| molecular epidemiology of shigella sonnei in pima county, arizona: evidence for a mexico-related plasmid. | in 1984, the incidence of shigellosis was 32.4 per 100,000 population in pima county, arizona. to investigate sources, shigella isolates and epidemiologic data were collected for 79 cases of infection with shigella sonnei, the most common species. since s. sonnei has a single serotype, plasmid isolation was attempted to refine the epidemiologic analysis. there were seven plasmid patterns containing 17, 13, 4, 22, 9, 2, and 3 isolates. twelve of 17 isolates associated with recent travel to mexico ... | 1990 | 2181036 |
| current status of immunofluorescence techniques for rapid detection of shigellae in fecal specimens. | polyvalent shigella conjugates were prepared for shigella groups a, b, c, and d. after preliminary testing with pure cultures of both homologous and heterologous organisms, these reagents were used in three evaluation studies. fecal specimens from patients hospitalized with diarrhea, from children involved in an institutional outbreak of dysentery due to s. sonnei, and from patients with diarrhea in arizona were screened by fluorescent-antibody (fa) tests and were cultured. specimens were examin ... | 1965 | 14339269 |
| molecular epidemiology of shigella infections: plasmid profiles, serotype correlation, and restriction endonuclease analysis. | plasmid isolation was used to refine the epidemiologic analysis for 168 shigellosis cases in pima county, ariz. plasmids of less than 20 kb were used for comparison of plasmid profiles. plasmid patterns for each species were distinct. a total of 57 of 74 (77%) shigella flexneri strains could be placed into seven plasmid patterns, 70 of 79 (89%) shigella sonnei strains could be placed into seven patterns, 12 shigella boydii strains could be placed into six patterns, and each of 3 shigella dysente ... | 1991 | 1847148 |
| an outbreak of shigella sonnei gastroenteritis on colorado river raft trips. | | 1974 | 4411988 |
| the epidemiology of s. sonnei and s. flexneri in pima county, arizona: an exploratory study. | investigation of 189 cases of shigellosis reported to the pima county, arizona health department in 1986 revealed that 23 per cent of cases could be attributed to travel to mexico, and 10 per cent to day care attendees and their household contacts. no source of infection or high-risk activity could be demonstrated for 43 per cent of the cases. households in which s. flexneri occurred were more likely to be characterized by crowded living situations and to have no known source of infection. | 1988 | 3044149 |