[The diagnostic importance of determining antibodies in the urine to the virus of hemorrhagic fever with renal syndrome].

Blood sera and concentrated urine were tested for antibodies to HFRS virus. 18 patients were in acute period and 16 had suffered from HFRS 16 years before. Indirect IFA test revealed antibodies in urine of 16 (88.9%) patients with HFRS. Urine antibodies disappeared for 9-22 days. There were no antibodies in the urine of patients with the history of HFRS, though it was registered in high titre in the blood serum. Thus, if the patient has antibodies to HFRS both in the blood and urine, it says about acute stage of the disease and can be used for earlier diagnosis of HFRS.