Bouncy castle launches horrifying MRSA outbreak, striking 48 kids in Ireland

充气城堡引发恐怖耐药金葡菌（MRSA）疫情，导致爱尔兰48名儿童感染

For a child bursting with energy, few things are more fun than hurtling through a bouncy castle, launching into the air, and ping-ponging between every surface. But that childhood buoyancy will quickly deflate when it turns out those surfaces are smeared with a hypervirulent, multidrug-resistant pathogen. That was the horrifying reality for a community in Ireland in fall 2025. 对于精力充沛的孩子来说，在充气城堡里飞奔、腾空而起并在各个表面之间弹跳，是再有趣不过的事情了。然而，当发现这些表面沾满了高毒性、多重耐药的病原体时，这种童年的快乐瞬间就会烟消云散。这就是2025年秋天爱尔兰一个社区所经历的恐怖现实。

Neighbors had gathered for an afternoon of merriment, complete with a barbecue, a sweets station, and three bouncy castles. Officials estimate that about 120 people joined the festivities, and around half of them were children and teens. Within a day, some children began developing signs of an infection. In all, 48 children in the community developed aggressive skin and soft-tissue infections. Of the 48 cases, 33 were treated by their regular doctor, and 15 sought emergency care. Four children ended up being hospitalized. Luckily, all of the children recovered. The results of the outbreak investigation were reported this week in the journal Eurosurveillance. 邻居们聚在一起度过了一个欢乐的下午，现场有烧烤、糖果站和三个充气城堡。据官方估计，约有120人参加了这次庆祝活动，其中约一半是儿童和青少年。一天之内，一些孩子开始出现感染迹象。该社区共有48名儿童出现了严重的皮肤和软组织感染。在48个病例中，33人由家庭医生治疗，15人寻求了急诊护理。最终有4名儿童住院治疗。幸运的是，所有孩子都康复了。此次疫情调查结果于本周发表在《欧洲监测》（Eurosurveillance）杂志上。

Party crashers

不速之客

Local health officials became alerted to the outbreak nine days after the event, when a 12-year-old boy was hospitalized for a skin infection. His doctors had determined he was infected with MRSA—aka methicillin-resistant Staphylococcus aureus. By then, there were around 25 other, less severe cases identified. Genomic sequencing revealed the outbreak was caused by a rare strain of MRSA capable of producing a cytotoxin called Panton–Valentine leukocidin (PVL). This toxin can destroy immune cells and spark inflammation. It’s often linked to necrotic lesions. 在活动发生九天后，一名12岁男孩因皮肤感染住院，当地卫生官员才获悉此次疫情。医生确定他感染了MRSA，即耐甲氧西林金黄色葡萄球菌。到那时，已经发现了约25例病情较轻的病例。基因组测序显示，此次疫情是由一种罕见的MRSA菌株引起的，该菌株能够产生一种称为杀白细胞素（PVL）的细胞毒素。这种毒素可以破坏免疫细胞并引发炎症，通常与坏死性病变有关。

The bacterium’s hostilities were clear in the outbreak; most of the infected children developed symptoms within four days of the event, much faster than the usual incubation period of 4–10 days. Some saw their infections develop within hours. The infected children reported a range of skin and soft tissue symptoms, including spots, pustules, blisters, and abscesses. Most of the skin infections erupted on the children’s legs, particularly their thighs, fitting with an exposure in the bouncy castles. Twelve cases also reported systemic symptoms, such as fever, nausea, or vomiting. 这种细菌在疫情中的攻击性显而易见；大多数受感染的儿童在活动后四天内就出现了症状，这比通常4至10天的潜伏期要快得多。有些孩子在几小时内就出现了感染。受感染的儿童报告了一系列皮肤和软组织症状，包括斑点、脓疱、水疱和脓肿。大多数皮肤感染发生在孩子们的腿部，尤其是大腿，这与在充气城堡中的接触情况相吻合。12例病例还报告了全身症状，如发烧、恶心或呕吐。

The MRSA strain, called t016-ST22-MRSA-IV, has a unique pattern of antibiotic resistance; it could resist at least four drugs, including flucloxacillin, ciprofloxacin, gentamicin, and trimethoprim. Fortunately, there were others to which it was still susceptible, including clindamycin, tetracycline, fusidic acid, co-trimoxazole, and linezolid. MRSA most often plagues healthcare settings, but it’s also known to spread in communities, such as in this case. So-called community-associated MRSA is often linked to crowded settings where people have close contact, such as sports activities, daycares, and prisons. 这种被称为t016-ST22-MRSA-IV的MRSA菌株具有独特的抗生素耐药模式；它至少能抵抗四种药物，包括氟氯西林、环丙沙星、庆大霉素和甲氧苄啶。幸运的是，它对其他药物仍然敏感，包括克林霉素、四环素、夫西地酸、复方新诺明和利奈唑胺。MRSA最常困扰医疗环境，但也已知会在社区中传播，正如本案一样。所谓的社区相关性MRSA通常与人们有密切接触的拥挤环境有关，例如体育活动、托儿所和监狱。

The outbreak reported here was not only the largest MRSA outbreak ever recorded in Ireland, it was also the first known outbreak anywhere to be linked to bouncy castle use. The connection became more understandable during the official investigation. 此次报告的疫情不仅是爱尔兰有记录以来规模最大的MRSA疫情，也是全球首例已知与使用充气城堡有关的疫情。在官方调查过程中，这种联系变得更加清晰。

Ideal conditions

理想的条件

After interviewing the families of the infected children, officials learned that most of the children played in the bouncy castles for multiple hours—some as long as five, six, or more hours. Inside, it was crowded, and the children’s play was described as “rough-and-tumble” (as parents would likely expect). Such play could have caused superficial abrasions and scrapes, offering the bacterium an opening. Parents also recalled that the weather that day was humid, warm, and rainy. Many of the children were noticeably wet. In all, these conditions could have been ideal for an MRSA strain to flourish and spread. 在采访了受感染儿童的家庭后，官员们了解到，大多数孩子在充气城堡里玩了几个小时——有的长达五、六个小时甚至更久。城堡内部拥挤，孩子们的玩耍方式被描述为“打闹嬉戏”（正如家长们所预料的那样）。这种玩耍方式可能导致了表皮擦伤和刮伤，为细菌提供了入侵的切口。家长们还回忆说，那天天气潮湿、温暖且有雨。许多孩子身上明显是湿的。总而言之，这些条件对于MRSA菌株的繁衍和传播来说可能是理想的。

Of the 48 children infected, 47 played in the bouncy castles. The one child who had not been in the inflatable structure had very close contact with an exposed child shortly afterward. In all, officials concluded that no other exposure appeared as a plausible explanation for the outbreak; everything pointed to the bouncy castles. Still, they decided against trying to swab them for the MRSA strain. For one thing, a positive surface swab still wouldn’t confirm the castle was the source. Moreover, by the time officials had suspected the castles, they questioned whether MRSA would still be alive on surfaces, let alone how much of the surface of the three castles they would have to swab to find any. 在48名受感染的儿童中，有47名在充气城堡里玩耍过。那名没有进入充气结构的孩子在事后与一名接触过感染源的孩子有过非常密切的接触。总之，官员们得出结论，没有其他接触途径能作为此次疫情的合理解释；一切都指向了充气城堡。尽管如此，他们还是决定不对城堡进行拭子采样以检测MRSA菌株。首先，即使表面拭子检测呈阳性，也无法证实城堡就是源头。此外，当官员们怀疑城堡时，他们质疑MRSA是否还能在表面存活，更不用说他们需要对三个城堡的多少表面进行采样才能找到它。

Instead, the health officials contacted the bouncy castle owners and advised them to do a thorough decontamination. Based on all the data, they hypothesize that one or more of the children at the event went into the castles with an active infection, introducing a large load of bacterial contamination. This resulted in many children getting a high exposure to the hypervirulent pathogen, and they swiftly developed aggressive infections amid very favorable environmental conditions. 相反，卫生官员联系了充气城堡的所有者，建议他们进行彻底的消毒。根据所有数据，他们推测活动中的一名或多名儿童在进入城堡时已经处于活动性感染状态，从而引入了大量的细菌污染。这导致许多儿童高度暴露于这种高毒性病原体中，并在非常有利的环境条件下迅速发展为严重的感染。

Luckily, there was only one case of a secondary infection—the one child who was infected who did not go inside the castles. Officials speculated that prompt outbreak responses kept the MRSA strain from moving onward in families and the community. In addition to treating infected children with antibiotics, officials advised the children and their family members to undergo a decolonization protocol. This involved using a chlorhexidine-based or equivalent antimicrobial body wash once a day for five days, along with a mupirocin nasal antimicrobial ointment, also for five days. 幸运的是，只有一例继发感染——即那名没有进入城堡却被感染的孩子。官员们推测，迅速的疫情应对措施阻止了MRSA菌株在家庭和社区中的进一步传播。除了用抗生素治疗受感染的儿童外，官员们还建议儿童及其家庭成员进行去定植方案。这包括每天使用一次基于氯己定或同等抗菌成分的沐浴露，持续五天，同时使用莫匹罗星鼻腔抗菌软膏，也持续五天。

The outbreak was declared over 40 days after the community event, after two standard incubation periods had passed without a new case. Overall, the officials described the outbreak as “unusual and complex” with a “novel mechanism” for spreading an alarming strain of MRSA. They urge owners of bouncy castles to be aware of this newly discovered risk and ensure adequate decontamination. 在社区活动结束40天后，在经过两个标准潜伏期且没有出现新病例的情况下，此次疫情被宣布结束。总的来说，官员们将此次疫情描述为“不同寻常且复杂”的，并指出其传播这种令人担忧的MRSA菌株的“机制新颖”。他们敦促充气城堡的所有者意识到这一新发现的风险，并确保进行充分的消毒。