Salmonella serovars isolated from poultry material from 1994 to 1999

Abstract

Salmonella serovars isolated from poultry material from different geographical areas were identified in the 1994-1999 period. A total of73 serovars was isolated, with recognition of21 different serovars distributed in nine serogroups. Enteritidis was the serovar with highest incidence, 46.57%, and was isolated from feed, litter and meat, poultry byproducts and fish meal. Natum had the second highest incidence, 6.84%, and 80% of isolations were made from meat meal. S. pullorum represented 2.73% of the isolations, 100% from brown layers, confirming their susceptibility to infection by this serovar. Of the materials included in the present study, broilers and meat meal had more Salmonella spp., 41.09% and 30.13%, respectively. Among the serovars isolated from broilers, 83.34% were enteritidis, but this serovar was not isolated from meat meal. The geographical area with the highest isolation of Salmonella spp. was the state of São Paulo with 82.19%, followed by the state of Maranhão with 8.21 %. The state of São Paulo was responsible for 79.41 % of S. enteritidis isolation. As the Enteritidis serovar belongs to the serogroup 0:9,12, most isolations belonged to this serogroup, but it was the serogroup 0:6,7 that had the highest variation. Due to the role of poultry in the spreading cycle of this bacteria, the importance of epidemiological tracking of Salmonella in the poultry industry was shown, involving not only the health status of birds but also public health aspects.