the genus Suipoxvirus, family Poxviridae. Rapid diagnosis is recommended for appropriate interventions because of the high morbidity associated with this virus. This study describes a real-time quantitative PCR (qPCR) assay for rapid detection and quantification of SWPV. The detection limit, repeatability, reproducibility, and specificity of this assay were determined. The efficiency was 96%, and the R2 value was 0.996. The detection limit was 1 fg or 10-0.5 TCID50/50 μL. Tests showed that the greatest source of error in the SWPV qPCR assay was variation between analysts rather than different qPCR kits or equipment. All nucleic acids from other viruses or samples collected from swine were negative in the specificity test. qPCR for SWPV is a new method with tested variables that allows main sources of error in laboratory diagnosis and viral quantification to be identified.
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Affiliation(s)
| | | | - Mateus Laguardia-Nascimento
- Laboratório Federal de Defesa Agropecuária de Minas Gerais, Avenida Rômulo Joviano, 26, Centro, Pedro Leopoldo, Minas Gerais, Brazil
| | - Tânia Rosária Pereira Freitas
- Laboratório Federal de Defesa Agropecuária de Minas Gerais, Avenida Rômulo Joviano, 26, Centro, Pedro Leopoldo, Minas Gerais, Brazil
| | | | - Anselmo V Rivetti Júnior
- Laboratório Federal de Defesa Agropecuária de Minas Gerais, Avenida Rômulo Joviano, 26, Centro, Pedro Leopoldo, Minas Gerais, Brazil
| | - Marcelo Fernandes Camargos
- Laboratório Federal de Defesa Agropecuária de Minas Gerais, Avenida Rômulo Joviano, 26, Centro, Pedro Leopoldo, Minas Gerais, Brazil
| | - Antônio Augusto Fonseca Júnior
- Laboratório Federal de Defesa Agropecuária de Minas Gerais, Avenida Rômulo Joviano, 26, Centro, Pedro Leopoldo, Minas Gerais, Brazil.
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Pinheiro de Oliveira TF, Laguardia-Nascimento M, Xavier FG, do Amaral Pinto C, Ferreira LR, de Castro Campos de Souza I, Hammerschmitt ME, Bianchi RM, Wronski JG, Etges RN, Rigon GM, Camargos MF, Júnior AVR, Fonseca Junior AA. Quantification of ovine herpesvirus 2 by digital PCR in an outbreak of malignant catarrhal fever. Arch Virol 2019; 164:3045-3050. [PMID: 31520217 DOI: 10.1007/s00705-019-04382-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Accepted: 07/24/2019] [Indexed: 11/28/2022]
Abstract
Infection with ovine gammaherpesvirus 2 (OvHV-2) is generally asymptomatic in sheep; however, when it crosses the species barrier, it causes malignant catarrhal fever (MCF) in cattle. In the present study, we developed a real-time PCR assay and a droplet digital PCR assay and use both methods to study an outbreak caused by OvHV-2. Both PCR methods showed high sensitivity and specificity and were able to detect low copy numbers of OvHV-2 in sheep and cattle. The present study describes the first digital PCR quantification of OvHV-2 genome copies in samples collected from sheep and cattle.
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Affiliation(s)
| | - Mateus Laguardia-Nascimento
- Laboratório Federal de Defesa Agropecuária de Minas Gerais, Pedro Leopoldo, Minas Gerais, CEP 33600-000, Brazil
| | - Fabiana Galtarossa Xavier
- Laboratório Federal de Defesa Agropecuária de Minas Gerais, Pedro Leopoldo, Minas Gerais, CEP 33600-000, Brazil
| | - Carla do Amaral Pinto
- Laboratório Federal de Defesa Agropecuária de Minas Gerais, Pedro Leopoldo, Minas Gerais, CEP 33600-000, Brazil
| | - Luciana Rabello Ferreira
- Laboratório Federal de Defesa Agropecuária de Minas Gerais, Pedro Leopoldo, Minas Gerais, CEP 33600-000, Brazil
| | | | | | | | | | - Rodrigo Nestor Etges
- Secretaria da Agricultura, Pecuária e Desenvolvimento Rural, Porto Alegre, Rio Grande do Sul, Brazil
| | - Grazziane Maciel Rigon
- Secretaria da Agricultura, Pecuária e Desenvolvimento Rural, Porto Alegre, Rio Grande do Sul, Brazil
| | - Marcelo Fernandes Camargos
- Laboratório Federal de Defesa Agropecuária de Minas Gerais, Pedro Leopoldo, Minas Gerais, CEP 33600-000, Brazil
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Vila AR, Briceño C, McAloose D, Seimon TA, Armién AG, Mauldin EA, Be NA, Thissen JB, Hinojosa A, Quezada M, Paredes J, Avendaño I, Silva A, Uhart MM. Putative parapoxvirus-associated foot disease in the endangered huemul deer (Hippocamelus bisulcus) in Bernardo O'Higgins National Park, Chile. PLoS One 2019; 14:e0213667. [PMID: 30995215 PMCID: PMC6469779 DOI: 10.1371/journal.pone.0213667] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 02/26/2019] [Indexed: 12/22/2022] Open
Abstract
The huemul (Hippocamelus bisulcus) is an endangered cervid endemic to southern Argentina and Chile. Here we report foot lesions in 24 huemul from Bernardo O’Higgins National Park, Chile, between 2005 and 2010. Affected deer displayed variably severe clinical signs, including lameness and soft tissue swelling of the limbs proximal to the hoof or in the interdigital space, ulceration of the swollen tissues, and some developed severe proliferative tissue changes that caused various types of abnormal wear, entrapment, and/or displacement of the hooves and/or dewclaws. Animals showed signs of intense pain and reduced mobility followed by loss of body condition and recumbency, which often preceded death. The disease affected both genders and all age categories. Morbidity and mortality reached 80% and 40%, respectively. Diagnostics were restricted to a limited number of cases from which samples were available. Histology revealed severe papillomatous epidermal hyperplasia and superficial dermatitis. Electron microscopy identified viral particles consistent with viruses in the Chordopoxvirinae subfamily. The presence of parapoxvirus DNA was confirmed by a pan-poxvirus PCR assay, showing high identity (98%) with bovine papular stomatitis virus and pseudocowpoxvirus. This is the first report of foot disease in huemul deer in Chile, putatively attributed to poxvirus. Given the high morbidity and mortality observed, this virus might pose a considerable conservation threat to huemul deer in Chilean Patagonia. Moreover, this report highlights a need for improved monitoring of huemul populations and synergistic, rapid response efforts to adequately address disease events that threaten the species.
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Affiliation(s)
| | - Cristóbal Briceño
- ConserLab, Department of Preventive Medicine, Faculty of Animal and Veterinary Sciences, Universidad de Chile, Santiago, Chile
| | - Denise McAloose
- Wildlife Conservation Society, Zoological Health Program, Bronx, NY, United States of America
| | - Tracie A. Seimon
- Wildlife Conservation Society, Zoological Health Program, Bronx, NY, United States of America
| | - Anibal G. Armién
- Ultrastructural Pathology Unit, Veterinary Diagnostic Laboratory, University of Minnesota, St. Paul, MN, United States of America
| | - Elizabeth A. Mauldin
- Department of Pathobiology, University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA, United States of America
| | - Nicholas A. Be
- Lawrence Livermore National Laboratory, Livermore, CA, United States of America
| | - James B. Thissen
- Lawrence Livermore National Laboratory, Livermore, CA, United States of America
| | - Ana Hinojosa
- Departamento de Áreas Silvestres Protegidas, Corporación Nacional Forestal, Chillán, Chile
| | - Manuel Quezada
- Departamento de Patología y Medicina Preventiva, Facultad de Ciencias Veterinarias, Universidad de Concepción, Chillán, Chile
| | - José Paredes
- Departamento de Áreas Silvestres Protegidas, Corporación Nacional Forestal, Punta Arenas, Chile
| | - Iván Avendaño
- Departamento de Áreas Silvestres Protegidas, Corporación Nacional Forestal, Punta Arenas, Chile
| | - Alejandra Silva
- Departamento de Áreas Silvestres Protegidas, Corporación Nacional Forestal, Punta Arenas, Chile
| | - Marcela M. Uhart
- One Health Institute, School of Veterinary Medicine, University of California, Davis, CA, United States of America
- * E-mail:
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Laguardia-Nascimento M, de Oliveira APF, Azevedo IC, Rivetti Júnior AV, Camargos MF, Fonseca Júnior AA. Spread of poxviruses in livestock in Brazil associated with cases of double and triple infection. Arch Virol 2017; 162:2797-2801. [PMID: 28516287 DOI: 10.1007/s00705-017-3407-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Accepted: 05/04/2017] [Indexed: 11/29/2022]
Abstract
The objective of this work is to describe the distribution of outbreaks of vaccinia virus (VACV), pseudocowpox virus (PCPV), and bovine papular stomatitis virus (BSPV) in Brazil. The Official Laboratory of the Brazilian Ministry of Agriculture received 89 samples from different locations in Brazil in 2015 and 2016 for diagnosis of vesicular and exanthematous disease. Poxvirus coinfections occurred in 11 out of 33 outbreaks, including the first reported triple infection by BPSV, PCPV, and VACV. This occurrence may be associated with the circulation of these viruses in Brazilian cattle.
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Affiliation(s)
- Mateus Laguardia-Nascimento
- Laboratório Nacional Agropecuário de Minas Gerais, Avenida Rômulo Joviano, Centro, Pedro Leopoldo, Minas Gerais, 33600-000, Brazil
| | - Ana Paula Ferreira de Oliveira
- Laboratório Nacional Agropecuário de Minas Gerais, Avenida Rômulo Joviano, Centro, Pedro Leopoldo, Minas Gerais, 33600-000, Brazil
| | - Isabela Ciarlini Azevedo
- Laboratório Nacional Agropecuário de Minas Gerais, Avenida Rômulo Joviano, Centro, Pedro Leopoldo, Minas Gerais, 33600-000, Brazil
| | | | - Marcelo Fernandes Camargos
- Laboratório Nacional Agropecuário de Minas Gerais, Avenida Rômulo Joviano, Centro, Pedro Leopoldo, Minas Gerais, 33600-000, Brazil
| | - Antônio Augusto Fonseca Júnior
- Laboratório Nacional Agropecuário de Minas Gerais, Avenida Rômulo Joviano, Centro, Pedro Leopoldo, Minas Gerais, 33600-000, Brazil.
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