title: Cryptosporidium suis n. sp. (Apicomplexa: Cryptosporidiidae) in pigs (Sus scrofa).
abstract: Molecular and biological characteristics of a new species of Cryptosporidium from the feces of pigs (Sus scrofa) is described. Oocysts are structurally indistinguishable from those of Cryptosporidium parvum; they are passed fully sporulated, lack sporocysts, and measure 4.9-4.4 microm (mean = 4.6 microm) x 4.0-4.3 microm (mean = 4.2 microm); length to width ratio 1.1 (n = 50). Cryptosporidium suis is not transmissible to nude mice and is poorly infectious for cattle. Molecular and phylogenetic analyses at the 18S ribosomal RNA, heat shock protein 70, and actin gene loci demonstrate C. suis to be genetically distinct from all known species and genotypes of Cryptosporidium, and thus is named as Cryptosporidium suis.
authors.affiliation: Division of Health Sciences, Murdoch University, Murdoch Drive, Murdoch, Perth, WA 6150, Australia. unaryan@central.murdoch.edu.au
authors.forename: U M
authors.initials: UM
authors.lastname: Ryan
authors.forename: P
authors.initials: P
authors.lastname: Monis
authors.forename: H L
authors.initials: HL
authors.lastname: Enemark
authors.forename: I
authors.initials: I
authors.lastname: Sulaiman
authors.forename: B
authors.initials: B
authors.lastname: Samarasinghe
authors.forename: C
authors.initials: C
authors.lastname: Read
authors.forename: R
authors.initials: R
authors.lastname: Buddle
authors.forename: I
authors.initials: I
authors.lastname: Robertson
authors.forename: L
authors.initials: L
authors.lastname: Zhou
authors.forename: R C A
authors.initials: RC
authors.lastname: Thompson
authors.forename: L
authors.initials: L
authors.lastname: Xiao
mesh_terms: D000818:Animals; D001483:Base Sequence; D003457:Cryptosporidiosis / Q000469:parasitology / Q000662:veterinary*; D003458:Cryptosporidium / Q000145:classification* / Q000235:genetics* / Q000302:isolation & purification; D016054:DNA, Protozoan / Q000737:chemistry; D004275:DNA, Ribosomal / Q000737:chemistry*; D005243:Feces / Q000469:parasitology; D005838:Genotype; D016013:Likelihood Functions; D008857:Microscopy, Interference / Q000662:veterinary; D008969:Molecular Sequence Data; D033661:Oocysts / Q000648:ultrastructure; D010802:Phylogeny; D016053:RNA, Protozoan / Q000235:genetics; D012337:RNA, Ribosomal, 18S / Q000235:genetics*; D016415:Sequence Alignment / Q000662:veterinary; D013552:Swine; D013553:Swine Diseases / Q000469:parasitology*; D013557:Switzerland; D014904:Western Australia
chemical_list: D016054:DNA, Protozoan; D004275:DNA, Ribosomal; D016053:RNA, Protozoan; D012337:RNA, Ribosomal, 18S