Phenotypic characteristics of Salmonella Gallinarum and Salmonella Pullorum isolated from layers

This paper is an assessment of current infections with S. Gallinarum and S. Pullorum in commercial flocks of caged layers in the south-west reegion of Poland and gives a characteristics of isolated Salmonella strains. In 1999-2000, infections with S. Gallinarum and Pullorum were found on 10 f arms of; layers (brown: laying hens aged 18-55 weeks). The following were determined in the isolated Salmonella strains: biochemic al properties (a biochemical kit designed by the authors and AN 20E and bio Merieux tests), attachment to serovar (serum agglutination test, Immunomed Gdansk and Biomed Krakow) and susceptibility of chemotherapeutics in vitro. The clinical picture of the infection and lesion score were typical for the acute fowl typhoid. The isolated strains of Salmonella comprised: 10 strai ns (62.5%) of S. Gallinarum and 6 strains (37.5%) of S. Pullorum, with; str ains of S. Gallinarum belonging to one biochemical line (PB2) and of S. Pul lorum to two biochemical lines (PB1 and PB3). All strains of S. Gallinarum and S. Pullorum were susceptible in vitro to amoxicillin, amoxicillin with clavulanic acid, enrofloxacin, norfloxacin, and neomicin. The preparations mentioned were not effective in vivo. Twelve resistance profiles (RP) to ch emotherapeutics were determined for the isolated: strains of Salmonella. Fi eld strains of S. Gallinarum and S. Pullorum are very different: as to chem otherapeutics sensitivity, but S. Gallinarum to an even greater degree.