Lucy J Robertson

Summary

Affiliation: Norwegian School of Veterinary Science
Country: Norway

Publications

  1. pmc Effect of sample holding time on recovery of Cryptosporidium oocysts and Giardia cysts from water samples
    L J Robertson
    Seksjon for Parasittologi, Institutt for Farmakologi, Mikrobiologi og Naeringsmiddelhygiene, Norges Veterinaerhogskole, 0033 Oslo, Norway
    Appl Environ Microbiol 66:1724-5. 2000
  2. ncbi request reprint Microbiological analysis of seed sprouts in Norway
    Lucy J Robertson
    Department of Pharmacology, Microbiology and Food Hygiene, The Norwegian School of Veterinary Science, Oslo
    Int J Food Microbiol 75:119-26. 2002
  3. pmc Investigation of Swedish cases reveals an outbreak of cryptosporidiosis at a Norwegian hotel with possible links to in-house water systems
    Agnes Hajdu
    Department of Infectious Disease Epidemiology, Norwegian Institute of Public Health, Oslo, Norway
    BMC Infect Dis 8:152. 2008
  4. ncbi request reprint Fate of Cryptosporidium oocysts and Giardia cysts in the Norwegian aquatic environment over winter
    L J Robertson
    Parasitology Laboratory, Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, PO Box 8146 Dep, 0033 Oslo, Norway
    Microb Ecol 52:597-602. 2006
  5. ncbi request reprint Molecular characterisation of Giardia isolates from clinical infections following a waterborne outbreak
    L J Robertson
    Parasitology Laboratory, Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, 0033 Oslo, Norway
    J Infect 55:79-88. 2007
  6. ncbi request reprint Cryptosporidium oocysts: challenging adversaries?
    Lucy J Robertson
    Parasitology Laboratory, Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, PO Box 8146 Dep, 0033 Oslo, Norway
    Trends Parasitol 23:344-7. 2007
  7. ncbi request reprint Demographics of Giardia infections in Bergen, Norway, subsequent to a waterborne outbreak
    Lucy J Robertson
    Parasitology Laboratory, Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, Oslo
    Scand J Infect Dis 40:189-92. 2008
  8. ncbi request reprint The potential for marine bivalve shellfish to act as transmission vehicles for outbreaks of protozoan infections in humans: a review
    L J Robertson
    Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, 0033 Oslo, Norway
    Int J Food Microbiol 120:201-16. 2007
  9. ncbi request reprint Giardia cysts in sewage influent in Bergen, Norway 15-23 months after an extensive waterborne outbreak of giardiasis
    L J Robertson
    Parasitology Laboratory, Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, Oslo, Norway
    J Appl Microbiol 104:1147-52. 2008
  10. ncbi request reprint Giardia duodenalis cysts isolated from wild moose and reindeer in Norway: genetic characterization by PCR-rflp and sequence analysis at two genes
    L J Robertson
    Parasitology Laboratory, Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, 0033 Oslo, Norway
    J Wildl Dis 43:576-85. 2007

Collaborators

Detail Information

Publications33

  1. pmc Effect of sample holding time on recovery of Cryptosporidium oocysts and Giardia cysts from water samples
    L J Robertson
    Seksjon for Parasittologi, Institutt for Farmakologi, Mikrobiologi og Naeringsmiddelhygiene, Norges Veterinaerhogskole, 0033 Oslo, Norway
    Appl Environ Microbiol 66:1724-5. 2000
    ..A spiking experiment indicated that holding times of up to 2 weeks had no significant effect on recovery of these parasites from 10-liter samples of raw water in plastic carboys...
  2. ncbi request reprint Microbiological analysis of seed sprouts in Norway
    Lucy J Robertson
    Department of Pharmacology, Microbiology and Food Hygiene, The Norwegian School of Veterinary Science, Oslo
    Int J Food Microbiol 75:119-26. 2002
    ..Whilst our results support spent irrigation water as the most suitable matrix for testing for bacteria, unsprouted seed is considered the more useful matrix for analysing for parasite contaminants...
  3. pmc Investigation of Swedish cases reveals an outbreak of cryptosporidiosis at a Norwegian hotel with possible links to in-house water systems
    Agnes Hajdu
    Department of Infectious Disease Epidemiology, Norwegian Institute of Public Health, Oslo, Norway
    BMC Infect Dis 8:152. 2008
    ..In Norway, cryptosporidiosis is not reportable, and human infections are rarely diagnosed...
  4. ncbi request reprint Fate of Cryptosporidium oocysts and Giardia cysts in the Norwegian aquatic environment over winter
    L J Robertson
    Parasitology Laboratory, Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, PO Box 8146 Dep, 0033 Oslo, Norway
    Microb Ecol 52:597-602. 2006
    ..These results suggest that infection with these parasites in Norway is not usually from transmission stages that have over-wintered in the Norwegian environment...
  5. ncbi request reprint Molecular characterisation of Giardia isolates from clinical infections following a waterborne outbreak
    L J Robertson
    Parasitology Laboratory, Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, 0033 Oslo, Norway
    J Infect 55:79-88. 2007
    ..Characterisation of further isolates from patients diagnosed in the subsequent months was conducted to determine whether isolates with particular sequences might predominate, or whether the sequence variation would continue...
  6. ncbi request reprint Cryptosporidium oocysts: challenging adversaries?
    Lucy J Robertson
    Parasitology Laboratory, Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, PO Box 8146 Dep, 0033 Oslo, Norway
    Trends Parasitol 23:344-7. 2007
    ..Why is this tough transmission stage so troublesome now? And are future environments likely to assist or hinder its apparent ubiquity? Here, we explore further the fascination and challenge engendered by this parasite transmission stage...
  7. ncbi request reprint Demographics of Giardia infections in Bergen, Norway, subsequent to a waterborne outbreak
    Lucy J Robertson
    Parasitology Laboratory, Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, Oslo
    Scand J Infect Dis 40:189-92. 2008
    ..Here, the demographics of those subsequently infected are described, and young women again predominate. As secondary cases were not waterborne, this cannot be attributed to drinking habits...
  8. ncbi request reprint The potential for marine bivalve shellfish to act as transmission vehicles for outbreaks of protozoan infections in humans: a review
    L J Robertson
    Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, 0033 Oslo, Norway
    Int J Food Microbiol 120:201-16. 2007
    ....
  9. ncbi request reprint Giardia cysts in sewage influent in Bergen, Norway 15-23 months after an extensive waterborne outbreak of giardiasis
    L J Robertson
    Parasitology Laboratory, Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, Oslo, Norway
    J Appl Microbiol 104:1147-52. 2008
    ..Over 1 year later, the concentrations and genotypes of Giardia cysts occurring in sewage influent were studied to investigate the impact of the outbreak event on Giardia infections in the community...
  10. ncbi request reprint Giardia duodenalis cysts isolated from wild moose and reindeer in Norway: genetic characterization by PCR-rflp and sequence analysis at two genes
    L J Robertson
    Parasitology Laboratory, Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, 0033 Oslo, Norway
    J Wildl Dis 43:576-85. 2007
    ..duodenalis infection in Norway, which may be of importance to veterinary and public health...
  11. ncbi request reprint Development and use of a pepsin digestion method for analysis of shellfish for Cryptosporidium oocysts and Giardia cysts
    L J Robertson
    Parasitology Laboratory, Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, 0033 Oslo, Norway
    J Food Prot 71:959-66. 2008
    ..A more comprehensive study of the occurrence of these parasites in shellfish would be of pertinence to the Norwegian shellfish industry...
  12. doi request reprint A water contamination incident in Oslo, Norway during October 2007; a basis for discussion of boil-water notices and the potential for post-treatment contamination of drinking water supplies
    Lucy Robertson
    Parasitology Laboratory, Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, Postbox 8146 Dep, 0033, Oslo, Norway
    J Water Health 7:55-66. 2009
    ....
  13. doi request reprint Giardia and Cryptosporidium infections in sheep and goats: a review of the potential for transmission to humans via environmental contamination
    L J Robertson
    Parasitology Laboratory, Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, Oslo, Norway
    Epidemiol Infect 137:913-21. 2009
    ..If water contamination from a particular population of sheep/goats is suspected, then suitable investigations should be instigated, investigating both prevalence and species/genotype, before precautionary measures are imposed...
  14. ncbi request reprint A small outbreak of human cryptosporidiosis associated with calves at a dairy farm in Norway
    Lucy Robertson
    Parasitology Laboratory, Department of Food Safety and Infection Biology, Oslo, Norway
    Scand J Infect Dis 38:810-3. 2006
    ..Sequencing studies were performed. Although 4 of the people acquired their infections from the calves, the other probably became infected from other calves or contaminated pens...
  15. pmc Occurrence of Cryptosporidium oocysts and Giardia cysts in sewage in Norway
    L J Robertson
    Parasitology Laboratory, Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, 0033 Oslo, Norway
    Appl Environ Microbiol 72:5297-303. 2006
    ..Many STW in Norway have minimal treatment and discharge effluent into rivers and lakes, thus, risk of contamination of water courses by Cryptosporidium and Giardia is considerable...
  16. ncbi request reprint Isolation and enumeration of Giardia cysts, cryptosporidium oocysts, and Ascaris eggs from fruits and vegetables
    L J Robertson
    Department of Pharmacology, Microbiology and Food Hygiene, The Norwegian School of Veterinary Science, Oslo
    J Food Prot 63:775-8. 2000
    ..It is therefore recommended that fruit and vegetables should be as fresh as possible when analyzed for parasites...
  17. ncbi request reprint Isolation of Cyclospora oocysts from fruits and vegetables using lectin-coated paramagnetic beads
    L J Robertson
    Department of Pharmacology, Microbiology and Food Hygiene, The Norwegian School of Veterinary Science, Oslo
    J Food Prot 63:1410-4. 2000
    ..A considerably smaller, cleaner final volume remained for microscopy, which increases the sensitivity of the technique and reduces operator time...
  18. ncbi request reprint Occurrence of Cryptosporidium oocysts and Giardia cysts in raw waters in Norway
    L J Robertson
    Department of Pharmacology, Microbiology and Food Hygiene, The Norwegian School of Veterinary Science, Oslo
    Scand J Public Health 29:200-7. 2001
    ..This paper reports the first investigation into the occurrence of Cryptosporidium and Giardia in Norwegian raw water sources...
  19. ncbi request reprint Occurrence of parasites on fruits and vegetables in Norway
    L J Robertson
    Department of Pharmacology, Microbiology and Food Hygiene, The Norwegian School of Veterinary Science, Oslo
    J Food Prot 64:1793-8. 2001
    ..wealthy country, without there being an outbreak situation. These findings may have important implications for global food safety...
  20. ncbi request reprint Factors affecting recovery efficiency in isolation of Cryptosporidium oocysts and Giardia cysts from vegetables for standard method development
    L J Robertson
    Department of Pharmacology, Microbiology and Food Hygiene, The Norwegian School of Veterinary Science, Oslo
    J Food Prot 64:1799-805. 2001
    ..However, merely increasing magnetic strength of the capturing magnet does not affect recovery efficiency, which must be reliant on a superior bead system, buffering system, or both...
  21. ncbi request reprint Effects of the Norwegian winter environment on Giardia cysts and Cryptosporidium oocysts
    L J Robertson
    Section of Parasitology, Department of Pharmacology, Microbiology and Food Hygiene, The Norwegian School of Veterinary Science, 0033 Oslo, Norway
    Microb Ecol 47:359-65. 2004
    ..Differences in the morphological characteristics, matrix effects, and the possible relationship of the dye data to parasite survival are discussed in relation to further studies...
  22. ncbi request reprint The potential for acquiring cryptosporidiosis or giardiosis from consumption of mung bean sprouts in Norway: a preliminary step-wise risk assessment
    L J Robertson
    Parasitology Laboratory, Section of Microbiology, Immunology and Parasitology, Department of Food Safety and Infection Biology, The Norwegian School of Veterinary Science, PO boks 8146 Dep, N 0033 Oslo, Norway
    Int J Food Microbiol 98:291-300. 2005
    ..Not only does the risk assessment identify new areas of research, but it also demonstrates how risk assessment can be used as a tool to try to influence public health surveillance...
  23. pmc Application of genotyping during an extensive outbreak of waterborne giardiasis in Bergen, Norway, during autumn and winter 2004
    L J Robertson
    Parasitology Laboratory, Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, PO Box 8146 Dep, 0033 Oslo, Norway
    Appl Environ Microbiol 72:2212-7. 2006
    ..Grouping the isolates on the basis of SNPs resulted in different groups for the two genes. The results are discussed in relation to giardiasis in Norway and to other Giardia genotyping studies...
  24. pmc Cryptosporidium parvum infections in Bergen, Norway, during an extensive outbreak of waterborne giardiasis in autumn and winter 2004
    L J Robertson
    Parasitology Laboratory, Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, PO Box 8146 Dep, 0033 Oslo, Norway
    Appl Environ Microbiol 72:2218-20. 2006
    ..Whether these infections were due to a simultaneous outbreak of waterborne cryptosporidiosis or reflected background levels not normally detected is discussed...
  25. doi request reprint The zoonotic potential of Giardia and Cryptosporidium in Norwegian sheep: a longitudinal investigation of 6 flocks of lambs
    L J Robertson
    Parasitology Laboratory, Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, Postbox 8146 Dep, 0033 Oslo, Norway
    Vet Parasitol 171:140-5. 2010
    ..xiaoi (non-zoonotic). These results suggest that sheep in Norway are unlikely to be an important reservoir of zoonotic Giardia in Norway, but might have some public health significance with respect to Cryptosporidium...
  26. ncbi request reprint Occurrence of Giardia and Cryptosporidium in Norwegian red foxes (Vulpes vulpes)
    Inger S Hamnes
    Norwegian School of Veterinary Sciences, Department of Food Safety and Infection Biology, Section of Microbiology, Immunology and Parasitology, P O Box 8146 Dep, N 0033 Oslo, Norway
    Vet Parasitol 143:347-53. 2007
    ....
  27. pmc A longitudinal study on the occurrence of Cryptosporidium and Giardia in dogs during their first year of life
    Inger S Hamnes
    Norwegian School of Veterinary Science, Department of Food Safety and Infection Biology, Section of Microbiology, Immunology and Parasitology, P O Box 8146 Dep, N 0033 Oslo, Norway
    Acta Vet Scand 49:22. 2007
    ..In addition, pooled samples were collected from 43 of the litters, and from 42 of the mother bitches, when the puppies were approximately 1 and/or 2 months old...
  28. doi request reprint Analysis of cured meat products for cryptosporidium oocysts following possible contamination during an extensive waterborne outbreak of Cryptosporidiosis
    Lucy J Robertson
    Parasitology Laboratory, Section for Microbiology, Immunology, and Parasitology, Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, P O Box 8146 Dep, 0033 Oslo, Norway
    J Food Prot 75:982-8. 2012
    ....
  29. ncbi request reprint Removal of parasitic protozoa from water using a mobile water filtration apparatus intended for field use by military or emergency personnel
    Lucy J Robertson
    Section of Parasitology, Department of Pharmacology, Microbiology and Food Hygiene, The Norwegian School of Veterinary Science, P O Box 8146 Dep, 0033 Oslo, Norway
    Mil Med 168:53-6. 2003
    ..9% (1.76-3.14 log removal) for Cryptosporidium. The Berkefeld filter TWA 3 complies with published recommendations for municipal water supply for removal of Giardia but does not always comply with such regulations for Cryptosporidium...
  30. doi request reprint Giardiasis--why do the symptoms sometimes never stop?
    Lucy J Robertson
    Parasitology Laboratory, Institute of Food Safety and Infection Biology, Norwegian School of Veterinary Science, Oslo, Norway
    Trends Parasitol 26:75-82. 2010
    ..We also raise further questions, looking for clues as to why giardiasis sometimes becomes an intrusive, long-term problem...
  31. doi request reprint Foodborne cryptosporidiosis: is there really more in Nordic countries?
    Lucy J Robertson
    Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, Oslo, Norway
    Trends Parasitol 29:3-9. 2013
    ..Although the risk of foodborne cryptosporidiosis is probably underestimated globally, we suggest that the next outbreak is no more likely to be in a Nordic country than anywhere else...
  32. doi request reprint Preliminary experiments on use of zebrafish as a laboratory model for Giardia duodenalis infection
    Kristoffer R Tysnes
    Parasitology Laboratory, Section of Microbiology, Immunology and Parasitology, Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, Oslo, Norway
    Acta Parasitol 57:1-6. 2012
    ..Although a single trophozoite was observed in one fish three days post-exposure, we were unable to demonstrate established, propagative infection under the conditions tested...
  33. ncbi request reprint Impacts of globalisation on foodborne parasites
    Lucy J Robertson
    Parasitology Laboratory, Section for Microbiology, Immunology, and Parasitology, Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, PO Box 8146 Dep, 0033 Oslo, Norway Electronic address
    Trends Parasitol 30:37-52. 2014
    ..It will facilitate sharing of methods and approaches, and establishment of systems and databases that enable control of parasites entering the global food chain...