title: Plaque formation by and plaque cloning of Chlamydia trachomatis biovar trachoma.
abstract: A new technique for the induction of plaque formation by Chlamydia trachomatis biovar trachoma applicable to the titration of infectivity and cloning of biovar trachoma was established. Three novel strains were cloned and confirmed to be free of glycogen inclusions. The lack of glycogen accumulation correlated with the absence of a 7.5-kb plasmid, which is highly conserved in other strains of C. trachomatis. Although the growth efficiency of these plasmid-free strains was slightly lower than that of plasmid-positive strains, possession of the plasmid and glycogen accumulation were not essential for the survival of C. trachomatis.
authors.affiliation: Department of Microbiology, Kawasaki Medical School, Kurashiki, Okayama 701-0192, Japan. akimat@med.kawasaki-m.ac.jp
authors.forename: A
authors.initials: A
authors.lastname: Matsumoto
authors.forename: H
authors.initials: H
authors.lastname: Izutsu
authors.forename: N
authors.initials: N
authors.lastname: Miyashita
authors.forename: M
authors.initials: M
authors.lastname: Ohuchi
mesh_terms: D000818:Animals; D002692:Chlamydia trachomatis / Q000145:classification* / Q000235:genetics* / Q000254:growth & development / Q000648:ultrastructure; D002691:Chlamydophila psittaci / Q000145:classification / Q000235:genetics; D015825:Chromosomes, Fungal; D003001:Cloning, Molecular; D004271:DNA, Fungal / Q000032:analysis; D006003:Glycogen / Q000378:metabolism; D006801:Humans; D007700:Kinetics; D008854:Microscopy, Electron; D010311:Parrots; D010957:Plasmids; D016133:Polymerase Chain Reaction / Q000379:methods; D015183:Restriction Mapping
chemical_list: D004271:DNA, Fungal; D006003:Glycogen