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.肺结核（Tuberculosis）是人类历史上传播最为广泛的传染病之一，至今仍是全球重大公共卫生难题。该病的主要病原体为结核分枝杆菌（Mycobacterium tuberculosis）。本文对该结核致病菌的生物学特性、细胞壁结构及其致病因子展开分析，同时重点探讨了该细菌与免疫系统的相互作用、人体体内的疾病发生机制、诊断方法、治疗原则以及预防措施。 全球每年报告的肺结核新增病例约达800万例。过去十余年间，肺结核的流行病学态势持续恶化。由于人群预防性荧光胸片检查的减少，目前超50%的肺结核病例需通过综合医疗机构的患者转诊流程完成确诊。 分枝杆菌（Mycobacteria）的抗性强于多数其他微生物，可在多种环境条件下长期存活：在街道灰尘中可存活至多10天，在流水中可存活至多150天，甚至可在冰冻或干燥状态下存续。分枝杆菌的细胞壁富含脂质与蜡样物质，这使其对消毒剂及多数药物具有抗性。此类细菌可在人体内长期处于潜伏（“休眠”）状态，待免疫系统功能减弱时再度激活。