Salmonella strains were isolated from feedstuff and poultry feeds from several regions of Brazil in 1976 and from 1979 to 1991. Serotyping of 2293 isolates showed 151 serovars which pertained to 17 serogroups and were classified as subspecies I (99.6%), IIIa (0.33%) and IV (0.04%). There was a predominance of groups O:7 (30.4%), O:4 (24.5%), O:3,10 (19.1%), O:13 (7.8%), O:1, 3,19 (4.9%) and O:18 (3.7%), representing 90% of the serogroups characterized that accounted for 103 different serotypes (68.2%). Predominant serovars isolated from all sources were S. Montevideo, S. Senftenberg, S. Havana, S. Mbandaka, S. Tennessee, S. Infantis, S. Agona, S. Anatum, S. Cerro and S. Bredeney. Bacteriological and epidemiological aspects and the relationship with serovars isolated from poultry are discussed.
Poultry feeds
