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Biomedical subjects

F Steck

Publications and source records attributed to F Steck.

At least 37 records · Page 2Linked to original sources
PubMed1978

[The re-emergence of human rabies in Switzerland. A case history].

The circumstances, clinical symptoms, and outcome of a case of human rabies are reported. The disease was conveyed by a housecat. Since the report gave no cause for concern, antirabies vaccination was not considered to be necessary. After a delay of 157 days prodromi appeared and the patient was finally hospitalized 3 days later displaying signs of the encephalitic stage. After 2 days, the patient went into the paralytic stage; death occurred 3 days later due to refractory circulatory and respiratory failure. In endemic rabies areas such as Switzerland, human rabies may, as demonstrated by our case report, always sporadically occur. Rabies should be considered in cases of encephalitis or encephalitis-like syndromes.

Adult↗
PubMed1978

[Rabies in a veterinarian].

A 57-year-old veterinary surgeon developed rabies 174 days after injury during an oral palpation of a rabid cow. He had been vaccinated prophylactically with Duck embryo vaccine several months before exposure but never had his serum antibody level controlled. He died 45 days later. The prodromal and encephalitic stage lasted 5 days each. Intensive supportive medical treatment was given from the beginning of the paralytic stage. The clinical course was complicated by progredient respiratory failure, diabetes insipidus, severe hypotension, and increase of intracranial pressure. The diagnosis of rabies was confirmed by rising antibody titers prior to the patient's death.

Animals↗
PubMed1978

[Epidemiology of rabies (author's transl)].

Rabies is widespread in all continents except Australia. As an anthropozoonosis its main importance is in areas with uncontrolled dog rabies, nowadays principally topical and subtropical regions. The greatest economic losses however are encountered in the cattle herds of South and Central America, where paralyssa prevails. In the northern hemisphere particularly rabies is enzootic among wildlife. Under the given ecological conditions only one or two species act as primary vectors of the infection. In Europe and parts of North America the red fox, in the arctic regions the arctic fox; in the middle West of the USA the skunk and in smaller foci the raccoon and mongoose are the reservoirs of rabies.

Animals↗
PubMed1978

IgM and IgG antibody profiles after immunization of man with a HDCS-vaccine (preliminary communication).

HDCS vaccine was given to 20 healthy, not rabies-exposed people on days 0, 3, 7, 14, 28 and 90. Ten of them received in addition 20 IU/kg of human antirabies immunoglobulin. Vaccine potency in NIH tests was 1.8 (WHO). Most individuals did not show any measurable neutralizing antibody titer on days 3 and 7. On days 14, 28, 90 and 300 the mean of titres was above 1:200; with one exception, no titer was lower than 1:50. The sera of days 14 and 90 were separated on "Sephadex G-200" columns. On day 14 at least 46% of the rabies antibody was found in the IgM fraction, while 15% was recovered from the IgG fraction. On day 90 the proportion recovered from the IgM fraction had decreased to 17%; the IgG antibody had increased to 30% of the titres found in whole serum. Almost no antirabies activity was found in the IgG fractions.

Antibody Formation↗
PubMed1978

Humoral immunity conferred by the HDCS rabies vaccine Mérieux administered after exposure: 151 cases with and without specific immune globulin of human origin. Preliminary communication.

The results of the analysis of the neutralizing antibodies measured at days 30 and 90 after vaccination are described in brief. Different lots of Mérieux vaccine were used, of which two were checked separately for relative antigenic value by the Federal Public Health Service (CH). The lowest antigenic value (lot 0420 M) was 1.6 in relation to the standard NIH vaccine No.182. The inhibiting effect of immune globulin was shown to be significant with this lot, but not with the other, more powerful lots. The attention is drawn to isolated cases which did not present antibodies--or not a sufficient count--on days 30 or 90 according to the RFFI test.

Adult↗
PubMed1977

[Attempts at postexposure active and passive human rabies immunization].

For several years now in Switzerland, postexposure prophylaxis against rabies has been performed with duck embryo vaccine containing inactivated virus. According to WHO recommendations, 14 consecutive daily injections are given subcutaneously followed by 3 booster injections 10, 20, and 90 days later. In addition, a recently developed human diploid cell vaccine has also become commercially available in Switzerland. This study is concerned with the question whether, by the use of the latter vaccine, sufficient antibody titres can be achieved with a smaller number of injections given at longer intervals. Furthermore, the question was studied whether simultaneous administration of homologous human hyperimmune gamma-globulin together with the first vaccination dose inhibits antibody production. "Vaccin rabique inactivé Mérieux", cultivated on human diploid cells, was injected on days 0, 3, 7, 14, 28, and 90. A group of 10 healthy volunteers received active vaccination only, while another group of 10 volunteers received Rabuman Berna, 20 U/kg, in addition. Antibody titrations were done by means of a neutralization test on monolayer cell cultures. On day 14, antibody titers of at least 1:100 (corresponding to more than 3 IU/ml) were found in both groups. There was no indication of significant inhibition of antibody production as a consequence of the combined active/passive vaccination.

Animals↗
PubMed1977

Physicochemical characterization of two serologically unrelated equine rhinoviruses.

The physicochemical properties of two serologically distinct equine rhinoviruses have been examined. Each virus sedimented at approximately 160S but co-centrifugation of the two viruses in a sucrose gradient revealed a small difference in their sedimentation coefficients. The two viruses also have different buoyant densities in cesium chloride. The equine rhinovirus type 1 equilibrated as a sharp peak at 1.45 g/ml whereas the type 2 virus equilibrated as a heterogeneous band with a peak at 1.44 g/ml but ranging in density from 1.41 to 1.45 g/ml. The relative sedimentation coefficients of the two virus RNAs were 35S for rhinovirus 1 and 37S for rhinovirus 2. A limited number of base composition analyses also showed differences between the two virus RNAs. The polypeptide profile of each serotype in polyacrylamide gels was generally similar to those of other picornaviruses but the two serotypes could be distinguished readily from each other.

Antigens, Viral↗
PubMed1976

Marek's disease in chickens: development of viral antigen in feather follicles and of circulating antibodies.

The infection of young chickens with Marek's disease herpesvirus (MDHV) leads to the early appearance of viral antigen in the bursa Fabricii, in the kidney tubular epithelium, and particularly in the epithelial cells of growing feather follicles (Calnek and Hitchner, 1969; Purchase, 1970). Viral antigen may persist in feather follicles over several months, whereas in neural lesions or in lymphoid tumors induced by MDHV viral antigen is either lacking or present only in a few cells (Calnek and Hitchner, 1969; Spencer and Calnek, 1970; Purchase, 1970). Haider et al. (1976) have pointed out the high diagnostic value of the double-diffusion agar-gel participitation test (Chubb and Churchill, 1968) using growing feathers of MDHV-infected chickens as antigen.

Animals↗