I. General Situation of the Epidemics
During the 31st week of the year 2009, from 0 o'clock of Aug.3 to 24 o'clock of Aug. 9, across the 18 districts and counties of Beijing, 4175 cases of 19 legal infectious diseases were reported, among which four died (namely two cases of tuberculosis, one case of hepatitis B and one case of AIDS).Among them, 13 categories of Type B Infectious Diseases amounting to 1610 cases were reported, 1.47% lower than last week and 15.91% higher than the same week last year. The top 5 categories of diseases with the highest incidence rates were as follows: dysentery, tuberculosis, hepatitis B, syphilis and A H1N1 Influenza. Six categories of Type C Infectious Diseases amounting to 2565 cases were reported, which was 0.27% higher than last week and 21.05% higher than the same week last year.

II. Focus of the Epidemic

(1) A H1N1 Influenza
A total of 81 cases of A H1N1 Influenza cases were reported in this week, 18.18% lower than last week.
As of the 31st week, the city has reported 598 cases of A H1N1 Influenza. Of these, 204 are foreign personnel, accounting for 34.11% of the total number of reported cases; 578 are people aged between 6 to 54, accounting for 96.66% of the total number of reported cases; no death case was reported.

(2) Dysentery
The city has reported 1012 cases of dysentery, 2.33% higher than last week, 22.37% higher than the same week last year, and accounting for 98.25% of the total number of reported intestinal infectious disease cases. Among them, the top five regions and counties with the highest incidence rates were Chaoyang, Haidian, Fengtai, Changping and Xicheng, accounting for 61.76% of the total cases; all age stages had cases and the patients were mainly scattered-living children, cadres, students and retirement staff.
As of this week, the city has reported 13938 cases of dysentery, decreasing by 11.61% than the same period last year.

(3) Hand-foot-mouth disease
This week, 672 cases are reported, down 10.28% from last week and up 90.91% from the same period of last year.The top 5 districts and counties with the most cases are Fengtai, Changping, Chaoyang, Haidian and Tongzhou districts, accounting for the 63.84% of the total reported cases. The reported cases are mainly composed of scattered-living children and preschool children, accounting for the 92.86% of the total.
As of this week, the city has reported 17497 cases of hand-foot-mouth disease with four death cases. The city’s cumulative reported cases from May 2 to Aug. 9, 2009 decrease by 11.20% from the same period last year.

III. Precautions
In this week, the epidemic situation of the city is generally stable. Compared with last week, the number of the reported cases of dysentery, infectious diarrhea and other intestinal infectious diseases increased slightly; the number of the reported cases of A H1N1 Influenza began to decrease; the number of the reported cases of hand-foot-mouth disease has decreased for six consecutive weeks and shows the trend of continuing to decrease.

In summer, bacterial food poisoning frequently breaks out due to eating unripe haricot bean, potherb and wild mushroom. According to the monitoring and report of National Disease Supervision Information Management System, food poisoning frequently occurs in many regions of China due to eating unripe, unclean and unwholesome food. Hence, all relevant authorities should adopt diverse means to popularize disease-prevention knowledge, enhance health education, and reinforce knowledge dissemination on the prevention of intestinal infectious diseases and food-borne diseases so as to reduce the occurrence of food-borne diseases and food poisoning.