关键词: 肾综合征出血热, 国家级监测点, 宿主动物, 监测

Abstract:

Objective To get an insight into the composition, distribution and HV-carrying condition of host animals in the national monitoring sites of hemorrhagic fever with renal syndrome (HFRS) in Hebei province, providing scientific evidence for the prevention and control of the epidemic. Methods Investigations of host animals were carried out in spring and autumn, respectively, in the four national monitoring sites, with the trap-night method used for the detection of the density of rats and immunofluorescence technique for that of the pulmonary virus antigen of the pests. Results It was found that from 2005 to 2009 the density of rats in the populated area in the monitoring sites fluctuated between 0.63% and 2.50%, and the density of rats in the open country between 0.37% to 0.71%, with a higher density of the pests in the populated area than in the open country (χ²＝177.05, P＜0.01). The virus-carrying rate of rats in the populated area was 1.76% with the rate being 0.84% in the field. In terms of the composition of the host animals, Rattus norvegicus was the dominant host (77.39%), followed by Tscherskia triton (12.42%) and Mus musculus (8.70%). In the 12 positive rodents, 10 were R. norvegicus (83.33%), 1 was M. musculus (8.33%)， 1 was T. triton(8.33%). Conclusion R. norvegicus is the main host animal and source of infection in Hebei province, playing an important role in the transmission of HFRS. Both the density of rats and the Hantavirus-carrying rate were low, indicating that it is less likely for HFRS to have an outbreak in Hebei province.

Key words: Hemorrhagic fever with renal syndrome, National monitoring site, Host animal, Surveillance