[Immunological control in the system of epidemiological surveillance over infections with different mechanisms of causative agent transmission]. / Immunologicheskii kontrol' v sisteme épidemiologicheskogo nadzora za infektsiiami s raznymi mekhanizmami peredachi vozbuditelia.

The results of immunological control of infections with different mechanisms of the transmission of their causative agents (diphtheria, measles, viral hepatitis, salmonellosis) for many years are summarized. About 25,000 serum samples taken from humans and more than 10,000 probes from agricultural animals have been studied in the passive hemagglutination test and more than 3,600 serum samples have been studied in the enzyme immunoassay for the presence viral hepatitis markers. Planned immunological control has ensured greater possibilities of the epidemiological diagnosis and prognostication of complications in the epidemic and epizootic situations. Urgent immunological control has made it possible to establish the proportion of non-manifest forms of diseases, to differentiate the foci of infection by transmission routes, to determine the degree of protection from infection and to substantiate the tactics of individual immunization.

[An evaluation of the scope of the circulation of Salmonella among the workers of commercial poultry- and meat-packing enterprises based on serological study data in the PHA test]. / Otsenka shiroty tsirkuliatsii sal'monell sredi rabotnikov predpriiatii promyshlennogo ptitsevodstva i miasokombinata po dannym serologicheskikh issledovanii v RPGA.

Serum samples from 641 workers of large poultry and meat-packing plants were studied in the passive hemagglutination test with the use of Salmonella complex and serogroup diagnostica. A specific increase in the level of anti-Salmonella antibodies in 60.7% of poultry plant workers and in 9.8% of meat-packing plant workers was established. Among the workers of the poultry plants the most pronounced immune shifts were detected in persons having contacts with sick poultry and pathological material and among the employees of the meat-packing plant, in those who ate raw sausage meat. A high level of antibodies in the professional groups under study was observed as early as in the first year of work at the plant and persisted over the whole period of this work. Under the conditions of constant contamination of the workers of poultry and meat-packing plants with small doses of salmonellae specific immunity to this infection was seemingly induced, which inhibited the development of the manifest forms of infection, but did not prevent the formation of chronic carrier state.

[Results of an epidemiological study of familial foci of salmonellosis in the Western Urals]. / Rezul'taty épidemiologicheskogo izucheniia semeinykh ochagov sal'monelleza na Zapadnom Urale.

The study of 449 family foci of salmonellosis demonstrated the possibility of detecting cases of salmonellosis, not diagnosed by clinical and bacteriological methods, in the passive hemagglutination test. Such undetected Salmonella carriers, not observing the rules of personal hygiene, contributed to the contamination of household articles, foodstuffs and the environment. The formation of the family foci of salmonellosis was facilitated by the belated detection and hospitalization of salmonelloses cases, as well as by the inadequate observance of the rules for infant care and feeding.