Shiell Brian J, Ye Siying, Harper Jennifer A, van der Heide Brenda, Beddome Gary, Foord Adam J, Michalski Wojtek P, Bingham John, Peck Grantley R
CSIRO-Australian Animal Health Laboratory, East Geelong, Victoria, Australia.
J Vet Diagn Invest. 2020 Jul;32(4):577-580. doi: 10.1177/1040638720926476. Epub 2020 May 25.
Rift Valley fever virus (RVFV) causes Rift Valley fever (RVF), resulting in morbidity and mortality in humans and ruminants. Evidence of transboundary outbreaks means that RVFV remains a threat to human health and livestock industries in countries that are free from the disease. To enhance surveillance capability, methods for detection of RVFV are required. The generation of reagents suitable for the detection of RVFV antigen in formalin-fixed, paraffin-embedded tissues from infected animals have been developed and are described herein. Recombinant nucleoprotein (rNP) was expressed in and purified using immobilized metal ion affinity chromatography. Purified rNP was used as an immunogen to produce anti-NP polyclonal antisera in rabbits for use in detection of RVFV NP in experimentally infected animals by immunohistochemistry. Antisera raised in rabbits against rNP were able to recognize viral NP antigen in fixed infected Vero cell pellets and sheep liver. Therefore, the methods and reagents described herein are useful in assays for detection of RVFV infections in animals, for research and surveillance purposes.
裂谷热病毒(RVFV)可引发裂谷热(RVF),导致人类和反刍动物发病和死亡。跨境疫情的证据表明,RVFV对尚未出现该病的国家的人类健康和畜牧业仍然构成威胁。为提高监测能力,需要检测RVFV的方法。本文开发并描述了适用于检测来自感染动物的福尔马林固定、石蜡包埋组织中RVFV抗原的试剂的制备方法。重组核蛋白(rNP)在大肠杆菌中表达,并使用固定化金属离子亲和色谱法进行纯化。纯化后的rNP用作免疫原,在兔体内产生抗NP多克隆抗血清,用于通过免疫组织化学检测实验感染动物体内的RVFV NP。用rNP免疫兔产生的抗血清能够识别固定感染的Vero细胞沉淀和绵羊肝脏中的病毒NP抗原。因此,本文所述的方法和试剂可用于动物RVFV感染检测的分析,用于研究和监测目的。