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Volume 13, Number 12—December 2007

Dispatch

Parachlamydia spp. and Related Chlamydia-like Organisms and Bovine Abortion

Nicole Borel*, Silke Ruhl*, Nicola Casson†, Carmen Kaiser*, Andreas Pospischil*, and Gilbert Greub†Comments to Author 
Author affiliations: *University of Zurich, Zurich, Switzerland; †University of Lausanne, Lausanne, Switzerland;

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Table

Results of histologic, 16S rRNA sequence, and immunohistochemical analyses for 43 placentas positive for Chlamydia-like DNA by a 16S rRNA PCR*

Specimen no. Histology
16S rRNA sequence†
Immunohistochemistry
Placentitis Vasculitis Species % Similarity Parachlamydia spp. Waddlia
1 N Yes Parachlamydia 99 +
2 N No Parachlamydia 97 +
3 P/N No Parachlamydia 98 +
4 P/N No Parachlamydia 97
5 P/N No Parachlamydia 97
6 A No Parachlamydia 96 +
7 A No Parachlamydia 96 +
8 A No Parachlamydia 97 +
9 P/N Yes Chlamydia-like 92
10 P/N Yes Chlamydia-like 92
11 P/N Yes Chlamydia-like 93
12 P/N Yes Chlamydia-like 91 +
13 P/N No Chlamydia-like 82 +
14 P/N No Chlamydia-like 91 +
15 P/N No Chlamydia-like 92 +
16 P/N No Chlamydia-like 92 +
17 P/N No Chlamydia-like 92 +
18 P/N No Chlamydia-like 92 +
19 P/N No Chlamydia-like 92 +
20 P/N No Chlamydia-like 92 +
21 P/N No Chlamydia-like 93 +
22 P/N No Chlamydia-like 94 +
23 P/N No Chlamydia-like 95 +
24 P/N No Chlamydia-like 100 +
25 P/N No Chlamydia-like 93
26 P/N No Chlamydia-like 93
27 P/N No Chlamydia-like 95
28 P/N No Chlamydia-like 96
29 N No Chlamydia-like 85 +
30 N No Chlamydia-like 88 +
31 N No Chlamydia-like 88 +
32 N No Chlamydia-like 91 +
33 N No Chlamydia-like 91 +
34 N No Chlamydia-like 95 +
35 P No Chlamydia-like 91 +
36 P No Chlamydia-like 94 +
37 A No Chlamydia-like 91 +
38 A No Chlamydia-like 92 +
39 A No Chlamydia-like 92 +
40 A No Chlamydia-like 91
41 A No Chlamydia-like 92
42 A No Chlamydia-like 93
43 A No Chlamydia-like 95

*When partial 16S rRNA sequence showed a similarity >95% with a recognized species (i.e., Parachlamydia acanthamoebae), the corresponding genus was reported (i.e., Parachlamydia spp.). Conversely, when the sequence showed a best BLAST (www.ncbi.nlm.nih.gov) hit with uncultured or uncharacterized Chlamydia-related organisms, the sequence was designated as being similar to a Chlamydia-like organism. N, necrotizing; +, positive; –, negative; P, purulent; A, autolysis.
†A 278-bp fragment was amplified and sequenced (9).

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