Chlamydia pneumoniae sp. nov. for Chlamydia sp. Strain TWAR Grayston, J. Thomas and Kuo, Cho-Chou and Campbell, Lee Ann and Wang, San-Pin,, 39, 88-90 (1989), doi = https://doi.org/10.1099/00207713-39-1-88, publicationName = Microbiology Society, issn = 1466-5026, abstract= Abstract A third species, Chlamydia pneumoniae, is proposed for the genus Chlamydia. This bacterium is a human respiratory pathogen, which has been referred to as the TWAR strain of Chlamydia. Species identification is based on ultrastructural differences in the elementary bodies, deoxyribonucleic acid analysis, and serology., language=, type=