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2009-2019 年台湾北部临床分离株的分子特征和毒力谱。

Molecular Characteristics and Virulence Profile of Clinical Isolates in Northern Taiwan, 2009-2019.

机构信息

Infectious Control Office, Tao-Yuan General Hospital, Ministry of Health and Welfare, Taoyuan, Taiwan.

Department of Laboratory Medicine, Tao-Yuan General Hospital, Ministry of Health and Welfare, Taoyuan, Taiwan.

出版信息

Foodborne Pathog Dis. 2024 Jun;21(6):386-394. doi: 10.1089/fpd.2023.0136. Epub 2024 Feb 12.

Abstract

is a critical foodborne pathogen that causes severe invasive and noninvasive diseases and is associated with high mortality. Information on the prevalence of infections in Taiwan is very limited. This study aimed to analyze the molecular epidemiological surveillance and virulence gene distribution of 176 human clinical isolates collected between 2009 and 2019 in northern Taiwan. Our results showed that the isolates belonged to 4 serogroups (IIa, IIb, IVb, and IIc), with most isolates in serogroups IIa (81/176, 46%) and IIb (71/176, 40.3%). Multilocus sequence typing analysis revealed 18 sequence types (STs) and 13 clonal complexes (CCs). Eighty-four percent of all isolates belonged to six STs: CC87-ST87 (40/176, 22.7%), CC19-ST378 (36/176, 19.9%), CC155-ST155 (28/176, 15.5%), CC1-ST710 (16/176, 8.8%), CC5-ST5 (16/176, 8.8%), and CC101-ST101 (11/176, 6.1%). Furthermore, our analysis showed the distributions of four pathogenicity islands (LIPI) among all isolates. LIPI-1 and LIPI-2 existed in all isolates, whereas LIPI-3 and LIPI-4 only existed in specific STs and CCs. LIPI-3 existed in the STs, CC1-ST710, CC3-ST3, CC288-ST295, and CC191-ST1458, whereas LIPI-4 could be found in the STs, CC87-ST87 and CC87-ST1459. Strains containing LIPI-3 and LIPI-4 are potentially hypervirulent; thus, 68/176 isolates (39.1%) collected in this study were potentially hypervirulent. Since infections are considered highly correlated with diet, molecular epidemiological surveillance of in food is important; continued surveillance will provide critical information to prevent foodborne diseases.

摘要

是一种重要的食源性致病菌,可引起严重的侵袭性和非侵袭性疾病,并与高死亡率相关。关于台湾地区 感染的流行情况的信息非常有限。本研究旨在分析 2009 年至 2019 年间在台湾北部采集的 176 株人类临床 分离株的分子流行病学监测和毒力基因分布。我们的结果表明,这些分离株属于 4 个血清群(IIa、IIb、IVb 和 IIc),其中大多数分离株属于血清群 IIa(81/176,46%)和 IIb(71/176,40.3%)。多位点序列分型分析显示有 18 种序列类型(STs)和 13 个克隆复合体(CCs)。所有分离株中有 84%属于 6 种 STs:CC87-ST87(40/176,22.7%)、CC19-ST378(36/176,19.9%)、CC155-ST155(28/176,15.5%)、CC1-ST710(16/176,8.8%)、CC5-ST5(16/176,8.8%)和 CC101-ST101(11/176,6.1%)。此外,我们的分析显示所有分离株中存在 4 种 致病性岛(LIPI)。所有分离株中均存在 LIPI-1 和 LIPI-2,而 LIPI-3 和 LIPI-4 仅存在于特定的 STs 和 CCs 中。LIPI-3 存在于 STs、CC1-ST710、CC3-ST3、CC288-ST295 和 CC191-ST1458 中,而 LIPI-4 可以在 STs、CC87-ST87 和 CC87-ST1459 中找到。含有 LIPI-3 和 LIPI-4 的菌株具有潜在的高致病性;因此,本研究中采集的 176 株分离株中有 68 株(39.1%)具有潜在的高致病性。由于 感染被认为与饮食密切相关,因此对食品中的 进行分子流行病学监测非常重要;持续监测将提供预防食源性疾病的关键信息。

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