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The influence of macroinvertebrate abundance on the assessment of freshwater quality in The Netherlands

Kevin Beentjes (Onderzoeker); Arjen Speksnijder (Lector); Menno Schilthuizen (Onderzoeker); Bartholomeus Schaub (Onderzoeker); Berry van der Hoorn (Onderzoeker)

The use of molecular tools for the detection and identification of invertebrate species enables the development of more easily standardisable inventories of biological elements for water quality assessments, as it circumvents human-based bias and errors in species identifications. Current Ecological …

2018-10-12Natuur & LandbouwArtikel

Microbiomes of gall-inducing copepod crustaceans from the corals Stylophora pistillata (Scleractinia) and Gorgonia ventalina (Alcyonacea)

Pavel Shelyakin (Onderzoeker); Sofya K. Garushyants (Onderzoeker); Mikhail A. Nikitin (Onderzoeker); Sofya V. Mudrova (Onderzoeker); Michael Berumen (Onderzoeker); Arjen Speksnijder (Onderzoeker); Bert W. Hoeksema (Onderzoeker); Diego Fontaneto (Onderzoeker); Mikhail S. Gelfand (Onderzoeker); Viatcheslav N. Ivanenko (Onderzoeker)

Corals harbor complex and diverse microbial communities that strongly impact host ftness and resistance to diseases, but these microbes themselves can be infuenced by stresses, like those caused by the presence of macroscopic symbionts. In addition to directly infuencing the host, symbionts may transmit …

2018-08-01Natuur & LandbouwArtikel

Lactobacillus iners-dominated vaginal microbiota is associated with increased susceptibility to Chlamydia trachomatis infection in Dutch women: a case–control study

Robin van Houdt (Onderzoeker); Bing Ma (Onderzoeker); Arjen Speksnijder (Onderzoeker); Jacques Ravel (Onderzoeker); Henry J.C. de Vries (Onderzoeker)

Introduction: This prospective study aimed to study the composition and structure of the vaginal microbiota prior to Chlamydia trachomatis infection. Methods: A nested case-control study was performed in 122 women, half of which acquired C. trachomatis within a year after their first visit. At the first …

2017-09-25Natuur & LandbouwArtikel

Earlier Detection of Hepatitis C Virus Infection Through Routine Hepatitis C Virus Antibody Screening of Human Immunodeficiency Virus-Positive Men Who Have Sex With Men Attending A Sexually Transmitted Infection Outpatient Clinic: A Longitudinal Study

Martijn van Rooijen (Onderzoeker); Titia Heijman (Onderzoeker); Nynke de Vrieze (Onderzoeker); Anouk Urbanus (Onderzoeker); Arjen Speksnijder (Onderzoeker); Petra van Leeuwen (Onderzoeker); Henri de Vries (Onderzoeker); Maria Prins (Onderzoeker)

Background In 2007, routine hepatitis C virus (HCV) antibody testing was introduced for men who have sex with men (MSM) with a human immunodeficiency virus (HIV)-positive or unknown status attending a Dutch sexually transmitted infection (STI) outpatient clinic. We evaluated whether this screening resulted …

2016-09-01Natuur & LandbouwArtikel

Molecular assessment of bacterial vaginosis by Lactobacillus abundance and species diversity

Joke A.M. Dols (Onderzoeker); Douwe Molenaar (Onderzoeker); Jannie J. van der Helm (Onderzoeker); M.P.M. Caspers (Onderzoeker); Alie de Kat Angelino-Bart (Onderzoeker); Frank H. J. Schuren (Onderzoeker); Arjen Speksnijder (Onderzoeker); Hans V Westerhoff (Onderzoeker); Jan Hendrik Richardus (Onderzoeker); Mathilde E. Boon (Onderzoeker); Gregor Reid (Onderzoeker); Henry J. C. de Vries (Onderzoeker); Remco Kort (Onderzoeker)

Background: To date, women are most often diagnosed with bacterial vaginosis (BV) using microscopy based Nugent scoring or Amsel criteria. However, the accuracy is less than optimal. The aim of the present study was to confirm the identity of known BV-associated composition profiles and evaluate indicators …

2016-04-23Natuur & LandbouwArtikel

The effect of HIV infection on anal and penile human papillomavirus incidence and clearance: a cohort study among MSM

Sofie H. Mooij (Onderzoeker); Daniella K. van Santen (Onderzoeker); Ronald B. Geskus (Onderzoeker); Marianne A.B. van der Sande (Onderzoeker); Roel A. Coutinho (Onderzoeker); Ineke G. Stolte (Onderzoeker); Peter J.F. Snijders (Onderzoeker); Chris J.L.M. Meijer (Onderzoeker); Arjen Speksnijder (Onderzoeker); Henry J.C. de Vries (Onderzoeker); Audrey J. King (Onderzoeker); Arne van Eeden (Onderzoeker); Maarten F. Schim van der Loeff (Onderzoeker)

Objectives: A large portion of anogenital cancers is caused by high-risk human papillomavirus (hrHPV) infections, which are especially common in HIV-infected men. We aimed to compare the incidence and clearance of anal and penile hrHPV infection between HIV-infected and HIV-negative MSM. Design: Analyses …

2016-01-02GezondheidArtikel

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