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PubMedDate not supplied

[Characteristics of the epidemic process in enterovirus infections in relation to the study of a serous meningitis outbreak].

The etiological investigation of an epidemic outbreak of aseptic meningitis occuring in 1978 in Khabarovsk was performed. The leading etiological agent was found to be ECHO-4 virus. Some of the cases were associated with ECHO-20 and Coxsackie B1 viruses. Investigation of the herd immunity to these viruses in the urban population showed that before the outbreak the immune portion to ECHO-4 and ECHO-20 viruses was low, particularly in children and youngsters. This might be due to the fact that active circulation of these viruses and outbreaks of diseases associated with them had occurred 13--15 years before. The immune portion to enteroviruses in different towns of the Far East was shown to be uneven. The results of investigations of the epidemic outbreak and herd immunity permit to consider it to be a typical manifestation of the cyclic circulation of enteroviruses in the territory and in time.

Adolescent↗
PubMed1976

Enterovirus infections in acute pancreatitis - a possible etiological connection.

All patients admitted with a preliminary diagnosis of acute pancreatitis during a one-year period were subjected to virus investigations. 142 patients were included in the study and of these 91 were found to have acute pancreatitis. Evidence of enteroviral infection was found in 18 of the 91 patients (19.8 per cent). From 17 of the 18 patients enterovirus was isolated from feces or urine, and in one a significant titer rise (CF-test) against Coxsackie virus B5 was found. A significant titer rise of antibodies against the virus type isolated could be demonstrated in 7 of the 17 patients. Thus in 8 cases there was obvious evidence of an acute enteroviral infection during the episode of acute pancreatitis. The etiological agents in these cases were Coxsackie viruses B2, B3, and B5, and ECHO-viruses 6, 11, 22, and 30.

Acute Disease↗
PubMed1988

Chronic enterovirus infection in patients with postviral fatigue syndrome.

76 patients with the postviral fatigue syndrome (PVFS) and 30 matched controls were investigated. Virus isolation was attempted from concentrated faecal samples by direct culture and after acid dissociation of virus from antibody. Positive cultures of enteroviruses were obtained from 17 (22%) patients and 2 (7%) controls. An enterovirus-group-specific monoclonal antibody, 5-D8/1, directed against the VP1 polypeptide, was used to detect enteroviral antigen in the circulation, either free or complexed with antibody. VP1 antigen was detected in the serum of 44 (51%) of a further group of 87 PVFS patients. The number of patients positive for VP1 antigen was greater (42/44) when IgM complexes were detectable than when they were not (2/23). 1 year later, the 17 patients of the first group of 76 with positive cultures were again studied. The same virus was again isolated from 5 (29%), 13 (76%) had detectable IgM responses to enteroviruses, and 9 (53%) were positive for VP1 antigen in the serum. These results show that chronic infection with enteroviruses occurs in many PVFS patients and that detection of enterovirus antigen in the serum is a sensitive and satisfactory method for investigating infection in these patients.

Antibodies, Monoclonal↗
PubMed1991

Therapeutic effects of bovine enterovirus infection on rabbits with experimentally induced adult T cell leukaemia.

A bovine enterovirus, MZ-468, showed cytopathic effects on cell line F-647a, which was established by coculture of human T cell lymphotropic virus type 1-transformed MT-2 cells and X-irradiated rabbit lymphocytes. Microcalorimetric assay showed that residual, viable, MZ-468-infected F-647a cells produced less heat than non-infected cells. The therapeutic effects of MZ-468 infection were examined in rabbits in which adult T cell-like leukaemia (ATL) had been induced by inoculation of F-647a cells (1 x 10(8) cells). Six newborn rabbits were separated into three groups: group A was inoculated with F-647a cells only; group B was treated with MZ-468 at the time of inoculation with cells; group C was treated with the same amount of virus 24 h after the inoculation with cells and then once every 4 days. Both of the animals in group A and one in group C died 10 and 11 days, and 22 days, respectively, after the inoculation with cells. Both rabbits in group B and one in group C survived for more than 4 months. The rabbits that died were examined pathologically; leukaemic infiltrations were found in the lungs of the group B rabbits, and in the lungs, spleens and livers of both group A rabbits. Two identical experiments produced almost the same findings. These results suggest that bovine enterovirus might be used clinically to prolong the life-span of ATL patients.

Animals↗