[Attempted induction of experimental allergic neuritis in guinea-pigs and monkeys using a human ischiadic extract (author's transl)].
Explore the source record for details and available documents.
Animals↗
Biomedical subjects
L I Ravkina
Publications and source records attributed to L I Ravkina.
Latent infection and measles meningoencephalitis in Syrian hamsters.
A strain designated 42-Edmonston was isolated from the brain of a Syrian hamster 30 days after inoculation during the neonatal period with the reference "wild" measles virus strain Edmonston which produced a latent infection accompanied by production of measles antibody and insignificant pathomorphological changes. Intracerebral inoculation with the 42-Edmonston strain of newborn, one day-and 5-7-day-old Syrian hamsters resulted in the development of acute measles encephalitis with typical clinical symptoms and pathomorphological changes. It is suggested that selection and adaptation of a neurotropic measles virus variant probably had occurred in the course of virus persistence in the Syrian hamster brain.
Animals↗
An attempt of treatment of malignant melanoma with bovine pineal tissue.
Seven incurable patients with disseminated malignant melanoma were injected (subcutaneously, sometimes intravenously) with homogenate of bovine pineal tissue. The daily injections of large quantities of pineal tissue appeared to be harmless for patients. Many-fold injections (during 9.5 months) of large quantities of pineal tissue (up to 3950 g) in 1 of 7 cases produced certain effect on subcutaneous metastases of malignant melanoma, i.e. causing reduction and even disappearance.
Adult↗
[Determination of the gliotoxie and demyelinating properties of serum in organ cultures of brain in experimental allergic encephalomyelitis].
The report contains some results of a study of the blood serum taken from guinea pigs and macacus rhesus with allergic encephalomyelitis to a glyotoxic and demyelinizing effect in an organ culture of the brain in newborn rats and adult macacus rhesus. It was demonstrated that the test has a high specificity to a glyotoxic effect of the blood serum in experimental allergic encephalomyelitis and a less specificity to demyelinization in vitro. The authors describe in detail the method of studying the serum in organ brain cultures.
Acute Disease↗
[Morphologic changes in the central nervous system of monkeys with chronic experimental allergic encephalomyelitis].
The authors attained a chronic experimental allergic encephalomyelitis in monkeys (macacca rhesus) by immunizing them with small doses of encephalitogenic mixtures. A histological study displayed large foci of demyelinization which had the appearance of plaques with gliosis and a developing gliofibrosis which is similar to those seen in disseminated sclerosis. The paper shows the existence of transitional forms between plaques and perivascular foci of demyelinization. The suggestion is made concerning the mechanism of the formation of plaques by a confluence of perivascular foci. There is also a constant lesion of visual nerves--inflammation and a massive demyelinization. The achieved data are considered as a model of disseminated sclerosis.
Animals↗
[Change in the nature of the persistence of alpha- and flaviviruses in the body of BALB/c strain mice with a mixed infection with leukovirus].
The features of pathogenesis of infection caused in adult Balb/c mice intraperitoneally infected with Sindbis virus, virulent or attenuated strains of West Nile (WN) virus, individually or in combination with Rauscher leukemia virus (RLV) were studied. The influence of the latter on the course of togavirus infections was characterized by 3 features: (a) different effects on the visceral and neural phases of the pathogenesis (increased period of viremia and virus reproduction in the viscera did not lead to stimulation of virus reproduction in the CNS); (b) changes in the time of togavirus persistence in the infectious form; (c) the dependence of the observed effect on the togavirus properties.
Animals↗
[Chronic measles neuroinfection in Syrian hamsters].
Measles neuroinfection was studied in 3-week Syrian hamsters inoculated intracerebrally with the neurovirulent Edmonston-42 strain of measles virus. The infectious virus was shown to be recoverable from the animals' brains both early after infection (up to 16 days) and at later intervals (28--63 days). At the same intervals (up to 69 days), measles antigen was demonstrated in brain impressions. All the animals under study had RNA-containing inclusions in some cells, slight cellular infiltrates and some oedema. Brains of a number of animals showed moderate inflammatory changes, dystrophic lesions in neurons, and microglial proliferation. The influence of the age and general resistance to the pattern of the course of measles neuroinfection in Syrian hamsters was demonstrated.
Animals↗