Taxonomy and Molecular Taxonomy

Ryan, Una; Xiao, Lihua

doi:10.1007/978-3-7091-1562-6_1

Cited by 33 publications

(36 citation statements)

References 202 publications

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“…Several genotypes including tortoise genotype I and snake genotypes I and II have also been identified (cf. Ryan and Xiao, 2014), which have not been reported in humans. A new intestinal species, Cryptosporidium ducismarci has been reported in several species of tortoises, snakes and lizards (Traversa, 2010).…”

Section: Cryptosporidium In Birdsmentioning

confidence: 53%

“…In addition, C. hominis, C. parvum, Cryptosporidium serpentis, C. muris, C. andersoni and muskrat genotype I have also been identified in a small number of birds, most of which were probably the results of accidental ingestion of oocysts by these organisms (cf. Ryan, 2010;Ryan and Xiao, 2014).…”

Section: Cryptosporidium In Birdsmentioning

confidence: 99%

“…A total of 13 additional species/genotypes have been identified in fish using molecular tools; piscine genotypes 1-8, rat genotype III, C. parvum, C. hominis C. xiaoi and C. scrofarum (cf. Koinari et al 2013;Ryan and Xiao, 2014). The very low prevalence of C. parvum and C. hominis in fish (< 1%) suggests that fish are not an important reservoir for human infection.…”

Section: Cryptosporidium In Birdsmentioning

confidence: 99%

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Cryptosporidiumspecies in humans and animals: current understanding and research needs

2014

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S U M M A R YCryptosporidium is increasingly recognized as one of the major causes of moderate to severe diarrhoea in developing countries. With treatment options limited, control relies on knowledge of the biology and transmission of the members of the genus responsible for disease. Currently, 26 species are recognized as valid on the basis of morphological, biological and molecular data. Of the nearly 20 Cryptosporidium species and genotypes that have been reported in humans, Cryptosporidium hominis and Cryptosporidium parvum are responsible for the majority of infections. Livestock, particularly cattle, are one of the most important reservoirs of zoonotic infections. Domesticated and wild animals can each be infected with several Cryptosporidium species or genotypes that have only a narrow host range and therefore have no major public health significance. Recent advances in next-generation sequencing techniques will significantly improve our understanding of the taxonomy and transmission of Cryptosporidium species, and the investigation of outbreaks and monitoring of emerging and virulent subtypes. Important research gaps remain including a lack of subtyping tools for many Cryptosporidium species of public and veterinary health importance, and poor understanding of the genetic determinants of host specificity of Cryptosporidium species and impact of climate change on the transmission of Cryptosporidium.

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Section: Cryptosporidium In Birdsmentioning

confidence: 53%

Section: Cryptosporidium In Birdsmentioning

confidence: 99%

Section: Cryptosporidium In Birdsmentioning

confidence: 99%

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Cryptosporidiumspecies in humans and animals: current understanding and research needs

2014

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“…Molecular characterization has identified additional piscine genotypes (piscine genotypes 2-8, C. molnari-like and 5 un-named novel genotypes) as well as C. parvum, C. xiaoi, C. scrofarum, C. hominis and rat genotype III in adult and juvenile fish (Murphy et al, 2009;Reid et al, 2010;Zanguee et al, 2010;Barugahare et al, 2011;Morine et al, 2012;Koinari et al, 2013;Ryan and Xiao, 2014;Certad et al, 2015;Yang et al, 2015). In the present study, we present evidence of a disseminated case of cryptosporidiosis in the gills, all parenchymous organs and intestines of a Koi carp (Cyprinus carpio) and molecular identification as a novel isolate, that was most closely related to C. molnari.…”

Section: Scopthalmus Maximus)mentioning

confidence: 99%

“…Relatively little is known about Cryptosporidium species infecting piscine hosts but cryptosporidiosis in fish can cause high morbidity and a variety of clinical signs (AlvarezPellitero and Sitja-Bobadilla, 2002;Alvarez-Pellitero et al, 2004;Ryan et al, 2004;Murphy et al, 2009;Zanguee et al, 2010;Ryan and Xiao, 2014;Ryan et al, 2015;Yang et al, 2015). Currently three species are recognized in fish hosts; Cryptosporidium molnari which was originally described in gilthead sea bream (Sparus aurata) and European sea bass (Dicentrarchus labarx) (AlvarezPellitero and Sitja-Bobadilla, 2002) and was characterised genetically in 2010 (Palenzuela et al, 2010), (2) Cryptosporidium scophthalmi was described in turbot in 2004 (Psetta maxima.…”

Section: Introductionmentioning

confidence: 99%

Molecular characterisation of a disseminated Cryptosporidium infection in a Koi carp (Cyprinus carpio)

Yang

Dorrestein

Ryan

2016

Veterinary Parasitology

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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First genetic analysis of Cryptosporidium from humans from Tasmania, and identification of a new genotype from a traveller to Bali

et al. 2014

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Little is known about the molecular composition of Cryptosporidium species from humans living in the insular state of Tasmania, Australia. In the present study, we genetically characterized 82 samples of Cryptosporidium from humans following conventional coproscopic testing in a routine, diagnostic laboratory. Using a PCR-coupled single-strand conformation polymorphism (SSCP) technique, targeting portions of the small subunit rRNA (SSU), and 60 kDa glycoprotein (gp60) loci, we identified two species of Cryptosporidium, including C. hominis (subgenotypes IbA10G2, IdA16, IeA12G3T3, and IfA19G1) and C. parvum (IIaA16G1R1 and IIaA18G3), and a new operational taxonomic unit (OTU) that genetically closely resembled C. wrairi. This OTU was further characterized using markers in the actin, Cryptosporidium oocyst wall protein (COWP), and 70 kDa heat shock protein (hsp70) genes. This study provides the first characterization of species and genotypes of Cryptosporidium from Tasmania, and presents clear genetic evidence, using five independent genetic loci, for a new genotype or species of Cryptosporidium in a Tasmanian person with a recent history of travelling to Bali, Indonesia. It would be interesting to undertake detailed molecular-based studies of Cryptosporidium in Indonesia and neighbouring countries, in conjunction with morphological and experimental investigations of new genotypes.

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Taxonomy and Molecular Taxonomy

Cited by 33 publications

References 202 publications

Cryptosporidiumspecies in humans and animals: current understanding and research needs

Cryptosporidiumspecies in humans and animals: current understanding and research needs

Molecular characterisation of a disseminated Cryptosporidium infection in a Koi carp (Cyprinus carpio)

First genetic analysis of Cryptosporidium from humans from Tasmania, and identification of a new genotype from a traveller to Bali

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