Brown Charles R, Moore Amy T, Young Ginger R, Padhi Abinash, Komar Nicholas
Department of Biological Sciences, University of Tulsa, Tulsa, OK 74104, USA.
J Med Entomol. 2009 Mar;46(2):375-9. doi: 10.1603/033.046.0225.
Alphaviruses (Togaviridae) rarely have been found to be vertically transmitted from female arthropods to their progeny. We report two isolations of Buggy Creek virus (BCRV), an ecologically unusual alphavirus related to western equine encephalomyelitis virus, from field-collected eggs of cimicid swallow bugs (Oeciacus vicarius Horvath), the principal vector for BCRV. Ten percent of egg pools were positive for BCRV, and we estimated minimum infection rates to be 1.03 infected eggs per 1,000 tested. The results show potential vertical transmission of BCRV, represent one of the few isolations of any alphavirus from eggs or larvae of insects in the field, and are the first report of any virus in the eggs of cimicid bedbugs. The specialized ecological niche of BCRV in swallow bugs and at cliff swallow (Petrochelidon pyrrhonota Vieillot) nesting sites may promote vertical transmission of this virus.
很少发现甲病毒（披膜病毒科）能从雌性节肢动物垂直传播到其后代。我们报告了从野外采集的西咪臭虫（Oeciacus vicarius Horvath）卵中分离出两株巴吉溪病毒（BCRV），BCRV是一种与西部马脑炎病毒相关的生态上不寻常的甲病毒，而西咪臭虫是BCRV的主要传播媒介。10%的卵池BCRV呈阳性，我们估计最低感染率为每1000个检测卵中有1.03个感染卵。结果显示了BCRV存在垂直传播的可能性，是野外从昆虫卵或幼虫中分离出的少数几种甲病毒之一，也是关于西咪臭虫卵中存在任何病毒的首次报道。BCRV在臭虫以及崖燕（Petrochelidon pyrrhonota Vieillot）筑巢地的特殊生态位可能促进了该病毒的垂直传播。
