Mada Pradeep Kumar, Alam Mohammed U.
Louisiana State University Shreveport
Louisiana State University HSC
formerly is a gram-positive and spore-forming bacterium. This obligate anaerobic bacillus is recognized for its ability to produce toxins and is the leading cause of antibiotic-associated diarrhea worldwide. infections can range from an asymptomatic carrier to diarrhea, progressing to severe conditions such as pseudomembranous colitis and toxic megacolon with septic shock, often resulting in a high mortality rate. Although traditionally considered a primary healthcare-associated infection, an increasing incidence of community-acquired infections also exists. The emergence of a newer hypervirulent strain, the North American pulsed-field gel electrophoresis type 1 (NAP1), has been attributed to increased incidence and severity of infections over the last 2 decades. can colonize the intestines of healthy people without causing infection and survive on surfaces in the hospital and soil for extended periods. Contaminated surfaces and medical equipment in healthcare facilities can become reservoirs for spores, potentially transmitting to patients if proper cleaning protocols are not routinely implemented. The most significant risk factor for infection is broad-spectrum antibiotics. Patients can be colonized with without symptoms, but antibiotic use disturbs the balance of gut flora, enablingovergrowth and infection. Additional risk factors for infection include proton pump inhibitors, advanced age, immunosuppression, underlying health conditions, prior infection, recent hospitalization, prolonged hospital stays, inadequate infection control, and suboptimal antibiotic stewardship in healthcare settings, facilitating transmission among patients. While infection is primarily associated with healthcare settings, a growing recognition of community-acquired cases exists, particularly among younger and healthier individuals with minimal recent healthcare exposure. The emergence of genome sequencing has revealed that reservoirs for exist within healthcare systems, environment, food, soil, and animals, comprising a "One Health" continuum. Managing infections remains challenging due to its increasing global burden, emergence in community settings, complexities in handling severe and recurrent cases, and rising morbidity and mortality rates. Understanding the epidemiology of infection is crucial for implementing effective prevention and control measures in healthcare settings and the community. These strategies include prudent antibiotic use, hand hygiene practices, environmental cleaning, and early detection and management of cases.
艰难梭菌以前是一种革兰氏阳性产芽孢细菌。这种专性厌氧芽孢杆菌以其产生毒素的能力而闻名，是全球抗生素相关性腹泻的主要原因。感染范围可从无症状携带者到腹泻，进而发展为严重病症，如假膜性结肠炎和伴有感染性休克的中毒性巨结肠，常导致高死亡率。尽管传统上认为艰难梭菌感染主要与医疗保健相关，但社区获得性感染的发病率也在增加。一种更新的高毒力菌株，即北美脉冲场凝胶电泳1型（NAP1）的出现，被认为是过去20年中艰难梭菌感染发病率和严重程度增加的原因。艰难梭菌可在健康人的肠道中定植而不引起感染，并能在医院表面和土壤中长期存活。医疗保健设施中受污染的表面和医疗设备可能成为艰难梭菌孢子的储存库，如果不常规执行适当的清洁规程，可能会传播给患者。艰难梭菌感染最显著的危险因素是广谱抗生素。患者可能在无症状的情况下被艰难梭菌定植，但使用抗生素会扰乱肠道菌群平衡，导致其过度生长并引发感染。感染的其他危险因素包括质子泵抑制剂、高龄、免疫抑制、基础健康状况、既往感染、近期住院、住院时间延长、感染控制不足以及医疗保健环境中抗生素管理不当，这些因素促进了患者之间的传播。虽然艰难梭菌感染主要与医疗保健环境相关，但人们越来越认识到社区获得性病例的存在，特别是在近期医疗接触极少的年轻健康个体中。基因组测序的出现表明，艰难梭菌的储存库存在于医疗系统、环境、食物、土壤和动物中，构成了一个“同一健康”的连续体。由于其全球负担不断增加、在社区环境中出现、处理严重和复发病例的复杂性以及发病率和死亡率不断上升，管理艰难梭菌感染仍然具有挑战性。了解艰难梭菌感染的流行病学对于在医疗保健环境和社区中实施有效的预防和控制措施至关重要。这些策略包括谨慎使用抗生素、手部卫生习惯、环境清洁以及病例的早期检测和管理。
