Molecular and phylogenetic characterizations of an Eimeria krijgsmanni Yakimoff & Gouseff, 1938 (Apicomplexa: Eimeriidae) mouse intestinal protozoan parasite by partial 18S ribosomal RNA gene sequence analysis.
Previously, we characterized an undocumented strain of Eimeria krijgsmanni by morphological and biological features. Here, we present a detailed molecular phylogenetic analysis of this organism. Namely, 18S ribosomal RNA gene (rDNA) sequences of E. krijgsmanni were analyzed to incorporate this species into a comprehensive Eimeria phylogeny. As a result, partial 18S rDNA sequence from E. krijgsmanni was successfully determined, and two different types, Type A and Type B, that differed by 1 base pair were identified. E. krijgsmanni was originally isolated from a single oocyst, and thus the result show that the two types might have allelic sequence heterogeneity in the 18S rDNA. Based on phylogenetic analyses, the two types of E. krijgsmanni 18S rDNA formed one of two clades among murine Eimeria spp.; these Eimeria clades reflected morphological similarity among the Eimeria spp. This is the third molecular phylogenetic characterization of a murine Eimeria spp. in addition to E. falciformis and E. papillata.
Laboratory of Parasitology, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima 890-0065, Japan.
Toshinori
T
Takeo
Laboratory of Emerging Infectious Diseases, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima 890-0065, Japan.
Tetsuya
T
Tanaka
Bacterial and Parasitic Disease Research Division, National Institute of Animal Health, National Agriculture and Food Research Organization, 3-1-5 Kannondai, Tsukuba, Ibaraki 305-0856, Japan. Electronic address: matsubayashi@affrc.go.jp.
Makoto
M
Matsubayashi
Laboratory of Emerging Infectious Diseases, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima 890-0065, Japan.
Hiroki
H
Maeda
Laboratory of Emerging Infectious Diseases, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima 890-0065, Japan. Electronic address: k6199431@kadai.jp.
Kodai
K
Kusakisako
Kawasaki, Kanagawa 215-0017, Japan.
Toshihiro
T
Matsui
Laboratory of Emerging Infectious Diseases, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima 890-0065, Japan.
Masami
M
Mochizuki
Laboratory of Parasitology, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima 890-0065, Japan. Electronic address: thmatsuo@vet.kagoshima-u.ac.jp.
Tomohide
T
Matsuo
D000818:Animals; D001483:Base Sequence; D003048:Coccidiosis / Q000469:parasitology*; D016054:DNA, Protozoan / Q000235:genetics; D004539:Eimeria / Q000145:classification* / Q000235:genetics* / Q000254:growth & development / Q000502:physiology; D051379:Mice / Q000469:parasitology; D008813:Mice, Inbred ICR / Q000469:parasitology; D008969:Molecular Sequence Data; D033661:Oocysts / Q000145:classification / Q000254:growth & development / Q000502:physiology; D010802:Phylogeny; D016133:Polymerase Chain Reaction; D012337:RNA, Ribosomal, 18S / Q000235:genetics; D012376:Rodent Diseases / Q000469:parasitology*; D016415:Sequence Alignment / Q000662:veterinary
D016054:DNA, Protozoan; D012337:RNA, Ribosomal, 18S
18S ribosomal RNA gene; Eimeria krijgsmanni; Mouse; Phylogenetic analysis