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An increase in number of Salmonella serovar Mbandaka in animals was observed in Poland in the years 1995 - 1997. Eighty seven Salmonella serovar Mbandaka strains isolated from animal feed, poultry and food products were examined biochemically. Two biotypes were found, but 96.6% oTTfitf strains belonged to inositol-positive biotype I. All strains tested were lysed by phage O-l. Resistance to at least...
An investigation of food poisoning cases caused in our country by Salmonella spp has been carried out by the Sanitary and Epidemiological Station, in recent years. It has show that the majority of foci of this disease is related to the consumption of foods containing hen eggs which had not undergone heat treatment, such as mayonnaise, creams, ice cream and other products. The world egg production...
The aim of the studies was the use of Haemophilus somnus vaccine in the immunization of chickens to protect them against Salmonella infections by increasing the local cross-immunity of the alimentary tract. Broilers were immunized with a live vaccine administered in drinking water on the 1st and the 14,h day of life. The groups were as follows: H. somnus (24h broth culture, 109 cfu/ml); Salmonella...
The aim of this study was to determine of influence of 15 strains of lactic acid bacteria on the growth of 7 Salmonella spp. strains in model set-ups, and in meat and ripened fermented sausages. The investigations were performed within the framework of three alternate stages which differed in respect to the products studied, the number of Lactobacillus spp. strains and, partly, methodological approach...
The aim of this study was to prove that PCR is a very useful method to identify Salmonella strains and to determine their virulence factors by amplification of characteristic genetic markers. Investigations included 5 strains of Salmonella which were obtained from pure cultures and 1 Salmonella strain from the mixed culture. Genotypie analysis of 6 examined strains revealed the 163-bp fragment of...
From epidemiological and safety point of view, petfoods produced from edible and non-edible animal by-products should be safe for slaughter animals, owners of these pets and environment. Domestic animals are recognized as highly important reservoir of pathogenic microorganisms for man. The close contact of people and especially children with pets may constitute a serious hazard for their health. Taking...
Variety of traits important in diagnostics and epidemiology of pathogenic microorganisms may change due to antibiotics. Movement ability, that is characteristic for every serovar except from Salmonella Gallinarum-Pullorum, is important to salmonellas. In own experiments using semi-fluid MSRV medium, it was found that a decrease in salmonella sensibility to selected antibiotics and chemiotherapeutics...
Serological tests applied in poultry flocks can be a valuable tool in assessing health of hens. One obstacle in making this assessment is that results of serological tests in a given flock are not always correlated with results of bacteriological tests. The aim of this study was to determine dependencies between the level of antibodies in egg yolk and the contamination of egg contents (whites and...
Sialic acids are important constituents of animal tissue glycoconjugates and are also present in the antigens of some bacterial strains. Capsular polysaccharides with sialic acid (NeuAc) have been extensively studied with regard to sensitivity to the bactericidal action of serum, whereas little is known in this regard about lipopolysaccharides (LPS) which contain NeuAc. Strains of Salmonella 048,...
The aim of this study was to determine the simultaneous occurence of Salmonella spp., L. monocytogenes, verotoxigenic E. coli (VTEC), and Campylobacter spp. in slaughtered cattle and in beef meat subjected for human consumption. A total of 406 bovine hides and 406 corresponding carcasses were used to collect the samples with a swab method after exsanguination and evisceration of animals, respectively...
The aim of this study was to investigate changes in selected parameters of cellular immune response in the conditions of endotoxin fever and pyrogenic tolerance in pigeons. On the first day of observation the experimental birds (n=18) were intravenously injected with Escherichia coli LPS at a dose of 10 μg/kg b.w., while the control animals (n=6) received apyrogenic physiological saline also in the...
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