[Epizootiological research on salmonellosis in swine]

The epizootiology of Salmonella infections in swine was studied in 1970-1980 in 7 districts of this country on a number of farms and industrial complexes in order to elucidate some aspects of the epizootiologic process. A total of 26,957 samples taken from swine and the environment were studied bacteriologically. An industrial complex in each district served as a test one to investigate samples from various groups of swine in the technologic process. It was found that salmonelloses did exist, and Salmonella organisms were isolated from pigs on all studied farms and complexes, however, no diseases and organisms were recorded with both animals and the environment in Swine Nucleus Bases. On the complexes Salmonellae were isolated from pigs of all technologic groups, and, in most cases, the Salmonella species coincided by sows and pigs. This explained the stationary character of the disease on some complexes where a sui generis epizootic process ran its course, exhibiting particular aspects and correlations. Salmonella organisms were isolated in 0.95 per cent of the investigated samples from the test groups on the test complexes as well as in 4.13 per cent of the groups out of the experiment. In samples taken from other complexes, farms of AIC, IAC, auxilliary farms, etc., there were positive findings in 5.32 per cent of the cases. Enzootics on the complexes were most common with pigs aged 40-50 days as against farms with traditional types of technology where 2-4-month-old pigs were involved.(ABSTRACT TRUNCATED AT 250 WORDS)