Study on epidemiology for SARS in Guangzhou

  Objective   To probe the feature of SARS epidemic in Guangzhou and to constitute the effective preventive and control measures.

  Methods   The epidemiology characters for SARS in Guangzhou, China, were been summarized and analyzed by the method of spot epidemiology and serum epidemiology investigation combination.

  Results   The case-fatality rates(CFRs)was 4.05%;The incidence of the young and adult was higher than other age groups.The IgGpositive rate of the specific contaction history or infectivity cases was significant higher than other cases.The proportion of having contaction history or infectivity cases was decreased monthly and that of the IgG positive cases were above 50%.The IgG positive rates for case and animal oscalation contaction groups were higher than those of possible cases and control groups.

  Conclusion   The epidemic period for SARS in Guangzhou was mainly in winter and spring, lasting for about four months.The serum test results indicated that covert infection and slight infection may exist.The SARS epidemic canditions could be predicted by inspecting the proportion of having contaction history or infectivity of the cases as well as the IgG positive rate of the patients.The serum surveillance from different group of people indicated that the SARS-cov in human and animals may be different.