| leptospirosis of pig farmers: the results of a serological survey. | serum samples were examined from 70 people working or resident on 41 pig farms within a 50 km radius of palmerston north. of the 65 people with occupational pig contact, 20 (31 percent) had microscopic agglutination titres of 1:24 or greater to one or more serovars of leptospira interrogans, the majority of which were to pomona, the pid adapted serovar. there were significant positive associations between those people with a titre and those with a history of previous diagnosis of leptospirosis b ... | 1982 | 6954386 |