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Volume 32, Number 5—May 2026

Synopsis

Three Fatal Gestational Psittacosis Cases Caused by Chlamydia psittaci Strains Belonging to Closely Related Lineages, Japan

Atsuko Nishino, Yukiko Nakura, Yukiko Sassa-O’Brien, Momoko Soeda, Hirokazu Sugii, Kanako Shimizu, Shiro Miura, Yumiko Sato, Michinobu Yoshimura1, Michiko Kodama, and Itaru YanagiharaComments to Author 
Author affiliation: Research Institute, Osaka Women’s and Children’s Hospital, Osaka, Japan (A. Nishino, Y. Nakura, M. Yoshimura, I. Yanagihara); The University of Osaka, Osaka (A. Nishino, M. Kodama, I. Yanagihara); Tokyo University of Agriculture and Technology, Tokyo, Japan (Y. Sassa-O’Brien); NHO Nagasaki Medical Center, Nagasaki, Japan (M. Soeda, S. Miura); NHO Iwakuni Clinical Center, Yamaguchi, Japan (H. Sugii, Y. Sato); Tannan Health Welfare Center, Fukui, Japan (K. Shimizu); Maizuru Kyosai Hospital, Kyoto, Japan (K. Shimizu)

Main Article

Figure 5

Histologic findings from 3 fatal gestational psittacosis cases caused by C. psittaci strains belonging to closely related multilocus sequence typing lineages, Japan, 2017–2024. A–C) Hematoxylin and eosin staining (scale bar = 50 µm; original magnification ×20) and immunofluorescence microscopy of the placenta, lung, and spleen are shown for case FO-01 (A), case YO-02 (B), and case NO-03 (C). Specific fluorescence observed via immunofluorescence using C. psittaci BC6 rabbit antibody staining. Nuclei were stained with DAPI. Merge column indicates BC6 antibody staining and DAPI. Original magnification ×20. D) High-magnification view (original magnification ×60) of the villi. DAPI, 4′,6-diamidino-2-phenylindole; H&E, hematoxylin and eosin.

Figure 5. Histologic findings from 3 fatal gestational psittacosis cases caused by C. psittaci strains belonging to closely related multilocus sequence typing lineages, Japan, 2017–2024. A–C) Hematoxylin and eosin staining (scale bar = 50 µm; original magnification ×20) and immunofluorescence microscopy of the placenta, lung, and spleen are shown for case FO-01 (A), case YO-02 (B), and case NO-03 (C). Specific fluorescence observed via immunofluorescence using C. psittaci BC6 rabbit antibody staining. Nuclei were stained with DAPI. Merge column indicates BC6 antibody staining and DAPI. Original magnification ×20. D) High-magnification view (original magnification ×60) of the villi. DAPI, 4′,6-diamidino-2-phenylindole; H&E, hematoxylin and eosin.

Main Article

1Current affiliation: Fukuoka University, Fukuoka, Japan.

Page created: April 01, 2026
Page updated: May 08, 2026
Page reviewed: May 08, 2026
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