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Evaluation of a specialized filter-paper matrix for transportation of extended bovine semen to screen for bovine herpesvirus-1 by real-time PCR.
Sarangi, Laxmi Narayan; Naveena, Thodangala; Rana, Samir Kumar; Surendra, Kota Sri Naga Leela; Reddy, Rachamreddy Venkata Chandrasekhar; Bajibabu, Putla; Ponnanna, Nadikerianda Muthappa; Sharma, Girish Kumar; Srinivasan, Villuppanoor Alwar.
Afiliación
  • Sarangi LN; National Dairy Development Board Research and Development Laboratory, IIL Campus, Hyderabad 500032, Telangana, India.
  • Naveena T; National Dairy Development Board Research and Development Laboratory, IIL Campus, Hyderabad 500032, Telangana, India.
  • Rana SK; National Dairy Development Board, Anand 388001, Gujarat, India.
  • Surendra KSNL; National Dairy Development Board Research and Development Laboratory, IIL Campus, Hyderabad 500032, Telangana, India.
  • Reddy RVC; National Dairy Development Board Research and Development Laboratory, IIL Campus, Hyderabad 500032, Telangana, India.
  • Bajibabu P; National Dairy Development Board Research and Development Laboratory, IIL Campus, Hyderabad 500032, Telangana, India.
  • Ponnanna NM; National Dairy Development Board Research and Development Laboratory, IIL Campus, Hyderabad 500032, Telangana, India.
  • Sharma GK; National Dairy Development Board, Anand 388001, Gujarat, India.
  • Srinivasan VA; National Dairy Development Board Research and Development Laboratory, IIL Campus, Hyderabad 500032, Telangana, India. Electronic address: vasrini@nddb.coop.
J Virol Methods ; 257: 1-6, 2018 07.
Article en En | MEDLINE | ID: mdl-29588253
The extended frozen semen (EFS) batches produced from infectious bovine rhinotracheitis (IBR) sero-positive cattle and buffalo bulls housed in various semen stations in India are transported to the testing laboratory in liquid nitrogen (LN2) for screening bovine herpesvirus-1 (BoHV-1). This procedure is laborious and poses LN2 related hazards. An alternative logistics for transportation of samples was investigated. Use of Flinders Technology Associates (FTA®) elute card was evaluated for transportation of extended bovine semen to screen BoHV-1 DNA by real-time PCR targeting gB gene and the method was compared with the OIE approved Chelex resin based method. A protocol for extraction of BoHV-1 DNA from FTA® card spotted with extended semen was optimized. The viral DNA was found to be stable on FTA® card for at least 28 days when the cards are stored at 4°-37 °C. The analytical sensitivity for the assay was determined using variable dilutions of BoHV-1 spiked semen and positive plasmid harbouring gB gene (97bp) spotted onto FTA® card and it was found to be 100.8 TCID50/ml or 100 copies respectively in real-time PCR. The test could detect as low as 100.008 TCID50/ml or 1 copy of positive plasmid when more number of replicates (n = 6) of the same sample were tested. This sensitivity was found to be comparable to Chelex method and both the methods demonstrated a very strong correlation (r = 0.9774; 95% CI: 0.9620-0.9860) in terms of Ct value (p < 0.0001). The diagnostic sensitivity and specificity of the FTA method in comparison to the Chelex method was 83.08% (95% CI: 71.73%-91.24%) and 93.23% (95% CI: 89.38%-96.01%) respectively when 316 samples were screened by both the methods. The degree of agreement between these two tests was good (Kappa value: 0.738; 95% CI: 0.646-0.829). The method was found to be robust and highly repeatable in inter-assay and intra-assay precision testing. The result suggests that the FTA® card holds promise as an alternative system for transportation of EFS for downstream screening of BoHV-1 DNA.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Papel / Semen / Manejo de Especímenes / Enfermedades de los Bovinos / Infecciones por Herpesviridae / Herpesvirus Bovino 1 / Reacción en Cadena en Tiempo Real de la Polimerasa Tipo de estudio: Diagnostic_studies / Evaluation_studies / Guideline Límite: Animals País/Región como asunto: Asia Idioma: En Revista: J Virol Methods Año: 2018 Tipo del documento: Article País de afiliación: India Pais de publicación: Países Bajos

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Papel / Semen / Manejo de Especímenes / Enfermedades de los Bovinos / Infecciones por Herpesviridae / Herpesvirus Bovino 1 / Reacción en Cadena en Tiempo Real de la Polimerasa Tipo de estudio: Diagnostic_studies / Evaluation_studies / Guideline Límite: Animals País/Región como asunto: Asia Idioma: En Revista: J Virol Methods Año: 2018 Tipo del documento: Article País de afiliación: India Pais de publicación: Países Bajos