Chandra Meena, Lord Heidi, Fletcher-Lartey Stephanie, Alexander Kate, Egana Nilva, Conaty Stephen
Public Health Unit, South Western Sydney Local Health District, Sydney, Australia.
Western Pac Surveill Response J. 2017 Jun 21;8(2):1-4. doi: 10.5365/WPSAR.2016.7.2.007. eCollection 2017 Apr-Jun.
In September 2015, the South Western Sydney (SWS) Public Health Unit was notified of a cluster of Typhimurium (STm) cases with a common multiple-locus variable-number tandem repeats analysis (MLVA) pattern. An investigation was conducted to identify a source and contain the outbreak.
The cluster was initially identified through routine geographic information system cluster scanning applied to the New South Wales Notifiable Conditions Management System. Additional cases were identified through a complaint to local council about a bakery. The bakery was inspected and 48 environmental and food swabs were collected for analysis.
A total of 26 suspected cases were identified, of which 14 were interviewed. STm MLVA type 3-16-9-11-523 was identified in 19 of 26 case stool specimens. Most cases (12/14) consumed bread rolls containing pork or chicken with chicken liver pâté and raw egg mayonnaise filling. Five cases identified a common bakery exposure. Environmental and food samples from the bakery isolated STm with an identical MLVA pattern.
An STm cluster in SWS was investigated and found to be linked to Vietnamese bread rolls containing pork or chicken with chicken liver pâté and raw egg mayonnaise filling. Confirmation of a distinct MLVA pattern among STm isolates from clinical, food and environmental samples provided evidence to establish an epidemiological link between the cases and the implicated premises and informed public health action to contain the outbreak.
2015年9月，西南悉尼（SWS）公共卫生部门接到通报，有一群鼠伤寒沙门氏菌（STm）病例具有相同的多位点可变数目串联重复序列分析（MLVA）模式。开展了一项调查以确定源头并控制疫情。
该集群最初是通过应用于新南威尔士州法定传染病管理系统的常规地理信息系统集群扫描识别出来的。通过向地方议会投诉一家面包店又发现了其他病例。对该面包店进行了检查，并采集了48份环境和食品拭子进行分析。
共识别出26例疑似病例，其中14例接受了访谈。在26例病例的粪便标本中，有19例检测出STm MLVA 3-16-9-11-523型。大多数病例（12/14）食用了含有猪肉或鸡肉、鸡肝酱和生蛋黄酱馅料的面包卷。5例病例确定有共同的面包店接触史。从该面包店采集的环境和食品样本中分离出的STm具有相同的MLVA模式。
对SWS的一个STm集群进行了调查，发现其与含有猪肉或鸡肉、鸡肝酱和生蛋黄酱馅料的越南面包卷有关。临床、食品和环境样本中分离出的STm菌株具有独特的MLVA模式，这为确定病例与涉事场所之间的流行病学联系提供了证据，并为控制疫情的公共卫生行动提供了依据。
