| serological investigations for leptospirosis in humans in columbia. | the authors examined serologically 353 clinically healthy persons in 5 localities in south columbia for leptospirosis using the mal-reaction with 15 serovars of 15 serogroups. the positivity was high - 18.4% namely with the serovars of the serogroups icterohaemorrhagiae, canicola, pyrogenes, australis, pomona, grippotyphosa, sejroe, hebdomadis, bataviae, panama and shermani. sera reacted positive in titer levels of 1:400 and higher only with the serovars of the serogroups icterohaemorrhagiae, ca ... | 1989 | 2583505 |