| external quality assessment for clinical microbiological laboratories in norway 1983. | the external quality assessment scheme for clinical microbiology (eqa-m) used in norway in 1983 is described and the results are evaluated. altogether three distributions, each consisting of 3--4 simulated clinical specimens, were carried out. all specimens were distributed as "open" tests (identifiable by the participants as eqa-m tests), but two were also simultaneously distributed as "blind" tests (not identifiable by the participants as eqa-m tests). the eqa-m in 1983 has revealed some probl ... | 1984 | 6493581 |
| outbreak of shigella sonnei infection traced to imported iceberg lettuce. | in the period from may through june 1994, an increase in the number of domestic cases of shigella sonnei infection was detected in several european countries, including norway, sweden, and the united kingdom. in all three countries epidemiological evidence incriminated imported iceberg lettuce of spanish origin as the vehicle of transmission. the outbreaks shared a number of common features: a predominance of adults among the case patients, the presence of double infections with other enteropath ... | 1995 | 7751364 |
| [evaluation of the national notification system for infectious diseases during an outbreak of shigella epidemic in norway 1994]. | the national notification system for infectious diseases, in norwegian abbreviated to msis, registered 110 cases of shigella sonnei-infection in persons with debut of symptoms during weeks 21 to 25, 1994, and where we did not receive information that the patients had been abroad. we evaluated the notification system during this outbreak of infectious disease by looking at delays in the notification process and estimating the proportion of patients who received an etiological diagnosis. it took a ... | 1995 | 7770827 |
| study of polymorphic variable-number of tandem repeats loci in the ecor collection and in a set of pathogenic escherichia coli and shigella isolates for use in a genotyping assay. | the escherichia coli (e. coli) reference collection, ecor, consists of 72 strains that are representative of the genotypic diversity, as indexed by multilocus enzyme electrophoresis (mlee), in the species as a whole. mlee revealed 4 main phylogenetic groups designated a, b1, b2 and d. we present a study of the relationship between the ecor strains as determined by polymorphisms in seven variable-number of tandem repeats (vntr) loci. seven tandem repeats that were present in more than one of the ... | 2007 | 17291612 |