[Bacteriological and virological studies on the cause of sporadic acute gastroenteritis in Tama, Tokyo (1991-1996)].
Between May 1991 and December 1996, bacteriological and virological investigations on the fecal samples from patient of infantile diarrhea (155 cases), or infectious gastroenteritis (1,409 cases) diagnosed with 9 medical institutions in Tama of Tokyo were carried out. Of 1,564 samples, 722 (46.2%) were enteropathogen positive cases, and mixed infection was also observed in about 15% of the positive cases. Among 13 different kinds of enteropathogens identified, the most prevalent one was pathogenic E. coli (20.7%), followed by Campylobacter spp. (10.0%), Rotavirus (8.8%), Salmonella spp. (3.9%), Adenovirus (1.9%), ECHO virus (0.9%), Vibrio parahaemolyticus (0.8%), Poliovirus (0.7%), Aeromonas spp. and Coxsackie B virus (both 0.6%). Furthermore, SRSV was confirmed in 82 out of 619 patients (13.2%) for 2 years (1995 and 1996). In addition, Shigella sonnei (3 cases), S. Paratyphi-A (1 case) and enterohemorrhagic E. coli O157: H7 (2 cases) were also detected. A higher detection ratio was recorded in February, August and November, reflecting respectively by month a highly frequency of Rotavirus, enteric bacteria causing food poisoning and SRSV. With reference to the isolates, the most of pathogenic E. coli belonged to enteropathogenic serotype E. coli (EPEC), and S. Enteritidis was most prevalent serotype.
Tama Branch Laboratory, Tokyo Metropolitan Research Laboratory of Public Health.
I
I
Yoshida
Y
Y
Hayashi
K
K
Katayama
S
S
Yamada
D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D002167:Campylobacter / Q000302:isolation & purification; D002648:Child; D002675:Child, Preschool; D003968:Diarrhea, Infantile / Q000453:epidemiology / Q000382:microbiology* / Q000821:virology*; D004926:Escherichia coli / Q000302:isolation & purification; D005759:Gastroenteritis / Q000453:epidemiology / Q000382:microbiology* / Q000821:virology*; D006801:Humans; D007223:Infant; D012401:Rotavirus / Q000302:isolation & purification; D014041:Tokyo / Q000453:epidemiology