| a serologic survey of rice-field leptospirosis in central luzon, philippines. | although human cases of leptospirosis have been reported from the philippines, there is a lack of data on its prevalence. we therefore surveyed three rice-farming villages for the presence of leptospiral antibody. out of 155 sera tested, 63 (43.6%) tested positive using the standard microagglutination test. antibodies were more frequent in men than women (48 vs. 31%, respectively, p less than 0.01), and less common in the elderly. exposure to leptospires occurs frequently in rice farmers, and le ... | 1988 | 3227399 |