Assessing the potential for Bluetongue virus 8 to spread and vaccination strategies in Scotland.

Assessing the potential for Bluetongue virus 8 to spread and vaccination strategies in Scotland.
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评估蓝色病毒8在苏格兰传播和疫苗接种策略的潜力。

DOI:
10.1038/srep38940
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发表时间:
2016-12-13
期刊:
影响因子:
4.6
通讯作者:
Bronsvoort BM
Bronsvoort BM
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Bessell PR;Searle KR;Auty HK;Handel IG;Purse BV;Bronsvoort BM

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自2006年以来,欧洲频繁爆发蓝舌病(BT),包括2015年法国中部爆发的BT病毒血清型8,该病毒在2016年继续在欧洲传播。因此,评估BTv-8传播的可能性并确定疫苗接种的最佳部署对于应急计划至关重要。我们开发了一个空间明确的数学模型BTV-8在苏格兰的传播,并探讨了传播的敏感性,缺乏详细的经验数据的关键疾病传播参数。在平均值的参数下,BTv-8在苏格兰几乎没有传播。然而,在“最坏情况”下,但仍然可行的情况下,参数处于其范围的极限,温度比平均值高1 °C,我们发现在5月中旬至6月中旬期间,苏格兰南部有203,000只绵羊感染了病毒。有战略针对性的疫苗干预可以大大减少BT传播。具体而言,尽管BT在绵羊中具有最大的临床影响,但我们表明,当对牛接种疫苗时,疫苗接种可以对减少绵羊中的BTV感染产生最大的影响,这对疾病控制政策具有影响。
Europe has seen frequent outbreaks of Bluetongue (BT) disease since 2006, including an outbreak of BT virus serotype 8 in central France during 2015 that has continued to spread in Europe during 2016. Thus, assessing the potential for BTv-8 spread and determining the optimal deployment of vaccination is critical for contingency planning. We developed a spatially explicit mathematical model of BTv-8 spread in Scotland and explored the sensitivity of transmission to key disease spread parameters for which detailed empirical data is lacking. With parameters at mean values, there is little spread of BTv-8 in Scotland. However, under a “worst case” but still feasible scenario with parameters at the limits of their ranges and temperatures 1 °C warmer than the mean, we find extensive spread with 203,000 sheep infected given virus introduction to the south of Scotland between mid-May and mid-June. Strategically targeted vaccine interventions can greatly reduce BT spread. Specifically, despite BT having most clinical impact in sheep, we show that vaccination can have the greatest impact on reducing BTv infections in sheep when administered to cattle, which has implications for disease control policy.
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