Christen Rune Stensvold

62 posts · 35,659 views

I hold a PhD in Health Sciences and have been working in the field of clinical microbiology for almost 10 years. My research deals with the diagnosis, epidemiology, clinical significance, genetic diversity, and taxonomy of common intestinal 'amoebae' with special emphasis on Blastocystis. Since 2006, I have published about 60 scientific, peer-reviewed papers, of which 25 or so are Blastocystis-specific papers. I'm based at the Department of Microbiology and Infection Control, Statens Serum Institut, Copenhagen, Denmark and did my post doc at London School of Hygiene & Tropical Medicine. F1000 Associate Faculty Member (since 09 December 2009). ORCID # 0000-0002-1417-7048 Facebook page: https://www.facebook.com/pages/Blastocystis-Parasite-Blog/161212370703270

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  • September 30, 2014
  • 12:34 PM
  • 20 views

This Month in Blastocystis Research (SEP 2014)

by Christen Rune Stensvold in Blastocystis Parasite Blog

Do companion animals contribute to human Blastocystis? Do IBS patients have a higher prevalence of Blastocystis and Dientamoeba fragilis than healthy invididuals? Check out this issue of 'This Month in Blastocystis Research'.... Read more »

Krogsgaard LR, Engsbro AL, Stensvold CR, Vedel Nielsen H, & Bytzer P. (2014) The Prevalence of Intestinal Parasites is not Greater Among Individuals with IBS: a Population-Based Case-Control Study. Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association. PMID: 25229421  

Wang W, Cuttell L, Bielefeldt-Ohmann H, Inpankaew T, Owen H, & Traub RJ. (2013) Diversity of Blastocystis subtypes in dogs in different geographical settings. Parasites , 215. PMID: 23883734  

Wawrzyniak I, Poirier P, Viscogliosi E, Dionigia M, Texier C, Delbac F, & Alaoui HE. (2013) Blastocystis, an unrecognized parasite: an overview of pathogenesis and diagnosis. Therapeutic advances in infectious disease, 1(5), 167-78. PMID: 25165551  

  • August 24, 2014
  • 09:38 AM
  • 158 views

This Month in Blastocystis Research (AUG 2014)

by Christen Rune Stensvold in Blastocystis Parasite Blog

August 2014 saw interesting data emerging on Blastocystis in the background population, mRNA polyadnylation in the Blastocystis nuclear genome which calls for genome reannotation, and a large focus on Blastocystis in the ICOPA 2014 Congress in Mexico City.... Read more »

Fayer R, Elsasser T, Gould R, Solano G, Urban J Jr, & Santin M. (2014) Blastocystis tropism in the pig intestine. Parasitology research, 113(4), 1465-72. PMID: 24535732  

  • July 28, 2014
  • 03:10 PM
  • 277 views

This Month In Blastocystis Research (JUL 2014)

by Christen Rune Stensvold in Blastocystis Parasite Blog

A new study from Colombia sees Blastocystis as a quasi-ubiquitous organism.... Read more »

  • July 3, 2014
  • 07:44 PM
  • 240 views

This Month in Blastocystis Research (JUN 2014) - IMECs Edition

by Christen Rune Stensvold in Blastocystis Parasite Blog

A rare and extremely timely study using NGS tools to sequence DNA from intestinal microbial eukaryotic communities has been published in June 2014 in Frontiers in Microbiology; here's a small review.... Read more »

Parfrey, L., Walters, W., Lauber, C., Clemente, J., Berg-Lyons, D., Teiling, C., Kodira, C., Mohiuddin, M., Brunelle, J., Driscoll, M.... (2014) Communities of microbial eukaryotes in the mammalian gut within the context of environmental eukaryotic diversity. Frontiers in Microbiology. DOI: 10.3389/fmicb.2014.00298  

  • June 1, 2014
  • 12:30 AM
  • 287 views

This Month in Blastocystis Research (MAY 2014)

by Christen Rune Stensvold in Blastocystis Parasite Blog

Musings on Mucins... ... Read more »

Hansson GC. (2012) Role of mucus layers in gut infection and inflammation. Current opinion in microbiology, 15(1), 57-62. PMID: 22177113  

Fayer R, Elsasser T, Gould R, Solano G, Urban J Jr, & Santin M. (2014) Blastocystis tropism in the pig intestine. Parasitology research, 113(4), 1465-72. PMID: 24535732  

Johansson ME, Sjövall H, & Hansson GC. (2013) The gastrointestinal mucus system in health and disease. Nature reviews. Gastroenterology , 10(6), 352-61. PMID: 23478383  

Van den Abbeele, P., Roos, S., Eeckhaut, V., MacKenzie, D., Derde, M., Verstraete, W., Marzorati, M., Possemiers, S., Vanhoecke, B., Van Immerseel, F.... (2012) Incorporating a mucosal environment in a dynamic gut model results in a more representative colonization by lactobacilli. Microbial Biotechnology, 5(1), 106-115. DOI: 10.1111/j.1751-7915.2011.00308.x  

  • May 15, 2014
  • 08:53 AM
  • 285 views

Medscape: New Research Questions Pathogenicity of Parasite Dientamoeba fragilis

by Christen Rune Stensvold in Blastocystis Parasite Blog

Data emerging from European labs do not exactly support a role for Dientamoeba fragilis in disease. Dientamoeba made it to the headlines of Medscape Medical News from the 24th European Congress of Clinical Microbiology and Infections Diseases (ECCMID 2014) in Barcelona.... Read more »

Stensvold CR, Clark CG, & Röser D. (2013) Limited intra-genetic diversity in Dientamoeba fragilis housekeeping genes. Infection, genetics and evolution : journal of molecular epidemiology and evolutionary genetics in infectious diseases, 284-6. PMID: 23681023  

  • May 12, 2014
  • 03:30 PM
  • 279 views

Dientamoeba: To encyst or Not to Encyst?

by Christen Rune Stensvold in Christen Rune Stensvold

There is an interesting discussion going on at the moment on Dientamoeba fragilis transmission. There are bits of evidence that D. fragilis may be passed on to an individual by pinworm. But is it also possible that an unrecognised cyst stage may be a vehicle of transmission?... Read more »

Stark D, Garcia LS, Barratt JL, Phillips O, Roberts T, Marriott D, Harkness J, & Ellis JT. (2014) Description of Dientamoeba fragilis cyst and precystic forms from human samples. Journal of clinical microbiology. PMID: 24808242  

Clark CG, Röser D, & Stensvold CR. (2014) Transmission of Dientamoeba fragilis: pinworm or cysts?. Trends in parasitology, 30(3), 136-40. PMID: 24492020  

  • May 10, 2014
  • 08:12 AM
  • 392 views

Parasite-Microbiota-Host Interactions

by Christen Rune Stensvold in Blastocystis Parasite Blog

In order to identify the role of Blastocystis in human health and disease, it's important to explore and recognise the potential spectrum of parasite-microbiota-host interactions.... Read more »

  • May 1, 2014
  • 07:30 PM
  • 364 views

This Month In Blastocystis Research (April 2014)

by Christen Rune Stensvold in Blastocystis Parasite Blog

DNA-based diagnosis of intestinal organisms, including parasites, is here to stay. Will the current single-/multiplex approach develop into a pan-diagnostic approach?... Read more »

  • April 29, 2014
  • 10:58 AM
  • 333 views

Review on Sarcocystis

by Christen Rune Stensvold in Blastocystis Parasite Blog

Despite the fact that humans can serve as both intermediate and final hosts of Sarcocystis, and despite the fact that muscular sarcocystosis can cause severe disease, still very little is know about most epidemiological and clinical aspects of the parasite. We have tried to come up with some ideas that could potentially advance our understanding of the epidemiological aspects of Sarcocystis and sarcocystosis.... Read more »

  • April 19, 2014
  • 07:34 AM
  • 410 views

Typing Method for Cryptosporidium Meleagridis

by Christen Rune Stensvold in Christen Rune Stensvold

You can read about the development and use of a highly applicable typing method for C. meleagridis isolates in a newly published paper in Journal of Clinical Microbiology.... Read more »

  • April 19, 2014
  • 07:34 AM
  • 458 views

Typing Method for Cryptosporidium Meleagridis

by Christen Rune Stensvold in Blastocystis Parasite Blog

You can read about the development and use of a highly applicable typing method for C. meleagridis isolates in a newly published paper in Journal of Clinical Microbiology.... Read more »

  • April 10, 2014
  • 01:16 AM
  • 339 views

Resources For Blastocystis Epidemiology Research

by Christen Rune Stensvold in Blastocystis Parasite Blog

An inventory of useful free online tools for studying the molecular epidemiology of Blastocystis.... Read more »

Alfellani MA, Taner-Mulla D, Jacob AS, Imeede CA, Yoshikawa H, Stensvold CR, & Clark CG. (2013) Genetic diversity of blastocystis in livestock and zoo animals. Protist, 164(4), 497-509. PMID: 23770574  

Alfellani MA, Stensvold CR, Vidal-Lapiedra A, Onuoha ES, Fagbenro-Beyioku AF, & Clark CG. (2013) Variable geographic distribution of Blastocystis subtypes and its potential implications. Acta tropica, 126(1), 11-8. PMID: 23290980  

Clark CG, van der Giezen M, Alfellani MA, & Stensvold CR. (2013) Recent developments in Blastocystis research. Advances in parasitology, 1-32. PMID: 23548084  

Stensvold CR, Suresh GK, Tan KS, Thompson RC, Traub RJ, Viscogliosi E, Yoshikawa H, & Clark CG. (2007) Terminology for Blastocystis subtypes--a consensus. Trends in parasitology, 23(3), 93-6. PMID: 17241816  

  • April 1, 2014
  • 09:05 PM
  • 336 views

This Month In Blastocystis Research (MAR 2014)

by Christen Rune Stensvold in Blastocystis Parasite Blog

Is Blastocystis a consistent finding in Senegalese children? Novel data seem to suggest so.... Read more »

  • March 16, 2014
  • 03:44 AM
  • 460 views

What's In A Name?

by Christen Rune Stensvold in Blastocystis Parasite Blog

Blastocystis is a parasite. But what makes a parasite, and are all parasites 'bad'?... Read more »

  • February 28, 2014
  • 02:39 PM
  • 550 views

This Month In Blastocystis Research (FEB 2014) - The Protease Edition

by Christen Rune Stensvold in Blastocystis Parasite Blog

The February issue of This Month In Blastocystis Research is mostly about Blastocystis proteases and their potential clinical significance. ... Read more »

Fayer R, Elsasser T, Gould R, Solano G, Urban J Jr, & Santin M. (2014) Blastocystis tropism in the pig intestine. Parasitology research. PMID: 24535732  

Denoeud F, Roussel M, Noel B, Wawrzyniak I, Da Silva C, Diogon M, Viscogliosi E, Brochier-Armanet C, Couloux A, Poulain J.... (2011) Genome sequence of the stramenopile Blastocystis, a human anaerobic parasite. Genome biology, 12(3). PMID: 21439036  

Olivo-Diaz A, Romero-Valdovinos M, Gudiño-Ramirez A, Reyes-Gordillo J, Jimenez-Gonzalez DE, Ramirez-Miranda ME, Martinez-Flores WA, Martinez-Hernandez F, Flisser A, & Maravilla P. (2012) Findings related to IL-8 and IL-10 gene polymorphisms in a Mexican patient population with irritable bowel syndrome infected with Blastocystis. Parasitology research, 111(1), 487-91. PMID: 22287022  

Puthia MK, Vaithilingam A, Lu J, & Tan KS. (2005) Degradation of human secretory immunoglobulin A by Blastocystis. Parasitology research, 97(5), 386-9. PMID: 16151742  

Wawrzyniak I, Texier C, Poirier P, Viscogliosi E, Tan KS, Delbac F, & El Alaoui H. (2012) Characterization of two cysteine proteases secreted by Blastocystis ST7, a human intestinal parasite. Parasitology international, 61(3), 437-42. PMID: 22402106  

Sio SW, Puthia MK, Lee AS, Lu J, & Tan KS. (2006) Protease activity of Blastocystis hominis. Parasitology research, 99(2), 126-30. PMID: 16518611  

  • February 3, 2014
  • 01:55 PM
  • 421 views

This Month In Blastocystis Research (JAN 2014)

by Christen Rune Stensvold in Blastocystis Parasite Blog

This Month In Blastocystis Research is introducing the possible benefits of polyparasitism (!) and pulls out an example of a potentially protecting effect of Blastocystis.... Read more »

Franke MF, Del Castillo H, Pereda Y, Lecca L, Fuertes J, Cárdenas L, Becerra MC, Bayona J, & Murray M. (2013) Parasite Infection and Tuberculosis Disease among Children: A Case-Control Study. The American journal of tropical medicine and hygiene. PMID: 24379242  

Archambaud C, Sismeiro O, Toedling J, Soubigou G, Bécavin C, Lechat P, Lebreton A, Ciaudo C, & Cossart P. (2013) The intestinal microbiota interferes with the microRNA response upon oral Listeria infection. mBio, 4(6). PMID: 24327339  

  • December 11, 2013
  • 02:11 AM
  • 472 views

Molecular Epidemiology: Developing a Language

by Christen Rune Stensvold in Blastocystis Parasite Blog

Standardised methods and broadly accepeted reference data are the bread and butter of molecular epidemiological studies of infectious organisms. This post highlights some of the issues related to molecular epidemiology terminology and draws parallels between research in Blastocystis and Cryptosporidium.... Read more »

Alfellani MA, Taner-Mulla D, Jacob AS, Imeede CA, Yoshikawa H, Stensvold CR, & Clark CG. (2013) Genetic diversity of blastocystis in livestock and zoo animals. Protist, 164(4), 497-509. PMID: 23770574  

Stensvold CR, Suresh GK, Tan KS, Thompson RC, Traub RJ, Viscogliosi E, Yoshikawa H, & Clark CG. (2007) Terminology for Blastocystis subtypes--a consensus. Trends in parasitology, 23(3), 93-6. PMID: 17241816  

Xiao L, Ryan UM, Fayer R, Bowman DD, & Zhang L. (2012) Cryptosporidium tyzzeri and Cryptosporidium pestis: which name is valid?. Experimental parasitology, 130(3), 308-9. PMID: 22230707  

  • December 4, 2013
  • 06:42 PM
  • 467 views

This Month in Blastocystis Research (NOV 2013)

by Christen Rune Stensvold in Blastocystis Parasite Blog

This Month in Blastocystis Research (NOV 2013)is mainly about new diagnostics and various treatment options.... Read more »

Roberts T, Ellis J, Harkness J, Marriott D, & Stark D. (2013) Treatment failure in patients with chronic Blastocystis infection. Journal of medical microbiology. PMID: 24243286  

  • November 22, 2013
  • 05:30 PM
  • 446 views

Do IBS Patients Lack Blastocystis and Dientamoeba??

by Christen Rune Stensvold in Blastocystis Parasite Blog

Healthy individuals appear to be more frequent carriers of the two parasites Blastocystis and Dientamoeba fragilis. We would like to know why and what the public health implications are of this.... Read more »

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