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T K Dzagurova

Publications and source records attributed to T K Dzagurova.

At least 19 recordsLinked to original sources
PubMed2005

[Nervous system involvement in hemorrhagic fever with renal syndrome].

The authors of the article describe two cases of hemorrhagic fever with renal syndrome (HFRS) with prevalence of signs of nervous system involvement. The first case was a 40-year-old woman with moderate HFRS, who developed Guillain-Barre syndrome of axonal-demyelinating polyneuropathy. An important observation was the absence of hemorrhagic or renal syndrome; combined therapy including plasmapheresis was successful. The second case demonstrated polymorphism of HFRS clinical manifestations with prevalence of neurological symptoms, which consisted in encephalopathy and no renal failure signs; hemorrhagic syndrome was moderate. In both cases the diagnosis was confirmed by elevated titer of antibodies to HFRS virus, belonging to the group of hantaviruses.

Adolescent↗
PubMed1992

Anti-hantavirus antibodies in human sera in Czechoslovakia.

By indirect immunofluorescence using antigens of hantavirus Hantaan and CG 18-20 on Vero E6 cells were examined 5,827 samples of sera from 5,299 probands of Czechoslovakia. In 49 persons (0.94%) were found antibodies of titres 1:32 and higher. Two groups of elderly farm workers showed a cluster of positive individuals amounting to 9.9% and 29.4% respectively. The ratio of positivities in some other, randomly and specifically selected groups was deep below 1%. The partial results for the group of farmers were confirmed by RIA test. Occasionally antibodies only to one of the hantavirus serotypes, at other time, to both were found. The authors discuss the findings of antibodies of the two serotypes in humans as related to the evidenced existence of two hantavirus antigen serotypes in animals.

Adolescent↗
PubMed1988

Enzyme immuno assay for the detection of virus specific IgG and IgM antibody in patients with haemorrhagic fever with renal syndrome.

Consecutive serum samples collected from 235 patients with Haemorrhagic Fever with Renal Syndrome (HFRS), between two days and two years after onset of disease, have been analysed for the presence of IgG and IgM type of antibodies specific for Hanta-viruses. The sera were screened in parallel by a newly developed indirect Immuno Enzyme Assay (EIA) in parallel with Indirect Immunofluorescent Antibody Assay (IFA). In both tests the Hantaan virus strain 76-118 was used as the antigen. The EIA was much more sensitive than the IFA test for the detection of IgM type antibodies. With the indirect EIA IgM type antibodies against Hantaan virus 76-118 have been detected in HFRS patient's sera from the second day of illness indicating the usefulness of this test for the early serological diagnosis of this disease.

Antibodies, Viral↗
PubMed1986

[Time periods of antibody preservation in patients convalescing from hemorrhagic fever with renal syndrome in European foci of the infection].

The radioimmunoassay of serum samples from 76 convalescents after hemorrhagic fever with the renal syndrome (HFRS), that took place in 1964 in Ufa, revealed the presence of specific antibodies in 75% of the convalescents. The absence of antibodies may be attributed both to their loss in some of the convalescents and to mistakes in the clinical diagnosis. The study of serum samples from 19 convalescents who had the infection in 1960 during the laboratory outbreak of HFRS at the Gamaleya Institute of Epidemiology and Microbiology (Moscow) showed the presence of antibodies in all convalescents. In both groups the infection was linked with common red-backed voles (the Western serological variant of the virus).

Adult↗
PubMed1986

Hemorrhagic fever with renal syndrome in Czechoslovakia: detection of antigen in small terrestrial mammals and specific serum antibodies in man.

A direct ELISA technique was used for demonstration of HFRS virus antigen in suspensions of the lungs obtained from 774 wild small mammals belonging to 13 zoological species trapped in 21 localities in Czechoslovakia between 1983 and 1984. Western serotype of HFRS virus was demonstrated in the lungs of 8 Microtus arvalis voles caught in the areas of central Bohemia, southern Moravia and western Slovakia, and in one Clethrionomys glareolus vole from the area of eastern Slovakia. The eastern serotype antigen was found in one Apodemus agrarius field mouse captured in the area of eastern Slovakia. The antigen titres as determined in the lungs of these rodents by the ELISA and RIA techniques were relatively high. Human sera examined for the presence of HFRS-specific antibody by the indirect fluorescence and RIA techniques were 76 serum specimens from chronic kidney patients treated by hemodialysis and 349 sera of adult males over 35 years of age coming from various districts of Bohemia and Moravia. Antibodies against HFRS virus antigen were found in 4 sera obtained from northern Bohemian men. The results provide the evidence which suggests that the natural foci of HFRS are likely to occur across much of the Czechoslovak territory, and confirms the focality of this infection in at least some of the localities characteristic in the 1950s and 1960s of the incidence of severe sporadic cases of HFRS.

Adult↗
PubMed1984

Indirect solid-phase immunosorbent assay for detection of arenavirus antigens and antibodies.

Indirect enzyme-linked immunosorbent assay (ELISA) and solid-phase radioimmunoassay (SPRIA) using either anti-human or anti-mouse IgG labelled with horseradish peroxidase and 125I, respectively, were developed for the detection of Junin, Machupo, Tacaribe, Amapari, Tamiami, Lassa and LCM arena-viruses. Both methods allow high sensitivity detection of arena-virus antigens and antibodies.

Animals↗
PubMedDate not supplied

[An epidemiological analysis of hemorrhagic fever with renal syndrome morbidity in the Republic of Bashkortostan in 1997].

The outbreak of hemorrhagic fever with renal syndrome (HFRS) in the Republic of Bashkortostan, resulting in 10,057 registered cases of the disease (287 cases per 100,000 of the population), was analyzed. HFRS cases among the population were registered in 52 out of 54 regions of Bashkortostan. 31% of the total number of patients were the inhabitants of rural regions (170 cases per 100,000) and 69% were urban dwellers (295 cases per 100,000), mainly in Ufa (512 cases per 100,000). HFRS morbidity among males was fourfold higher than among females. In 70% of cases persons aged 20-49 years were affected. 5% of the total number of patients were children aged up to 14 years. In 34 cases (0.4%) the severe clinical course of the disease had a fatal outcome. Cases of HFRS were registered from April 1997 till March 1998 with the highest morbidity rate observed during the period of August-December. In most cases (46.8%) both urban and rural dwellers contacted infection during a short-term stay in the forest. As the result of the serological examination of the patients, all HFRS cases were etiologically attributed to hantavirus, serotype Puumala. The main natural reservoir of this virus and the source of human infection in Bashkortostan were bank voles (Clethrionomys glareolus), the domination species among small mammals in this region.

Adolescent↗
PubMedDate not supplied

[Outbreak of hemorrhagic fever with kidney syndrome in Egor'ev district of Moscow region].

Epizootological, serological, and molecular virological analysis of an outbreak of hemorrhagic fever with renal syndrome (HFRS) in the Egoryevsk district of Moscow region (September 1995-January 1996) has been carried out. Hantavirus (Puumala) antigen and virus-specific antibodies were isolated from bank voles captured in the endemic focus. Anti-Puumala antibodies were detected in the sera of all HFRS patients and in 2% healthy residents of the endemic focus. Analysis of nucleotide sequence (RNA from hantavirus-positive lung of a bank vole) showed that the studied hantavirus is a distinct genotype of Puumala virus. Hence, a new highly active natural focus of HFRS associated with Puumala virus, dangerous for the population, has been revealed in Moscow region.

Animals↗
PubMedDate not supplied

[The spread of hantaviruses in western Siberia].

Studies made in west Siberia established the existence of at least 4 hantavirus types: Puumala, Tula, Topografov, and Dobrava/Belgrade. The authors detected Puumala virus genovariants in voles, Tula virus in sagebrush and narrow-skulled voles, and Topografov virus in Siberian lemmings. The etiological role of the hantavirus Dobrada/Belgrade was defined in the structure of morbidity of hemorrhagic fever with the renal syndrome. In Russia, hantaviruses were first detected in mites: a hantavirus antigen was found in one of the enzyme immunoassayed pools of the mole mites (Haemogamasus ambulans) collected from the Siberian lemming brooding burrow in the near-floodplain habitats of the transitional Yenisei tundras in southwest Taimyr.

Animals↗
PubMedDate not supplied

[Adaptive property of hantaviruses during their isolation from cultured VERO-E6 cells in relation to the type of the ecological host].

As a result of virological studies, 185 lung tissue specimens from 4 rodent species caught near Khabarovsk were isolated and fixed in the passages of cultured Vero-6 cells of 68 hantavirus strains. The capacity of the strains to adapt to the cells was assessed by using the adaptive index involving the mean rates of successful isolation, its duration, hantavirus antigen titer in the material used for infection. The strains of hantavirus serotypes were noted for the highest adaptive properties, which are ecologically associated with rodents of the family Mus, such as field and East-Asiatic mice. Lower adaptive capacities were established for the strains of hantavirus serotypes, which are ecologically related to rodents of the family Cricetidae, such as large and large-toothed redback voles. The differences found in the adaptive capacities of hantavirus strains cultured in Vero-E6 cells reflect the degree of specialization of some hantavirus serotypes to particular host rodent species during their long-term coevolution.

Adaptation, Biological↗
PubMedDate not supplied

[The epizootological and virological characteristics of a natural hantavirus infection focus in the subtropic zone of the Krasnodarsk Territory].

A natural focus of hantavirus infection was detected and examined during the studies conducted in 2000-2002 around the Sochi (the western spurs of the Great Caucasus Ridge, which descended to the Black Sea (the Krasnodar Territory of Russia). At least 4 rodent species, such as Microtus majori, A. (S.) ponticus, A. agrarius, A. (S.) ciscaucasicus, were shown to participate in the circulation of hantaviruses. A comparative analysis of the nucleotide sequences of genomic S- and M-segments of hantaviruses has provided evidence that 13 viral RNA isolates from the A. (S.) ciscaucasicus belong to the Dobrava/Belgrade virus clade; however the RNA isolate from the Microtus majori belong to the Tula virus clade.

Animals↗