title: [Molecular characterization of Cryptosporidium spp. isolated in humans in two different locations in Spain].
abstract: Molecular PCR based diagnostic techniques have enabled us to distinguish between the different, morphologically identical, Cryptosporidium species that can infect humans. Of the 23 recognized species in the genus, at least 9 are able to infect humans. As the intensity of the clinical manifestations, pathogenicity, excretion of oocysts, and incidence, are different between this species, molecular studies are crucial for a better understanding of the epidemiology of human cryptosporidiosis. Samples form two independent studies are analyzed in this publication. One included 23 samples from Madrid, and the other, 72 samples from La Coruña. All of them positive for Cryptosporidium spp. by microscopic methods and belonging to isolated cases of human cryptosporidiosis. For the identification of the species responsible for the infection, the 18S rDNA diagnostic region and the COWP gene diagnostic regions were used. Out of the 95 samples tested, in 77 cases we were able to extract and amplify DNA. In those cases the species responsible for the infection were: C. parvum (40 cases, 2 Madrid and 38 La Coruña), C. hominis (30 cases, 10 Madrid and 20 La Coruña) and C. meleagridis (2 cases, 1 Madrid and 1 La Coruña). In 5 samples it was impossible to detect the species responsible for the infection, but their positivity was confirmed by PCR (4 Madrid and 1 La Coruña). The genotypes of the isolates from patients correlated well with animals from the same regions.
authors.affiliation: División de Parasitología, Universidad Miguel Hernández, San Juan de Alicante, Alicante, España. Electronic address: lnavarro@umh.es.
authors.forename: Luis
authors.initials: L
authors.lastname: Navarro-I-Martinez
authors.forename: Alexandre J
authors.initials: AJ
authors.lastname: da Silva
authors.forename: José
authors.initials: J
authors.lastname: Llovo Taboada
authors.forename: Carmen
authors.initials: C
authors.lastname: Del Águila
authors.forename: Norman J
authors.initials: NJ
authors.lastname: Pieniazek
authors.forename: Fernando J
authors.initials: FJ
authors.lastname: Bornay-Llinares
mesh_terms: D017088:AIDS-Related Opportunistic Infections / Q000453:epidemiology / Q000469:parasitology; D000328:Adult; D000818:Animals; D002648:Child; D003457:Cryptosporidiosis / Q000453:epidemiology / Q000469:parasitology* / Q000662:veterinary; D003458:Cryptosporidium / Q000145:classification / Q000235:genetics / Q000302:isolation & purification*; D016054:DNA, Protozoan / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D005243:Feces / Q000469:parasitology; D006801:Humans; D007121:Immunocompetence; D016133:Polymerase Chain Reaction; D015800:Protozoan Proteins / Q000235:genetics; D016053:RNA, Protozoan / Q000235:genetics; D012337:RNA, Ribosomal, 18S / Q000235:genetics; D021521:Ribotyping; D012689:Sequence Homology, Nucleic Acid; D013030:Spain / Q000453:epidemiology; D013045:Species Specificity; D015047:Zoonoses
chemical_list: D016054:DNA, Protozoan; D004275:DNA, Ribosomal; D015800:Protozoan Proteins; D016053:RNA, Protozoan; D012337:RNA, Ribosomal, 18S; C106305:oocyst wall protein, Cryptosporidium