儿童在社区获得的抗甲素黄金葡萄球菌感染:主要特征和与殖民化的比较
Blanca Bravo-Queipo-de-Llano1,2,3, Beatriz Jiménez4, Marc García-Lorenzo5
1From the Pediatrics and Infectious and Tropical Diseases Department, La Paz University Hospital, La Paz Research Institute (IdiPAZ), Madrid, Spain.
The Pediatric infectious disease journal
|June 5, 2025
概括
儿童在社区获得的甲素耐药黄金葡萄球菌 (CA-MRSA) 感染与移民身份和Panton-Valentine leucocidin (PVL) 毒素有关. 高抗生素耐药性需要为儿童MRSA感染量身定制的治疗策略.
科学领域:
- 儿童传染病 儿童传染病
- 微生物学 微生物学
- 公共卫生 公共卫生
背景情况:
- 甲素耐药黄金葡萄球菌 (MRSA) 构成重大威胁,导致皮肤和软组织感染 (SSTI) 和儿童严重并发症.
- 潘顿-瓦伦丁白素 (PVL) 是一个关键的毒性因子,增加了MRSA的致病性.
- 儿童群体中社区获得的MRSA (CA-MRSA) 感染需要对其流行病学,抗生素耐药性和PVL产生进行调查.
研究的目的:
- 研究儿童CA-MRSA感染的流行病学,抗生素耐药性和PVL产生.
- 在儿科患者中识别与CA-MRSA感染相关的风险因素.
- 为了比较CA-MRSA引起感染和殖民的特征.
主要方法:
- 在西班牙 (2018-2020年) 一项全国性的多中心回顾性研究分析了252名18岁以下的CA-MRSA感染的儿童.
- 收集的数据包括流行病学,临床和微生物学信息,重点是抗生素易感性和PVL产生.
- 使用统计分析,包括多变量逻辑回归来确定与感染相关的因素.
主要成果:
- 皮肤和软组织感染 (SSTI) 是最常见的表现 (89.3%),其中23.6%需要住院治疗.
- 移民身份 (52.5%) 和之前的SSTI (39.1%) 与CA-MRSA感染有显著的相关性 (P < 0.05).
- 在76.9%的MRSA菌株中检测到PVL基因,在感染时比殖民时更频繁 (P < 0.001). 观察到对西普罗素 (32.2%) 和克林达米辛 (18.3%) 的高耐药性.
结论:
- 移民身份和PVL毒素的产生是儿童CA-MRSA感染的重要风险因素.
- 高抗生素耐药性率强调了基于局部耐药性模式的治疗策略的必要性.
- 在CA-MRSA感染中,PVL的患病率高于儿童的殖民感染.
相关概念视频
Defense Against Bacterial Pathogens
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Development of the Oral Microbiota
The establishment of the oral microbiome begins before birth, challenging the long-held belief that the fetal oral cavity is sterile. The presence of oral microbes such as Streptococcus and Fusobacterium in amniotic fluid suggests that microbial exposure may occur in utero, potentially through translocation from the maternal oral or gastrointestinal tract. This early colonization primes the neonatal immune system and sets the stage for subsequent microbial succession. Maternal health,...
Colonisation of Pathogens
Pathogen colonization of host tissues is a critical step in the development of infectious diseases. Various pathogenic microorganisms, including bacteria, fungi, viruses, and protozoa, have evolved complex strategies to attach to, invade, and persist within host environments. These mechanisms enable pathogens to establish infections, evade immune responses, and resist antimicrobial treatments.Attachment to Host CellsIn bacteria, colonization typically begins with adherence to host epithelial...
Staphylococcal Skin Infections
Staphylococcus aureus is a Gram-positive coccus that resides harmlessly on the skin and mucous membranes of healthy individuals. When the skin barrier is breached, it can shift from a commensal to an opportunistic pathogen. This transition is facilitated by surface adhesins, such as clumping factor B and S. aureus surface protein G (SasG), which bind to structural proteins, including loricrin and cytokeratin, in the damaged epidermis. Protein A, another key factor, binds the Fc region of...
Mechanism of Antibiotic Resistance in MRSA
Antibiotic resistance in bacteria arises when microorganisms evolve the ability to withstand drugs designed to kill them or inhibit their growth, rendering once-effective treatments useless. This phenomenon, driven by genetic change and selection under antibiotic exposure, poses a profound threat to modern medicine. Mechanisms include drug-inactivating enzymes (e.g., β-lactamases), efflux pumps that eject antibiotics, mutations altering antibiotic targets, decreased drug uptake, and acquisition...
Clinical Significance of Antibiotic Resistance
Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within the One...


