Publications by authors named "Giessen J"

Cystic and alveolar echinococcosis are severe zoonotic diseases characterized by long asymptomatic periods lasting months or years. Viable Echinococcus spp. eggs released into the environment through the feces of canids can infect humans through accidental ingestion via hand-to-mouth contact or consumption of contaminated food or water.

View Article and Find Full Text PDF

In the Netherlands, living in proximity to goat farms has been consistently associated with an increased incidence of community-acquired pneumonia (CAP). The cause remains largely unknown though airborne microbial agents could play a role. The aim of this study is to explore micro-organisms present in goats that can cause human pneumonia.

View Article and Find Full Text PDF

Background: is a leading cause of infectious diarrhea in both humans and livestock. In particular, strains belonging to sequence type (ST) 11 are common enteropathogens. The aim of this study was to determine the presence and genetic relatedness of types in dairy cattle and calves.

View Article and Find Full Text PDF

Introduction: Literacy about zoonoses can contribute people adapt their behaviour to minimize zoonotic risks. In this study, associations between sociodemographic factors and zoonotic risk-averse attitudes were explored.

Objective: To determine factors significantly associated with literacy about zoonoses across sociodemographic groups to inform targeted interventions aiming at improving awareness and zoonotic risk-avoidance behaviours.

View Article and Find Full Text PDF
Article Synopsis
  • Consumption of raw or undercooked meat can lead to infections from Toxoplasma gondii, but salt and additives in meat may impact the parasite's survival.
  • A new in vitro method was developed to replace the mouse bioassay for testing how salting affects T. gondii viability, using meat samples from infected sheep to evaluate parasite growth in cultured cells.
  • The study found that untreated meat samples had viable T. gondii, while higher salt concentrations (2.7% NaCl) significantly reduced parasite growth, demonstrating the effectiveness of the new in vitro method for assessing T. gondii viability.
View Article and Find Full Text PDF

Human brain development involves an orchestrated, massive neural progenitor expansion while a multi-cellular tissue architecture is established. Continuously expanding organoids can be grown directly from multiple somatic tissues, yet to date, brain organoids can solely be established from pluripotent stem cells. Here, we show that healthy human fetal brain in vitro self-organizes into organoids (FeBOs), phenocopying aspects of in vivo cellular heterogeneity and complex organization.

View Article and Find Full Text PDF

Leptospirosis is a zoonosis caused by the spirochete spp. It is often not clear why certain areas appear to be hotspots for human leptospirosis. Therefore, a predictive risk map for the Netherlands was developed and assessed, based on a random forest model for human leptospirosis incidence levels with various environmental factors and rat density as variables.

View Article and Find Full Text PDF

Aims: The aim of our study was to investigate the virulence and resistance of STEC from small ruminants farms in The Netherlands. Moreover, the potential transmission of STEC between animals and humans on farms was evaluated.

Methods And Results: From 182 farms, in total, 287 unique STEC isolates were successfully recovered from animal samples.

View Article and Find Full Text PDF

Toxoplasmosis caused by the protozoan parasite occurs worldwide. Infections range from asymptomatic to life-threatening. infection is acquired either via bradyzoites in meat or via oocysts in the environment, but the relative importance of these path ways and the different sources remains unclear.

View Article and Find Full Text PDF
Article Synopsis
  • A study investigates a zoonotic parasite affecting both human and animal health, identifying infected meat as a significant source of human infections particularly in Europe.
  • The research utilized a systematic review of 226 publications and applied a Bayesian hierarchical model to estimate regional seroprevalence in various animal species, showing significant variation based on species, regions, and rearing conditions.
  • Findings revealed that seroprevalence was highest in Eastern Europe and lowest in Northern Europe, with outdoor-kept sheep showing the highest infection rate, emphasizing the need for better data and source attribution to address human infection risks.
View Article and Find Full Text PDF

Background: To offer an alternative to conventional techniques of lateral prosthetic anastomosis on arteries which require a long training, and impose an extensive open surgery, we are proposing the clampless 2 device (C2D) implanted by a simple arterial puncture and allows a lateral implantation of a polytetrafluoroethylene (PTFE) vascular graft in an artery, without arterial clamping or suture.

Methods: C2D is a "T" shaped 25-mm long and 8-mm diameter Nitinol stent with a 6-mm PTFE graft prosthesis mounted laterally on the stent, and implanted in an artery, via a 21-French sheath, and a compliant balloon inflation. In vitro testing of the C2D was first performed on a bench including a segment of a 7-mm internal diameter pig abdominal aorta.

View Article and Find Full Text PDF

In the Netherlands, the avian influenza outbreak in poultry in 2003 and the Q fever outbreak in dairy goats between 2007 and 2010 had severe consequences for public health. These outbreaks led to the establishment of an integrated human-veterinary risk analysis system for zoonoses, the Zoonoses Structure. The aim of the Zoonoses Structure is to signal, assess and control emerging zoonoses that may pose a risk to animal and/or human health in an integrated One Health approach.

View Article and Find Full Text PDF
Article Synopsis
  • Infants exposed to anti-tumour necrosis factor-α (TNF) medications during pregnancy require postponement of live-attenuated vaccinations until the drug is cleared from their system, but the exact clearance time is not well understood.
  • A study followed 107 infants whose mothers were treated with infliximab or adalimumab, finding that 23% still had detectable anti-TNF levels at six months, with some clearing by 12 months.
  • A pharmacokinetic model was developed to predict anti-TNF clearance, along with an online calculator to help clinicians determine when infants can safely receive live-attenuated vaccinations based on their anti-TNF levels.
View Article and Find Full Text PDF

Background: The parasite Toxoplasma gondii (T. gondii) causes a substantial human disease burden worldwide. Ingesting improperly cooked pork containing T.

View Article and Find Full Text PDF

Successful repopulation programs of Eurasian beavers (Castor fiber) have resulted in an increase in beaver populations throughout Europe. This may be of public health relevance because beavers can host multiple zoonotic pathogens. From March 2018 to March 2020, opportunistic testing of dead beavers was performed for hepatitis E virus, orthohantavirus, Anaplasma phagocytophilum, Bartonella spp.

View Article and Find Full Text PDF
Article Synopsis
  • Toxoplasma gondii is a significant foodborne pathogen impacting human health, prompting the EFSA to recommend serological testing and audits on pig farms to lower infection risks.
  • A study conducted on five Dutch finishing pig farms implemented custom intervention strategies (like neutering cats and controlling rodents) and found a notable reduction in T. gondii seroprevalence after one year, particularly with cat neutering and covering feed storage.
  • The research highlights the effectiveness of targeted interventions in reducing T. gondii risks on farms, providing valuable insights for policymakers and farmers in enhancing food safety practices.
View Article and Find Full Text PDF

Parasites often have complex developmental cycles that account for their presence in a variety of difficult-to-analyze matrices, including feces, water, soil, and food. Detection of parasites in these matrices still involves laborious methods. Untargeted sequencing of nucleic acids extracted from those matrices in metagenomic projects may represent an attractive alternative method for unbiased detection of these pathogens.

View Article and Find Full Text PDF

The geographic range of the zoonotic raccoon roundworm (Baylisascaris procyonis) is expanding together with the range of its host, the raccoon (Procyon lotor). This creates a new public health risk in parts of Europe where this parasite was previously absent. In the Netherlands, a raccoon population is becoming established and incidental findings of B.

View Article and Find Full Text PDF
Article Synopsis
  • Salmonella Infantis is becoming more common in broilers and in human cases, with a mega-plasmid (pESI) associated with its virulence and antibiotic resistance.
  • In a study of 379 broiler flocks in the Netherlands, 3.7% of flocks tested positive for S. Infantis, with most isolates carrying the pESI-like mega-plasmid, showing genetic diversity even within the same farm.
  • Factors like poor litter quality and certain feed additives increased S. Infantis prevalence, while practices like vaccination and external cleaning appeared protective, highlighting the need for ongoing monitoring and control strategies.
View Article and Find Full Text PDF

Background: There is an underuse of genetic testing in breast cancer patients with a lower level of education, limited health literacy or a migrant background. We aimed to study the effect of a health literacy training program for surgical oncologists and specialized nurses on disparities in referral to genetic testing.

Methods: We conducted a multicenter study in a quasi-experimental pre-post (intervention) design.

View Article and Find Full Text PDF

The effect of pregnaSSncy on the course of inflammatory bowel disease (IBD) remains controversial. We aimed to describe the disease course before and after a first pregnancy in IBD patients. We analyzed data from a prospectively followed-up pregnancy cohort (minimal follow-up of 7 years), with clinical, biochemical and endoscopic characteristics obtained pre-pregnancy, during pregnancy and post-pregnancy.

View Article and Find Full Text PDF

The cestode Echinococcus multilocularis is the causative agent of alveolar echinococcosis, a severe helminthic zoonotic disease distributed in the Northern Hemisphere. The lifecycle of the parasite is mainly sylvatic, involving canid and rodent hosts. The absence of genetic data from most eastern European countries is a major knowledge gap, affecting the study of associations with parasite populations in Western Europe.

View Article and Find Full Text PDF

Background: Trichinellosis is caused by consumption of raw or undercooked meat containing infective Trichinella muscle larvae (ML). Only few studies on heat-inactivation of Trichinella ML are available in literature and more validated data concerning heat inactivation is needed to improve the risk estimation.

Objective And Methods: The aim of the present study was to evaluate the two in vitro methods "staining" and "morphological examination" as proxies for Trichinella ML heat inactivation in comparison with the mouse bioassay method to get more insight in the relationship between heat, heating time and inactivation of Trichinella ML.

View Article and Find Full Text PDF

In 2012, WHO/FAO ranked 24 foodborne parasites (FBP) using multicriteria decision analysis (MCDA) to provide risk assessors with a basis for prioritising control of highly ranked FBP on the global level. One conclusion was that ranking may differ substantially per region. In Europe, the same methodology was used to rank FBP of relevance for Europe.

View Article and Find Full Text PDF