Preservation of trachoma agent in HeLa cells.
D002245:Carbon Dioxide; D002689:Chlamydia; D046508:Culture Techniques; D004121:Dimethyl Sulfoxide; D005615:Freezing; D006367:HeLa Cells; D006801:Humans; D009584:Nitrogen; D011309:Preservation, Biological
D002245:Carbon Dioxide; D009584:Nitrogen; D004121:Dimethyl Sulfoxide