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Biomedical subjects

B S Kaganov

Publications and source records attributed to B S Kaganov.

16 recordsLinked to original sources
PubMed1992

[Prevalence of hepatitis B in the focus of HIV infection].

Highly sensitive up-to-date research methods (enzyme immunoassay) for HbsAg and antibodies against HBsAg and HBcAg were employed to examine 565 adults and children living in the Kalmuck++ ASSR (Elista and adjacent regions), where in 1988-1989 cases of HIV-infection were recorded. Markers of HBV-infection were detected with a high enough frequency in the control group of children (15.2%). The prevalence of the infection in the adult population was at an intermediate level (38.9%). The high infectivity with HBV-infection was recorded among children who had been hospitalized before (for different diseases including chronic ones), among women who had undergone laboratory studies because of the diagnosis of HIV-infection in their children; among adult patients suffering from tuberculosis of morons from a closed boarding school. The highest frequency of HBV-infection marker demonstration was found in HIV-infected children (70%). The data obtained point to the necessity of vaccination against viral hepatitis B in risk groups (children and adults) and in the newborn as well as of raising the efficacy of preventing measures against infections transmitted via blood.

Acquired Immunodeficiency Syndrome↗
PubMed1992

[Frequency of detection of hepatitis B markers in various chronic diseases in children].

Overall 995 children with different somatic chronic diseases were examined for viral hepatitis B markers demonstration using up-to-date highly sensitive methods (hemagglutination inhibition test, EIA). In the control group (children with acute intestinal infections), HBV-infection markers were discovered in 4.3%. Children with diabetes mellitus (13.1%), chronic renal diseases (18.9%), pulmonary diseases (32.8%), bronchial asthma (33.3%) and hemophilia (85.2%) are attributed to the group at greater risk for HBV infection. As a rule, the rate of HBV-infection markers demonstration in chronic somatic diseases was higher in considerable duration of the underlying illness. The overwhelming majority of the children examined had suffered subclinical forms of HBV-infection as shown by the disease history, whereupon they manifested antibodies against HBV antigens. HBs-antigenemia, that persisted for a long time (chronic HBV-infection) was demonstrable far less frequently. The authors provide evidence for the necessity of carrying out a broad-scale screening of HBV-infection markers in the indicated risk groups and vaccination against hepatitis B in children without HBsAG and without immunity to viral hepatitis B. The importance of measures aimed at preventing infections transmitted via blood is emphasized.

Biomarkers↗
PubMed1991

[Current etiological structure of acute viral hepatitis in children].

The etiological structure of viral hepatitides (VH) was defined in 345 children admitted to the clinic during one year with a diagnosis of acute viral hepatitis. It was established on the basis of clinico-laboratory studies and identification of serological markers of viral hepatitides A, B and delta. It has been demonstrated that in the structure of viral hepatitides in children living in Moscow, VHA accounts for 83.1%, acute VHB for 11.1%, HBV and HDV coinfection for 2.6%, and VH non A non B for 1.7%. In children of the first year of life, acute hepatitis was etiologically related to HBV-infection or to HBV and HDV coinfection. In a negligible part of the patients, VHA was diagnosed in the presence of chronic HBV-infection (1.2%) or exacerbation of chronic hepatitis B (0.3%). These data should be taken into consideration in planning and carrying out diagnostic, treatment and prophylactic measures aimed at solving VH problem in childhood.

Acute Disease↗
PubMed1990

[State of cellular and humoral immunity in children infected with human immunodeficiency virus].

Cellular and humoral immunity was examined in 32 children infected with human immunodeficiency virus, living in the Kalmyk ASSR. For comparison purposes, examinations were also made of 6 healthy children and 11 children afflicted with different diseases, living in the same republic. A dramatic lowering of the absolute content of T helper lymphocytes, an appreciable decrease of the T helper/T suppressor ratio associated with the high level of circulating immune complexes were revealed. In children infected with human immunodeficiency virus, grave immunodepression occurred at the early stages of the pathological process. The authors describe the totality of alterations in the immunological parameters, which may give rise to the generalized forms of opportunistic diseases in children infected with human immunodeficiency virus.

Adolescent↗
PubMed1986

[Measles].

Explore the source record for details and available documents.

Adolescent↗
PubMed1984

[Antibody-dependent cell cytotoxicity and the effect of interferon on K-cell functional activity in vitro in chronic viral hepatitis B in children].

Antibody-dependent cell-mediated cytotoxicity (ADCC) and in-vitro effect of interferon (IF) on the K cell activity was investigated in children with chronic hepatitis B (CHB) and normal donors. The ADCC in CHB was significantly decreased under normal values. The low K cell activity in CHB might determine inadequate elimination of infected liver cells and continuation of hepatitis B virus replication. IF in vitro significantly stimulated the ADCC of normal blood donors but was unable to significantly increase the ADCC of CHB patients. The in-vitro stimulation of the ADCC of normal donors by IF might be a phenomenon due to an increase of the adult K cell cytotoxic potential and/or activation of pre-K cell maturation. The lack of in-vitro augmentation of the ADCC of CHB patients by IF might result from the decreased quantity of K cells of pre-K cells in the peripheral blood and/or their low susceptibility to the stimulating effect of IF.

Adolescent↗
PubMed1984

[Change in the activity of natural killer cells in normal subjects and in virus diseases on exposure to interferon in vitro].

The activity of natural killers was examined in peripheral blood of healthy subjects and patients with chronic hepatitis and disseminated sclerosis. An attempt was made to correct natural killer activity by human leukocyte interferon in vitro. To assess the activity of natural killers, use was made of the method of serial dilutions. An optimal effector/target ratio was employed in experiments. The patients with chronic hepatitis and disseminated sclerosis demonstrated a reduction in the activity of natural killers whatever the effector/target ratio. The action of interferon in vitro is specific immunomodulatory in nature. Administration of interferon in a dose of 250 Units/ml raises the magnitude of the cytotoxic index in healthy donors and in patients with chronic hepatitis and disseminated sclerosis, making the shape of the killer activity curve approach that of normal. Such an approach can be used for preliminary assessment of the sensitivity of natural killers to interferon in viral diseases of man. The potentialities and efficacy of interferon in clinical medicine are discussed.

Hepatitis B↗
PubMedDate not supplied

[The detection of hepatitis B virus DNA in the blood serum of children with chronic HBsAg-positive hepatitis].

The presence of HBV DNA in the blood serum of 50 children with HBsAg-positive chronic hepatitis (36 with chronic hepatitis B, 14 with chronic hepatitis delta) was determined by molecular hybridization method. No significant differences were observed between the frequency of HBV DNA detection and clinicomorphological type of chronic HBsAg-positive hepatitis. In chronic HBV infection, HBV DNA was shown to be detected more frequently than in chronic hepatitis delta. A correlation was confirmed between the frequency of HBV DNA detection and demonstration of HBeAg in the blood. With the increase in the duration of the disease and age of the patients the HBV DNA detection rate was found to diminish.

Adolescent↗
PubMedDate not supplied

[The clinical picture, course and outcome of viral hepatitis A in children with chronic HBV infection].

The clinical picture, course and outcomes of hepatitis A developing as a superinfection in children with chronic hepatitis B virus (HBV) infection, hospitalized in connection with acute viral hepatitis, were determined on the basis of the dynamic clinico-laboratory investigation and identification of viral hepatitides A, B and delta by the method of enzyme immunoassay. In all children hepatitis B virus surface antigen (HBsAg), i.e. the serological sign of HBV infection, and anti-HAV IgG, the serological sign of hepatitis A virus (HAV) infection, were present in the blood. 11 out of 12 children had never before been examined for diseases of the liver. Only in one child chronic HBsAg carriership had been detected 14 months before this hospitalization. Considering the data of epidemiological history and clinical observations, as well as the results of serological survey, these children were found to have hepatitis A superimposed on chronic HBV infection. As revealed in the present investigation, in cases of HAV superinfection observed simultaneously with chronic hepatitis B viral hepatitis A was manifested by typical clinico-laboratory symptoms.

Adolescent↗
PubMedDate not supplied

[Chronic hepatitis C in children].

The clinico-laboratory manifestations and outcomes of chronic hepatitis C have been studied in 49 children. The proportion of chronic hepatitis C in the structure of chronic viral hepatitides in children is 20.5%. Among chronic hepatitis C patients, in 18.4% chronic persisting hepatitis, in 20.4% chronic active hepatitis and in 61.4% chronic active hepatitis with transition to cirrhosis of the liver have been diagnosed. In patients with chronic hepatitis C manifested as chronic persisting hepatitis or chronic active hepatitis the course of the disease is characterized by intermittent periods of prolonged exacerbations and short remissions. In cases of chronic active hepatitis with cirrhosis of the liver the signs of the active process can be constantly detected in the course of prolonged observations. In some patients with chronic active hepatitis the lethal outcome is possible as the consequence of progressing liver insufficiency. The data obtained in this investigation indicate that autoimmune chronic hepatitis in children, extensively described in Russian and foreign literature, may be etiologically linked with hepatitis C virus.

Biomarkers↗