Prevalence of Murray Valley encephalitis virus antibodies in northern Victoria following the 2023 outbreak: a cross-sectional serological survey.

Q3 Medicine
Marie Heloury, Joshua Szanyi, Maxwell Braddick, Alexander Fidao, Madeleine J Marsland, Tilda N Thomson, Mitch Batty, Suellen Nicholson, Theo Karapanagiotidis, Kylie S Carville, Anna-Jane Glynn-Robinson, Chuan Kok Lim, Naveen Tenneti, Anthony Zheng, William Cross, Jim Black, Helen O'Brien
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引用次数: 0

Abstract

Abstract: Following the first outbreak of Murray Valley encephalitis in Victoria, Australia, since 1974, a serological survey was conducted in 2023 and 2024 to estimate the seroprevalence of Murray Valley encephalitis virus (MVEV) antibodies among residents in the north of the state. Between October 2023 and April 2024, a total of 507 residents from 11 local government areas in northern Victoria - Mildura, Swan Hill, Campaspe, Gannawarra, Greater Bendigo, Loddon, Greater Shepparton, Moira, Wodonga, Wangaratta, and Indigo - were tested for MVEV total antibody. Seroprevalence was 2.0% (95% confidence interval: 1.1-3.6%), comparable to background levels of seropositivity prior to the 2023 outbreak. No strong associations were identified between a range of potential risk or protective factors and MVEV seropositivity. Low seroprevalence suggests that the population in this region remains immunologically vulnerable to MVEV infection. Ongoing vector control and efforts to prevent mosquito bites will be critical in preventing flavivirus transmission in northern Victoria during future mosquito seasons.

2023年爆发后维多利亚州北部默里谷脑炎病毒抗体的流行:横断面血清学调查
摘要:自1974年澳大利亚维多利亚州首次暴发墨利谷脑炎后,于2023年和2024年对该州北部居民进行了墨利谷脑炎病毒(MVEV)抗体的血清学调查。在2023年10月至2024年4月期间,来自维多利亚州北部米尔杜拉、天鹅山、坎帕佩、甘纳瓦拉、大本迪戈、洛登、大谢普顿、莫伊拉、沃东加、旺加拉塔和英迪格等11个地方政府地区的507名居民接受了MVEV总抗体检测。血清阳性率为2.0%(95%可信区间:1.1-3.6%),与2023年疫情爆发前的背景血清阳性水平相当。未发现一系列潜在风险或保护因素与MVEV血清阳性之间存在强烈关联。低血清流行率表明,该地区的人口在免疫上仍然易受MVEV感染。正在进行的病媒控制和防止蚊虫叮咬的努力对于在未来的蚊虫季节在维多利亚州北部预防黄病毒传播至关重要。
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来源期刊
CiteScore
1.90
自引率
0.00%
发文量
72
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