Kapil Arti
Department of Microbiology, All India Institute of Medical Sciences, New Delhi, India. akapil@
Indian J Med Res. 2005 Feb;121(2):83-91.
"Survival of the fittest " holds good for men and animals as also for bacteria. A majority of bacteria in nature are nonpathogenic, a large number of them, live as commensals on our body leading a symbiotic existence. A limited population of bacteria which has became pathogenic was also sensitive to antibiotics to begin with. It is the man made antibiotic pressure, which has led to the emergence and spread of resistant genes amongst bacteria. Despite the availability of a large arsenal of antibiotics, the ability of bacteria to become resistant to antibacterial agents is amazing. This is more evident in the hospital settings where the antibiotic usage is maximum. The use of antibiotics is widespread in clinical medicine, agriculture, aquaculture, veterinary practice, poultry and even in household products. The major reason for this is the inappropriate use of antibiotics due to a lack of uniform policy and disregard to hospital infection control practices. The antibiotic cover provided by newer antibiotics has been an important factor responsible for the emergence of multi-drug resistant bacteria. Bacterial infections increase the morbidity and mortality, increase the cost of treatment, and prolong hospital stay adding to the economical burden on the nation. The problem is further compounded by the lack of education and " over the counter " availability of antibiotics in developing countries. Antibiotic resistance is now all pervasive with the developed world as much vulnerable to the problem. Despite advancement in medical technology for diagnosis and patient care, a person can still die of an infection caused by a multi-drug resistant bacteria. It is time to think, plan and formulate a strong antibiotic policy to address the burgeoning hospital infection.
“适者生存”对人类、动物以及细菌同样适用。自然界中的大多数细菌是非致病性的,其中大量细菌作为共生菌生活在我们体内,与我们共生。一开始,有限数量的致病细菌对抗生素也是敏感的。正是人为的抗生素压力导致了细菌中耐药基因的出现和传播。尽管有大量的抗生素储备,但细菌对抗菌剂产生耐药性的能力却令人惊讶。这在抗生素使用量最大的医院环境中更为明显。抗生素在临床医学、农业、水产养殖、兽医实践、家禽养殖甚至家用产品中都有广泛使用。主要原因是由于缺乏统一政策以及忽视医院感染控制措施而导致抗生素使用不当。新型抗生素提供的抗菌覆盖是导致多重耐药菌出现的一个重要因素。细菌感染会增加发病率和死亡率,增加治疗成本,并延长住院时间,加重国家的经济负担。在发展中国家,由于缺乏教育以及抗生素“非处方”可得,这个问题更加复杂。现在抗生素耐药性无处不在,发达国家也同样容易受到这个问题的影响。尽管在诊断和患者护理的医疗技术方面有所进步,但一个人仍可能死于由多重耐药菌引起的感染。现在是时候思考、规划并制定一项强有力的抗生素政策来应对不断激增的医院感染问题了。