Demographic data on Salmonella enteritidis infection in Thailand, 1990-1995.

The data for the comprehensive analysis of Salmonella enteritidis infection was based on the information recorded in the request form submitted for Salmonella typing and the results of serotyping at the WHO National Salmonella and Shigella Center, Department of Medical Sciences, Ministry of Public Health, Thailand during 1990-1995. Fifty-one cases of S. enteritidis (SE) infection were confirmed in 1990. The morbidity being markedly increased each year from 1991 to 1995, with 105, 307, 471, 659 and 877 cases being identified, respectively. Among the isolates of Salmonella spp, SE was the most common serotype during 1993-1995. The cases were mostly predominant in Bangkok and then in southern, northeastern, central and northern regions, respectively. The morbidity rates per 100,000 population per year of SE infection in 1990-1995 were 0.09, 0.18, 0.53, 0.8, 1.11 and 1.47, respectively. Analysis of the infection rate by sex and age demonstrated that the incidence in males was higher than in females. Adult patients were more frequently found than adolescent patients. The organism was found in feces, blood, pus, urine, cerebrospinal fluid and sputum, accounting for 41.7, 35.8, 5.5, 2.5, 1.7 and 0.4%, respectively. The average extraintestinal isolation index was 0.52.