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  • 1
    ISSN: 1432-1440
    Keywords: Human immunodeficiency virus ; Acquired immunodeficiency syndrome ; Hemophiliacs ; Natural history ; Virus isolation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary At our institution 686 hemophiliacs are being treated. Of them 402 (59%) are anti-HIV-seropositive. The general use of heat-treated clotting factor products was begun in July 1983, and from May 1984 all patients exclusively used heat-treated clotting factors. Thus, one can assume that infection occurred no later than early 1984 in our patients. Since December 1985 HIV-positive hemophiliacs have regularly been clinically and immunologically examined. Most of the 306 patients who could be investigated were clinically symptom-free at the time of their first visit. However, 45 patients have developed AIDS from 1982 through August 1988. The mean survival time of hemophiliacs with AIDS is less than 6 months. In 36% of those 274 patients who have been followed for a mean period of 14 months the clinical stage of the disease worsened by at least one stage according to the classification system proposed by the Centers for Disease Control. We did not find a correlation between clotting-factor consumption during the years 1984–1986 and the actual clinical stage of the patients. Virus isolation from peripheral blood lymphocytes (PBIs) answered the question whether anti-HIV seropositive hemophiliacs are not only immunized but really infected in many more cases than those revealed by detection of p24 antigen or decline of p24 antibody. Positive viral culture correlated strongly with a drop in CD4+ lymphocytes under the level of 400/µl. However, HIV could not be cultured regularly in advanced cases, suggesting that virus replication in PBLs is not necessarely the cause of depletion of T-helper cells. There is no evidence that the natural history of HIV infection in hemophiliacs is different from that in other HIV-infected patients.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1831
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract To determine whether the biological variability of HIV-1 has any clinical significance, the highly variable cytopathogenicity of 153 HIV-1 strains, isolated from 119 hemophiliacs, was related to the number of CD4+ lymphocytes present in the patient's blood at the time of virus isolation. It was shown that the cytopathogenicity of the HIV-1 isolates was inversely correlated with the number of CD4+ lymphocytes. The highest CD4+ cell numbers were observed in 34 latently infected patients characterized by HIV seropositivity, failure of virus isolation, and detection of viral DNA by the polymerase chain reaction. Cytopathogenicity of the HIV-1 isolates was a reliable prognostic marker and correlated well with other lesssensitive prognostic parameters, including the detection of infectious virus and p24 antigen in the plasma, and the decline of p24 antibody in the serum. The results suggest that the viral isolates — if not subjected to extensive passage — represent in vivo variants selected from a heterogeneous viral population according to the particular immunological conditions of the host.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The investigation of 114 unrelated patients, representing about half the sample of the German haemophilia B population, enabled us to delineate the causative mutation in 103 (90.4%) haemophilic factor IX genes. Of these 103 cases 84 (81.6%) turned out to be unique molecular events, the remainder being repeats. Haplotype analysis revealed that the great majority, if not all, of these recurrent observations occurred independently. This conclusion is supported by our finding that three de novo mutations could be demonstrated at two sites of frequent mutation. A further 20 de novo events could be established in an unselected sample of 37 families with sporadic haemophilia B and 37 families with a history of the disease. Altogether, the germ line of origin could be determined in 21 of these 23 cases, thereby indicating a ratio of male to female mutation rates close to 2. On the basis of the data available, it is becoming clear that rearrangements in the factor IX gene (35.4% of de novo cases) are responsible for haemophilia B at a higher frequency than has been observed today (12.3%). More than two-thirds of the de novo cases cause the severe form of the disease, thereby reflecting the deficit of these haemophilic genes in the actual gene pool because of excess mortality in the past. In addition 40% (12/30) of the de novo single-base mutations were transitions at CpG dinucleotides. Compared with the expected at-random frequency, this observation indicates an 83-fold enhancement of mutation at CpG.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1076
    Keywords: HDV infection ; Chronic hepatitis ; HIV infection ; Haemophilia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The hepatitis D virus (HDV) infection plays a major role in severe liver damage caused by hepatitis. To establish the prevalence of HDV infection in haemophilic patients and patients without haemophilia, 87 patients with chronic hepatitis B virus (HBV) infection were examined for serological evidence of delta hepatitis. In addition HBV, HDV and human immunodeficiency virus type 1 (HIV) infection markers were compared to clinical and histopathological outcome of hepatitis. Out of 46 haemophiliacs 30 (65%) were anti-HD-seropositive; 10 out of 30 anti-HD-positive patients (33%) had pathological liver function tests compared to 2 out of 16 anti-HD-negative haemophiliacs (13%). The rate of HIV infection did not differ between the HDV infected and the non-HDV infected individuals with haemophilia (17/27 anti-HD-positive patients versus 12/16 anti-HD-negative patients). Two haemophilic anti-HD-positive patients underwent liver biopsy, in both cases hepatitis D antigen (HDAg) was detected in the biopsies. Only 2 out of 41 patients without haemophilia were anti-HD-positive. Both had pathological liver function tests; chronic active hepatitis and cirrhosis, respectively, were diagnosed and HDAg was found in the liver biopsies. Out of 39 anti-HD-seronegative patients without haemophilia, 26 (67%) were hepatitis B e antigen positive; in the sera of 20 patients )51%) HBV-DNA was demonstrated, but only 6 patients (15%) had pathological liver function tests. In conclusion a high seroprevalence of HDV infection was found in haemophilic patients treated with non-pasteurized commercial clotting factor concentrates. An endemic spreading of HDV infection in patients without haemophilia with chronic HBV infection could not be detected. In haemophilic patients pathological liver function tests were more frequently associated with HDV superinfection than with chronic HBV infection alone. HIV infection was diagnosed at a similar rate in anti-HD-positive and anti-HD-negative patients.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-1076
    Keywords: Key words Haemophilia ; Intracranial haemorrhage ; Prevalence ; Neurological outcome
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A survey among centres of the paediatric group of the GTH was performed to evaluate the prevalence and outcome of haemophiliacs with intracerebral haemorrhage. A questionnaire sent to the centres covered the following points: number of patients with severe, moderate and mild haemophilia A and B; for each patient with ICH: birth date, age at bleeding, aetiology and neurological sequelae. Overall, 30 ICH in 744 haemophiliacs (4.0%) were reported by 17/40 centres (42.5%). There was no significant difference between the prevalence of patients with haemophilia A and B (3.5% vs. 6.3%) and among the age groups. Bleeding was diagnosed within 1 week of birth in 11/27 patients (41%). For 3 patients, no age-related information was given. The most important factor was trauma (17/30 = 57%), either during birth (9/30 = 30%) or later in life (8/30  = 27%). Seizures were common, occurring in 19/30 patients (63%). As 1 patient died after posttraumatic ICH, the neurological outcome of 29 patients could be evaluated. Psychomotor and statomotor retardation and cerebral palsy were reported in 17/29 (59%), 15/29 (51%) and 13/29 (45%) patients respectively. Only 7/29 (24%) showed no neurological sequelae. Severity of deficits was not correlated with birth date but to age at bleeding. Older children showed a better neurological outcome than neonates. Conclusion The frequency and outcome of ICH in haemophiliacs have not changed in our cohort over the past 20 years. Trauma at birth is an important risk factor for ICH in patients with haemophilia A or B. lntracranial haemorrhages in older children are rare, and a better outcome may be expected.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 0888-7543
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Haemophilia 9 (2003), S. 0 
    ISSN: 1365-2516
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Summary.  The aim of this study was to report on the long-term follow-up of haemophilic children with avascular femoral head necrosis and to determine whether radiographic findings at initial diagnosis have any prognostic value. Seven patients with avascular necrosis of the femoral head were clinically and radiographically observed over a period of 5–50 years. The average age of patients at first diagnosis was 7.1 years. At follow-up, three of seven patients claimed to have occasional mild pain in the affected hip, four of seven showed loss of range of motion in the hip joint and two of seven patients showed a limp. Only one patient was clinically completely inconspicuous. The radiographically measured caput–collum–diaphysis angle at follow-up was pathologic in four cases and in one case a lateral subluxation of the femoral head was found. There was marked deformation of the femoral head in three of seven cases and a further two hips showing slight incongruency. Owing to the small patient-number, a statement concerning the prognostic value of defined radiographic signs cannot be made. As expected, the more ‘risk signs’ radiographically found, the higher the likelihood that patients will suffer arthrosis at a later stage. We propose that a clear distinction between haemophilic arthropathy of the hip and Legg–Calvé–Perthes disease should be made. In cases where radiographic changes are also found in the vicinity of the acetabulum, it is indicative for haemophilic arthropathy.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1365-2516
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Summary.  The severe clotting defects associated with the diagnosis of severe haemophilia A and B require a quality management and quality assurance system designed to avoid both bleeding sequelae (such as damaged joints) through early on-demand or prophylactic treatment in a home-care setting, and side-effects such as infectious diseases (hepatitis A–G and human immunodeficiency virus), allergic reactions, haemolysis and if possible inhibitor formation, by using highly purified, virus-inactivated or recombinant products in which the factor VIII and IX proteins are as natural as possible. As the intravenous injection of the required clotting factor is entrusted to the patients in home treatment, the haemophilia centre has to check treatment protocols and, when necessary, joint and muscle status. In addition, it is imperative to ensure the safety of the product, and checks must be carried out to make sure that batch numbers are recalled as soon as possible if side-effects are observed. These are the reasons for several Acts of Parliament in Germany requiring special treatments and regular checks (the Disabled Act, recommendations by the German Medical Council, the Transfusion Act). Thus, at the haemophilia centre in Bonn we have established a special quality management and quality assurance system taking into account the great number of patients (〉 800), the often considerable distance between the centre and the patient, and the aforementioned regulations and laws. Quality management involves dealing with daily practicalities such as 24-h availability of a physician, medical technologist and nurse, careful instruction of patient and family in home care, genetic counselling, regular laboratory tests (especially recovery time, half-life, inhibitors and gene defects, clinical chemistry and serology) and clinical investigations (especially joint and muscle status). It also includes co-operation with family doctors and different departments at our university hospital (e.g. orthopaedic, microbiology), daily conferences with staff, information for nursery schools, schools, training institutions and/or the workplace in case of emergency, and cooperation with German haemophilia foundations. For quality assurance, several self-controlling systems are in place, such as distribution of concentrate, laboratory data, treatment protocols, joint and muscle status and bleeding tendencies. All these and more are double-checked and interactive, controlling data and activities with the help of EDP. Exceptional staff motivation and patient compliance are important for this quality system.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford UK : Blackwell Science Ltd
    Haemophilia 7 (2001), S. 0 
    ISSN: 1365-2516
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Patients with severe haemophilia A growing up before the establishment of prophylactic treatment frequently developed significant haemarthropathies. The goal of the following study was to clarify the role of haemarthropathic pain for haemophilic patients. Furthermore, we aimed to determine to what degree daily activities are influenced by the impairment and which therapeutic modalities are used in pain management. Using a questionnaire we consulted 71 haemophiliacs concerning their complaints and how they were treated in 1999 (average age 43 years; range 21–63 years). The pain in the large joints and spine and the effect of specific treatment was estimated by a visual analogue scale. On average, there were four joints with major pain and 0.5 with minor pain. The most frequent sources of pain were the ankle joints (45%), followed by the knee (39%), spine (14%) and elbow (7%). Fifty percent of all patients complained of pain throughout the day if no treatment was applied. In 29% of patients, pain persisted after application of factor VIII (FVIII), while 12% claimed that pain still remained after use of FVIII and painkillers. Restriction in activities of daily life was reported by 89% of the group and 85% reported on an impact of pain on their mood. Patients primarily used FVIII to decrease pain, followed in frequency by use of anti-inflammatory drugs, orthopaedic footwear, liniments and bandages. Haemophilic patients with haemarthropathy are chronic pain patients. By means of the questionnaire, it is possible to reveal the ‘silent’ sufferers. Sufficient pain treatment is essential so as to increase the patient’s quality of life and avoid inadvertent abnormal postures possibly resulting in increased loading of joints and subsequent bleeding episodes.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Haemophilia 2 (1996), S. 0 
    ISSN: 1365-2516
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: In order to assess whether addition of a modified pasteurization step to the manufacture of a solvent/detergent-treated factor VIII concentrate of high purity has affected its properties, three sets of pharmacokinetic studies were performed. In an open, controlled study with seven patients and a double-blind cross-over study with nine patients, the pharmacokinetic parameters of the double virus-inactivated preparation were compared with those of a mono-inactivated product, using a one-stage clotting assay. In a longitudinal study comparison was made between baseline and 8 months after treatment with the double virus-inactivated product in six patients, using three different factor VIII assays. There were no differences in recovery, clearance or half-life between the single- and double-inactivated products. After 8 months of treatment, the half-life and mean residence time were longer with the one-stage clotting assay, whereas the chromogenic assay showed a lower recovery, a faster cleareance and smaller area under the curve with the double virus-inactivated product. All differences were small and none was consistent in all three methods. In conclusion, the double virus inactivation does not appear to have affected the pharmacokinetic characteristics of this factor VIII preparation.
    Type of Medium: Electronic Resource
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