Razin S, Yogev D
Pediatr Infect Dis. 1986 Nov-Dec;5(6 Suppl):S300-4. doi: 10.1097/00006454-198611010-00022.
Fourteen serotypes (serovars) are currently recognized in the species Ureaplasma urealyticum. DNA-DNA hybridization tests, cleavage of genomic DNA by restriction endonucleases, and polyacrylamide gel electrophoresis of cell proteins indicate that the U. urealyticum serotypes fall into two genotypically distinct, but related, clusters. Southern hybridization tests of mycoplasmal ribosomal RNA gene probes with DNAs of the various serotypes digested by restriction endonucleases showed that the U. urealyticum chromosome carries two sets (operons) of ribosomal RNA genes. However, the hybridization patterns produced by the serotypes showed differences which were most pronounced among serotypes belonging to the two different clusters.
目前在解脲脲原体物种中已识别出14种血清型（血清变种）。DNA - DNA杂交试验、用限制性内切酶切割基因组DNA以及细胞蛋白的聚丙烯酰胺凝胶电泳表明，解脲脲原体血清型可分为两个基因型不同但相关的簇。用限制性内切酶消化的各种血清型DNA与支原体核糖体RNA基因探针进行的Southern杂交试验表明，解脲脲原体染色体携带两组（操纵子）核糖体RNA基因。然而，血清型产生的杂交模式显示出差异，在属于两个不同簇的血清型之间差异最为明显。
