PATHOGENIC FACTORS OF THE TUBERCULOSIS AGENT – MYCOBACTERIUM TUBERCULOSIS

Tuberculosis is one of the most widespread infectious diseases in human history and remains a major global public health problem. The main etiological agent of this disease is Mycobacterium tuberculosis. This article analyzes the biological characteristics of the tuberculosis pathogen, the structure of its cell wall, and its pathogenicity factors. Particular attention is also given to the interaction of the bacterium with the immune system, the mechanisms of disease development in the human body, diagnostic methods, treatment principles, and preventive measures. Approximately 8 million new cases of tuberculosis are reported worldwide each year. Over the past decade, a deterioration in the epidemiological situation of tuberculosis has been observed. Due to the reduction in preventive fluorographic examinations among the population, more than 50% of tuberculosis cases are now detected in general medical institutions based on patient referrals. Mycobacteria are more resistant than many other microorganisms. They can survive for a long time under various environmental conditions: up to 10 days in street dust, up to 150 days in running water, and even in a frozen or dried state. The cell wall of mycobacteria is rich in lipids and wax-like substances, which makes them resistant to disinfectants and many drugs. These bacteria can remain in a latent (“dormant”) state in the human body for years and become active when the immune system weakens.结核病是人类历史上传播范围最广的传染病之一，至今仍是全球重大公共卫生问题。该病的主要病原体为结核分枝杆菌（Mycobacterium tuberculosis）。本文分析了该结核致病菌的生物学特性、细胞壁结构及其致病因子，同时特别关注了该细菌与免疫系统的相互作用、人体发病机制、诊断方法、治疗原则以及预防措施。 全球每年报告约800万例结核病新增病例。过去十年间，结核病的流行病学形势持续恶化。由于人群预防性荧光影像学检查的开展量减少，如今超过50%的结核病病例是通过患者转诊在综合医疗机构中被发现的。 分枝杆菌（Mycobacteria）的抗逆性优于多数其他微生物。它们可在多种环境条件下长期存活：在街道尘埃中可存活长达10天，在流水中可达150天，甚至在冷冻或干燥状态下亦可存活。分枝杆菌的细胞壁富含脂质与蜡质物质，这使其对消毒剂与多数药物具有抗性。这类细菌可在人体内长期处于潜伏（“休眠”）状态，当免疫系统功能减弱时则会重新激活致病。