| [study on the geographic distribution and serological typing of hfrs in hebei province]. | surveillance on the hfrs had been carried out during the period of 1986-1993. rodent density ranged from 4.6%-12.2% with r.norvegicus exceeding 60% in all kinds of rodents. hv antigen carrier rate of r.norvegicus was 1.3%-7.5%, much higher than that among other rodents. a significantly positive correlation had been observed between the hfrs morbidity and the r.norvegicus density. of 129 specimens from hfrs patients, 89% belonged to the type of seov. in the eastern and centre parts of hebei plain ... | 1996 | 8758402 |