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Vet. Sci. 2019, 6(1), 2;

Sensitive SYBR Green—Real Time PCR for the Detection and Quantitation of Avian Rotavirus A

Department of Pathology, School of Veterinary Medicine, University of São Paulo, São Paulo 05508-270, Brazil
Author to whom correspondence should be addressed.
Received: 6 December 2018 / Revised: 21 December 2018 / Accepted: 25 December 2018 / Published: 29 December 2018
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Avian rotavirus A (ARtV-A) is a virus that affects young birds, causing acute diarrhea and economic losses in the poultry industry worldwide. The techniques used for the diagnosis of ARtV-A include electron microscopy, isolation in cell culture, and serology, as well as molecular techniques, such as the reverse transcription-polymerase chain reaction (RT-PCR). The objective of this work was to standardize a real-time RT-polymerase chain reaction (RT-qPCR) using SYBR Green chemistry for the rapid detection and quantification of ARtV-A from bird tissues and materials fixed on FTA cards on the basis of the nucleotide sequence of segment 6 (S6), which codes for the structural VP6 protein of ARtV-A. The results show the efficient amplification of the proposed target, with a limit of detection (LoD) of one copy gene (CG) per microliter of cDNA and a limit of quantification (LoQ) of 10 CGs per microliter. The efficiency of the primers was determined to be 95.66% using a standard curve, with an R2 value of 0.999 and a slope of −3.43. The specificity was determined using samples coinfected with ARtV-A, the chicken parvovirus, the chicken astrovirus, and the avian nephritis virus as positive controls and commercially available vaccines of the infectious bronchitis virus, infectious bursa disease virus, avian reovirus and healthy organs as negative controls. This technique, which lacks nonspecific PCR products and dimers, demonstrated greater sensitivity and specificity than conventional RT-PCR, and it reduced the analysis time by more than 50%. View Full-Text
Keywords: avian rotavirus; real-time PCR; RT-qPCR; SYBR Green avian rotavirus; real-time PCR; RT-qPCR; SYBR Green

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De la Torre, D.; Astolfi-Ferreira, C.S.; Chacon, R.D.; Piantino Ferreira, A.J. Sensitive SYBR Green—Real Time PCR for the Detection and Quantitation of Avian Rotavirus A. Vet. Sci. 2019, 6, 2.

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