Publications

occurrence of plesiomonas shigelloides in surface water: relationship with faecal pollution and trophic state.	plesiomonas shigelloides is an autochthonous inhabitant of freshwater and has been associated with several waterborne outbreaks of acute gastro-enteritis. one of these outbreaks occurred in the summer of 1990, at a recreational beach near amsterdam. in the summer of 1991, a survey was conducted to examine the presence of p. shigelloides in recreational fresh waters and marine water in the netherlands. during the survey became clear that the specificity of current methods for the isolation and en ...	1993	8397688
types of bacteria found in the canals of amsterdam.	the bacteriological quality of the canal system in amsterdam was assessed by determination of the quantity and quality of the water. eight samples of water from different canals were studied. no gram-positive bacteria were found. the number of gram-negative bacteria varied from 720-1,820 (average 1,250) organisms per ml of water. the predominant bacteria were: pseudomonas sp., klebsiella pneumoniae and escherichia coli. these data illustrate the high number of potential pathogens in the water ca ...	1993	8441356
monitoring of waterborne pathogens in surface waters in amsterdam, the netherlands, and the potential health risk associated with exposure to cryptosporidium and giardia in these waters.	the water in the canals and some recreational lakes in amsterdam is microbiologically contaminated through the discharge of raw sewage from houseboats, sewage effluent, and dog and bird feces. exposure to these waters may have negative health effects. during two successive 1-year study periods, the water quality in two canals (2003 to 2004) and five recreational lakes (2004 to 2005) in amsterdam was tested with regard to the presence of fecal indicators and waterborne pathogens. according to bat ...	2008	18281429
compliance with boil water advice following a water contamination incident in the netherlands in 2007.	in may 2007, escherichia coli was detected in tap water supplied by a company in north holland. the company issued advice through mass media to boil tap water before consumption; this advice was lifted six days later. a cross-sectional study was implemented to investigate compliance among residents in this area. based on postcode, a total of 300 households, chosen randomly from a database of a private company performing internet-based surveys for different marketing purposes, were sent a self-ad ...	2009	19341604
portrait of a leading vaccinologist: dedicated to meningitis and respiratory tract infections.	since the early days of jenner, vaccination against infectious agents appeared a very efficacious way for preventing millions of deaths and patients with serious sequelae. however, only limited success has been obtained in eradicating infectious diseases. smallpox is the only human infectious disease that has been eradicated so far by vaccination, and eradication of polio is in its endgame. data from the who in 2003 show that 2.5 million children under five still die from vaccine preventable dis ...	2009	19855175