To preliminarily evaluate the applicability of bacterial DNA as a marker for the forensic identification of
vaginal fluid, we developed and performed PCR-based detection of 16S ribosomal RNA genes of
Lactobacillus spp. dominating the vagina and of bacterial vaginosis-related bacteria from DNA extracted
from body fluids and stains. As a result, 16S ribosomal RNA genes of Lactobacillus crispatus, Lactobacillus
jensenii and Atopobium vaginae were specifically detected in vaginal fluid and female urine samples.
Bacterial genes detected in female urine might have originated from contaminated vaginal fluid. In addi-
tion, those of Lactobacillus iners, Lactobacillus gasseri and Gardnerella vaginalis were also detected in non-
vaginal body fluids such as semen. Because bacterial genes were successfully amplified in DNA samples
extracted by using the general procedure for animal tissues without any optional treatments, DNA sam-
ples prepared for the identification of vaginal fluid can also be used for personal identification. In conclu-
sion, 16S ribosomal RNA genes of L. crispatus, L. jensenii and A. vaginae could be effective markers for
forensic identification of vaginal fluid.
To preliminarily evaluate the applicability of bacterial DNA as a marker for the forensic identification of
vaginal fluid, we developed and performed PCR-based detection of 16S ribosomal RNA genes of
Lactobacillus spp. dominating the vagina and of bacterial vaginosis-related bacteria from DNA extracted
from body fluids and stains. As a result, 16S ribosomal RNA genes of Lactobacillus crispatus, Lactobacillus
jensenii and Atopobium vaginae were specifically detected in vaginal fluid and female urine samples.
Bacterial genes detected in female urine might have originated from contaminated vaginal fluid. In addi-
tion, those of Lactobacillus iners, Lactobacillus gasseri and Gardnerella vaginalis were also detected in non-
vaginal body fluids such as semen. Because bacterial genes were successfully amplified in DNA samples
extracted by using the general procedure for animal tissues without any optional treatments, DNA sam-
ples prepared for the identification of vaginal fluid can also be used for personal identification. In conclu-
sion, 16S ribosomal RNA genes of L. crispatus, L. jensenii and A. vaginae could be effective markers for
forensic identification of vaginal fluid.
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