Changing epidemiology of human salmonellosis in Hong Kong, 1982-93.
A comprehensive analysis of the epidemiology of salmonellosis in a major hospital in Hong Kong from 1982-93 is reported. The trend of salmonella isolations over the past 12 years and changes in the occurrence of individual serotypes are delineated. A total of 5328 isolates were analyzed. Groups B (Salmonella typhimurium and S. derby) and E (S. anatum) were the commonest serogroups isolated from the intestinal tract in all age groups. A significant increase in the isolation of group D salmonellae has been observed since 1989. This is accounted for by a substantial rise in S. enteritidis isolation as seen in Western countries, despite a concomitant decrease of S. typhi. The extraintestinal isolation index (EII) is proposed as an index of the virulence potential of individual serotypes and serogroups. Group D salmonella was found to be the most invasive serogroup. While group D was the predominant serogroup isolated from extraintestinal sites in patients older than 1 year, group B serotypes (especially S. typhimurium) were more frequently seen in infants younger than 12 months.
Wong
S S
SS
Department of Microbiology, University of Hong Kong, Queen Mary Hospital.
Yuen
K Y
KY
Yam
W C
WC
Lee
T Y
TY
Chau
P Y
PY
D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D016470:Bacteremia / Q000382:microbiology; D002648:Child; D002675:Child, Preschool; D005260:Female; D006723:Hong Kong / Q000453:epidemiology; D006801:Humans; D015994:Incidence; D007223:Infant; D007231:Infant, Newborn; D007422:Intestines / Q000382:microbiology; D008297:Male; D008875:Middle Aged; D012475:Salmonella / Q000145:classification / Q000302:isolation & purification*; D012480:Salmonella Infections / Q000453:epidemiology* / Q000382:microbiology; D012477:Salmonella enteritidis / Q000302:isolation & purification; D012485:Salmonella typhi / Q000302:isolation & purification; D012486:Salmonella typhimurium / Q000302:isolation & purification; D012621:Seasons; D012703:Serotyping