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Natural infection by Culex flavivirus in Culex quinquefasciatus mosquitoes captured in Cuiabá, Mato Grosso Mid-Western Brazil.
Medical and Veterinary Entomology ( IF 1.9 ) Pub Date : 2019-03-19 , DOI: 10.1111/mve.12374
O S Moraes 1 , B F Cardoso 1 , T A Pacheco 1 , A Z L Pinto 1 , M S Carvalho 1 , R C Hahn 1 , T C T Burlamaqui 2 , L F Oliveira 2 , R S Oliveira 2 , J M Vasconcelos 2 , P S Lemos 2 , M R T Nunes 2 , R D Slhessarenko 1
Affiliation  

New species of insect-specific viruses (ISV) have been reported worldwide. In the present study, the complete genome of Culex flavivirus (CxFV) and partial sequences of other ISVs in Culex quinquefasciatus Say 1823 females (n = 3425) sampled in 200 urban areas census tracts of Cuiaba, state of Mato Grosso, were identified via reverse transcriptase-polymerase chain reaction for a NS5 region of flaviviruses, nucleotide and high-throughput sequencing, and viral isolation in C6/36 cells. CxFV was detected in 16 of 403 mosquito pools; sequences found in the study presented a high similarity with isolates from São Paulo, Brazil and other countries in Latin American that belong to genotype II, supporting the geographical influence on CxFV evolution. The monthly maximum likelihood estimation for CxFV ranged from 1.81 to 9.94 per 1000 mosquitoes. In addition to the CxFV complete genome, one pool contained an ORF1 sequence (756 bp) that belongs to a novel Negevirus from the Sandewavirus supergroup most similar to the Santana virus (77.1%) and another pool presented an RNA-dependent RNA polymerase sequence (1081 bp) of a novel Rhabdovirus most similar to Wuhan mosquito virus 9 (44%). After three passages in C6/36 cells, only CxFV was isolated from these co-infected pools. The importance of ISVs relies on their possible ability to interfere with arbovirus replication in competent vectors.

中文翻译:

巴西马托格罗索州中部Cuiabá捕获的库蚊(Culex quinquefasciatus)蚊中库蚊黄病毒的自然感染。

全世界已经报道了新的昆虫特异性病毒(ISV)。在本研究中,通过反向鉴定鉴定了200个城市普查区库亚巴人口中的库克斯黄病毒(CxFV)的完整基因组和库克斯库克斯(Culex quinquefasciatus)说的1823例女性(n = 3425)中其他ISV的部分序列。黄病毒NS5区域的转录酶-聚合酶链反应,核苷酸和高通量测序以及C6 / 36细胞中的病毒分离。在403个蚊帐中的16个中检测到了CxFV。研究中发现的序列与圣保罗,巴西和拉丁美洲其他国家的基因型II的分离株具有高度相似性,支持了对CxFV进化的地理影响。CxFV的每月最大似然估计范围为每1000只蚊子1.81至9.94。除了CxFV完整基因组外,一个库包含一个ORF1序列(756 bp),该序列属于Sandewavirus超群的一种新型Negevirus,与桑塔纳病毒最相似(77.1%),另一个库具有RNA依赖性RNA聚合酶序列( 1081 bp)的新型弹状病毒最类似于武汉蚊子病毒9(44%)。在C6 / 36细胞中传代三遍后,仅从这些共同感染的库中分离出CxFV。ISV的重要性取决于它们可能干扰感受态载体中虫媒病毒复制的能力。1%)和另一个库显示了一种新型弹状病毒的RNA依赖性RNA聚合酶序列(1081 bp),与武汉蚊子病毒9最相似(44%)。在C6 / 36细胞中传代3次后,仅从这些共同感染的库中分离出CxFV。ISV的重要性取决于它们可能干扰感受态载体中虫媒病毒复制的能力。1%)和另一个库显示了一种新型弹状病毒的RNA依赖性RNA聚合酶序列(1081 bp),与武汉蚊子病毒9最相似(44%)。在C6 / 36细胞中传代三遍后,仅从这些共同感染的库中分离出CxFV。ISV的重要性取决于它们可能干扰感受态载体中虫媒病毒复制的能力。
更新日期:2019-11-01
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