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  • Title: [Bacteriological study of traveller's diarrhoea. 4) Isolation of enteropathogenic bacteria from patients with traveller's diarrhoea at Osaka Airport Quarantine Station during 1984-1991].
    Author: Yoshida A, Noda K, Omura K, Miyagi K, Mori H, Suzuki N, Takai S, Matsumoto Y, Hayashi K, Miyata Y.
    Journal: Kansenshogaku Zasshi; 1992 Oct; 66(10):1422-35. PubMed ID: 1293222.
    Abstract:
    During the last 8 years (1984 to 1991), 16,639,233 overseas travellers were quarantined at Osaka Airport Quarantine Station and 38,326 travellers reported that they were (or had been) suffering from diarrhoea. Bacteriological examination of stools from 12,573 persons revealed the following results. 1) Various enteropathogenic bacteria were isolated from 3,669 cases (29.2%) examined. The predominant species of bacteria isolated were as follows: Salmonella, 1049 cases; Plesiomonas shigelloides, 1030 cases; Vibrio parahaemolyticus, 789 cases; Shigella, 607 cases; enterotoxigenic Escherichia coli, 422 cases; Vibrio cholerae non-O1, 212 cases. 2) There were no apparent seasonal variations in the isolation rate of these pathogens. 3) The suspected regions for infection with these pathogens were as follows: a) Salmonella, Enterotoxigenic E. coli and Plesiomonas, mainly South-East and South-West Asia. b) Shigella, South-West Asia, especially India (59.8%). c) V. parahaemolyticus and V. fluvialis, mainly South-East and East Asia. d) V. cholerae non-O1, V. mimicus, almost restricted to Asia, mainly South-East Asia. 4) 22 strains of V. cholerae O1 were isolated and 19 were Ogawa, E1 Tor. Of these strains, 13 were cholera toxin-producing strains and 9 were non-toxigenic strains. 5) Several pathogens (mixed infection) were isolated simultaneously from 670 cases. 6) The 1247 Salmonella strains were identified into 98 serovars. 7) Of 624 Shigella strains isolated, 57.9% were S. sonnei, 29.2% were S. flexneri, 8.6% were S. boydii, 4.3% were S. dysenteriae. 8) The most predominant serovar of V. parahaemolyticus was O4:K8. Of 1,247 strains isolated, 9.8% were not producing thermostable direct hemolysin (TDH). 9) 570 (91.3%) of 624 Shigella strains and 409 (32.8%) of 1,247 Salmonella strains isolated were resistant to any one of the drugs tested (SM. CP. TC. KM. ABPC. NA. OFLX). The resistance rate and the number of multiple drug-resistance strains increased year by year. 10) Enterotoxigenic E. coli was isolated from 422 cases (10.7%) of 3,939 cases. Cases with enterotoxigenic E. coli strains producing ST (heat-stable), LT (heat-labile) or both ST and LT were 53.8%, 24.2% and 14.2% respectively. The others were cases with mixed types of enterotoxin production.
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