铁对原核生物及真核生物是一种基本生长因子。许多微生物形成了一种高亲和力铁吸收系统以生存于铁源有限的环境。最适于研究的是所谓低分子量的铁螯合的复合物即载铁体。这些复合物在铁螯合后经微生物的特异转运系统分泌出来,如脱铁铵(DFO),脱铁铬(DFC),脱铁产气菌素(DFAB)和脱铁肠细菌素(DFEB)。在缺铁条件下,如含转铁蛋白培养基中,加入铁铵可促进O:3血清型耶氏肠炎菌的繁殖。另一方面,由于DFO能限制铁而阻断有丝分裂原的激活和T Iron is a basic growth factor for prokaryotes and eukaryotes. Many microorganisms form a high-affinity iron absorption system to survive in a limited source of iron. The most suitable for study is the so-called low molecular weight iron chelate complexes ie iron carriers. These complexes are sequestered after iron chelation via microbial specific transport systems such as DFO, DFC, DFAB and DFEB, . In iron deficiency conditions, such as transferrin-containing medium, adding ferric ammonium can promote the O: 3 serotypes of enterobacter cloacae breeding. On the other hand, mitochondrial activation and T are blocked because DFO can limit iron