Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0002878 (hemolytic anemia)
 7,530 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Parvovirus B19 infection can cause severe complications in pregnant women, individuals with haemolytic anaemia, and those who are immunocompromised. In a hospital outbreak of this infection, a balance should be struck between protection of these individuals and the maintenance of medical services. The index case of an outbreak of parvovirus B19 infection among staff and patients of a paediatric ward was not identified. 58 members of staff were screened for B19 markers and 4 of the 6 susceptible men and 6 of the 24 susceptible women became infected (p = 0.05) as defined by serum IgM and viraemia. 1 of the 11 adults (10 members of staff and 1 parent) infected remained symptom-free. 12 immunocompromised patients were also assessed, and symptom-free infection developed in 2 of these. During the outbreak staff with symptoms were put on sick leave, immunocompromised patients (there were none with haemolytic anaemia) were given normal human immunoglobulin and nursed in single rooms by B19 IgG-positive, IgM-negative staff, and the ward was closed to B19 IgG-negative pregnant women. However, the limitation of spread of infection cannot be attributed with certainty to the measures taken.
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PMID:Parvovirus B19 outbreak in a children's ward. 134 28

Parvovirus B19 DNA can be detected by polymerase chain reaction with double primer pairs (nested PCR). Recent infection was documented by a retrospective serological study using Parvoscan-B19 enzyme linked immunosorbent assay (EIA) for detection of B19 human parvovirus IgM and IgG antibodies in serum or plasma specimens. In 3 families B19 outbreaks caused aplastic crises necessitating blood transfusion in 5 children and 1 adult with hereditary sphaerocytosis. Four members from 2 of the families had clinically overt haemolytic anaemia prior to the event. Two members in another family presented with an aplastic crisis disclosing the underlying chronic haemolytic disease. All 7 patients were identified as PCR positive in serum samples taken 3-14 days after the onset of symptoms. Comparison with dot blot hybridization revealed detectable DNA in only 2/3 PCR positive patients. Thus, nested PCR is more sensitive than the dot blot hybridization method and is therefore a suitable complement to the antibody assay for identifying recent B19 infection.
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PMID:Polymerase chain reaction with double primer pairs for detection of human parvovirus B19 induced aplastic crises in family outbreaks. 150 32

We diagnosed infections from human parvovirus B19 in three patients by using dot-blot hybridization and a polymerase chain reaction to detect B19 DNA and using an enzyme immunoassay to detect IgG and IgM to B19. For 5 months a 5-year-old boy with acute lymphoblastic leukemia in remission had anemia without reticulocytes or bone marrow erythrocyte precursors. His serum lacked IgG and IgM to B19 but contained B19 DNA. He received gamma globulin intravenously (0.4 gm/kg/day for 5 days); his viremia promptly cleared and reticulocytosis developed. A 14-year-old boy with acute lymphoblastic leukemia in remission had fever, rash, neutropenia (less than 300 leukocytes/mm3), and a hemophagocytic syndrome lasting 3 weeks. His serum contained IgM to B19 and B19 DNA. Without therapy, IgG to B19 developed; although low levels of B19 DNA persisted, the leukocyte count returned to normal. In a 19-year-old patient with systemic lupus erythematosus and hemolytic anemia, an aplastic crisis lasted 2 weeks. Her serum lacked IgG and IgM to B19 but contained B19 DNA. Without therapy, IgG and IgM to B19 appeared, viremia diminished, and reticulocytosis occurred. These patients illustrate the varied manifestations of chronic B19 infections, the importance of DNA detection for diagnosis, and the possible efficacy of gamma globulin therapy.
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PMID:Manifestations and treatment of human parvovirus B19 infection in immunocompromised patients. 168 74

The B19 strain of parvovirus causes several distinct and important clinical diseases in humans. Aplastic crisis in patients with chronic hemolytic anemia, persistent bone marrow depression in immunocompromised individuals, and hydrops fetalis all result from direct infection of hematopoietic cells by the virus. Erythema infectiosum, arthritis, and purpuric vasculitis are postinfectious manifestations of B19 parvovirus infection.
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PMID:Human parvovirus infections. 215 61

Human parvovirus B19 can be an important etiological factor in aplastic crises in patients with chronic hemolytic anemia, in fetal damage, and in acute polyarthritis. B19-virus can only be grown in cell cultures established from human bone marrow, where the virus production occurs in erythroblasts. Parvovirus can cause severe, often fatal, infections in various kinds of animals, also in their fetuses, and many cases of teratogenic changes have been described. The B19-infection is diagnosed by demonstration of either IgM antibodies or B19-DNA in serum samples obtained in the early phases of infection. Patients with EI are infectious before skin eruptions occur, i.e. in the prodromal phase where virus can be detected in respiratory secretion. Transmission of the infection by concentrated, heat-treated factor preparations has been reported. Acute polyarthritis accompanying B19-infections has most often been described to affect the finger, hand and knee joints in adult women. Maternal B19-infections can be complicated by intrauterine infections damaging the fetus and resulting in abortion, hydrops fetalis or stillbirth. The B19-infection has not with certainty been found to be teratogenic. Recent studies seem to show that about 10-20% of primary maternal infections can be complicated by fetal damage, but until further this percentage should be regarded with great reservation.
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PMID:[Parvovirus B19 infections. The cause of fifth disease-erythema infectiosum--can also cause aplastic crises, fetal damage and polyarthritis]. 216 Jul 48

A child undergoing induction therapy for acute lymphoblastic leukemia suffered an aplastic crisis associated with B19 virus infection. Good response to the antiblastic therapy led to a burst in erythropoiesis favoring high viral replication, which was responsible for strong erythroblastic inhibition and severe viremia. The patient's B19 antibody response became evident very late, probably because of the antiblastic effect of the therapy; nevertheless, recovery was complete in little more than a week, favored by B19 IgG transfusion with a red blood cell concentrate. This report suggests that immunosuppressed subjects, as well as those suffering from hemolytic anemia must also be considered "at risk" for aplastic crisis due to B19 infection.
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PMID:Aplastic crisis caused by B19 virus in a child during induction therapy for acute lymphoblastic leukemia. 254 76

A previously healthy 11-year-old white female presented with a Coomb's positive hemolytic anemia and reticulocytopenia. The patient was treated with prednisone (6.4 mg/kg/day) and had a stable hemoglobin with subsequent recovery of reticulocytes by 7 days. Bone marrow aspiration showed hypercellularity with arrest of red cell maturation. The patient's serum contained specific IgM and IgG antibodies to parvovirus B19. Our report confirms parvovirus B19 as a cause of reticulocytopenia at presentation in autoimmune hemolytic anemia. Immunosuppressive therapy with prednisone did not appear to significantly prolong the course of the B19 infection.
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PMID:Parvovirus B19 infection associated with reticulocytopenia and chronic autoimmune hemolytic anemia. 254 64

Two siblings with chronic hemolytic anemia due to red cell pyrimidine-5'-nucleotidase (P-5'-N) deficiency, presented within a few days of each other with a febrile illness and pancytopenia. The cause of the aplastic crisis was an acute infection with human B19 parvovirus (B19 HPV) as proven by immunoelectron microscopy and DNA hybridization. This is the first report on the association of B19-HPV-related aplastic crisis with P-5'-N deficiency.
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PMID:Aplastic crisis due to human B19 parvovirus infection in red cell pyrimidine-5'-nucleotidase deficiency. 254 57

Discovered by chance in 1974, the human serum parvovirus B19 is at present the only recognized, autonomous, pathogenic human parvovirus. For some years following its discovery, B19 was not associated with any defined clinical syndrome; although a high titre viraemia was often noted in infected individuals they were largely asymptomatic. In 1980 the causal association between B19 infection and aplastic crisis in chronic haemolytic anaemia began to emerge with the discovery of B19 as the agent responsible for aplastic crisis in sickle cell anaemia. This fulfilled the expectation of a disease of tissue comprising a large proportion of dividing cells, namely the erythropoietic elements of the bone marrow, anticipated in autonomous parvovirus infection where viral replication is confined to dividing cells. More recently, erythema infectiosum, an illness sharing many of the clinical features of rubella, has been found to be the common result of B19 infection, although a spectrum of disease is now emerging. Much effort is currently directed toward the elucidation of the effects of maternal B19 infection on the developing fetus.
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PMID:Human parvovirus infections. 282 52

Since 1981 an increasing number of human parvovirus infections have been reported. There is now clear evidence that parvovirus B19 is the causative agent of erythema infectiosum (fifth disease). Further clinical situations associated with this virus include aplastic crisis in patients with hemolytic anemia and acute and persistent arthropathies preferentially occurring in adult women. Transplacental infection during pregnancy may result in hydrops foetalis, intrauterine death and spontaneous abortion. Additional, thus far barely characterized parvoviruses have been isolated from individuals with enteritis or rheumatoid arthritis. The present review summarizes today's knowledge of the biological properties and relevance of human parvoviruses as pathogens. The potentialities and limitations of laboratory diagnosis in parvovirus infections are discussed.
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PMID:[Parvoviruses as pathogenic agents in man]. 283 18


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