Biomedical subjects
Publications and source records attributed to W Sadowski.
Cyclophosphamide and hydrocortisone treatment of measles virus infected guinea pigs resulted in suppression of cele- and antibody mediated immune reactions although a high dose of measles virus (10(5.5) TCID50) was used for infection: MIT was delayed and depressed; HI serum antibody response was almost completely inhibited.
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Monkeys and guinea pigs were immunized with various doses of measles and mumps viruses. A cell-mediated response measured by leukocyte migration inhibition occured during the first two weeks after immunization. In case of measles virus, marked migration inhibition occurred already on the 7th day in monkeys and guinea pigs immunized with high virus doses. The response declined as early as 14 days after immunization in contrast to the group of guinea pigs inoculated with a lower virus dose. In these animals the response sustained for up to 50 days. Immunization of animals with various doses of mumps virus was similar and positive responses were obtained in the absence of detectable antibodies. Even 2.5 TCID50 of mumps virus induced the response although more irregularly than 250 or 2500 TCID50 virus.
Cercopithecus aethiops monkeys were inoculated intracerebrally with Sabin's type 3 polivoirus strain, and with strains isolated from subjects vaccinated with Leon 12a1b and from their contacts. Sample of brain, spinal cord, kidneys, lymph nodes, blood and spinal fluid were taken. From these materials, (except of kidneys) 23 poliovirus strains of type 3 were isolated. Genetic markers rct 40.3, rct 41, d and IST were determined for these strains. The changes observed in genetic markers of strains passaged through the cental nervous system (CNS) of monkeys are described.
The parameters of migration inhibition test of leucocytes isolated both from the peripheral blood, spleen and lymph nodes of monkeys Cercopithecus aethiops were determined. Concentration of measles virus that does not produce nonspecific migration inhibition of leucocyte obtained from sero-negative animals was also defined.
Experiments discussed in this paper aimed at obtaining, using Cercopithecus aethiops monkeys information on immunogenic activity of measles virus as well as kinetic and persistence of immunological reaction at active and inactivated virus.
The markers d, IST, EA1(OH)3 and rct at sub- and supraoptimal temperatures as well as neurovirulence (PMic) for monkeys was determined for strains isolated from children vaccinated with Leon 12a1b vaccine, their contacts and from paralytic cases. The strains were isolated at early and late phases of excretion. The changes concerned mainly rct determined at supraoptimal temperatures, d and PMic markers, especially in strains isolated at the late phase of excretion. The passage through the human alimentary tract did not change such markers as IST and EA1(OH)3. Some degree of correlation was observed between the rct 40.3, d and PMic markers.
Markers d, IST, EA1(OH)3, rct (at sub- and supraoptimal temperatures) and neurovirulence were determined for clones isolated from two lots (S2 and S3) of vaccines containing poliovirus strain Leon 12a1b. Changes of markers rct, d and neurovirulence were observed in several clones isolated from S2 vaccine. No changes were observed in IST and EA1(OH)3 markers.
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