Waddliaceae

Waddliaceae is a family of bacteria in the order Chlamydiales, class Chlamydiae, phylum Chlamydiae, domain Bacteria. Species in this family have a chlamydia-like cycle of replication and their ribosomal RNA genes are 80–90% identical to ribosomal genes in the Chlamydiaceae. Waddliaceae currently includes one genus: "Waddlia".

The type species is "Waddlia chondrophila" strain WSU 86-1044T, which was isolated from the tissues of a first-trimester aborted bovine fetus. Isolated in 1986, this species was originally characterized as a Rickettsia. DNA sequencing of the ribosomal genes corrected the characterization. Another "W. chondrophila" strain, 2032/99, was found along with "Neospora caninum" in a septic stillborn calf.

The species "Waddlia malaysiensis" G817 has been proposed. "W. malaysiensis" was identified in the urine of Malaysian fruit bats ("Eonycteris spelaea").