因为绿脓在抗生素选择压力下,会导致一些基因的表达改变,而其中最重要的就是藻酸盐基因表达升高,藻酸盐就是粘液的主要组成成分。粘液也是绿脓的保护性生长模式,可以降低抗生素的渗入,减小抗生素对绿脓的影响。
一篇文章可以作为参考:
Am J Clin Pathol. 2007 Jul;128(1):32-4. Mucoid Pseudomonas in cystic fibrosis.
Pseudomonas aeruginosa is a frequent and virulent pulmonary pathogen in patients with cystic fibrosis. If colonization is not prevented, P aeruginosa becomes permanently established and nearly always mutates into a mucoid strain. The alginate-containing matrix of the mucoid strain is thought to allow the formation of protected microcolonies and provide increased resistance to opsonization, phagocytosis, and destruction by antibiotics. As a result, conversion to the mucoid phenotype is associated with a significant increase in morbidity and mortality. In the microbiology laboratory, mucoid P aeruginosa has a distinct Gram stain and culture appearance that can expedite its identification and facilitate appropriate patient management. Important aspects of the mucoid phenotype are reviewed.