First Molecular Characterization of Bovine Leukemia Virus Infections in the Caribbean.

First Molecular Characterization of Bovine Leukemia Virus Infections in the Caribbean.
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DOI:
10.1371/journal.pone.0168379
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发表时间:
2016
期刊:
影响因子:
3.7
通讯作者:
Wang C
Wang C
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Yang Y;Kelly PJ;Bai J;Zhang R;Wang C

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牛白血病病毒(BLV)是一种引起地方性牛白血病的逆转录病毒。为了调查BLV的存在和遗传变异性在加勒比地区的第一次,我们进行荧光共振能量转移(FRET)-PCR的波尔的BLV从牛的全血DNA从多米尼加,蒙特塞拉特,尼维斯和圣基茨。采用标准PCR和env引物对阳性动物进行BLV系统发育分析。我们在多米尼加(5.2%; 4/77)和圣基茨(19.2%; 37/193)发现FRET-PCR阳性牛(12.6%,41/325),但在蒙特塞拉特(0%,0/12)或尼维斯(0%,0/43)未发现。阳性动物是集中饲养的农场中的奶牛。使用邻位连接(NJ)方法对从多米尼加(n = 2)和圣基茨(n = 5)获得的菌株和GenBank中可获得的菌株(n = 90)(基因型1-10)的部分和全长env序列进行系统发育分析,显示加勒比菌株属于基因型1(98-100%序列同源性)。我们的研究是加勒比地区BLV感染的第一个分子特征,也是该地区基因型1的第一个描述。
Bovine leukemia virus (BLV) is a retrovirus that causes enzootic bovine leucosis. To investigate the presence and genetic variability of BLV in the Caribbean for the first time, we preformed fluorescence resonance energy transfer (FRET)-PCR for the pol of BLV on DNA from whole blood of cattle from Dominica, Montserrat, Nevis and St. Kitts. Standard PCRs with primers for the env were used for phylogenetic analysis of BLV in positive animals. We found FRET-PCR positive cattle (12.6%, 41/325) on Dominica (5.2%; 4/77) and St. Kitts (19.2%; 37/193) but not on Montserrat (0%, 0/12) or Nevis (0%, 0/43). Positive animals were cows on farms where animals were raised intensively. Phylogenetic analysis using the neighbor-joining (NJ) method on partial and full-length env sequences obtained for strains from Dominica (n = 2) and St. Kitts (n = 5) and those available in GenBank (n = 90) (genotypes 1–10) revealed the Caribbean strains belonged to genotype 1 (98–100% sequence homology). Ours is the first molecular characterization of BLV infections in the Caribbean and the first description of genotype 1 in the region.
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