Abstract
Chlamydophila abortus and Waddlia chondrophila cause abortion in ruminants. We investigated the role of Parachlamydia acanthamoebae in bovine abortion. Results of immunohistochemical analyses were positive in 30 (70%) of 43 placentas from which Chlamydia-like DNA was amplified, which supports the role of Parachlamydia spp. in bovine abortion.
Highlights
Chlamydophila abortus and Waddlia chondrophila cause abortion in ruminants
Simkania negevensis is considered a possible emerging agent of pneumonia [4], and evidence supports the role of Parachlamydia acanthamoebae as an agent of pneumonia [5,6]
To confirm the role of these novel chlamydiae in bovine abortion, we analyzed these placental samples from cattle in Switzerland by using a new specific immunohistochemical protocol and transmission electron microscopy
Summary
Chlamydophila abortus and Waddlia chondrophila cause abortion in ruminants. We investigated the role of Parachlamydia acanthamoebae in bovine abortion. Waddlia chondrophila is another Chlamydia-like organism initially isolated from lung, liver, and other tissues of an aborted bovine fetus in the United States [7]. The role of Chlamydia-like organisms in bovine abortion is further supported by results of a study of abortion in cattle in Graubünden, Switzerland [9]. Analysis of placental specimens by PCR showed that 43 (18.3%) of 235 placentas contained DNA from Chlamydia-like organisms [9].
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