title: DNA differential diagnosis of taeniasis and cysticercosis by multiplex PCR.
abstract: Multiplex PCR was established for differential diagnosis of taeniasis and cysticercosis, including their causative agents. For identification of the parasites, multiplex PCR with cytochrome c oxidase subunit 1 gene yielded evident differential products unique for Taenia saginata and Taenia asiatica and for American/African and Asian genotypes of Taenia solium with molecular sizes of 827, 269, 720, and 984 bp, respectively. In the PCR-based detection of tapeworm carriers using fecal samples, the diagnostic markers were detected from 7 of 14 and 4 of 9 T. solium carriers from Guatemala and Indonesia, respectively. Test sensitivity may have been reduced by the length of time (up to 12 years) that samples were stored and/or small sample volumes (ca. 30 to 50 mg). However, the diagnostic markers were detected by nested PCR in five worm carriers from Guatemalan cases that were found to be negative by multiplex PCR. It was noteworthy that a 720 bp-diagnostic marker was detected from a T. solium carrier who was egg-free, implying that it is possible to detect worm carriers and treat before mature gravid proglottids are discharged. In contrast to T. solium carriers, 827-bp markers were detected by multiplex PCR in all T. saginata carriers. The application of the multiplex PCR would be useful not only for surveillance of taeniasis and cysticercosis control but also for the molecular epidemiological survey of these cestode infections.
authors.affiliation: Department of Parasitology. Animal Laboratory for Medical Research, Asahikawa Medical College, Asahikawa, Japan. hyamasak@aashikawa-med.ac.jp
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Yamasaki
authors.forename: James C
authors.initials: JC
authors.lastname: Allan
authors.forename: Marcello Otake
authors.initials: MO
authors.lastname: Sato
authors.forename: Minoru
authors.initials: M
authors.lastname: Nakao
authors.forename: Yasuhito
authors.initials: Y
authors.lastname: Sako
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Nakaya
authors.forename: Dongchuan
authors.initials: D
authors.lastname: Qiu
authors.forename: Wulamu
authors.initials: W
authors.lastname: Mamuti
authors.forename: Philip S
authors.initials: PS
authors.lastname: Craig
authors.forename: Akira
authors.initials: A
authors.lastname: Ito
mesh_terms: D000818:Animals; D001483:Base Sequence; D002353:Carrier State; D003551:Cysticercosis / Q000175:diagnosis*; D017931:DNA Primers; D018509:DNA, Helminth / Q000235:genetics* / Q000302:isolation & purification; D003937:Diagnosis, Differential; D005843:Geography; D006801:Humans; D016133:Polymerase Chain Reaction / Q000379:methods*; D013621:Taenia / Q000235:genetics* / Q000302:isolation & purification; D013622:Taeniasis / Q000175:diagnosis*
chemical_list: D017931:DNA Primers; D018509:DNA, Helminth