RESUMO
Petridou et al. [1] have reported an increase in infant leukemia in Greek children born between 1/7/86 and 31/12/87 and have linked this increase to in utero radiation exposure due to the Chernobyl accident. Subsequently, Michaelis et al. [2] have reported a similar trend for Germany but found that it was not correlated to the levels of contamination. For Belarus, which was much more severely affected, a similar but much weaker trend is found.
Assuntos
Leucemia Induzida por Radiação/epidemiologia , Leucemia/epidemiologia , Liberação Nociva de Radioativos , Estudos de Coortes , Alemanha/epidemiologia , Grécia/epidemiologia , Humanos , Incidência , Lactente , Recém-Nascido , Reatores Nucleares , Centrais Elétricas , Leucemia-Linfoma Linfoblástico de Células Precursoras/epidemiologia , República de Belarus/epidemiologia , UcrâniaRESUMO
Data on the incidence of acute leukemia (AL) in children in the Byelorus Republic is analysed and comparisons made between the incidence of AL prior and subsequent to the Chernobyl accident in 1986. The Byelorus Republic was directly and heavily contaminated at that time and careful records of the incidence of cases of AL and other malignancies have since been kept. Byelorus is divided into large administrative regions-oblasts-which are subdivided into raions. Both the levels of radiation and estimates of chemical pollution in these areas are available. Childhood AL incidence appears to be unrelated to radiation dosage in that no increases were seen in the more radiation contaminated areas. However there appeared to be a more likely relationship with chemical pollution. Adult AL and other myeloproliferative and lymphoproliferative disorders have appeared to increase since 1986 but again the authors attribute this more to rising levels of chemical pollution possibly associated with radiation as a coleukemogen.
RESUMO
Childhood leukemia (ICD 204-208 [1]) incidence rates in the different regions of Belarus are reported for a period before and after the Chernobyl accident (1982-1994). There are, at this point, no recognizable trends towards higher rates.
Assuntos
Leucemia/etiologia , Centrais Elétricas , Liberação Nociva de Radioativos , Adolescente , Distribuição por Idade , Criança , Feminino , Humanos , Incidência , Leucemia/diagnóstico , Leucemia/epidemiologia , Masculino , República de Belarus/epidemiologia , Distribuição por Sexo , UcrâniaRESUMO
The data on post Chernobyl hematological malignancies incidence rates in Belarus are plotted. No statistically significant increase of incidence rates in childhood is observed in contrast to adults. However, no direct association of the incidence rates with a radiation factor is discovered 10 years following Chernobyl. Some indirect correlations are found like chemical pollutions and a possible synergistic effect of the latter with ionising radiation exposure may appear as risk factors for these diseases. Adults demonstrate a significant increase of morbidity due to these malignancies after the Chernobyl disaster.
Assuntos
Leucemia Induzida por Radiação/epidemiologia , Linfoma/epidemiologia , Neoplasias Induzidas por Radiação/epidemiologia , Centrais Elétricas , Liberação Nociva de Radioativos , Adolescente , Adulto , Criança , Pré-Escolar , Humanos , Incidência , Lactente , Linfoma/etiologia , Ucrânia/epidemiologiaRESUMO
The possibility of using monkey red blood cells conserved by freezing at --196 degrees C in serological tests was studied. Hemagglutination and hemagglutination-inhibition tests with measles antigen and measles gamma globulin revealed no differences in the sensitivity of native and conserved red blood cells. The method of washing red blood cells from cryoprotective solution modified by the authors is described.
Assuntos
Preservação de Sangue/métodos , Eritrócitos/imunologia , Animais , Haplorrinos , Testes de Inibição da Hemaglutinação , Testes de Hemaglutinação , MacacaRESUMO
The distribution of blood groups of the ABO system is different in the rhesus-positive and rhesus-negative subpopulations. An increasing frequency of the phenotype A2 in the rhesus-negative subpopulation is observed. The calculation of the gene frequency reveals a deficiency of genes A1 and O, and the increasing frequency of genes A2 and B in the rhesus-negative part of the population. On the whole for the inhabitants of Minsk the ratio of the phenotypes A2/A1 differs significantly from the corresponding index for the republic as a whole, which is the evidence of a significant migration of the population in the capital of Byelorussia. The observed correlative dependences in the distribution of the genes of ABO system and of the rhesus system permit to recommend the accomplishment of a scientific search between the hereditary pathology and the susceptibility to different diseases and blood groups taking into consideration the rhesus appurtenance of the populations studied.
