| bacteriological survey of leptospirosis in zaria, nigeria. | a total of 252 rodents were trapped in the environs of ahmadu bello university, zaria, over a two-year period, of which 221 were brown field rats (arvicanthus niloticus). only these were found positive (4.5%). titers were detected against leptospira interrogans, serovars australis, icterohaemorrhagiae, tarassovi and hardjo. all positive sera except one reacted against a single serovar. eight isolates were obtained from field rats: five were serovar australis, one ballum and two unidentified. fiv ... | 1982 | 7043824 |