scholarly journals Cryptosporidium spp. in Domestic Dogs: the “Dog” Genotype

2000 ◽  
Vol 66 (5) ◽  
pp. 2220-2223 ◽  
Author(s):  
Una M. Morgan ◽  
Lihua Xiao ◽  
Paul Monis ◽  
Abbie Fall ◽  
Peter J. Irwin ◽  
...  
Keyword(s):  
18S Rrna ◽  
18S Rrna Gene ◽  
Domestic Dogs ◽  
Heat Shock Gene ◽  
Valid Species ◽  
Rrna Gene ◽  
Phylogenetic Characterization ◽  
Cryptosporidium Spp ◽  
Shock Gene

ABSTRACT Genetic and phylogenetic characterization ofCryptosporidium isolates at two loci (18S rRNA gene and heat shock gene) from both Australian and United States dogs demonstrated that dog-derived Cryptosporidium isolates had a distinct genotype which is conserved across geographic areas. Phylogenetic analysis provided support for the idea that the “dog” genotype is, in fact, a valid species.

scholarly journals The first study of molecular prevalence and species characterization of Cryptosporidium in free-range chicken (Gallus gallus domesticus) from Brazil

2017 ◽  
Vol 26 (4) ◽  
pp. 472-478 ◽  
Author(s):  
Maria Paula de Carvalho Ewald ◽  
Felippe Danyel Cardoso Martins ◽  
Eloiza Teles Caldart ◽  
Fernando Emmanuel Gonçalves Vieira ◽  
Milton Hissashi Yamamura ◽  
...  
Keyword(s):  
18S Rrna ◽  
18S Rrna Gene ◽  
Rrna Gene ◽  
Gallus Gallus Domesticus ◽  
Free Range ◽  
Cryptosporidium Spp ◽  
High Prevalence ◽  
Cryptosporidium Oocysts ◽  
Genotype C

Abstract Rearing free-range chicken is based on grazing feeding patterns, and these animals could be potential environmental contaminants of Cryptosporidium oocysts for humans and other animals. Therefore, the present study aimed to evaluate the molecular prevalence of Cryptosporidium spp. in free-range chickens from Brazil. A total of 351 fecal samples from chickens were examined from 20 farms. For detection of Cryptosporidium spp., 18S rRNA gene fragments were amplified using a nested PCR reaction. Positive samples were sent for sequencing. The overall prevalence of Cryptosporidium was 25.6% (95% CI = 21.2% - 30.6%). Sequencing of the amplified fragments allowed for the identification of three species: C. meleagridis in 57 (62.6%), C. baileyi in 15 (16.4%), C. parvum in 3 (3.2%) samples, and a new Cryptosporidium genotype (C. genotype BrPR1) in 3 (3.2%) samples. Cryptosporidium genotype BrPR1 has not yet been classified as a species, and its host spectrum is not known. Cryptosporidium, including zoonotic species, exists at a high prevalence in free-range chickens within the region studied.

scholarly journals Molecular Characterization of Ciliate Diversity in Stream Biofilms

2008 ◽  
Vol 74 (6) ◽  
pp. 1740-1747 ◽  
Author(s):  
Andrew Dopheide ◽  
Gavin Lear ◽  
Rebecca Stott ◽  
Gillian Lewis
Keyword(s):  
18S Rrna ◽  
Pcr Primers ◽  
18S Rrna Gene ◽  
Sequence Diversity ◽  
Rrna Genes ◽  
Rrna Gene ◽  
Sequencing Analysis ◽  
Specific Pcr ◽  
Stream Biofilms

ABSTRACT Free-living protozoa are thought to be of fundamental importance in aquatic ecosystems, but there is limited understanding of their diversity and ecological role, particularly in surface-associated communities such as biofilms. Existing eukaryote-specific PCR primers were used to survey 18S rRNA gene sequence diversity in stream biofilms but poorly revealed protozoan diversity, demonstrating a need for protozoan-targeted primers. Group-specific PCR primers targeting 18S rRNA genes of the protozoan phylum Ciliophora were therefore designed and tested using DNA extracted from cultured protozoan isolates. The two most reliable primer combinations were applied to stream biofilm DNA, followed by cloning and sequencing analysis. Of 44 clones derived from primer set 384F/1147R, 86% were of probable ciliate origin, as were 25% of 44 clones detected by primer set 121F/1147R. A further 29% of 121F/1147R-detected clones matched sequences from the closely related phylum Apicomplexa. The highly ciliate-specific primer set 384F/1147R was subsequently used in PCRs on biofilm DNA from four streams exhibiting different levels of human impact, revealing differences in ciliate sequence diversity in samples from each site. Of a total of 240 clones, 73% were of probable ciliate origin; 54 different putative ciliate sequences were detected from throughout seven taxonomic ciliate classes. Sequences from Oligohymenophorea were most commonly detected in all samples, followed by either Spirotrichea or Phyllopharyngea. Restriction fragment length polymorphism profile-based analysis of clones suggested a potentially higher level of diversity than did sequencing. Nevertheless, newly designed PCR primers 384F/1147R were considered to provide an effective molecular basis for characterization of ciliate diversity in stream biofilms.

scholarly journals Genotypic Characterization of Torymus sinensis (Hymenoptera: Torymidae) After Its Introduction in Tuscany (Italy) for the Biological Control of Dryocosmus kuriphilus (Hymenoptera: Cynipidae)

2019 ◽  
Vol 19 (4) ◽  
Author(s):  
Ambra Viviani ◽  
Rodolfo Bernardi ◽  
Andrea Cavallini ◽  
Elisabetta Rossi
Keyword(s):  
Biological Control ◽  
18S Rrna ◽  
18S Rrna Gene ◽  
Its2 Region ◽  
Rrna Gene ◽  
Gall Wasp ◽  
Dryocosmus Kuriphilus ◽  
Torymus Sinensis ◽  
The World

Abstract Torymus sinensis Kamijo (Hymenoptera: Torymidae) is an alien parasitoid that is used in many areas of the world for biological control the Asian chestnut gall wasp, Dryocosmus kuriphilus Yasumatsu (Hymenoptera: Cynipidae). In Italy, this parasitoid was imported from Japan in 2003 and subsequently multiplied and released throughout the country. In this study, a phylogenetic investigation was carried out on insects from three different sites in northern Tuscany (Italy). Moreover, the possible hybridization between T. sinensis and some native Torymus species was evaluated. The conserved region 18S rRNA gene and the hypervariable ITS2 (Internal Transcribed Spacer 2) region of the ribosomal cistrone were selected as molecular markers. Sequencing the amplified products, after cloning, ruled out any hybridization between T. sinensis and the native Torymus species, and also confirmed the presence of two haplotypes for the Tuscan population of T. sinensis both for the region of the 18S rRNA gene as well as for the ITS2 region. These results confirm that the environmental impact of the alien parasitoid T. sinensis in the study site is acceptable, although an extensive and repeated monitoring would be desirable.

scholarly journals Genetic characterization of Strongyloides spp. from captive, semi-captive and wild Bornean orangutans (Pongo pygmaeus) in Central and East Kalimantan, Borneo, Indonesia

Parasitology ◽  
2011 ◽  
Vol 138 (11) ◽  
pp. 1417-1422 ◽  
Author(s):  
E. M. LABES ◽  
N. WIJAYANTI ◽  
P. DEPLAZES ◽  
A. MATHIS
Keyword(s):  
18S Rrna ◽  
Genetic Characterization ◽  
18S Rrna Gene ◽  
Rdna Locus ◽  
Rrna Gene ◽  
Fecal Material ◽  
East Kalimantan ◽  
The One ◽  
Bornean Orangutans

SUMMARYOrangutans (Pongo spp.), Asia's only great apes, are threatened in their survival due to habitat loss, hunting and infections. Nematodes of the genus Strongyloides may represent a severe cause of death in wild and captive individuals. In order to better understand which Strongyloides species/subspecies infect orangutans under different conditions, larvae were isolated from fecal material collected in Indonesia from 9 captive, 2 semi-captive and 9 wild individuals, 18 captive groups of Bornean orangutans and from 1 human working with wild orangutans. Genotyping was done at the genomic rDNA locus (part of the 18S rRNA gene and internal transcribed spacer 1, ITS1) by sequencing amplicons. Thirty isolates, including the one from the human, could be identified as S. fuelleborni fuelleborni with 18S rRNA gene identities of 98·5–100%, with a corresponding published sequence. The ITS1 sequences could be determined for 17 of these isolates revealing a huge variability and 2 main clusters without obvious pattern with regard to attributes of the hosts. The ITS1 amplicons of 2 isolates were cloned and sequenced, revealing considerable variability indicative of mixed infections. One isolate from a captive individual was identified as S. stercoralis (18S rRNA) and showed 99% identity (ITS1) with S. stercoralis sequences from geographically distinct locations and host species. The findings are significant with regard to the zoonotic nature of these parasites and might contribute to the conservation of remaining orangutan populations.

scholarly journals Characterization of Hydrocortisone Biometabolites and 18S rRNA Gene in Chlamydomonas reinhardtii Cultures

Molecules ◽  
2008 ◽  
Vol 13 (10) ◽  
pp. 2416-2425 ◽  
Author(s):  
Younes Ghasemi ◽  
Sara Rasoul-Amini ◽  
Mohammad Morowvat ◽  
Mohammad Raee ◽  
Mohammad Ghoshoon ◽  
...  
Keyword(s):  
Chlamydomonas Reinhardtii ◽  
18S Rrna ◽  
18S Rrna Gene ◽  
Rrna Gene

scholarly journals Molecular Characterization of Cryptosporidium Isolates from Humans and Animals in Iran

2006 ◽  
Vol 73 (3) ◽  
pp. 1033-1035 ◽  
Author(s):  
Ahmad Reza Meamar ◽  
Karine Guyot ◽  
Gabriela Certad ◽  
Eduardo Dei-Cas ◽  
Mino Mohraz ◽  
...  
Keyword(s):  
Molecular Characterization ◽  
18S Rrna ◽  
18S Rrna Gene ◽  
Rrna Gene ◽  
Predominant Species ◽  
Animal Hosts

ABSTRACT Isolates of Cryptosporidium spp. from human and animal hosts in Iran were characterized on the basis of both the 18S rRNA gene and the Laxer locus. Three Cryptosporidium species, C. hominis, C. parvum, and C. meleagridis, were recognized, and zoonotically transmitted C. parvum was the predominant species found in humans.

scholarly journals Characterization of a single group I intron in the 18S rRNA gene of the pathogenic fungusHistoplasma capsulatum

1998 ◽  
Vol 36 (4) ◽  
pp. 205-212 ◽  
Author(s):  
Brent A. Lasker ◽  
Gwen W. Smith ◽  
George S. Kobayashi ◽  
Anne M. Whitney ◽  
Leonard W. Mayer
Keyword(s):  
18S Rrna ◽  
Group I Intron ◽  
18S Rrna Gene ◽  
Rrna Gene ◽  
Single Group ◽  
Group I

A new set of primers directed to 18S rRNA gene for molecular identification of Cryptosporidium spp. and their performance in the detection and differentiation of oocysts shed by synanthropic rodents

2013 ◽  
Vol 135 (3) ◽  
pp. 551-557 ◽  
Author(s):  
Sheila O.S. Silva ◽  
Leonardo J. Richtzenhain ◽  
Iracema N. Barros ◽  
Alessandra M.M. C. Gomes ◽  
Aristeu V. Silva ◽  
...  
Keyword(s):  
Molecular Identification ◽  
18S Rrna ◽  
18S Rrna Gene ◽  
Rrna Gene ◽  
Cryptosporidium Spp ◽  
Synanthropic Rodents

scholarly journals First molecular characterization of Cryptosporidium from three different points of two main rivers in Kuantan, Malaysia using 18S rRNA gene nested PCR

2017 ◽  
Vol 7 (9) ◽  
pp. 548-552 ◽  
Author(s):  
Mohd Aiman Barudin ◽  
◽  
Muhammad Lokman Md Isa ◽  
Noratikah Othman ◽  
Afzan Mat Yusof ◽  
...  
Keyword(s):  
Molecular Characterization ◽  
Nested Pcr ◽  
18S Rrna ◽  
18S Rrna Gene ◽  
Rrna Gene
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