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Med Arch. 2009; 63(3): 160-162

Collective Immunity of the Population from Endemic Zones of Hemorrhagic Fever with Renal Syndrome in Kosovo

Sefedin Muçaj, Serbeze Kabashi, Salih Ahmeti, Isuf Dedushaj, Naser Ramadani, Tatjana Avsic-Zupanc.


Hemorrhagic fever with renal syndrome (HFRS), also known as mice fever is an acute viral zoonosis and it appears in the natural focus after the human contact with Hantaan virus infected mice. The objective (purpose) of this study was to investigate the prevalence of specific antibodies in HFRS, in convalescent persons (collective immunity in endemic hearths).In this project we applied the epidemiological method of studying with retrospective-perspective, the serological method for determination and detecting antibodies from the persons of epidemical focus and statistical methods. The disease diagnosis is based on the epidemiological, clinical and serological records. The collected samples have been sent to referral laboratory in Medical Faculty- Institute of Microbiology Ljubljana for laboratory confirmation. From the results we came to conclusion that in the territory of Republic of Kosovo, the HFRS is still a serious health, economic and biological problem. The lethality rate from HFRS in 1986 was 15.4%, 1986-89 10.8%, from 1995-2006 8.70%. The lowest rates of morbidity, mortality and lethality of HFRS compared with the previous periods of time, prove collective immunity growth in Dukagjini valley. For collective immunity research and to conduct the persistence of antibodies for viral corresponding (relative) antigen, after the disease, the samples were collected in the time period of May- June 2008, with 203 persons that were tested with serological method IIF (Indirect immune fluorescence) from which 187 cases (92.1%) resulted sero-negative and 16 cases (7.9%) resulted sero-positive with HFRS. This proves the collective immunity increase for HFRS. From 13 recovered patients previously diagnosed with HFRS (1986-1989-1995), levels of antibodies were screened in 2008 with IIF. Out of 13 persons, positive antibodies were found in 10 cases, while 3 cases were negative for antibodies (HTN, PUU, and DOB).After 13, 19 and 22 years HTN, PUU and DOB antibodies persisted in level (1:16-1:512). Based on the gathered results, we came to conclusion that it is necessary to compile the National Strategy of Surveillance for the Kosovo Health System for a 5 year period, for avoiding this high risk disease.

Key words: HFRS, collective immunity, (HTN, PUU, DOB) antibodies persisted after 13, 19 and 22 years, IIF, Republic of Kosovo

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